Gas Safety Certificates · Acton & West London

Landlord gas safetycertificates (CP12)across West London.

A Gas Safe registered engineer inspects every gas appliance, flue and pipework run in the property, and your CP12 lands in your inbox the same day. Same-week slots across Acton, Ealing and the W postcodes — no chasing, no missed renewal dates.

Get My Free Quote 07360 542683

Gas Safe registered · £2M insured · 30+ years in the trade · 24/7 emergency line

CP12 Landlord Gas Safety Record on a clipboard beside a flue gas analyser and gas leak detector, with an open white combi boiler and yellow gas isolation valve behind — Ash Villa Gas Safe certificates in Acton and West London

30+ Years in the Trade

Gas Safe Registered

Vaillant Approved Installer

£2M Public & Employers' Liability

90-Minute Emergency Response

Service Overview

The plain-English version.

What it is

A statutory annual inspection of every gas appliance, flue and section of gas pipework in a rented property, carried out by a Gas Safe registered engineer. It ends with a Landlord Gas Safety Record — the document everyone calls a CP12 — listing each appliance, the checks performed and any defects found.

Who it's for

Landlords and letting agents renting out property in England and Wales, who are legally required to hold a valid record for every let. Homeowners also book the same check voluntarily — usually before selling, after buying, or alongside an annual boiler service.

When you need it

Every 12 months. The check can be carried out in the two months before the current certificate expires without shortening the renewal date, so booking early costs you nothing. New tenancies need a valid record before the tenant moves in, and a copy handed over within 28 days of the check.

Why use a professional

It is a legal duty under the Gas Safety (Installation and Use) Regulations 1998, and enforcement is real — but the more immediate reason is that the check finds the things that actually hurt people: a cracked heat exchanger, a blocked flue, a leaking joint, a burner running rich and producing carbon monoxide.

Left Too Long?

Small problem now.
Big bill later.

The cheapest time to deal with a plumbing or heating fault is almost always now. Water damage, gas issues and system stress compound quickly — the invoice grows with them.

If you leave it

› An unsafe appliance keeps running. Carbon monoxide has no smell and no taste — a spillage test takes minutes and is the only reliable way to catch it.
› You lose your defence if something goes wrong. Without a valid record, a gas incident becomes a very different conversation with your insurer and the HSE.
› Buildings and landlord insurance policies routinely require an in-date CP12. A lapsed certificate can invalidate a claim that has nothing to do with gas.
› Section 21 possession in England is affected by gas safety compliance — a missing record can undermine a notice you have already served.
› Small faults become expensive ones. A slightly out-of-range gas rate or a corroding flue seal is a cheap fix now and a boiler replacement in two winters' time.

Common DIY mistakes

› Assuming a boiler service and a CP12 are the same thing. A service cleans and maintains one appliance; a CP12 is a safety inspection of every gas appliance, flue and pipework run in the property.
› Booking whoever is cheapest without checking the engineer's Gas Safe registration card and the specific appliance categories on it.
› Leaving the renewal to the last week and then finding the property is untenanted, inaccessible or the tenant will not answer the door.
› Not giving the tenant a copy. The check being done is only half the duty — the record has to be issued within 28 days, or at the start of a new tenancy.
› Forgetting the appliances that are not the boiler — gas hobs, gas fires, back boilers and instantaneous water heaters all fall inside the inspection.

Our Process

Predictable. Documented.
Signed off.

You get the same sequence every time — so there are no surprises on the invoice and nothing missed on the job sheet.

01

Booking

Call or send the property address and we confirm a slot, usually within the same week. We can liaise directly with your tenant to arrange access if that's easier.
02

Appliance inventory

The engineer records every gas appliance on site — boiler, hob, fire, water heater — plus any appliance that is present but not being tested, and why.
03

Safety checks

Gas tightness test on the installation, operating pressure and gas rate against the manufacturer's data plate, burner combustion analysis, flue flow and spillage testing, ventilation adequacy, and a visual check of pipework, bonding and safety devices.
04

Defects and immediate action

Anything classified At Risk or Immediately Dangerous is explained on the spot. With your permission the appliance is made safe and capped, and the situation is recorded properly.
05

Certificate issued

The Landlord Gas Safety Record is emailed to you the same day, typically within a couple of hours of the engineer leaving. A copy goes to the tenant if you'd like us to send it.
06

Renewal reminder

We keep the expiry date on file and give you a nudge before it runs out, so the record never lapses between tenancies.

What You Actually Get

Concrete outcomes,
not marketing fluff.

Gas Safe registered engineers

Every check is carried out by a Gas Safe registered engineer with the correct appliance categories on their card. Ask to see it on the doorstep — they expect it.

Same-day certificate

You get the record digitally the same day, not a fortnight later. Letting agents can forward it to tenants straight away.

Multiple appliances, one visit

Boiler, hob, gas fire and water heater are all covered in a single appointment and appear on the same record.

Repairs handled in-house

If the check finds a fault, the same team can quote and fix it — no second contractor, no second access appointment with the tenant.

Portfolio-friendly

Landlords and agents with several properties in W3, W5 and W13 can book them together and get consolidated paperwork.

Bundle with a service

A CP12 inspection and an annual boiler service in the same visit is the cheapest way to keep both the compliance and the warranty in order.

The Detail

Materials, methods, and where the money goes.

The term 'CP12' comes from an old CORGI form number and stuck. Legally the document is a Landlord Gas Safety Record, and what it certifies is a defined set of checks. Here's what that actually involves in a typical West London flat or terrace.

