CP12 Gas Safety Inspection in Rotherham and Barnsley: Stay Legally Compliant, Stress-Free

What a CP12 costs

A CP12 is £114 including VAT at standard rate and £132 in Band A. That covers the boiler, the gas meter and the gas pipework. Additional appliances — a hob, an oven, a gas fire — are £42 each.

If you want the boiler serviced at the same visit, the combined service and safety package is £186 standard, £204 Band A, which is cheaper than booking the two separately. A set appointment time rather than a standard 4-hour slot adds £30.

Check which band your postcode falls into on our rates page. We can't inspect back boilers or gas fires of that type.

Who legally needs one

If you rent out a property, a CP12 isn't optional — it's the law. Every gas appliance, flue and pipe must be checked once a year by a Gas Safe registered engineer, with a valid record in place before a new tenant moves in and renewed every twelve months after that.

Homeowners living in their own property are a different case. There's no legal requirement, and you can skip it. We wouldn't recommend it, though. A gas boiler doesn't announce when something's gone wrong, and carbon monoxide has no smell and no colour. We've walked into homes where nobody had had a check in years and found a cracked heat exchanger the owner had no idea existed.

• Landlords, including anyone renting a single room in a shared house, need an annual check by law
• Letting agents managing property on a landlord's behalf carry the same legal duty
• Homeowners don't need one by law, but it's sensible practice, especially with an older boiler
• Buyers of a resale home often ask for a recent CP12 as part of their due diligence

Get this wrong as a landlord and you're not just risking a fine, you're risking someone's safety in a property you're responsible for.

What we check

A CP12 means testing every gas appliance, pipe and flue in the property, following HSE guidance. It usually takes 30 to 60 minutes depending on how many appliances there are.

We start with a visual inspection of each appliance — boilers, cookers, gas fires, water heaters — looking for wear, staining or damage. Pipework gets checked for corrosion, secure jointing and correct routing, which matters in older terraced housing where original pipework is often still in place. Flues and chimneys are examined to confirm they terminate safely and aren't blocked, since a faulty flue is one of the most common ways carbon monoxide ends up in living space.

Then the functional testing: operating pressure and gas rate measured at the meter, safety devices tested to confirm they shut the gas off properly, and the burner flame inspected for signs of incomplete combustion.

• Visual check of each appliance, pipework and flue
• Operating pressure and gas rate measured at the meter
• Safety device and flame failure device testing
• Ventilation check to confirm airbricks and vents are unobstructed
• Flue flow test to confirm combustion products escape safely
• Appliance stability and installation checks

Ventilation is the part people underestimate. We confirm airbricks, trickle vents and room ventilation haven't been blocked by furniture, insulation or DIY work, because insufficient air supply lets dangerous combustion by-products build up. That matters particularly in properties with converted rooms or loft conversions, where the original ventilation may have been altered along the way.

Once everything's assessed, you get a record documenting the pass or fail status of each item, plus any remedial action taken or recommended. That document is the CP12.

Renewal deadlines and paperwork

Every landlord gas safety check must be repeated at intervals of no more than 12 months from the date of the previous inspection. Not a rolling calendar year — a strict 12-month window from your last certificate date. If your last CP12 was issued on 14 March, the renewal needs completing on or before 14 March the following year.

Book a fortnight early and you build in a buffer against scheduling clashes, tenant access problems and winter demand, without ever breaching the deadline.

• Renewal window: no more than 12 months since the last inspection date
• Record retention: keep the last two years of certificates on file for HSE or insurance purposes
• Existing tenants: must receive a copy within 28 days of the check
• New tenants: must receive a copy before the tenancy start date

Missing either of those sharing deadlines is treated as seriously as skipping the inspection altogether, since the paperwork trail is what regulators rely on if there's ever a dispute.

Multiple properties? If you've got several around Rotherham, Barnsley or Doncaster we can usually group the visits into one day, which keeps the renewal dates aligned and saves you tracking them separately.

Landlord Certificates, On Time Every Year

Once the check is done, the certificate is emailed to you, so you can pass a copy to your tenants straight away. When the next one is due, we get in touch, so the 12-month deadline never creeps up on you.

What happens if something fails

Not every fault means an appliance gets switched off on the spot, but where a defect presents an immediate risk, we have a legal duty to act right then.

Any appliance classified Immediately Dangerous must be disconnected or capped before we leave. That might mean isolating a boiler, cooker or gas fire from the supply so it physically can't be used until repaired. We leave a warning notice spelling out what was found, what action was taken, and what needs to happen before it can be safely reconnected.

• Immediately Dangerous — capped or disconnected on the spot, no exceptions
• At Risk — continued use allowed temporarily, but requires follow-up repair
• Not to Current Standards — recorded for information, no immediate disconnection

We'll quote for the remedial work there and then where we can, and book the follow-up visit to confirm the appliance is safe before it goes back into service.

If you're managing through a letting agent, expect them to want both the original warning notice and the follow-up certificate — they're usually the ones proving compliance within their own systems.

Checking your engineer is genuine

Not everyone who touches a boiler can sign off a CP12. Only a Gas Safe registered engineer can legally carry one out.

Our registration number is 584578, and you can look it up on the Gas Safe Register website before we come anywhere near your property. We'd encourage you to — most landlords have never had to check, and it takes a minute.

• Ask to see the Gas Safe ID card and check the registration number yourself
• Ask which appliances and flue types they're qualified to inspect, since not every engineer covers every appliance
• Ask how long the inspection will take — a proper CP12 isn't a five-minute job
• Ask what happens if something fails, and whether they'll explain it in plain terms
• Ask for the certificate in writing straight after the visit, not weeks later

Plenty of the housing around here still has original gas fittings tucked behind fireplaces or under stairs. An engineer who rushes that kind of inspection misses things.