Gas Safety & CP12 in Hounslow

Hounslow's housing mix runs from Edwardian terraces in Chiswick, through 1930s semis across Hounslow proper and Heston, post-war stock around Feltham, and riverside flats in Brentford. The borough covers TW3, TW4, TW5, TW6, TW7, TW8, TW13, TW14, and W4, including Isleworth, Bedfont, and Cranford. Most of the borough sits on Affinity Water with a Thames Water overlay in part of W4, which means mains-pressure profile varies slightly across the patch. The Heathrow flightpath also brings noise-buffered roof voids on some properties that complicate vent flue runs. Our Gas Safe registration is 972173 (verifiable at gassaferegister.co.uk).

Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998 (GSIUR 1998) is the binding instrument for landlords. The Landlord Gas Safety Record (CP12 or LGSR) is issued within 28 days of the check, and the tenant receives their copy inside the same 28-day window. For HMOs and converted Chiswick villas we identify every appliance on a single certificate and flag flue-route issues caused by acoustic insulation.

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

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.