Gas Safety Certificate Hounslow — from £64.99

What is a Gas Safety Certificate (CP12)?

A Gas Safety Certificate, formally known as a CP12, is a document confirming that all gas appliances, flues and pipework in a rental property have been inspected by a Gas Safe Registered engineer and found to be safe. The engineer checks each appliance for correct operation, adequate ventilation, secure flue connections and correct gas pressure, and lists every appliance on the certificate along with its result.

Every private landlord in England has been legally required to hold a valid CP12 and renew it every 12 months since the Gas Safety (Installation and Use) Regulations 1998 came into force. This national duty applies in Hounslow as it does across England, and an HMO licence can add its own conditions on top.

Gas safety in Hounslow — local property context

Hounslow has a higher inter-war share of homes than London and fewer flats in converted buildings. Purpose-built flats house 37.4% of households, terraced houses 20.5% and detached houses 4.9%, while only 6.4% live in flats in converted or shared houses, against 11.1% across London (Census 2021). After purpose-built flats, semi-detached houses are the most common type of home.

The council's Housing Strategy says average private rents rose 46% between 2018 and 2024. At the 2021 Census, 30.9% of Hounslow households rented privately, close to London's 30.0%. Our Gas Safe registered engineers are experienced with the boilers, gas fires and appliances typically found in properties across the TW7, TW3, W4, TW13, TW14, TW8, TW5, TW4, UB2 postcode areas, and regularly carry out CP12 inspections across Hounslow for private landlords, letting agents and HMO operators.

Gas safety in Hounslow: 652 notices for gas and electrical certificates

Since additional HMO licensing began in August 2020, Hounslow Council says it has issued 652 notices requesting gas and electrical safety certificates to be provided (figures to March 2025).

In a licensed HMO, condition 3 requires the certificate to reach the council each year. Under condition 11.9, a copy has to be on display in the common parts or with each tenant. Book the next check before the current certificate runs out, so a valid one is in place for the whole licence, as condition 3 also requires.

Households in semi-detached houses

28.6% (London 18.6%)

Census 2021

Homes built 1919 to 1939

28.5% (London 22.2%)

VOA 2025

Homes built before 1919

16.4% (London 29.1%)

VOA 2025

Gas Safety Certificate pricing in Hounslow

Fixed pricing by number of gas appliances. The same prices apply in Hounslow as across all other London boroughs — no London surcharge. The only location-based fee is the £20 Congestion Charge Zone addition for central London properties.

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What's included from £64.99

Every gas safety check we carry out in Hounslow covers the complete inspection at no extra cost beyond the price shown.

• Inspection of every gas appliance — boiler, hob, cooker and gas fire
• Flue flow and spillage testing on every appliance with a flue
• Gas pressure and burner pressure checks
• Visual check of pipework, joints and fittings for leaks or damage
• Ventilation adequacy check for every gas appliance
• Gas Safe registered engineer — fully qualified and independently assessed
• Signed CP12 certificate emailed within 24 hours
• Immediate isolation of any appliance found to be unsafe

Other landlord certificates in Hounslow

We also cover these landlord certificates in Hounslow:

Managing an HMO in Hounslow? See all HMO compliance certificates →

Gas Safety Certificate in nearby boroughs

We cover all 33 London boroughs. See Gas Safety Certificate pricing and booking for areas near Hounslow: