FENSA Builder


Fenestration Self-Assessment Scheme (FENSA) started in 2002 to ensure that companies installing windows and doors meet the building regulations standard. The regulations require all double-glazed windows, doors or roof lights must comply with FENSA. This includes such works as having a conservatory built, an extension or just having windows or doors replaced. The standard extends past your home and includes garages, sheds, outbuildings and offices

Homeowners must comply with current building regulations and thermal performance standards when having new windows or doors installed, additionally obtain a certificate from the local authority or a registered member of a competent-person scheme such as ‘FENSA’. The certificate stays with the property not the person who ordered the works. Meaning if you move house, the FENSA certificate will be passed to the new owners of the property and remain valid for the duration of the installation.

If you would like to learn more about FENSA, or verify your windows and doors are being installed by a FENSA-registered installer, visit:


A full list of competent-person schemes authorised by the UK government can be found at:


Mytradefinder encourages all its traders to become accredited with industry recognised associations, such as FENSA. This helps raise standards, improve customer service and promotes best practice.