✓ Verified Google reviews·✓ Reviewed regularly·✓ Updated 29 May 2026
Written by Mark Reid,
Trades Editor ·Verified 29 May 2026
Portsmouth's housing stock is a mixed bag, and that matters when you're hiring a gas engineer. You've got rows of Victorian and Edwardian terraces across Southsea and Fratton with ageing pipework and cast-iron radiators that haven't been touched in decades, alongside post-war semis in Paulsgrove and Cosham where the original back-boiler setups were ripped out years ago but the flue routes are still awkward. Then there are the newer builds on Tipner and around the waterfront, which tend to come with pressurised combi systems that need a gas engineer who knows the difference between a Worcestershire Bosch Greenstar and a Vaillant ecoTEC. Landlords around the student areas of Guildhall and Milton keep local engineers busy with annual gas safety checks, while owner-occupiers in Drayton and Widley are more likely to be booking full boiler replacements. The sea air doesn't help either. Salt corrosion on external flue terminals and condensate pipes is a genuine issue this close to the Solent, so an engineer familiar with Portsmouth-specific conditions is worth finding.
The businesses listed here were drawn from third-party business listings and ranked by public review rating and review count, with a small lift given to those that show a working website and phone number. Before any listing appears on this page, we check the business's homepage to confirm that gas engineering work is what they primarily offer, which is how plumbers who barely touch gas, or general tradespeople in unrelated categories, get kept off the list. Any listing flagged as permanently closed is removed automatically. Where you see a Trust Verified badge on a business, that means they've gone a step further and passed our full verification process, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history, and registered company information. You can find the full list of checks on our How We Verify page. Businesses without that badge haven't been independently verified by us, and you should carry out your own checks before booking.
Before you call anyone, there are a few things worth doing. Get at least two or three quotes, particularly for a boiler replacement, where prices in Portsmouth can range from around £1,800 for a straightforward combi swap to well over £3,500 if the flue position needs changing or the pipework requires upgrading. Ask any engineer you're considering whether they're Gas Safe registered and request their registration number so you can check it yourself on the Gas Safe Register website. For a new boiler installation, you're entitled to a Building Regulations compliance certificate (a CORGI Provis or Gas Safe notification), and your engineer should provide one automatically. If they don't mention it, ask. For a landlord gas safety check, make sure you receive a CP12 certificate with the engineer's Gas Safe number printed on it. Don't skip asking about what warranty they offer on parts and labour either, since some installers in the area offer two years on labour while others offer none at all.
How We Select & Rate The Best Gas Engineers in Portsmouth
Rankings on this page are driven by public review rating and review count, pulled from third-party business listings, with a small lift applied to businesses that have a working website and phone number. We check each business's homepage to confirm that gas engineering is what they primarily offer, which keeps unrelated trades off the page. Permanently-closed listings are removed automatically. Businesses marked Trust Verified have additionally passed our full verification covering qualifications, insurance, trading history, customer review history, and registered company information. See our How We Verify page for the full list. All other businesses on this page have not been independently verified by us, and inclusion is not an endorsement. Always do your own checks before hiring.
Positions 1–5 (Recommended and Featured) may be paid placements. Every other listing is ranked on rating and review count from third-party business listings. How we rank & verify →
CGE Southern provides gas engineering services to Portsmouth and the surrounding Southsea area from their base on Montgomerie Road. The company has earned a 5-star rating from 113 verified customer reviews, demonstrating their reliable service to local residents. They offer professional gas installation, maintenance and repair services throughout the PO5 postcode area.
Solent Plumbing & Heating Solutions provides gas engineering services to Portsmouth and the surrounding Southsea area from their base on Prince Albert Road. The company maintains a 5-star Google rating from 42 verified customer reviews, reflecting their reliable service for local residents and businesses. Their qualified gas engineers handle installations, maintenance, and repair work across the Portsmouth postcode areas.
Aqua Gas Heating and Plumbing (Southern) Ltd provides gas engineering services from their Hilsea base in Portsmouth. The company maintains a 5-star rating across 16 verified Google reviews, reflecting their work in the PO2 area. They offer professional gas heating and plumbing solutions for residential and commercial clients throughout Portsmouth.
CBW Plumbing & Heating provides gas engineering services throughout Portsmouth from their base in Drayton. The company maintains a 5-star rating from 7 verified customer reviews, reflecting their reliable service for local residents. They offer comprehensive plumbing and heating solutions for both domestic and commercial properties in the PO6 area and surrounding Portsmouth locations.
