Emergency demolition in Calgary

When Do You Need Emergency Demolition? Warning Signs to Watch For

You can hardly ever plan for the aftermath of a serious building emergency. One moment, a property is standing as usual; the next, a fire, severe storm or vehicle impact has damaged the structure. Once the immediate danger has passed, there is still the question of what can safely remain and what needs to be dealt with.

 

For property owners dealing with this situation in Calgary, the answer depends on the extent of the damage and the condition of the remaining structure. Sometimes the structure can be repaired, and in other cases, emergency demolition may be necessary. 

 

The challenge is knowing when the damage has become serious enough to require immediate professional attention. In this blog, we’ll look at the warning signs that may indicate you need emergency demolition.

7 Signs Your Property May Need Emergency Demolition

Serious damage does not always mean an entire building needs to be demolished. However, certain changes can indicate that the structure has become unstable or that a damaged section may no longer be safe to leave in place.

 

The following warning signs are worth taking seriously, especially when they appear after a fire, collapse, severe storm, vehicle impact or other major incident.

1. Partial Building Collapse

A partially collapsed roof, floor or wall is one of the clearest signs of serious structural damage.

 

Even when only one section has collapsed, the remaining parts of the building may have been affected. The failure can change how weight is distributed across walls, beams, floors and other structural components. Look for:

  • A roof section that has fallen inward
  • A floor that has partially given way
  • A wall that has collapsed or moved significantly
  • Ceiling sections that have fallen after a major incident
  • An attached garage or other structure that has partially collapsed

Do not enter the damaged area to determine how much of the building is affected. A structure that is still standing may not be stable.

2. Walls Are Leaning, Bowing Or Separating

A wall that suddenly starts leaning, bowing or separating from the rest of the building can indicate that it has lost structural support. You may notice:

  • Large cracks appearing in or around the wall
  • Gaps between the wall and ceiling
  • Separation between adjoining walls
  • A wall that appears to be moving outward
  • Doors or windows becoming difficult to operate after a major incident

These changes can be particularly concerning when they appear after a fire, vehicle impact, collapse or severe weather event. The wall should not be pushed, removed or otherwise disturbed before its condition has been assessed.

3. Structural Damage After A Fire

A building does not need to be completely destroyed by fire to have serious structural damage.

 

High temperatures can weaken framing, roof components, floors and the connections between structural elements. Firefighting water can create additional problems, particularly when materials have already been weakened by heat.

 

Heavy charring, sagging ceilings, damaged roof sections, shifted walls and exposed supports can indicate that the fire affected the building’s structure. An unstable floor or visibly damaged framing is another reason for an assessment. Some fire-damaged buildings can be repaired, while others may require selective or partial demolition.

4. Sudden Roof Or Floor Sagging

A roof or floor that suddenly develops a noticeable dip can indicate damage to the framing or the components supporting it. Fire can weaken structural framing. Water from firefighting, flooding or a damaged roof can add weight to weakened materials. A vehicle impact or partial collapse can also affect the supports carrying a roof or floor. 

 

Some signs are easy to spot:

  • A visible dip or sag
  • New cracks around ceilings or walls
  • Exposed or damaged framing
  • Floors that have become uneven
  • Materials pulling away from their connections

Avoid walking on visibly damaged floors or standing beneath severely damaged roof sections until they have been assessed.

5. Severe Storm Damage Has Left The Structure Unstable

Severe weather can damage roofs, exterior walls, windows, garages and other structural components. In more serious cases, wind, hail, flooding, or fallen trees can leave parts of a property unsafe. 

 

The City of Calgary advises property owners with structural damage to hire a structural engineer and, if demolition is required, work with a demolition or general contractor to address permits, asbestos requirements, utility disconnections, and inspections.

 

The important point is that storm damage should not automatically be treated as a demolition problem. The condition of the structure needs to be assessed first.

6. Vehicle or External Impact Has Damaged A Structural Area

A vehicle collision can damage an exterior wall, support, garage, storefront, or another structural component. The visible damage may not show the full extent of the impact.

 

If the collision has affected the stability of the building, the damaged area may need to be secured, assessed, repaired, or removed. The appropriate response depends on the extent of the damage and the condition of the remaining structure.

7. Building Has Been Determined To Be Unsafe

A building can become unsafe due to fire, structural deterioration, collapse or other serious damage. An unsafe designation does not automatically mean the entire building must be demolished. 

 

The appropriate response depends on the reason for the designation and the condition of the property. If authorities determine that a property cannot be safely occupied, the owner needs to follow the applicable instructions before allowing anyone back inside or starting work.

What Should You Do in the First Hour After Serious Building Damage?

In the first hour after serious building damage, the first priority is safety. All people must evacuate the building, move to a safe space and call demolition services if there is a risk of fire, gas leaks, or collapse. 

 

Here is a list of things that you should keep in mind in case of emergency: 

1. Get Everyone Away From the Damaged Area

Move people away from the building and any areas that appear unstable. Do not enter a damaged structure to inspect it, collect belongings, or begin cleanup if there is a risk of collapse. 

 

It is advisable that people not enter damaged buildings or restricted areas until authorities declare them safe.

2. Do Not Try to Stabilize or Tear Down the Structure Yourself

A damaged structure can behave unpredictably when its weight or support is disturbed.

