Gas Safety & CP12 in Westminster

Westminster brings some of the most demanding gas safety work in the country into our diary. The borough covers SW1, W1, W2, W9, NW1, NW8, and WC2, taking in Mayfair, Marylebone, Soho, Pimlico, Belgravia, Westminster itself, Maida Vale, St John's Wood, and Paddington. The housing mix runs from stuccoed terraces in Belgravia and Pimlico, through mansion blocks across Marylebone and Maida Vale, to period flats in Mayfair and Georgian houses in St John's Wood. Mains pressure varies significantly between mansion-block risers and high lead-pipe legacy persists across W1 and SW1. Listed-building consent is often required for visible plumbing changes inside the conservation areas. Our Gas Safe registration is 972173 (verifiable at gassaferegister.co.uk).

Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998 (GSIUR 1998) places the annual inspection duty on the landlord. The Landlord Gas Safety Record (CP12 or LGSR) is issued within 28 days of the inspection, and the tenant receives their copy inside the same 28-day window. For Crown Estate and Grosvenor Estate freeholds, we coordinate access through the relevant managing agent ahead of the visit.

Each gas appliance is visually inspected for damage and combustion residue, working pressure is measured in kPa against the manufacturer data plate, gas tightness is verified using a calibrated digital manometer with a let-by check first, flue flow is proven with smoke pellets for open-flue appliances or an anemometer for room-sealed plant where indicated, and ventilation is calculated against BS 5440-2 for every open-flue installation in the dwelling.

Pricing excludes VAT. CP12 with up to three appliances is 125 pounds, each extra appliance is 20 pounds, CP12 plus annual boiler service combined is 210 pounds at the same visit, and a second boiler at the same visit is 95 pounds. Active gas leak: ring National Gas Emergency on 0800 111 999 first, then us for shut-off, BS 6891 carcassing repair, and re-certification.