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Gas Leak Detection
in London & the Home Counties.

Certified Gas Safe engineers on-site within 1–2 hours for suspected leaks, faults, and gas safety concerns — securing your property fast, with no hidden costs.

Book A PrimeFix Gas Leak Detection Engineer

Book A PrimeFix Leak Detection Engineer
Starting from £60/half hour

Gas leak detection and safety inspections

A gas leak doesn’t wait for convenient timing. It can start as a faint smell near an appliance, an unexplained hiss near a meter, or a boiler that won’t hold pressure — and it’s not something to investigate yourself. By the time a leak is obvious, the property may already be at risk.

That’s why we treat every call as urgent. Certified Gas Safe engineers attend within 1–2 hours, secure the area, and carry out a full safety audit before anything else happens. Once the source is confirmed, we explain the problem, carry out the repair, and can provide documentation for landlords, insurers, or building management where needed.

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Mohammad Fazal (John) profile picture
Mohammad Fazal (John)
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Professional A Team These guys are brilliant, honest and do what they say. Not Just that, they also go extra mile. I highly recommend these guys

Owner's reply
Hi Mohammad , We really appreciate your feedback. And we’re delighted you’re happy with the service provided.
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M N profile picture
M N
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Never in my life have I come across a company this professional 👌🏻They explained everything clearly from the start and found and fixed the leak under my shower tray without breaking a single tile. They even put the shower tray and screen back perfectly like nothing had ever happened. Another company quoted me more than double the price, but these guys charged £727 and did an amazing job. Both engineers were amazing.Definitely the best around. Highly recommend.

Owner's reply
Hi Mr Maxwell, Thank you so much for your kind review. We really appreciate you taking the time to leave us your feedback. Our clients always come first,and we’re glad to hear you were happy with the service.
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A P profile picture
A P
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James arrived promptly on time. Extremely professional, quick and efficient. I have no hesitation in highly recommending Geldon and James. I will definitely contact them when I update my radiators later in the year. Thank you for an excellent service from start to finish.

Owner's reply
Hi Alison, Thank you so much for taking time to leave such wonderful feedback. We’re delighted to hear that James & Geldon provided a prompt, professional and efficient service and we will make sure your review its forwarded to our engineers 🙏🏻
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Angie G profile picture
Angie G
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Chris V was very helpful, and polite, turned up on time, did a thorough investigation to find out a damp patch on the carpet wasn't a pipe leak which was reassuring.

Owner's reply
Thank you so much for your kind review, We’re delighted to hear Chriss provided a thorough and reassuring service. We really appreciate your feedback and are always here if you need us again.
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Charlie Y profile picture
Charlie Y
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Jim, spent a lot of time finding the issue and double checking no other sources, doing numerous tests I have seen no other plumber do. Giving advice with a friendly smile, leaving with a happy customer. Thanks again

Owner's reply
Thank you for the wonderful review,Charlie! We’ll be sure to pass your kind words on to Jim. We really appreciate we could provide through the service you deserved.
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Andreea Ionela profile picture
Andreea Ionela
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Great work, highly recommended! 💯 Thank you so much!

Owner's reply
Hi Andreea, Thank you for your kind words! We’re delighted you had a great experience.
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Betty Cawely profile picture
Betty Cawely
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Aleks from PrimeFix found my leak in an area I would never have expected. It took some time and wasn’t a cheap job, but it was a very difficult leak to find. He worked carefully and managed to locate it with minimal damage. Big thanks to Aleks and the PrimeFix team for their hard work and professionalism. Highly recommended.

Owner's reply
Hi Betty , Thank you for your kind words and recommendation. We’re glad Aleks was able to find the leak and keep the exposure damaged to minimum. We really appreciate your support
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ray fahti profile picture
ray fahti
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Owner's reply
Hi Ray , Thank you for the feedback
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Matt Conroy profile picture
Matt Conroy
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Excellent work with promised support if needed after plumbing in our wunder underfloor heating. Would reccomend 👍🏼

Owner's reply
Hi Matt , Thank you and we really appreciate the feedback. Gland we would help and of course we’re always here if you need any further support in the future 🙏🏻
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Kirsty Brown profile picture
Kirsty Brown
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⭐️⭐️⭐️⭐️⭐️ We had an underground leak at my 88-year-old mother’s property and contacted Prime Fix Group Ltd. The engineer arrived promptly and, after carrying out an assessment, called me directly to explain the issue, the required work, and all costs involved, as he did not want to stress my mother with the situation. Very professional service from start to finish with no hidden fees at all. Everything was explained clearly before any work was carried out. We submitted the report to our insurance company, who recognised Prime Fix as highly qualified engineers. Highly recommended.

