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CERTASS Certificate

A CERTASS Certificate serves the same purpose as a FENSA certificate — confirming that replacement windows or doors comply with Building Regulations. CERTASS is an alternative Competent Person Scheme to FENSA.

Building Regulations Part L, Part N, Part KValid: Permanent

No credit card required. Set up in 30 seconds.

What it covers

  • Window/door specification
  • Thermal performance compliance
  • Safety glazing compliance
  • Self-certification to Building Control

Who needs a CERTASS?

Homeowners
Property buyers/sellers
Conveyancing solicitors

Manage your CERTASS with CertBox

1

Upload the PDF

Upload your CERTASS to CertBox against the right property.

2

Track expiry dates

Your dashboard shows when certificates need renewing.

3

Share via link

Send a secure link to landlords, agents, or Building Control.

Frequently asked questions about CERTASS

Is CERTASS the same as FENSA?
Both are Competent Person Schemes that self-certify replacement windows to Building Regulations. The certificates have the same legal standing. The difference is which scheme the installer is registered with.

Related certificates

Plumbers

FENSA

Never lose your FENSA window certificate. Upload, track installations by property, and share with solicitors during property sales — all in one place.

Electricians

EPC

Never miss an EPC expiry. Upload, track expiry dates, and share with tenants and letting agents — all in one place.

Ready to manage your CERTASS?

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Manage your CERTASS with CertBox