Gas Safety Certificate (CP12) Merton

We cover every Merton postcode in SM4, SW19–20 with same-day bookings if you ring before 11am, and next-day bookings as standard. Typical arrival window is a one-hour slot, confirmed by text the evening before with a live ETA sent 30 minutes out. Response times across South London run 30-45 minutes from the nearest depot for urgent call-outs; standard CP12 bookings are scheduled into a booked slot rather than dispatched as emergencies.

Yes. Wimbledon, Morden and Mitcham are all within our standard coverage area across Merton. Serving properties near the All England Club, Wimbledon Common, and Morden Hall Park. Every postcode in the borough — SM4, SW19–20 — is serviced at the same fixed pricing with no neighbourhood loading. Annual landlord portfolio contracts work across the full coverage area so a single property manager with flats in several of these neighbourhoods is invoiced against one consolidated account.

Fixed pricing applies across South London: £55-£75 for a single combi boiler in a Merton flat, £75-£110 for a boiler plus hob, £110-£140 for three appliances, and £140-£220 for a licensed HMO with multiple boilers or water heaters. Landlords running three or more Merton properties on an annual contract pay from £50 per property with consolidated monthly invoicing. No postcode loading applies within SM4, SW19–20.

A CP12 is a safety check — the engineer verifies each gas appliance is operating safely against manufacturer and Gas Safe tolerances. A boiler service is a maintenance visit — cleaning the heat exchanger, replacing sealing washers, checking the expansion vessel and condensate trap. Most landlords book the two together because combining them usually saves £40-£60 per visit compared with two separate call-outs.

Twelve months from the date of issue. Under Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998, every gas appliance, fitting and flue in a rented property must be checked for safety within twelve months of the last certificate. The renewal can be carried out up to two months before expiry and the original anniversary date is preserved, so you do not lose days off the annual cycle.

Yes. Our office handles the access scheduling — two reminder calls to the tenant, a text confirmation the evening before, and a documented record of all attempts. If the tenant refuses access we issue a headed letter of attempted access for the landlord's legal file, which matters if the matter later escalates to a court order. Regulation 36 expects reasonable attempts, not guaranteed access.

Yes, where access and engineer availability allow. Call before 11am and we can usually attend the same afternoon across most of London. Van-stocked spares mean that minor remedials such as a sticking isolation valve or a loose flue seal can often be sorted on the first visit so the certificate issues clean, avoiding a return call and a second booking fee.

Yes. Short-let hosts fall under the same Regulation 36 duty as any other landlord because each guest booking is a short tenancy. Booking.com, Airbnb and Vrbo all expect hosts to hold a valid in-date CP12, and most London boroughs with Additional HMO Licensing explicitly request it during inspection. The certificate number and issuing engineer's Gas Safe ID are also increasingly asked for during host platform listing verification.