Trade certifications, licences and registrations

What each certification actually means, how many tradespeople hold it in the public records we track, and how to verify it before you hire. Every figure comes from named public sources — nothing is self-declared to us.

Counts reflect the public register and directory records we have collected and cross-referenced — from licences required by law to voluntary schemes. They are not official membership totals. Always verify a specific trader on the official register before hiring.