The Building With No Client: Vacant Property, Demolition and Who Pays for the Rats

1. Introduction: the property nobody is treating

Every article in this journal about rodent control has assumed a building with somebody in it. This one is about the other kind.

1.1 Pest work with no occupant and no complaint

Required by the fact of demolition alone.¹

1.1b And the category is larger than it looks

Between a lived-in house and a demolished one sit properties held by estates, awaiting sale, repossessed, condemned, or simply left. Each is a building with a pest situation and no occupant, and none of the articles in this journal so far has described one.

1.2 What this article argues

That the enforcement machinery for rodent harbourage assumes an owner who can be reached, that vacant property is where that assumption fails, and that the one rule we found which handles it properly does so by attaching the obligation to an event rather than to a person. Sections 6, 16 and 20 are the case.

1.3 And a warning about the evidence

This article rests on news reports, municipal web pages and trade material rather than on research literature, which §29 sets out and which should colour everything below.

2. What the code says

Taken from one county's published guidance.

As specified in the county code, each resident is responsible for keeping their property free of rat harborage.²

2.0b And responsibility is placed on the resident

Which is the right party for an occupied house and the wrong one for an empty building, where there is no resident by definition.²

2.1 Harbourage rather than rats

Which is the right target, since our articles on refuse containerization and on exclusion both found that conditions rather than animals are the lever, and which is also the thing a building can provide while standing empty.

3. And it is explicit about spread

In the same paragraph.

Rats are a community problem that must be addressed by all residents. When a rat infestation exists at one location it may easily spread to adjacent properties.²

3.0b And the remedy offered is collective

Addressed by all residents, in the code's own phrasing, which is a description of what would work rather than a mechanism for producing it.²

3.0c And it is unusual for a code to say so

Most property maintenance provisions address a condition on a parcel as though the parcel were closed. This one states that the condition travels.²

3.1 So the code recognises the externality

Which is more than most regulation this journal has examined manages, and the difficulty is what happens next rather than whether the problem is understood.

4. The complaint route

Which exists and is specific.

To report rats on another property, or a property with conditions conducive to rats, a complaint may be submitted online, and the exact address must be provided.²

4.0b And the complaint may be made by anyone

Which is the mechanism by which a problem with no occupant gets reported at all, since nobody inside the building is going to.²

4.1 Conditions conducive is a useful phrase

It permits a complaint about a property where no animal has been seen, which matters for a building nobody enters.²

5. The chain that follows

An inspector who affirms a violation issues a correction notice carrying a compliance date, which varies depending on the code. A citation notifies the owner that the property has not been brought into compliance and that they will have to attend a hearing before an administrative law judge.³

5.1 And the county reports resolving many cases without treatment

Through distribution of educational materials to residents and various code enforcement techniques, with the county stating that not all neighbourhoods will require or receive extermination.²

5.2 Which is an education and enforcement programme with treatment attached

Rather than a treatment programme, and it matches the ordering our containerization and federal programme articles both found: chemical control last, and named last.

6. Which assumes somebody at the end of it

Our reading, and it is the article's central point.

A correction notice is delivered to an owner. A compliance date is a date by which an owner must act. A citation notifies an owner. A hearing is attended by an owner. Four steps, one assumption.

6.1 And the assumption is invisible in the drafting

Nothing in the published description of the process states that an owner must exist, because in every case the process was written for, one does.

7. Where vacancies come from

One account of the origins.

Each vacant house has its own story, and for some it starts with the passing of an elderly homeowner, with no family to take over the property or no will in place to designate ownership.⁶

7.0b The intestate case is the hardest of the three

A foreclosed property has an institution holding it and a tax sale produces a purchaser. A house whose owner died without a will and without heirs has a title nobody has established, which is a court matter rather than an administrative one.

That distinction is ours and none of our sources draws it.

7.1 Others arrive through foreclosure

One city's situation is described as decades of depopulation and deindustrialisation compounded by recent massive waves of mortgage and tax foreclosure.⁵

8. So the notice has no recipient

Which is not a failure of the code.

The code is written correctly for the case it was written for. A property with a contested, unrecorded or absent title is a case it was not written for, and no amount of enforcement effort produces an owner where the records do not have one.

8.0b The notice is not a trivial step to lose

Everything downstream depends on it: the compliance date runs from it, the citation refers to it, and the hearing is about whether it was complied with. A chain of four steps fails entirely at the first.³

8.1 And where there is an owner they may lack means

An estate with no assets and a property with negative value produce the same practical outcome as no owner at all.

Both observations are ours.

9. What the officials say

Which is unambiguous.

The official who oversees one city's rat programme, as chief of property management in its solid waste bureau, cited vacant buildings as one of the biggest hurdles to controlling the city's rats.⁴

9.0b And the role is worth noting

The rat programme sits under a solid waste bureau and the official runs property management within it, which is a placement consistent with our containerization article's finding that refuse management ranks first among rodent strategies.⁴

9.0c And the word is hurdles rather than causes

Which is a statement about what obstructs the programme rather than about what produces the rats, and the two are related but not the same claim.⁴

9.1 From inside the programme rather than outside it

Which is the kind of source our other articles have found most useful.⁴

10. And the scale is not known

The same city is described as having somewhere between 16,000 and 40,000 vacant properties.⁵

10.0b The number matters for more than description

Any programme to secure or treat vacant property needs a count to budget against, and a figure uncertain by that margin cannot support one.

10.1 A range spanning a factor of two and a half

In a single clause, about a countable physical thing, in a city with a property register and an inspection department.

11. Which is our recurring finding

And by now an expected one.

This journal's articles on rat population estimates, on complaint data as a metric and on callback rates have each found the central number to be unmeasured, contested or measuring something other than what it names. This adds the denominator of the problem itself.

11.0b And the uncertainty runs the wrong way for policy

A programme sized against the low figure would cover less than half the problem if the high figure is right, and one sized against the high figure would be accused of waste if the low one is. Neither error is recoverable after the budget is set.

11.1 The difference here is that it is countable

A rat population is genuinely hard to census. Buildings stand still.

That contrast is ours.

12. What accumulates on the site

Beyond the structure itself.

Vacant properties are described as often subject to illegal dumping, leaving behind piles of waste, with these conditions creating habitat for rodents.⁴ Nuisance properties are also described as fire and flooding hazards attracting illegal scrapping, squatters and rodents.⁵

12.0b Dumping is the connection between the two problems

A vacant building supplies harbourage and the dumping it attracts supplies food, which is the combination our other rodent articles identify as the one that sustains a population rather than merely sheltering one.

12.1 With the dumping measured where the buildings are not

One city's complaint system recorded 13,404 reports of illegal dumping in a year, described as about 2,000 more than the previous year and more than the two years before that combined.⁴

12.1b And the direction of the trend is the usable part

A count that is wrong in a consistent way still shows movement, which is why the year-on-year comparison in our sources is worth more than the absolute figure.⁴

12.2 Which is a complaint count and carries all the problems we have described

Our article on sighting metrics argued that a report measures reporting as much as it measures conditions, and that applies here.

13. The neighbour's position

Stated by one.

A resident living alongside vacant homes: The biggest problem is the rats and the trash, and the city doesn't want to tear them down or clean them up.⁶

13.0b And the route of last resort is political

One state legislator wrote to a city health department's pest control bureau asking it to inspect a vacant property described as a rodent infested dumping ground, in response to numerous constituent complaints reporting increases in rats and raccoons in the surrounding neighbourhood.⁸

13.0c Which tells you the ordinary route had not worked

A complaint system exists precisely so that an individual property does not need an elected representative to write a letter about it.

That inference is ours, and we note the source is the legislator's own office rather than an independent account.⁸

13.1 With the mechanism described plainly elsewhere in the same piece

That illegal dumping attracts rodents, which aren't picky about whose trash they invade.⁶

14. Which is the structure we keep finding

Our generalisation.

The person paying for pest control can treat their own property and cannot treat the source. Our article on multi-unit buildings found it across a party wall, our article on wildlife exclusion found it at a property line, and this is the same shape with an additional feature: there is nobody on the other side to negotiate with.

14.0b And the asymmetry is worse than a party wall case

A neighbour in an occupied building can be persuaded, pressured, or taken to a landlord. An empty building cannot be persuaded of anything, and the complaint route in §4 leads into the chain that §6 says has no end.

14.0c And it is the reason the problem persists across decades

An externality that nobody can internalise does not resolve through anyone acting rationally, and every party in this article behaves sensibly given what they face: the neighbour treats their own building, the city prioritises what it can enforce, and the absent owner does nothing because they are absent.

14.1 So the money buys suppression rather than resolution

A service that must continue because the thing producing the problem is untouched, which is the recurring service our economics articles keep describing.

15. Demolition as the obvious answer

And it is what residents ask for.

Section 13 records a resident asking why the city will not tear the buildings down.⁶

15.1 And cities pursue it at scale

One city declared a blight emergency in 2013, a declaration described as lifting licensing requirements for demolition contractors and making the city eligible for more federal funds.⁵

15.2 Which is demolition capacity being expanded deliberately

And on the account in §16, an expansion of the dispersal events as well.

16. And why it is not one

A trade account: when a deserted house is demolished the structure may disappear but the rodent problem does not, and demolition often triggers a sudden surge in rat activity in surrounding areas, with animals following familiar travel routes like fences and utility lines and spreading the problem outward.⁷

16.0b The mechanism proposed is plausible on our own evidence

Our article on rodent spatial behaviour described animals using established runs along edges, and our exclusion article described how readily they move between adjoining structures. An abrupt loss of harbourage acting on animals with known routes is consistent with both.⁷

16.1 Stated more bluntly by another

When a vacant structure is demolished the rodents explode out into the surrounding neighborhood.¹

16.1b And the one in §17 is a regulation resting on the same premise

Which is not independent evidence, since a rule can be written on a belief, but it does mean at least one regulator was persuaded of it.¹

16.2 Both are trade sources

Selling the service the claim implies, which §29 records.

17. The requirement that treats it properly

If a project will include clearing, grading or demolition, a pest control professional licensed by the state agriculture department must inspect the property.¹

17.1 The trigger is the work, not the building

Clearing and grading appear alongside demolition, so a site being levelled without any structure on it falls within the requirement too.¹

18. Fifteen days

The interval specified.

Where evidence is found, an abatement plan must start at least fifteen days before work begins and extend up to the planned demolition date.¹

18.0b And the interval is doing specific work

Baiting takes time to reduce a population, and a plan begun on the morning of the demolition would satisfy the letter of an obligation while achieving nothing. Fifteen days is an attempt to make the requirement bite.

That reading is ours; the source states the interval without explaining it.¹

18.1 Which is a period rather than a treatment

The rule specifies when the work starts and how long it runs, not what is applied, which leaves the method to the licensee and is the same structure our articles on performance-based regulation have described favourably.

18.1b Which we would note as a design worth copying

A rule that specifies timing and leaves method open puts the judgement with the person who has the licence, and our certification article argued that this is the only place such judgement can usefully sit.

18.2 And it is proportionate

An inspection finding no evidence ends the obligation, so the cost falls only where the condition exists.¹

19. The detail worth noticing

In the list of what counts as evidence.

Droppings, nesting, skeletons and old bait boxes.¹

19.0b And skeletons on the same list

Which are evidence that a population lived and died there, and which will persist far longer than droppings in a building open to weather.¹

19.1 Previous control effort as evidence of infestation

Which is a neat piece of drafting, since somebody placed those boxes because there were rodents, and a vacant property retains the evidence of its last occupant's problem.¹

19.1b The list is written for a building nobody has entered in years

Each item survives without an occupant: droppings persist, nests persist, skeletons persist, and bait boxes persist longest of all. An evidence standard built around live sightings would find nothing in the places this rule is aimed at.¹

19.2 And it closes a gap

A property baited into apparent quiet before being abandoned would otherwise show little current sign.

That reading is ours.

20. What makes this rule unusual

And it is why we wrote the article.

Almost all pest control is bought by somebody with a problem. This is pest work required on a property with no occupant, no complaint and no beneficiary except the neighbours, triggered by an event rather than by a condition anybody reported.

20.0b Which is a different regulatory target from anything else in this journal

Our other regulation articles examined rules binding applicators, products or occupiers. This one binds a project.

20.1 The obligation attaches to the demolition

Which means it attaches to whoever is doing the demolition, and that person exists, is findable, and needs a permit.¹

20.1b And the licence requirement gives it teeth

The inspection must be done by somebody licensed by a state agriculture department, which means the finding of evidence is made by a person with something to lose and a record that can be checked.¹

20.2 Which is how it routes around §6

The enforcement problem with a vacant property is that there is nobody to serve. A demolition has a contractor.

Both are ours.

21. And what it implies about ordinary practice

An implication the rule does not state.

If demolition disperses rodents into neighbouring properties badly enough to warrant a legal requirement, then so do the smaller versions: a gutting, a major renovation, a building cleared and sealed, an encampment cleared.

21.0b The common feature is abrupt loss of harbourage

Which is what §16 identifies as the driver, and nothing in that mechanism requires the building to come down entirely.

