Gas Safety Certificates (CP12)

For landlords and letting agents, a CP12 is a legal requirement for rented properties with a gas supply, issued by Gas Safe registered engineers.

Gas Safe Register
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Rated 10 out of 10 for excellent service on Checkatrade
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What a CP12 is

A CP12, more formally a Landlord Gas Safety Record, covers the gas appliances, pipework and flues in a rented property.

  • Required for any rental property with a gas supply
  • Must be renewed every 12 months
  • A copy must be given to tenants within 28 days of the inspection
  • Can only be issued by a Gas Safe registered engineer

Need a certificate booking in?

Landlord or homeowner, tell us the property and we will find you a slot.

Call us01273 110667Send an enquiry

24 hours a day, 7 days a week

Why it matters

A CP12 is a legal obligation for landlords under the Gas Safety (Installation and Use) Regulations 1998, not an optional extra. It protects tenant safety, and most landlord insurance policies require a valid certificate to remain valid. Letting a certificate lapse can mean significant fines and legal risk.

What’s inspected

  • Visual inspection of gas appliances
  • Gas tightness test
  • Flue and ventilation check
  • Safety device checks

Why choose On Heating for this

Gas Safe registered

CP12 certificates can only be issued by a Gas Safe registered engineer, which we are.

Brighton & Hove based

Local to the area we work in, not a call centre booking system.

Same team, new name

On Heating is Pierson Heating under a new name, same engineer and standards.

Gas safety certificates (CP12)

What customers say about our gas safety work

250+ five-star reviews4.9 on Google10/10 on Checkatrade
The nicest tradesperson in Brighton!Checkatrade 10/10

Lee is the nicest tradesperson we used whilst living in Brighton. He fitted a new boiler for us about 8 years ago and serviced it every year since as well as doing gas safety checks and servicing a gas fire. Lovely person and great at what he does and we would highly recommend him. We have sadly moved from Brighton but will recommend him to our buyers. Thanks so much Lee!

Verified reviewerBrighton BN1 · Aug 2025
Gas safety check and repairCheckatrade 10/10

Lee always does a fantastic job. He’s very friendly, trustworthy and on time. I wouldn’t use anyone else when I need any plumbing work done. Highly recommend.

Verified reviewerHove BN3 · Jul 2024
Service of 2 gas fires and central heating boiler and gas safety check.Checkatrade 10/10

Lee was very thorough and careful, and considerate and easy to deal with. I would have no hesitation in recommending him.

Verified reviewerNov 2016
New boiler at short notice and gas certification.Checkatrade 10/10

Lee was scheduled to do a minor repair on the boiler just before tenants were due to arrive. It quickly became evident the boiler needed replacing. Lee managed to drop everything and source and replace the boiler on the same day. Can't thank him enough for an excellent job above and beyond the call of duty.

Verified reviewerSept 2016

Ive used pierson heating twice now, first time was a simple heating problem and he charged me very fairly as it only took him 5 mins to fix. second time was for an incredibly comprehensive safety check on all my gas appliances and to fit a thermostat. fair price and an honest technician. as a landlord and on my personal property i couldn't give a higher recommendation

christian collings
Gas certification for my boiler.Checkatrade 9.5/10

Very happy with the speed at which the job was completed. Gave a very competitive price for the work.

Verified reviewerNov 2014

More from Brighton & Hove customers

Across every job we take on.

Great job. Lee arrived on time, very polite and helpful. Thoroughly recommend him. Work done quickly and tidied up afterwards.

Checkatrade 10/10Verified reviewer

Polite, managed to fix our boiler- securing it from the brink. On time, happy to recommend.

Lee arrived on time and did a great job on my boiler , he even went the extra mile and checked that all my new rads worked.

Lee installed a new shower and cabin into my business. He was very thorough at his work, he offered advise on which shower to buy based on the water pressure. Overall we were very happy with the service and work undertaken and cannot recommend enough.

Checkatrade 10/10Verified reviewer

Lee came within half an hour of contacting him and sorted out our boiler problem.

Checkatrade 10/10Verified reviewer

Lee done a fantastic job on my new bathroom for which I'm really pleased. Any issues encountered were discussed and dealt with professionally and quickly. I would definitely recommend him for future works.

Checkatrade 10/10Verified reviewer

Lee was there and ready on time. He explained everything he was doing and gave good advice, as always.

Checkatrade 10/10Verified reviewer

Lee has been very friendly and reliable and was able to work around my crazy work schedule. He is easy to work with, fast and clean and I will be sure to contact him again for the next service.

Checkatrade 10/10Verified reviewer

Highly recommended in all aspects - would certainly use again.

Checkatrade 10/10Verified reviewer

Brilliant service - very efficient, professional and friendly. Highly recommended!

Checkatrade 10/10Verified reviewer

Gas safety certificate FAQs

How often do I need a CP12?

Every 12 months, for as long as the property has a gas supply and is rented out.

What happens if my property fails the inspection?

Any faults found are explained to you, along with what needs to be repaired or replaced before a valid certificate can be issued.

Do I need one for a non-gas property?

No. A CP12 only applies to rented properties with a gas supply. Properties without any gas appliances or gas pipework do not need one.

Can I get my boiler serviced at the same time?

Yes. See our Boiler Servicing page for details.

Need a gas safety certificate?

Tell us what is going on and we will tell you what it needs. Gas Safe registered, based in Brighton & Hove, and no charge for the conversation.

Call us01273 110667Send an enquiry

24 hours a day, 7 days a week

Ready to sort your heating?