FENSA is a government-authorised scheme that monitors building regulation compliance for replacement windows and doors. Every FENSA Approved Installer, from large national brands to small local companies, is assessed regularly by FENSA to ensure its standards are continually maintained.

The replacement of external windows and doors is covered by Building Regulations and compliance is required by law.  As such, if you do not use an installer regulated by an approved scheme (e.g. CERTASS or FENSA) who can self-certify the works you will require a completion certificate from Building Control and will have to register the works with your local authority yourself.  This alternative process will require inspection by an approved Building Control Officer for which you will normally be charged.

What's covered?

FENSA covers the replacement of external windows, doors, roof windows and roof lights in your home, against the relevant Building Regulations. Note that the property must be sited on its original footprint, and the use and size of rooms mustn’t be altered.

What’s not covered?

FENSA doesn’t cover the installation of windows and doors in new conservatories, porches, new builds, new extensions, repairs (where frame not included) and commercial properties.

Need a FENSA certificate?

If you can't find a FENSA certificate or need a replacement you can obtain one online.  You can also use the tool to lookup if a certificate exists for your property.

Click here to search for FENSA Certificates.