21.1 None of which we found regulated

Only clearing, grading and demolition are named in the requirement we read.¹

21.2 And our own work includes such events

Which §27 addresses.

22. The historical argument

Made by a researcher quoted in one of our sources.

Neglected neighbourhoods can often be traced back to segregation and redlining, when banks and insurance companies rejected investment and lending in nonwhite communities, which the researcher says would have made it nearly impossible for residents to get a loan to buy or keep up a home in an affected neighbourhood.⁴

22.1 The claim is about who could maintain a property

Not directly about rodents, and the connection runs through the ability to repair, insure and sell a house, which is what determines whether it becomes vacant.⁴

23. Which we report rather than endorse

For two reasons.

It reaches us as a researcher's summary in a newspaper rather than as a study we have read, and it concerns a history in another country whose particulars we are not equipped to assess.⁴

23.0b And we note what the claim is not

It is an account of how a housing stock came to be neglected, not a claim about rodent biology, and it competes with no biological explanation because it addresses a different question.⁴

23.1 What we can say is that it fits a pattern this journal has documented

Our article on the federal rat control programme found a control effort organised around housing conditions, funded categorically, and dissolved when funding became discretionary. Both accounts locate rodent problems in the history of property rather than in the biology of rats.

23.2 And the practical implication is the same either way

Whatever produced a concentration of vacant buildings, the pest consequence and the enforcement gap are as described in §§6 to 14.

24. What it would take to fix

Our assessment, offered without confidence.

The obligation would have to attach to something that exists. A demolition contractor exists. A municipal receiver exists. A tax sale purchaser exists. A deceased owner with no will does not.

24.0b And the second-best answer is the one in §17

If the obligation cannot be attached to the property, attach it to whatever transaction eventually touches the property, of which demolition is one and sale, transfer and permitted renovation are others.

24.1 Which makes this a property law problem wearing pest control clothes

And our licensing articles found the same thing in a different register, where the binding instrument was a document and the question was who it bound.

25. And why nobody does

The straightforward reason.

Treating a vacant property costs money and produces no revenue, and the benefit accrues to neighbours rather than to whoever pays.

25.0b And the amounts are not small

Treating and securing tens of thousands of properties is a programme rather than a line item, which is the same scale problem our article on the federal rat control programme found dissolving when the funding became discretionary.

25.1 Which is the definition of the thing municipalities exist to do

And which our article on containerization found a city doing successfully in a different domain.

26. What we would tell a client next door

Three things.

Your treatment is suppression, not resolution. Section 14.1.

Exclusion is worth more here than anywhere else. Because the pressure is continuous and the source is not going to stop producing.

And if the building is scheduled for demolition, say so. Section 16 is the reason that date matters to you.¹⁷

26.1 And one thing we would not promise

That the problem will end, since §14 says the source is outside anybody's reach and nothing we apply to one property changes what the next one is producing.

26.2 And one thing worth doing that costs nothing

Filing the complaint in §4, since a documented history of reports is the only thing that gives a municipality anything to act on, and our sighting-metric article found that recorded complaints are what municipal programmes are actually measured by.²

27. Our own position

The disclosure, and it is not comfortable.

Section 16 is a claim made by two companies that sell pre-demolition abatement, and we are a company that would sell it too. It is also the basis of a legal requirement in at least one jurisdiction, which is better support than a trade claim usually has.¹

27.0b And an article recommending pre-demolition work is an article recommending our trade

Which we would want a reader to weigh against §29, where the evidence for the underlying claim is set out and is thin.

27.1 And §21 describes work we do without such a requirement

We have sealed and cleared buildings without treating first, on jobs where nobody asked, and §21's argument applies to those.

28. The Manitoba position

28.1 The scale is different

This province does not have vacancy at the concentrations the American cities in our sources describe, and nothing here should be read as claiming otherwise.

28.1b Which does not make the question irrelevant here

Demolition and clearing happen in every city, and the mechanism in §16 does not depend on how many vacant buildings a place has.

28.2 What we could not find

Any Manitoba or Winnipeg requirement for rodent abatement before demolition, any local vacant building count, and any Canadian study of vacancy and rodent complaints.

28.3 And the local variable is different

A building empty through a winter here is a building whose heat is off, which changes what can overwinter in it, and we found nothing addressing that either.

