Cost of Conservatory Installation
across the UK

# Conservatory Installation Trade Body Accreditation

The main UK trade bodies and regulatory schemes for conservatory installation include the Federation of Master Builders (FMB), which sets quality and professional standards for builders and contractors, and the Glass and Glazing Federation (GGF), which specifically covers window and conservatory manufacturers and installers. Additionally, installers may hold FENSA registration, which means they are certified to self-certify their building regulation compliance for certain glazing work, or they may work with local authority building control. Some conservatory companies are also members of TrustMark, a government-endorsed scheme that identifies vetted traders. These accreditations indicate that a provider has met defined standards for competence, insurance, and customer protection, though they vary in their specific scope and rigour.

To verify a provider's credentials, you should ask to see evidence of their accreditation before hiring them and check the relevant trade body's online register to confirm their membership status and that their registration is current. The FMB, GGF, and TrustMark all maintain searchable registers on their websites, and FENSA registration can be verified through the FENSA website using a contractor's ID number. It is also worth asking whether they carry professional indemnity insurance and public liability insurance, both of which are standard for accredited providers. This verification matters because accreditation offers a degree of consumer protection; if something goes wrong, you typically have a route to formal complaint and dispute resolution through the trade body, whereas unaccredited traders may offer no such recourse.

Accredited conservatory installers typically charge between 10 and 20 per cent more than unaccredited competitors, reflecting the costs of maintaining membership, insurance, and compliance with professional standards. While this premium may seem high upfront, it usually represents good value because accredited installers are more likely to complete