Why is a FENSA certificate important when selling your home?
Selling your home can feel like navigating a maze, and discovering you lack a FENSA certificate for your double glazing can add an unexpected twist. This common situation is certainly manageable, but it requires understanding the regulations and knowing the right steps to take.
6 minutes
14-07-2026
What is a FENSA Certificate and why is it important?
A FENSA certificate is an official document that confirms your replacement windows and doors meet current building regulations. FENSA stands for Fenestration Self-Assessment Scheme, and it is a government-authorised competent person scheme for the replacement of windows, doors, and rooflights in England and Wales.
When a homeowner replaces windows or doors, the installer must either be registered with a scheme like FENSA or the homeowner must apply for building control approval from their local authority. The certificate proves that the installation complies with thermal performance standards, safety requirements, and other building regulations.
This certificate is crucial because it provides assurance to future buyers that the work was carried out by a competent installer and meets legal standards. Without it, there is no official record of compliance, which can raise concerns during the conveyancing process.
Why is a FENSA certificate important when selling your home?
When you sell your home, your conveyancer will request evidence that any replacement windows or doors installed since April 2002 comply with building regulations. A FENSA certificate is the most common and straightforward way to demonstrate this.
Without a FENSA certificate, potential buyers and their mortgage lenders may become wary. Mortgage lenders often require proof of building regulation compliance before approving a loan, as non-compliant installations could impact the property's value or safety. The absence of this document can lead to delays in the sale, or even cause a buyer to withdraw their offer. It is about legal compliance and providing peace of mind to the next homeowner.
What are the risks of not having a FENSA Certificate?
Not having a FENSA certificate can introduce several complications when you are trying to sell your property:
Legal Complications: Your conveyancer will flag this as an issue, as the buyer's conveyancer will expect proof of compliance. This could be a breach of contract if not disclosed early.
Sale Delays: The process of finding a solution can take time, pushing back exchange and completion dates. This can be particularly stressful when you have a moving chain.
Buyer Concerns: Buyers might worry about the quality of the installation, potential energy efficiency issues, or even safety. They might request a price reduction to cover potential future costs or simply walk away.
Mortgage Lender Issues: As mentioned, mortgage providers may refuse to lend on a property without proper building regulation documentation, making it difficult for your buyer to secure financing.
Indemnity Insurance Costs: You might need to purchase an indemnity policy, which covers the buyer against enforcement action by the local authority. While this is a common solution, it comes at a cost and does not prove the windows are compliant, only that the buyer is protected from enforcement.
What to Do If You Don't Have a FENSA Certificate
If you find yourself without a FENSA certificate for your double glazing, do not panic. There are several practical steps you can take to resolve the issue:
Check for an Existing Certificate
First, confirm that the windows or doors actually required a FENSA certificate. Installations before April 2002 did not require one. If the work was done after this date, check if you simply misplaced the document. You can request a copy directly from the FENSA website if the original installer was FENSA registered. This is often the quickest and easiest solution.
Contact the Original Installer
If you know who installed the windows, contact them. They might be able to provide a copy of the certificate or confirm their FENSA registration details, which you can then use to retrieve the certificate yourself.
Obtain a Retrospective Building Control Certificate
If the installer was not FENSA registered, or you cannot trace them, you can apply to your local authority for retrospective building control approval. A building control officer will inspect the installation to determine if it meets current regulations. If it does, they will issue a regularisation certificate. This process can take time and may involve remedial work if the installation is found to be non-compliant.
Purchase an Indemnity Insurance Policy
This is a very common solution, especially if you are short on time or if obtaining a retrospective certificate proves difficult. An indemnity insurance policy protects the buyer (and their mortgage lender) against the risk of enforcement action by the local authority due to the lack of a FENSA certificate. It does not certify the quality of the work, but it mitigates the legal risk. Your conveyancer will typically advise on this, and it is usually the seller's responsibility to pay for the policy.
Negotiate with the Buyer
In some cases, especially if the installation is clearly old and appears sound, the buyer might be willing to proceed without a certificate or an indemnity policy, perhaps in exchange for a small reduction in the sale price. However, this is less common if a mortgage lender is involved.
How Moving Compared Can Help You Navigate This
Dealing with missing documentation during a house sale can be stressful, but you do not have to go it alone. Moving Compared is here to simplify the process and help you find the right professionals to guide you.
Expert Conveyancing Support
The first point of contact for a FENSA issue should be an experienced conveyancer. They can advise you on the best course of action, whether it is tracking down a certificate, applying for retrospective approval, or arranging indemnity insurance.
Through Moving Compared, you can easily compare conveyancing quotes from trusted, regulated professionals across the UK. Our platform connects you with conveyancers who understand the intricacies of property law and can expertly handle issues like missing FENSA certificates, ensuring a smoother transaction.
Surveying for Peace of Mind
While a FENSA certificate focuses on regulatory compliance, a property survey assesses the physical condition of your home. If you are concerned about the quality of the window installation, even if you resolve the FENSA issue, a buyer might still want reassurance.
A surveyor can provide an impartial assessment of the windows' condition, energy efficiency, and overall integrity. While not a substitute for a FENSA certificate, it can offer additional peace of mind to a buyer. Moving Compared allows you to compare quotes for surveyors, helping you find a qualified professional to assess your property comprehensively.
Navigating the sale of your home requires attention to detail and access to expert advice. By understanding the importance of a FENSA certificate and knowing the steps to take if you do not have one, you can proactively address potential issues. Moving Compared is dedicated to making your moving journey clearer and more confident, connecting you with the essential services you need to sell your home successfully.





