Buying a flat is one of the biggest financial decisions you’ll make. When the Fire Risk Assessment (FRA) labels a property as having a substantial fire risk or intolerable risk, the stakes rise even higher. These ratings signal serious fire hazards that can affect safety, mortgage approval, insurance premiums, and long-term property value. Before signing a contract, buyers need clear property purchase advice to understand what these ratings mean, how much remedial works might cost, and whether to proceed with the purchase at all.
In this guide by Fire Safety Specialists Ltd, we explain what these fire risk ratings mean for buyers and how to make informed decisions before completing a purchase.
A Fire Risk Assessment (FRA) categorises properties into levels of risk, from tolerable to intolerable. A substantial fire risk means urgent safety actions are needed, while an intolerable risk indicates immediate danger that makes the flat unsafe until corrective works are done.
For buyers, these ratings bring consequences beyond safety. Mortgage lenders often reject applications for flats with poor FRA scores, and insurers may raise fire insurance premiums or even refuse coverage.
A poor fire risk rating can also reduce the property’s future value, making resale difficult. Understanding what an FRA rating means for your purchase is the first step toward making an informed decision.
You may also read: What Is a Fire Risk Assessment and Why Do You Need One?
Proceeding with a flat that carries a substantial or intolerable fire risk is never simple. Buyers must weigh the cost of remedial works, the chances of securing insurance, and the effect on future resale value.
An intolerable risk rating usually means you should not proceed until corrective works are completed. These flats are unsafe to occupy and may be unmortgageable or uninsurable until the hazards are resolved.
With a substantial fire risk, purchase may still be possible if you negotiate a lower price or the seller agrees to carry out the required works. In every case, seek professional fire safety advice before making a final decision.
Fire risk assessment costs for an individual flat are usually modest—typically between £250 and £750. However, the remedial works highlighted in an FRA can be far more expensive, sometimes running into tens of thousands of pounds.
Common remedial costs include:
Understanding these potential expenses early is essential when buying in a block with a substantial fire risk or intolerable risk rating. Always request a clear breakdown of the required remedial works from the seller or managing agent before committing to the purchase.
If a Fire Risk Assessment highlights a substantial fire risk, buyers are within their rights to negotiate a lower offer. Unresolved fire hazards directly impact safety, mortgage approval, and long-term property value, so sellers must disclose these risks during the sales process.
When negotiating, highlight the estimated cost of remedial works. Independent quotes for fire doors, alarms, or cladding repairs give you a stronger position and show the seller the real financial impact of the FRA findings.
In some cases, lenders may also require the purchase price to be reduced to reflect the cost of necessary safety upgrades. Treat the FRA as a useful bargaining tool rather than an obstacle, ensuring you protect both your finances and your future investment.
You may also read: When Is A Fire Risk Assessment Required For Flats?
Yes, buyers can request sellers to resolve fire safety issues before contracts are completed. Here’s how:
Taking these steps gives buyers greater protection and ensures that fire safety responsibilities are addressed before ownership changes. It’s a practical way to reduce risk and secure peace of mind during the purchase process.

Responsibility for remedial works depends on where the hazard is found. If the issue is inside an individual flat, the leaseholder usually pays. When problems affect common areas, costs are shared through service charges, with freeholders or managing agents arranging the contracts.
High-profile cases like unsafe cladding show how expensive these works can be. In some situations, government schemes or funding help reduce the burden on leaseholders, but this support is not always guaranteed.
Buyers should expect possible service charges or levies when purchasing in a block with unresolved fire safety risks. Factoring in these costs early helps avoid surprises and ensures the investment remains financially secure.
You may also read: How to Commission a Fire Risk Assessment When the Council Won’t Help
Insurers and lenders place significant weight on Fire Risk Assessment results. Flats with a substantial fire risk often face higher insurance premiums or limited coverage. For intolerable ratings, insurers may refuse cover altogether until remedial works are completed.
Mortgage lenders also take a strict approach. Loans on intolerable risk flats are usually declined, while substantial risk properties may require proof that remedial works are planned or completed before approval.
Buyers should factor these conditions into their affordability checks. A high-risk rating not only raises immediate costs but can also affect long-term financial security and the property’s resale potential.
When buying a flat with a substantial or intolerable fire risk rating, it’s important to take extra precautions before committing. These actions can help you make a safer and more informed decision.
Following these steps will give you clearer insight into the property’s true risks. They also provide leverage in negotiations or the confidence to walk away if the hazards remain unresolved.
Sometimes, the best choice for buyers is to step back. Purchasing a flat with an intolerable fire risk rating can expose you to years of uncertainty, spiralling costs, and disputes over liability for remedial works.
Safer alternatives include choosing flats with recent FRAs that show tolerable or moderate risks. These properties are more likely to be mortgageable, insurable, and financially stable in the long run.
Another option is to prioritise buildings where remedial works have already been completed. This reduces exposure to unexpected charges, provides peace of mind, and improves the property’s resale potential.
You may also read: Getting and Sharing Your Building’s Fire Risk Assessment
A substantial fire risk or intolerable risk rating should never be ignored. These ratings influence mortgage approval, insurance costs, and future resale value. Buyers must weigh the financial and safety implications carefully, seek professional advice, and negotiate firmly.
Proceeding with a property that carries a high fire risk rating is possible, but only with clear knowledge of remedial works, costs, and legal obligations. If risks are intolerable or unaffordable, walking away may be the wisest choice. Always put safety and long-term value above short-term deals.
A fire risk assessment is usually carried out every 12 months, with a more detailed review every 3–4 years. Regular checks help ensure that any new hazard is identified early, protecting both the block and the homeowner. For more detailed information please read: Fire Risk Assessment Frequency and What to Do If There Isn’t One
A report typically includes hazard identification, fire protection systems, escape routes, signage, and remedial actions. These elements give a clear picture of the property’s fire risk and outline what steps are needed to keep occupants safe.
The cost ranges from £500 to £2,500 depending on block size. Larger blocks or those in areas with higher wildfire risk may also consider external tools, such as First Street data, to assess long-term exposure and additional costs.
Yes. Severe fire damage can void insurance and make the property unmortgageable until repaired. In such cases, the homeowner faces both financial and safety challenges until remedial works are completed.
Yes. Insurers factor in both wildfire risk and structural fire risk when setting premiums. A higher risk of wildfire or unresolved building hazards often leads to increased costs or stricter terms for the homeowner.