 

Trying to remove a damaged wall, roof section, or other structural component yourself can create additional risks. Stay outside the affected area and leave structural assessment and demolition work to qualified professionals.

3. Document the Damage From a Safe Location

If it is safe to do so, take photos or videos of the property before cleanup or demolition begins. Record the following things:

  • Visible damage
  • Damaged areas of the building
  • The approximate time of the incident
  • Damage to nearby property, where applicable
  • Any other details that may help document what happened

Keep this information with your other records in case it is needed for an insurance claim.

4. Contact Your Insurance Provider

If the damage may result in an insurance claim, notify your insurer and ask what information or documentation they require. Avoid assuming that every demolition cost will be covered. Insurance coverage depends on the policy and circumstances of the loss.

5. Contact an Emergency Demolition Contractor

Once the immediate emergency is under control, a demolition contractor can assess the site and determine what demolition work may be required. The contractor can then help coordinate the demolition scope, site access, utilities, permits, and removal requirements based on the property.

What Happens After A Building Is Found Unsafe?

Finding serious damage does not always mean the building has to come down. The next step depends on how badly the building is damaged and whether it can be made safe again.

1. The Damage Is Checked

A professional will inspect the building and determine which areas have been damaged. This helps determine whether the property can be repaired or if some or all of it needs to be removed.

2. Unsafe Area Is Secured

If part of the building is unstable, people may need to stay away from the affected area. Access may be restricted until the building is safe to enter.

3. Utilities And Hazardous Materials Are Checked

Before work starts, gas, electricity and water may need to be disconnected or made safe. Older buildings may also need to be checked for asbestos or other hazardous materials.

4. Required Permits Are Obtained

Depending on the property and the work involved, permits may be required before demolition begins. Calgary’s demolition requirements can also involve utility disconnections, asbestos requirements and inspections. For a detailed guide to the demolition permit process, refer to the permit requirements here. 

5. Building Is Repaired Or Demolished

The condition of the building will determine what happens next. A damaged property may be repaired if the structure can be made safe. If only one part is badly damaged, that section may be removed. If the building cannot be safely repaired, complete demolition may be necessary.

6. Work Is Inspected

Once the work is finished, any required inspections can be completed to make sure the site meets the applicable requirements.

 

The important thing is to avoid assuming that serious damage automatically means full demolition. A proper assessment can show what needs to be removed and what, if anything, can safely remain.

How Much Does It Cost To Demolish a House?

In Calgary, an emergency demolition can typically cost around $15,000 to $50,000+ for a standard residential structure. The final cost depends on the property, extent of damage, site conditions, equipment requirements, and the amount of material that needs to be removed.

 

Emergency projects can also be harder to estimate at the beginning because the full condition of a damaged structure may not be known until it has been assessed. The overall cost of an emergency demolition in Calgary can be affected by the following factors:

  • Size and type of structure: A small detached structure will have different demolition requirements from a large residential, commercial, or multi-unit building.
  • Extent of damage: Removing one damaged section is different from demolishing most or all of a structure.
  • Site accessibility: Limited access for equipment and hauling can add complexity to the project.
  • Equipment requirements: The type of equipment required depends on the building and demolition method.
  • Hazardous materials: Asbestos assessment or abatement may be required before demolition can proceed.
  • Utility work: Required utility disconnections can involve additional coordination and fees.
  • Hauling and disposal: The amount and type of material removed will affect transportation and disposal requirements.

For a more detailed breakdown of demolition costs across different types of projects, see our guide to Calgary demolition costs in 2026. 

Conclusion

Emergency demolition may be necessary when sudden damage leaves a building or part of it unsafe to occupy, repair, or leave standing. Fire, structural damage, severe weather, and vehicle impacts are some situations that can lead to urgent demolition.

 

The right response starts with keeping people away from the damaged area and contacting emergency services when there is an immediate danger. 

 

If your property in Calgary has suffered serious damage and demolition may be required, Done Fast Demolition can assess the project and help you move forward with the required demolition work.

Yes. Fire damage does not automatically mean the entire building needs to be removed. Depending on the extent of the damage, demolition may be limited to burned or structurally compromised sections while other areas are retained.
Local government officials and building code authorities decide if a damaged building needs emergency demolition. They may need to assess the damage, while the demolition contractor determines the practical requirements for safely removing the affected structure.
Emergency demolition may need to be addressed within hours when a building has an active risk of collapse or poses a threat to people or public safety. A building that is unstable or at risk of further collapse should not be left unattended while waiting for routine repairs.

Extra care may be needed when a damaged building is close to another structure or shares a wall, foundation or other structural element. The condition and position of the neighbouring property may need to be considered before demolition or major repair work begins. Access, utilities and the risk of affecting the adjacent structure may also need to be addressed.

Once the damaged structure has been removed, the site may need to be cleared, inspected, and prepared for whatever comes next. Depending on the property, this could include further construction, rebuilding, restoration, or leaving the site ready for future work.
Keep photographs of the damage, insurance correspondence, contractor estimates and invoices, permits, inspection records, engineering reports, and documentation related to hazardous materials or utility work. These records can be useful for insurance, property records, and future rebuilding work.

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