What the engineer is legally required to check

Four things, for every gas appliance: that it is on an effective flue that removes products of combustion safely; that there is adequate permanent ventilation and it is clear; that the appliance is burning gas safely and at the correct operating pressure and heat input; and that its safety devices — flame supervision, overheat cut-outs, pressure relief — are working. Alongside that, the gas installation pipework is tightness tested and visually inspected, and protective equipotential bonding is checked. Anything that fails is classified using the Gas Industry Unsafe Situations Procedure as At Risk or Immediately Dangerous, and the outcome is written on the record whether or not you like what it says.

CP12 versus a boiler service — they are not the same job

A gas safety check answers one question: is this appliance safe right now? A service answers a different one: will it still be working well in twelve months? A service means stripping and cleaning the burner and heat exchanger, checking the condensate trap, the expansion vessel charge, the seals and the electrodes. Most boiler manufacturers, Vaillant included, require an annual service to keep the warranty valid — a CP12 alone will not keep a guarantee alive. If you own the property and rent it out, you generally want both, and doing them in one visit saves an access appointment.

Timing, renewals and the 'two month rule'

The record is valid for twelve months from the date of the check. You can have the check done up to two months before the expiry date and keep the original renewal date, rather than resetting the clock — so there is no penalty for booking early and no reason to leave it late. New tenancies need a valid record before the tenant takes occupation, and a copy has to reach them within 28 days of the check being carried out. We hold your expiry dates and prompt you ahead of time.

Access problems and untenanted property

The most common reason a landlord goes out of date is not cost — it's access. If a tenant is not engaging, keep a written record of every attempt to arrange the visit; it demonstrates you took all reasonable steps. In practice, we find giving the tenant a direct number and a two-hour window solves most of it. For empty properties we can collect keys from a local agent. If the gas is capped and no appliance is in use, tell us before the visit and we will advise what is actually required rather than sending an engineer for nothing.

When the check finds a problem

It happens, particularly in older Acton and Ealing conversions where flues have been boxed in during past refurbishments. If an appliance is Immediately Dangerous the engineer will ask permission to disconnect and cap it — the tenant cannot be left with a live carbon monoxide risk. At Risk appliances are turned off and labelled. Either way you get a clear explanation of the defect, what it will take to correct it, and a quote. Because we run our own plumbing and heating team, remedial work usually happens within days rather than weeks, and a re-check is issued once it's done.

Carbon monoxide alarms and the wider duty

Since 2022, English regulations require a carbon monoxide alarm in any room used as living accommodation that contains a fixed combustion appliance — that includes gas boilers, but excludes gas cookers. Alarms must be repaired or replaced once the landlord is told they are faulty. We check for a working alarm as part of the visit and will tell you plainly if one is missing or past its end-of-life date, so you are not compliant on gas and exposed somewhere else.

Frequently Asked

The questions we hear on the phone.

Nothing here is generic — these are answers we give West London customers every week.

Ask us directly

How much is a gas safety certificate in West London?

It depends on how many gas appliances are in the property. Call 07360 542683 with the address and appliance list and we'll give you a firm price over the phone — there's no charge for the quote, and no call-out fee on a booked CP12 appointment.

How long does a CP12 inspection take?

A single-boiler flat is usually 30 to 45 minutes. Add roughly 15 minutes per additional gas appliance such as a hob or gas fire. Combining it with a full boiler service takes around 90 minutes in total.

Is a gas safety certificate a legal requirement?

For landlords in England and Wales, yes — the Gas Safety (Installation and Use) Regulations 1998 require an annual check of every gas appliance and flue in a rented property, and a record issued to the tenant. For owner-occupiers it is not compulsory, but it is strongly recommended and many people book one alongside their annual service.

How long is a CP12 valid for?

Twelve months from the date of the check. You can renew up to two months early without losing the remainder of the current period, so the anniversary date stays the same.

What happens if an appliance fails the check?

The engineer explains the defect, classifies it under the industry unsafe situations procedure, and with your permission makes it safe. You get a written record of the defect and a quote for the repair. Our own engineers can carry out the remedial work, usually within a few days.

Do I need a certificate if the property is empty?

If there is no tenancy in place, the annual landlord duty does not apply for that period — but you will need a valid record before a new tenant moves in. In practice most landlords keep the cycle running so there is never a gap between lets.

Does a gas safety check cover my gas cooker or hob?

Yes. Every gas appliance the landlord owns and provides is included — hobs, cookers, gas fires, back boilers and water heaters, not just the boiler. Appliances owned by the tenant are not covered, though the connecting pipework still is.

Can you do the certificate and the boiler service together?

Yes, and it's the sensible way to do it. One visit, one access arrangement with the tenant, and you keep both your legal compliance and your manufacturer's warranty in order.

Do you cover Acton and Ealing?

Our yard is in Acton W3 8HL, and CP12s are a core part of what we do across Acton, Ealing, West Ealing, Ealing Broadway, Ealing Common, East and North Acton and the surrounding W and NW10 postcodes.

How quickly can you get a certificate to me?

Same-week appointments in our core area, and the record is emailed to you the same day as the visit — usually within a couple of hours of the engineer finishing.

Wet room tanking and waterproofing in progress at an Ash Villa Development project in West London

Next Step

Book a free on-site quote.
Get a firm price in 2–3 days.

No pressure, no obligation. A Gas Safe engineer visits, scopes the job in person, and puts a written quote in your inbox — usually within 2–3 working days. For emergencies, call the line — it's answered 24/7 by the team, not a call centre.

Request My Free Quote 07360 542683

Gas Safe registered · £2M insured · 30+ years in the trade · 24/7 emergency line

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Landlord gas safetycertificates (CP12)across West London.

The plain-English version.

Small problem now.Big bill later.

Predictable. Documented.Signed off.

Booking

Appliance inventory

Safety checks

Defects and immediate action

Certificate issued

Renewal reminder

Concrete outcomes,not marketing fluff.