Gas Safe registered engineers for boiler installs, breakdowns, plumbing and renewables across Oxfordshire. Tell us what’s wrong and you’ll have a fixed-price quote — not a vague estimate — the same day.
⭐⭐⭐⭐⭐ 4.9 / 5· 500+ verified reviews
Every quote is fixed before work starts, carried out by a Gas Safe registered engineer, and covered by a 12-month workmanship guarantee.
A new A-rated boiler, sized properly for your property, installed in a day by the same engineer who surveyed it. No sales agents, no subcontractors, no surprise second visit.
Fitted from
Typical job
Warranty
Cold house, no hot water, or a fault code you’ve never seen before. We diagnose all makes and models, carry the common parts in the van, and give you the repair price before we start.
Diagnostic from
On site within
Repairs guaranteed
Air source and ground source systems designed around a proper heat-loss survey — not a rule of thumb. We handle the Boiler Upgrade Scheme paperwork so the grant comes off your quote, not your patience.
F-Gas registered installs for homes, offices, shops and server rooms. Modern inverter units heat as efficiently as they cool, so the same box keeps you comfortable in February and August.
The same trusted engineers, honest fixed pricing, and the same workmanship guarantee.
Annual service that keeps your warranty valid and catches faults before winter does. Landlord gas safety certificates issued same day.
Taps, toilets, radiators, stopcocks, pipework and everything in between. Reliable fixes with minimal disruption and floors left as we found them.
Thermal imaging and acoustic tracing to pinpoint a leak without lifting your floor or taking down a ceiling. Reports accepted by insurers.
Full bathrooms from concept to completion — tiling, fixtures, plumbing and electrics, managed by one team so nobody blames anybody else.
Wood pellet and log boilers for rural and off-grid properties. A sustainable, cost-effective alternative where mains gas was never an option.
Planned maintenance and emergency cover for offices, schools, pubs and light industrial sites. Priority response and one named account engineer.
Two decades of Oxfordshire heating work, and the habits that come with it.
For genuine emergencies we aim to be with you within two hours, anywhere in the county. A heating failure in January isn't a next-week problem.
Gas Safe registered, OFTEC certified, F-Gas registered and manufacturer-trained. We'll show you the card before we touch anything.
Fixed-price quotes with no hidden extras. If we find something unexpected, we stop and re-quote — we never just add it to the invoice.
Minimum twelve months on every job we do, on top of the manufacturer's warranty on parts. If it isn't right, we come back.
Based in Oxfordshire, working in Oxfordshire. Our engineers know the estates, the old stock, the awkward loft conversions and the back lanes.
Our 24/7 line is answered by someone who can actually book an engineer — not a voicemail, a chatbot or an overseas call centre.
Four steps, and you’ll know exactly where you stand after the second one.
Tell us the job, your postcode and how urgent it is. It takes about a minute.
An engineer — not a salesperson — calls to confirm the details and book a slot that suits you.
We survey, then quote in writing. No pressure, no expiring discounts, no obligation to go ahead.
Job completed, tested and tidied. Then annual service reminders and 24/7 backup if you ever need us.
From central Oxford to the rural Cotswolds, our engineers are never far away. Most areas get an emergency response inside two hours.
For genuine emergencies — no heating, no hot water, a suspected gas leak or a burst pipe — we aim to have an engineer with you within two hours, anywhere in Oxfordshire. Our line on 01295 408100 is answered 24 hours a day, 365 days a year, by someone who can book the visit there and then.
Is the quote really fixed,It’s fixed. You’ll get the number in writing before any work begins, and that’s what you pay. If we open something up and find a problem nobody could have seen from the outside, we stop, explain it and re-quote — you decide whether to go ahead. Nothing gets added to the invoice after the fact. or does it creep?
A straightforward combi swap typically starts around £1,895 fitted. The final figure depends on the boiler you choose, whether the position is changing, and what condition the existing system is in. The survey and the quote are free, so the fastest way to a real number is to send the form or ring us.
Every engineer is Gas Safe registered, and depending on the work also OFTEC certified, F-Gas registered and manufacturer-trained. We’re a Vaillant Advance Installer, a Worcester Bosch Accredited Installer and a CIPHE Registered Plumbing Company. Ask to see the card on arrival — a good engineer expects it.
Every job carries a minimum 12-month workmanship guarantee. New boilers also come with the manufacturer’s warranty, which runs up to 12 years on some models when installed by an accredited installer and serviced annually.
All of Oxfordshire and the surrounding counties — Banbury, Oxford, Bicester, Brackley, Chipping Norton, Warwick, Leamington Spa and Stratford-upon-Avon among them. If you’re not sure whether you’re in range, put your postcode into the checker above or just ring us.
Yes. We issue landlord gas safety certificates, and we run planned maintenance and emergency cover contracts for offices, schools, pubs, shops and light industrial sites — with priority response and one named account engineer who knows your building.
Whether it’s a planned installation or a heating emergency, the engineers are ready for your call.
Free quotes · No call-out charge on quoted work · 12-month guarantee.
© 2026 Biotech Heating Services Ltd · Gas Safe registered · Serving Oxfordshire since 2003
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