Homefield Heating provides gas engineering services to Portsmouth and surrounding areas from their base in Hilsea. The company maintains a 5-star rating across 6 verified customer reviews, reflecting their commitment to quality workmanship. Their services are accessible through Checkatrade, offering residents reliable gas installation, maintenance and repair solutions.
Fosters Gas & Heating Ltd provides gas engineering services to Portsmouth and surrounding areas from their base in PO3. The company maintains an excellent 5-star rating from 6 verified customer reviews on Google. Their qualified engineers handle gas appliance installations, repairs, and maintenance for residential and commercial properties.
R-GAS Heating Ltd provides gas engineering services from their Southsea base, serving Portsmouth and the surrounding area. The company maintains a 5-star Google rating based on 4 verified customer reviews. Their services include gas appliance installation, maintenance, and repair work for residential and commercial properties.
Heat Co Gas Limited provides gas engineering services to Portsmouth and the surrounding areas. The company has earned a perfect 5-star rating from 3 verified customer reviews, reflecting their reliable approach to gas installations, repairs and maintenance. Their qualified engineers handle both domestic and commercial gas work throughout the local Portsmouth community.
HB Gas Services provides gas engineering services to Portsmouth and the surrounding Southsea area from their Victoria Road South base. The company maintains a 5-star rating from 3 verified Google reviews, reflecting their commitment to quality workmanship. Their services cover the full range of gas engineering requirements for residential and commercial properties in the PO5 postcode area.
Transparency notice: Recommended (#1) and Featured (positions 2-5) listings may be paid placements, so a business's fee affects whether and where it appears in those positions. All other listings are ranked by a combined score drawn from ratings and review counts published on third-party business listings, plus basic completeness signals such as a working website and phone. A Trust Verified badge means we have independently checked that business's documents; businesses without it have not been independently verified by us. How we verify →
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Gas engineer callout fees in Portsmouth typically range from £60-£90, with hourly rates around £45-£65. Boiler services cost £80-£120, whilst new combi boiler installations run £1,500-£3,500 depending on the unit and complexity. Emergency weekend callouts can reach £120-£150. Prices vary based on the engineer's experience, job complexity, and your property's location. Getting two or three quotes gives you a realistic market rate and helps spot any unusual pricing.
How quickly can a gas engineer attend an emergency in Portsmouth?
Most Portsmouth gas engineers aim for same-day emergency attendance, typically within 2-4 hours during weekdays. Response times can stretch to 4-6 hours at weekends or during busy winter periods. If you smell gas, don't wait for your regular engineer - call the National Gas Emergency Service on 0800 111 999 immediately. For non-emergency breakdowns like no hot water, next-day appointments are usually available.
Do Portsmouth gas engineers work on older properties?
Yes, Portsmouth's gas engineers regularly work on Victorian and Edwardian properties throughout Southsea, Old Portsmouth, and Fratton. They're experienced with older pipework, back boilers, and unconventional installations common in period homes. However, extensive upgrades might be needed to meet current safety standards, particularly if you're replacing an old boiler. Always discuss any heritage property considerations upfront.
What's included in an annual boiler service in Portsmouth?
A standard boiler service includes checking gas pressures, testing safety devices, inspecting the flue, cleaning the heat exchanger, and verifying proper combustion. The engineer will test carbon monoxide levels and check for gas leaks. Most Portsmouth engineers provide a service report detailing any issues found. Annual services typically cost £80-£120 and help maintain your boiler warranty whilst identifying potential problems early.
Can gas engineers install smart thermostats in Portsmouth homes?
Most qualified gas engineers can fit smart thermostats, though some prefer to focus on gas work only. Installation typically costs £100-£200 including the thermostat, depending on your existing wiring and heating system complexity. Older Portsmouth properties might need additional electrical work. Ask about compatibility with your boiler model and whether they'll configure the smartphone app as part of the service.
How do I verify a Portsmouth gas engineer's qualifications?
Check their Gas Safe Register ID card matches their photo and covers the work type you need. Visit gassaferegister.co.uk to verify their registration number and see what gas work they're qualified for. Ask for recent customer references and check their Google reviews for patterns of good service. Legitimate engineers won't mind you verifying their credentials - anyone who objects should be avoided.
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