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Landlord Gas Safety Certificates (CP12)
in London & the Home Counties.

Annual gas safety checks for rented homes, HMOs and managed portfolios, carried out by Gas Safe registered engineers. Fixed price, no call-out fee, and your certificate issued on the day.

Book a Gas Safety Check

Book a Gas Safety Check

Stay compliant with a gas safety check done properly

If you let a property with gas appliances, you’re legally required to have them checked by a Gas Safe registered engineer every 12 months. You also need to give your tenants a copy of the record. Miss the deadline and you’re exposed to fines, invalid insurance, and problems serving notice.

We check every gas appliance, fitting and flue you provide, test for safe operation, and record the results on a Landlord Gas Safety Record (commonly called a CP12). If something fails, we explain what’s wrong and quote for the repair before any work goes ahead.

Managing more than one property? Account clients get portfolio pricing and one point of contact, with certificates logged for every property.

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yusra ibrahim profile picture
yusra ibrahim
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Great service! We had a leak in the middle of the night and called Primefix around midnight. The job was booked straight away, and the engineer arrived in less than an hour. Aurel inspected our bathroom, quickly found the source of the leak, and fixed it on the first visit. He saved us a lot of trouble and kept the damage to a minimum. Highly recommended! Primefix will definitely be my go to company from now on.
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Vinobha Yoganathan profile picture
Vinobha Yoganathan
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Had a leak in our bathroom and PrimeFix Group sorted it out quickly. Professional, reliable and got the job done without any hassle. Highly recommend to anyone needing a trustworthy plumber

Owner's reply
Hi Vinobha, We want to thank you for the positive feedback and are delighted that our engineer found the leak in your bathroom. Much appreciated.
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Richard Sirakov profile picture
Richard Sirakov
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We had a leak in the kitchen ceiling ,Aurel came and resolve the issue within a day. Very professional team. Highly recommended.

Owner's reply
Hi Richard, We want to thank you for your support and positive feedback. We’ll make sure to pass on your kind words to the engineer.
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Yoanna Kusheva profile picture
Yoanna Kusheva
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We had No hot water on Sunday evening . Matt From PrimeFix came for rescue and fix our boiler with No time. I would recommend Prime Fix to our friends and family. Thank You

Owner's reply
Hi Yoanna, We’re delighted that Mat managed to bring the hot water back and we appreciate your positive feedback.
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Thinesh K profile picture
Thinesh K
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Great service and will highly recommend

Owner's reply
Hi there Thinesh, We’re glad you had a great service and thank you for the recommendation.
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Gnana Kanda profile picture
Gnana Kanda
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Losing over 40 litres of water a day. Previous firm sent two Engineers daily, cost thousands, never found the leak. PrimeFix sent one engineer the same day I booked. James was brilliant, found it in a couple of hours and left a detailed written report with photos for insurance. That is the difference between a bill and a result

Owner's reply
Thanks so much for your kind review really glad James got to the bottom of the leak quickly and left you a proper report , we will pass this to James Thanks for choosing PrimeFix
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ipek yusuf profile picture
ipek yusuf
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Absolutely fantastic work. Quote was given promptly and honestly, the level of dedication to the job is unmatched. 100% would recommend.

Owner's reply
Thanks so much , Ipek! Really glad the quote was straightforward and the dedication to the job showed through.Thanks so much for the recommendation.
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Chimen Hussein profile picture
Chimen Hussein
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In all honesty I am really chuffed :-) I have never in all of my 58 years seen such a hard working young man to the tea👌he knows exactly what he is doing, and is very professional and respectful. I would 101 % recommend. The work that he has carried out in one day is remarkable. My bath was on the verge of collapsing due to an unseen leak. My bathroom is comming back to life! Thank you G and D :-) forever greatfull.

Owner's reply
Thank you so much for this lovely review! Really glad the leak was caught in time and your bathroom’s back on track . We’ll pass this on to the engineers. Thanks for trusting us.
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Xavier B. Mayer profile picture
Xavier B. Mayer
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Excellent experience : — highly competent — pro-active and reactive — always available — prompt and responsive — solution finder and reliable team My leak was very tricky to uncover. They went methodically, and found the answer. Well done team ! 👏🏻👏🏻👏🏻👏🏻

Owner's reply
Hi Xavier, Thank you so much for your kind words and for taking the time to leave us such a great review.We really appreciate it
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erina profile picture
erina
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Great work! Highly recommend, Fast service and charges reasonable amount. Excellent and came with promised support for future wise.

Owner's reply
Hi Erina, We’re delighted to hear that you were left satisfied and we want to thank you for your positive feedback

Gas Safe on every job

Every check is carried out by a Gas Safe registered engineer. Prime Fix Gas Safe Number: 983685.

Certificate on the day

Your Landlord Gas Safety Record is issued the same day, ready to send to your tenants or letting agent.