29. Limitations and open questions

There is no research literature in this article. Every source is a newspaper, a municipal web page, a trade page or a political press release, and none of the causal claims here has been tested in anything we read.¹⁴⁵⁷

That is the most important limitation and it is worse than usual for this journal, because the central mechanism, that demolition disperses rodents into neighbouring properties, reaches us only from companies selling the remedy and from a rule that presupposes it.¹⁷

We did not read the regulation itself. The demolition requirement is described by a pest control company summarising a municipal rule, and we did not locate the ordinance, confirm which jurisdictions it covers, or check whether it is current. Every specific in §§17 to 20 carries that caveat.¹

No association has been quantified. We have officials calling vacancy a major hurdle and residents describing the consequence, and no study relating vacant property density to rodent complaints, infestation rates or treatment costs.⁴

The vacancy figures are an estimate range in a news feature. Section 10 reports it as an illustration of uncertainty and it should not be treated as a measurement.⁵

The code material is from one county. Which we use to illustrate a structure rather than to describe how any particular place operates, and other jurisdictions will differ.²³

Sections 6, 8, 11, 14, 19.2, 20, 21, 24 and 25 are our reasoning. The argument that the enforcement chain assumes a reachable owner, the observation that buildings are countable in a way rat populations are not, the account of why the demolition rule succeeds where harbourage enforcement fails, and the extension to renovation and clearing work are ours rather than sourced positions.

30. Conclusion

Municipal codes make each property owner responsible for rat harbourage, state plainly that an infestation at one location may spread to adjacent properties, and provide a route by which anyone may complain about a neighbouring address.² What follows is an inspection, a correction notice with a compliance date, a citation, and a hearing before a judge.³ Every one of those steps addresses an owner. A vacancy that began with the death of an elderly homeowner leaving no family and no will has nobody at the end of that chain, and neither does one produced by tax foreclosure in a city with more abandoned property than it can process.⁵⁶ The official running one city's rat programme named vacant buildings as among the biggest hurdles to controlling its rats, and how many that city has is given as somewhere between sixteen and forty thousand.⁴⁵

So the cost falls on the neighbours, who can treat their own property and cannot treat the source, and whose service therefore buys suppression rather than resolution. Demolition looks like the answer and residents ask for it, but the structure is what disappears and the animals leave along fences and utility lines into the properties around it.⁶⁷ That claim comes to us from companies that sell the remedy, which we record as a weakness, though it is also the premise of a legal requirement: where a project involves clearing, grading or demolition, a licensed inspection is required, and if evidence is found, including old bait boxes left from an earlier problem, an abatement plan must begin at least fifteen days before work and run to the demolition date.¹

That rule is the most interesting thing we found, because it solves the problem in §6 by not trying to. It does not look for an owner. It attaches the obligation to an event that has a permit applicant, a schedule and a contractor, all of whom exist and can be found. Pest work is required on a building with no occupant, no complaint and no beneficiary except the people next door. Whether the same logic should extend to gutting, sealing and clearing work, which we do routinely and without any such requirement, is a question the rule raises and does not answer. And this whole article rests on news and trade sources rather than on evidence, which we would rather state at the end as well as the beginning.

