Independent reference, published since 2026

Interior Designer UK

UK interior design careers, fees and rules

Regulations and consents

The Regulations and consents section maps interior work in England to the Building Regulations Approved Documents M, L, B and P, to listed building consent under the 1990 Act, and to the notice periods of the Party Wall etc. Act 1996.

The Regulations and consents section of Interior Designer UK sets out which statutory approvals an interior project in England triggers and what each one requires. The articles work from primary sources: the Approved Documents published on GOV.UK for Part M (access), Part L (energy), Part B (fire) and Part P (electrical safety), the Planning Portal guidance on internal walls, kitchens, bathrooms, electrics and replacement windows, the GOV.UK explanatory booklet on the Party Wall etc. Act 1996, and the Planning (Listed Buildings and Conservation Areas) Act 1990 on legislation.gov.uk. Readers will find the exact figures that matter on site: the 775 mm clear door width in Approved Document M, the 1.4 W/(m2.K) window U-value in Approved Document L, the 0.33 m2 escape window in Approved Document B, the 2.25 m and 0.6 m special-location zone in Approved Document P, the two-month party wall notice, and the six-month and two-year custodial maximums for unauthorised works to a listed building.

Articles in Regulations and consents

The articles in the Regulations and consents section are listed below with the question each one answers, and every article carries its own sources list at the point of citation.