Fixed price, agreed upfront

One fixed price for the check and certificate. No call-out fee, and no parking or ULEZ charges passed on.
Landlord Gas Safety Certificate (CP12)
Landlord Gas Safety Certificate (CP12)
Landlord Gas Safety Certificate (CP12)
Landlord Gas Safety Certificate (CP12)
Landlord Gas Safety Certificate (CP12)
Landlord Gas Safety Certificate (CP12)

Book Your Landlord Gas Safety Check (CP12) Today

Every quote is confirmed in writing before any work starts—no call-out fee, no parking or ULEZ surcharges, no surprises on the invoice. All work is backed by an 18-month workmanship guarantee.

What Your Gas Safety Check Covers

Every appliance, fitting and flue you provide to your tenants is checked, tested and recorded.

Boiler Faults & Diagnostics

Boilers

Checked for safe operation, correct gas pressure and burner performance, and that safety devices are working.

Landlord Gas Safety Certificate (CP12)

Gas Hobs & Cookers

Tested for safe operation, stability and correct connection to the supply.

Landlord Gas Safety Certificate (CP12)

Gas Fires

Checked for safe operation, ventilation and correct flue performance.

Gas Leaks Detection - Carbon Monoxide Audit

Carbon Monoxide Checks

Appliances checked for signs of incomplete combustion. We can also fit or replace CO alarms where they're required.

Landlord Gas Safety Certificate (CP12)

Flues & Chimneys

Checked to confirm combustion products are being removed safely from the property.

Gas Leaks Detection - Emergency Isolation

Ventilation

Checked to confirm appliances have the air supply they need to burn safely.

Gas Leaks Detection - Gas Tightness Testing

Gas Tightness Test

A pressure test across the installation to confirm there are no leaks in the pipework.

Landlord Gas Safety Certificate (CP12)

HMOs & Multi-Unit Properties

Checks across shared and individual units, with records kept for each one.

Transparent Gas Safety Certificate (CP12 )Pricing

Every quote is confirmed in writing before work starts. No call-out fee. No hidden charges.

GAS SAFETY CERTIFICATE (CP12) + BOILER/COMBI BOILER SERVICE

Fixed Rate

£215 +VAT on weekdays, £245 +VAT at weekends. No call-out fee. Certificate issued the same day.

REMEDIAL
WORK

Quoted Before We Start

If an appliance fails, we explain the fault and confirm a price in writing before any repair. From £99 +VAT for the first hour.

ACCOUNT
CLIENT

Portfolio Pricing

Discounted rates for landlords, HMOs and managing agents with multiple properties. Dedicated account manager included.

No hidden extras: no parking, fuel, ULEZ, or Congestion Charge surcharges. Materials at trade cost plus 30% markup, fully itemised on the invoice.
Account-client portfolios receive discounted rates from the published prices.

Meet the PrimeFix Gas Safe Engineers

No subcontractor roulette. No stranger in a van with someone else’s logo on it. Just the same faces who get the job done, every time.

John M | 9+ Years experience

Gas Safe Registered | NVQ Level 3 Plumbing & Heating | ACS CCN1 & CENWAT Qualified | G3 Unvented Hot Water Certified

Arron H | 15+ years experience

Gas Safe Registered | NVQ Level 2 | Fully Qualified Plumber

Landlord gas safety checks wherever your properties are

One accredited team, the same standards, wherever you’re based.

Book a Prime Fix Gas Safe Engineer

On call around the clock for leak detection, plumbing, heating, electrical, and drainage emergencies.

One number, every trade

On call around the clock for emergencies. For planned work and quotes, we typically respond within the hour during business hours.

24/7 Phone Line

0208 108 0400

Email Us

info@primefixgroup.uk

Hours

Monday to Friday 8am to 6pm | Emergency Line 24/7

Request a Callback

Leave your details and a PrimeFix engineer will be in touch within 60 minutes.

Landlord Gas Safety Certificate FAQs

Common questions from landlords and letting agents, answered plainly. If yours isn't here, call us on 0208 108 0400.

What is a CP12 certificate?

CP12 is the common name for a Landlord Gas Safety Record. It’s the document that shows every gas appliance, fitting and flue you provide has been checked by a Gas Safe registered engineer and is safe to use.

Every 12 months. You can have the check done up to two months before the current record expires and keep the original expiry date, so you won’t lose any time by booking early.

 

 

Existing tenants must receive a copy within 28 days of the check. New tenants must be given a copy before they move in. You also need to keep each record for at least two years.

 

The engineer records the fault and explains what’s wrong. If it’s unsafe, it will be disconnected or labelled as not to be used. We’ll confirm a price for the repair in writing before any work goes ahead.

 

 

No. The legal duty covers appliances and flues you provide as the landlord. Appliances the tenant owns are their responsibility, although we’re happy to check them while we’re there.

 

 

In England, landlords must fit a CO alarm in any room with a fixed combustion appliance, excluding gas cookers. We can fit or replace alarms during the same visit.

 

Yes. Account clients get portfolio pricing, one point of contact, and certificates logged for every property. See our account clients page for details.