Certificates — what they prove

• The Building control completion certificate — what it proves and what to do without one
• The Electrical certificate (NICEIC / NAPIT) — what it proves and what to do without one
• The FENSA / CERTASS certificate — what it proves and what to do without one
• The Gas Safe certificate — what it proves and what to do without one

Reviewed by Sean McNamara · 2026-09-03 · Independent information directory — not legal advice.