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Demolition With Asbestos: Ontario Rules, Steps and Costs

By HMJ Contracting · Ottawa, ON

Contained room prepared for asbestos abatement

You can demolish a building that contains asbestos, but not by knocking it down first and sorting it out later. In Ontario, the asbestos that could be disturbed has to come out before demolition proceeds, and the owner needs a survey, a permit and a licensed crew in the right order. This guide walks Ottawa-area owners through that order, what each step involves and what the work typically costs.

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TL;DR

  • Ontario’s asbestos regulation requires asbestos-containing material that may be disturbed to be removed to the extent practicable before demolition proceeds.
  • Before you tender or contract demolition, you need an examination and a written report on where the material is, its condition and whether it is friable.
  • Ottawa requires a building permit for demolition, with clearances from the appropriate authorities.
  • If you suspect asbestos mid-job, stop work, secure the area and bring in a qualified professional before anyone continues.
  • On our published ranges, testing runs $300 to $600, small abatement jobs $1,500 to $3,500, and a full interior strip-out $4,000 to $15,000.

Table of Contents

Can you tear down a building that contains asbestos?

Yes. Asbestos does not stop a demolition. It changes the sequence. The material has to be identified first, removed or controlled by people trained to do it, and only then can the structure come down.

The reason is simple. Asbestos is dangerous when fibres become airborne, and demolition is about the most effective way to make them airborne. Government of Alberta guidance notes that asbestos-related illnesses typically have a latency period of at least 10 years, so workers and neighbours may feel nothing for a long time after being exposed. Careful control up front is the whole point.

If your home or building was built before the mid-1980s, assume asbestos could be somewhere in it until a test says otherwise. Common places include insulation, vermiculite in attics, old flooring, plaster and ceiling texture. Our guide on testing before you tear anything out covers the usual suspects in Ottawa homes.

What the rules say in Ontario

In Ontario, asbestos on construction projects is governed by O. Reg. 278/05. Two requirements matter most to a demolition.

Removal before demolition. The regulation says demolition proceeds only after asbestos-containing material that may be disturbed has been removed to the extent practicable.

An examination and report before contracting. Before tendering or contracting for demolition work, the building owner must have an examination done to identify asbestos-containing materials. The owner prepares a report setting out where the material is, its condition and whether it is friable or non-friable, and gives that report to any prospective constructor, per the same regulation.

Three details in an Ontario asbestos report

That second rule catches many owners off guard. The report is not something the demolition contractor creates for you after you sign. It comes first, and it is part of how contractors price the job accurately.

Owners also have a duty to tell people. In Ontario, building owners must give written notice to any occupier, and to employees and contractors working in the building, about identified asbestos-containing material in areas where they may be working. The record of identified material also has to be kept current: the same document describes updating it at reasonable intervals, specifically every twelve months, or whenever new information becomes available.

For a deeper look at how the regulation affects disposal and fines, see our article on Ottawa asbestos disposal rules under O. Reg. 278/05.

How other provinces differ

If you own property outside Ontario, do not assume the same rules apply. Requirements are set province by province, and some include details Ontario does not highlight.

The Ottawa demolition permit

Separate from the asbestos rules, the City of Ottawa requires a building permit to demolish a structure. The application includes a Demolition Permit Application and a Demolition Permit Clearances Form authorized by the appropriate authorities. Clearances typically involve utilities being disconnected, which is one reason timelines stretch if you start late.

Check the City’s page for the current forms and fees before you apply. We also explain who handles what between owners and contractors in our article on the Ottawa demolition permit.

Step 1: Find out what is in the building

This is the step owners most often skip, and it is the one that sets the price, the schedule and the legal exposure of everything that follows.

WorkSafeBC makes the principle plain: building materials cannot be visually identified as asbestos-free, so owners and employers should never make assumptions and should get a professional survey by a qualified inspector whenever demolition is planned. That guidance is from British Columbia, but the logic holds anywhere: you cannot spot asbestos by looking.

A survey does three things:

  1. It samples suspect materials and sends them to a lab for analysis.
  2. It records where each material is, how much there is and its condition.
  3. It classifies each material as friable or non-friable, which drives how it must be handled.

That is exactly the information Ontario’s regulation says must be in your report to prospective contractors. A designated substance survey is also what environmental consultants routinely recommend before future renovation or demolition, as a 2024 Phase I Environmental Site Assessment filed with the City of Ottawa did for its subject building.

A home inspection is not a substitute. Inspectors look at condition, not hidden material content, which we explain in why a home inspection often won’t find asbestos.

The survey also matters if you plan to sell. What you know about asbestos feeds into what you must disclose, and the seller disclosure requirements in Ontario are worth reading before you list a property you have tested or renovated.

What testing costs

Our published range for testing and lab analysis is $300 to $600. The final figure depends on how many samples the building needs. That is small next to the cost of a demolition that has to stop halfway because someone found material nobody had tested.

Step 2: Remove the asbestos before the structure comes down

Once the survey lists what is there, a licensed abatement contractor removes the material that could be disturbed. Work follows a set of controls that are broadly consistent across provinces:

  • Preparation of the work area: sealing off the space and posting warnings.
  • Dust control: keeping materials wet and avoiding methods that crush or break them.
  • Protective equipment: fit-tested respirators and protective clothing for workers. Even for bulk sampling, Manitoba’s guide calls for a fit-tested NIOSH-approved respirator and lightly misting suspect materials with water to prevent fibre release.
  • Clean-up: careful cleaning of the work area and controlled waste removal.

