Underwriting

How to underwrite a house with past fire damage

Underwriting a house with past fire damage requires a deeper dive into structural integrity and permitting than a typical property. Focus on identifying the extent of the damage, checking repair records, and accounting for hidden issues.

October 30, 2026 · 3 min read

Start with public records and preliminary assessment

Before you even set foot on the property, check public records for any fire department reports or building permits related to fire damage. This can give you an initial understanding of the incident's severity and whether any repairs were documented or permitted. Often, the city or county will have records of inspections or violations.

When you first walk through, look for obvious signs of structural compromise like bowing walls, sagging ceilings, or charred framing. Note any areas that look newly constructed or repaired in contrast to the rest of the house, as these could be spots where fire damage was addressed.

Focus on structural integrity

Fire can significantly weaken structural components like trusses, beams, and load-bearing walls, even if the charring is minimal. You need to assess if the structure can still support itself safely. This often requires bringing in a qualified structural engineer. Do not rely solely on visual inspection.

Heat can affect the temper of steel, even if not directly burned, and wood can lose significant strength. Pay close attention to the roof structure, floor joists, and foundation where the fire might have caused uneven loading or direct damage.

Investigate smoke and water damage beyond the obvious

Smoke can penetrate deep into materials, leaving persistent odors and discoloration that are difficult and expensive to remediate. Check HVAC systems, insulation, and all porous surfaces. Water damage, often from firefighting efforts, can lead to mold, rot, and further structural issues if not properly dried out and repaired.

Even if a superficial cleaning has been done, assume hidden smoke and water damage in walls, ceilings, and subfloors. Budget for full gutting of affected areas, professional smoke remediation, and mold removal. These are not minor cosmetic fixes.

Verify previous repairs and permitting

If repairs were made, request all documentation: permits, contractor invoices, and inspection reports. Verify that the work was permitted and passed final inspections. Unpermitted or shoddy repairs are common after a fire and can lead to major headaches and additional costs down the line.

If the seller cannot provide clear documentation, assume the worst and factor in the cost of bringing the repairs up to code, which might involve tearing out and redoing existing work. Your due diligence should include contacting the local building department to confirm any permits or open violations.

Estimate comprehensive repair and remediation costs

Your repair estimates must be more conservative than usual. Include costs for structural engineers, fire and smoke remediation specialists, mold remediation, and potentially new electrical and plumbing systems if they were compromised by heat or water. Do not forget disposal costs for hazardous materials.

Always add a larger contingency fund for unforeseen issues. A hypothetical example: if a typical rehab needs a 10% contingency, a fire-damaged property might need 20-30%. This is where the 70% rule often breaks; you might need to go lower. For more on this, check out /learn/arv-and-70-percent-rule.

Factor in increased insurance and holding costs

A property with a history of fire damage may be harder or more expensive to insure during your holding period, especially if repairs are extensive. Research this before making an offer.

Your holding costs might also increase due to longer repair times and the need for specialized contractors. This extended timeline affects your overall profitability. Account for every week the property will be sitting, unrepaired.

Questions people ask

Do I always need a structural engineer for fire damage?

For any significant fire damage, yes. Visual inspection alone is not enough to confirm structural integrity. An engineer's report protects your investment and ensures safety.

What if the seller says the fire was minor?

Even 'minor' fires can cause significant smoke damage or compromise electrical systems. Always conduct your own thorough inspection and due diligence, regardless of the seller's description.

Will fire damage show up on a title report?

Not directly. A title report focuses on liens and ownership. You'd find evidence in public building permit records, fire department reports, or potentially property tax assessments that reflect damage.