References

1. Frequently asked questions page on rat abatement for demolition, published by a pest control company describing a municipal requirement in a western American county. Trade material summarising a regulation we did not read in its original form, which we flag because several specifics in this article rest on it. Source for the statement that a project including clearing, grading or demolition must have a pest control professional licensed by the state agriculture department inspect the property; for the requirement that where evidence of rodent activity is found, including droppings, nesting, skeletons and old bait boxes, an abatement plan must start at least fifteen days prior to beginning work and extend up to the planned date of demolition; for the statement that no evidence found means no plan is required; and for the assertion that when a vacant structure is demolished the rodents explode out into the surrounding neighbourhood, offered alongside a remark about increasing density in the counties concerned. https://www.parkerecopestcontrol.com/2019/01/14/rat-abatement-for-demolitions-city-requirements-and-faqs/
2. Rat control and treatment programme page published by an American county government. Official municipal material. Source for the statement that the programme enforces county regulations addressing the root causes of rodent infestation; for the statement that rats are a community problem that must be addressed by all residents and that when an infestation exists at one location it may easily spread to adjacent properties; for the code provision that each resident is responsible for keeping their property free of rat harbourage; for the complaint route allowing reports of rats on another property or of a property with conditions conducive to rats, requiring the exact address; and for the account that many infestations are resolved through educational material and code enforcement without neighbourhood-wide extermination, with treatment where required performed by a licensed company and signs posted in advance. https://www.baltimorecountymd.gov/departments/pai/code-enforcement/rats
3. Code enforcement page published by the same county government. Official municipal material. Source for the description of the enforcement sequence: that a code case is a complaint potentially violating the county code or zoning regulations, that a correction notice follows an inspector affirming a violation needs correction, that each correction notice carries a compliance date varying depending on the code, and that a citation notifies the owner they have not brought the property into compliance and will have to attend a hearing with the administrative law judge office. https://www.baltimorecountymd.gov/departments/pai/code-enforcement
4. Newspaper feature on rat abatement calls in an American city, reporting an analysis of the city's complaint system and quoting municipal officials and an academic researcher. News material. Source for the statement by the official overseeing the city's rat programme, as chief of property management in its solid waste bureau, that vacant buildings are one of the biggest hurdles to controlling the city's rats; for the account of residents deriding the city over blocks full of abandoned properties often subject to illegal dumping leaving piles of waste, with these conditions creating habitat for rodents; for the figure of 13,404 reports of illegal dumping recorded through mid-December of the year in question, described as about 2,000 more than the previous year, 2,500 more than the year before that and more than the two preceding years combined, with reports of vacant buildings highest in an earlier year at 8,280; for the statement that illegal dumping, improper disposal of household trash and leaving trash out on non-collection days pose challenges for exterminators as sources of rat shelter and food; and for the quoted researcher's argument that neglected neighbourhoods can often be traced back to segregation and redlining when banks and insurance companies rejected investment and lending in nonwhite communities, making it nearly impossible for residents to obtain loans to buy or maintain homes in affected areas. https://www.baltimoresun.com/2022/01/03/311-calls-for-rat-abatement-in-baltimore-up-in-2021-experts-exterminators-point-to-same-solutions-to-control-rodents/
5. Feature article on nuisance property enforcement in two American cities, published by an urban affairs news organisation. News material with an advocacy orientation. Source for the estimate that one of the cities has somewhere between 16,000 and 40,000 vacant properties largely concentrated in particular neighbourhoods; for the statement that nuisance properties are fire and flooding hazards attracting illegal scrapping, squatters and rodents; and for the account of the other city's situation as decades of depopulation and deindustrialisation compounded by recent massive waves of mortgage and tax foreclosure, with a blight emergency declared in 2013 that lifted licensing requirements for demolition contractors and opened access to federal funds. https://nextcity.org/urbanist-news/baltimore-detroit-blight-vacant-houses-nuisance-abatement
6. Local news feature on the impact of vacant properties in an American city, including resident interviews. News material. Source for the account that vacant homes affect neighbours through water damage from unrepaired roofs spreading to adjoining houses, mould in shared walls, and illegal dumping attracting rodents which are not particular about whose trash they invade; for the quoted resident's statement that the biggest problem is the rats and the trash and that the city will not tear the vacant buildings down or clean them up; and for the observation that each vacant house has its own story, with some beginning in the passing of an elderly homeowner leaving no family to take over the property and no will in place to designate ownership. https://baltimorefishbowl.com/stories/rot-and-renewal-the-impact-of-vacant-properties-in-baltimore/
7. Blog article on house demolition and rodent dispersal, published by a Canadian pest control company. Trade marketing material for the service the claim implies, cited as attributed material. Source for the statement that when a deserted house is demolished the structure may disappear but the rodent problem does not, and that demolition often triggers a sudden surge in rat activity in surrounding areas; for the account that vacant homes provide ideal shelter with no human disturbance, easy entry points and nesting areas in walls, basements and insulation; for the statement that demolition destroys the habitat and forces animals to flee immediately, following familiar travel routes like fences and utility lines and spreading the problem outward; and for the recommendation that the most effective way to prevent spread is to control the population before demolition begins through baiting, trapping and monitoring of both the property and surrounding areas, with continued monitoring afterwards since animals may remain in the soil or nearby structures. https://gogreenpestcontrol.ca/house-demolition-like-rats-fleeing-a-sinking-ship/
8. Press release from a state legislator calling for inspection of a deteriorated property. Political press material, cited as an illustration of how such matters are raised rather than as evidence. Source for the account of a legislator writing to a city health department's pest control bureau asking it to inspect a vacant property described as a rodent infested dumping ground, in response to numerous constituent complaints reporting an increase in rodents including rats and raccoons in the surrounding neighbourhood. https://assembly.ny.gov/mem/Jeffrey-Dinowitz/story/56078