Owner's reply
Hi Mr Brown, Thank you for your kind words and recommendation. We’re glad we could help and make the process as stress-free as possible for your mother

Gas Safe on every job

Every engineer is Gas Safe registered, so all work meets current safety regulations from the first inspection to the final sign-off.

We only quote once we know what's wrong

Diagnosis comes first, then a confirmed price before any work starts. No call-out fee.

Same-day fixes where it counts

Suspected leaks get priority scheduling. Most call-outs are attended and made safe within 1–2 hours.
Gas Leak Detection
Gas Leak Detection
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Gas Leak Detection

Talk to a Heating & Gas Specialist 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.

How We Secure Your Property and Track Down the Fault

Every job follows the same process, in the same order. We isolate the risk first, then investigate. Here’s what happens when we attend a gas safety call-out.

Heating & Gas - Boiler Breakdowns & Repairs

Emergency Isolation

Rapid intervention to safely shut down the gas supply and eliminate immediate fire or health risks, before any diagnostic work begins.

Gas Leaks Detection - Gas Tightness Testing

Gas Tightness Testing

Rigorous pressure checks across the entire gas installation to confirm there's no undetected leak anywhere in the system.

Heating & Gas - Landlord Gas Safety Certificates (CP12)

Meter & Appliance Diagnostics

A full inspection of the gas meter, supply lines, and connected appliances to resolve flow, pressure, or fault issues.

Gas Leaks Detection - Carbon Monoxide Audit

Carbon Monoxide Audit

Testing for the "silent killer" to make sure boilers and flues are venting correctly and safely.

Gas Leaks Detection - Corroded Pipework Inspection

Corroded Pipework Inspection

Identifying aged or damaged gas pipework that's compromising the integrity of the system.

Gas Leaks Detection - Flue & Ventilation Testing

Flue & Ventilation Testing

Confirming appliances have adequate airflow and that exhaust gases are being safely removed from the property.

Transparent Gas Leak Detection Pricing, Always

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

CALL-OUTS & REPAIRS

Half-Hour Rates

Charged in 30-minute increments 1h after arrival. No call-out fee. From £120 +VAT for the first hour.

ACCOUNT CLIENTS

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 Specialists

Real engineers, real qualifications. The same trusted faces who’ll be at your door, not a subcontractor you’ve never met.

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

Arber J | 25+ Years Experience

NVQ Level 2 & 3 | Fully Qualified Electrician | Inspection & Testing Qualified | PAT Testing Qualified

Chris V | 12+ Years Experience

NVQ Level 2 Drainage Construction CSCS Card OS19X CCTV Drainage Survey Qualified

Wherever you are, whatever your leak, our standards remain the same

One trusted team serving London and the home counties. The same standards, wherever you’re based.

Book a Prime Fix Gas 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.

Gas Leak Detection FAQs

Common questions about gas leak detection, answered plainly. If you don't see what you're looking for, call us on 02081080400 and we'll talk you through it.

How much does a gas leak call-out cost?

Our gas call-outs are charged hourly — £120 +VAT covers the first hour, then £60 +VAT for each half-hour after that. There’s no call-out fee, and you’ll get a confirmed price before anyone picks up a tool. Parking, ULEZ, congestion charge and fuel surcharges are never added on top.

 

We guarantee an on-site engineer within 1 to 2 hours of your call for suspected leaks or gas safety concerns, 24/7, 365 days a year.

 

Safety comes first. We isolate the affected supply, secure the area, and carry out a full tightness test and appliance check before any repair work begins.

 

Yes — our Gas Safe registered engineers carry out full CP12 inspections and certification for landlords, covering all gas appliances and flues on the property.

 

Warning signs include yellow or orange (rather than blue) boiler flames, soot marks around appliances, and condensation build-up. If you suspect a risk, leave the property, ventilate if safe to do so, and call us immediately — we test for carbon monoxide as standard on every gas safety visit.

 

Yes — every engineer holds relevant qualifications (NVQ Level 2/3, Gas Safe registration, NICEIC approval where the job calls for it), and PrimeFix itself is CHAS accredited and SafeContractor approved.