The Quebec guidance that ranks for this topic notes one exception worth knowing: negative air is not required where a building will be demolished and entered only by the workers involved in the demolition. That is a Quebec rule, not an Ontario one, so rely on your contractor and the Ontario regulation for what applies to you.

For a full walk-through of how a licensed crew runs this stage, see our article on the asbestos abatement process.

Step 3: Waste, records and clearance

Asbestos waste cannot go into a regular bin or onto a regular truck. The details differ by province, but the pattern is the same.

In Ontario, ask your contractor which approved facility will take the waste and for documentation of the disposal. Keep it with your survey report.

Clearance is the last gate. In British Columbia, a qualified person must certify that the worksite air is safe before the project is considered complete. Whatever the province, a documented clearance protects you if a buyer, lender, insurer or neighbour asks questions later. Commercial owners in particular should read our list of records to demand before abatement work.

What demolition with asbestos costs in Ottawa

Cost depends on how much material there is, where it is and how much of the building you are taking down. These are our published ranges for Ottawa-area work, and a written quote after an on-site look sets the real number.

Service Published range
Testing and lab analysis $300 to $600
Small Type 1 or 2 abatement jobs $1,500 to $3,500
Vermiculite attic removal $5,000 to $15,000
Single-room strip-out $1,000 to $4,000
Full interior strip-out $4,000 to $15,000
Structural openings $2,500 to $10,000

Whole-home or Type 3 abatement has no published price, because it depends too much on the building. We quote it after an assessment.

The practical lesson is to budget abatement and demolition together. A quote for demolition alone that ignores asbestos is not a lower price. It is an incomplete one. Our estimates are itemized line by line so you can see what is abatement, what is demolition and what is hauling.

What demolition with asbestos costs in Ottawa

If you find suspect material after work has started

This happens often: a wall opens up and there is something that looks like old insulation, or a floor lifts and shows black mastic. The guidance is consistent. WorkSafeBC’s safe work practices say that work must stop immediately, the area must be secured, and a qualified asbestos professional must inspect, sample and confirm before anything continues. If asbestos is confirmed, a certified abatement professional handles it following all regulatory procedures, and only then can work resume.

In practice:

  1. Stop work and have everyone leave the area.
  2. Do not sweep, vacuum or try to clean up the debris.
  3. Close off the space and keep other people and pets out.
  4. Call a licensed abatement contractor to sample and assess.

Our six-step approach to renovating with asbestos goes into the test, contain and clear sequence in more detail, and how asbestos affects renovation plans covers the schedule impact.

Old vinyl flooring and other surprises

Owners often ask whether old vinyl flooring can contain asbestos. It can, and so can the mastic (adhesive) underneath. WorkSafeBC’s guidelines say such flooring should be treated as asbestos-containing unless testing proves otherwise. Have a qualified professional survey it before you disturb it, and if asbestos is confirmed, follow safe removal procedures that avoid breaking the material up and releasing dust.

This is why “I’ll just pull up the old floor before the demolition crew arrives” is one of the more expensive ideas in a teardown. Removing it yourself can contaminate the whole house and turn a contained job into a larger one.

Our perspective: sequence is everything

We see the same pattern on older Ottawa properties. The owner has a demolition date in mind, a contractor has quoted the teardown, and nobody has tested anything. Then a wall opens and the whole project stops.

Our view is simple: test first, remove what the report lists, then demolish. That order is what the regulation expects, and it is also the cheapest way to do the job, because there are no surprises to price in after the fact.

It is also why we handle abatement, demolition and renovation under one roof. When the crew that removes the asbestos is the crew that coordinates the strip-out, the hauling and the permit paperwork, there is no gap where responsibility falls between trades. You get one itemized quote, one schedule and one set of post-job documents.

With more than 25 years working in the Ottawa area, we would rather spend an hour explaining the sequence at your property than have you find out the hard way.

Jason

Get a quote for the whole job

If you are planning a teardown, a gut renovation or a major opening in an older Ottawa building, we can test, abate and demolish under one contract, with permit management, debris hauling and post-job documentation included in the scope. We aim to return estimates within 24 hours, and each quote is itemized line by line.

Hmjcontracting

Start with our asbestos abatement services or our demolition and strip-out services, or contact us through hmjcontracting.com for a free estimate. Clearing out before the work starts? Our guide to junk removal before a renovation helps you plan it.

FAQ

Do I need a permit to demolish a house with asbestos in Ottawa?

Yes. The City of Ottawa requires a building permit for demolition, including a Demolition Permit Application and a clearances form authorized by the appropriate authorities. The asbestos survey and removal are separate obligations under Ontario’s regulation, not a replacement for the permit.

Who is responsible for the asbestos report before demolition?

The building owner. Under O. Reg. 278/05, the owner must have the material identified before tendering or contracting for demolition and must give a report to any prospective constructor. A qualified surveyor normally prepares it.

Can I remove asbestos myself before demolition?

We do not recommend it. Removal involves containment, fit-tested respirators, dust control and approved waste handling, and one mistake can spread fibres through the whole building. For anything beyond a test sample, hire a licensed abatement contractor and ask for the disposal documentation.

What happens if asbestos is found after demolition starts?

Work stops, the area is secured and a qualified professional samples the material. If asbestos is confirmed, a certified abatement crew removes it before work resumes. Starting with a survey avoids this delay.

Sources

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