What is FENSA?

FENSA (Fenestration Self-Assessment Scheme) is the largest Competent Person Scheme for replacement windows and doors in England and Wales. Installers registered with FENSA can self-certify compliance with Building Regulations, avoiding the need for separate local-authority sign-off. A FENSA certificate is issued to the homeowner and is requested by buyers during a property sale. Alternatives include CERTASS and Assure.