The Meadows, Sunderland Bridge, Durham, DH6 5HD Open 24/7 — including weekends & bank holidays
Emergency Callout: 07450 300142
Available 24/7 across Durham & the North East

Honest, reliable heating & plumbing — done right the first time.

Gas Safe and OFTEC registered engineers covering Durham, County Durham and the wider North East. Boilers, heat pumps, bathrooms, kitchens and emergency plumbing — domestic and light commercial up to 70kW.

Request a Free Quote 07450 300142
Gas Safe Registered
OFTEC Registered
Free, No-Obligation Quotes
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Gas Safe & OFTEC
Why Thermal Heating Co

The dependable name for heating & plumbing in Durham

From rapid emergency callouts to full bathroom renovations and renewable heat pump installations, we do it all — safely, transparently and to a standard you'd expect from your own family's tradesman.

Gas Safe & OFTEC Registered

Fully accredited for gas, LPG and oil work — every job certified and lodged with the relevant authority for total peace of mind.

24/7 Rapid Response

No-heat or no-hot-water emergency? We're on call around the clock, every day of the year, including weekends and bank holidays.

Honest, Transparent Pricing

"British Gas had quoted me nearly double" — Pauline, Durham. We give straight answers, fair quotes and no upselling. Ever.

Domestic & Light Commercial

Homes, landlords, shops, salons, small offices — fully equipped to handle systems up to 70kW with the right paperwork to match.

Our Services

Everything your home needs — under one roof

From a leaking tap to a full bathroom refit, a one-off boiler service to a renewable heat pump installation. One trusted local team, end-to-end.

Heating

Central Heating

Full system design, installation, upgrades and servicing — including radiators, valves, controls and powerflushing.

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Boilers

Boiler Installation & Repairs

New boilers, swaps and emergency repairs across all major brands. Annual servicing and landlord certificates.

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Plumbing

Plumbing & Emergency Callouts

Leak detection, pipe repairs, blocked drains and 24-hour emergencies — same-day fixes, no fuss.

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Bathrooms

Bathroom Installation & Renovation

Full bathroom fit-outs from first-fix plumbing through to fixtures, tiling and finishing — managed end-to-end.

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Kitchens

Kitchen Plumbing & Installation

Appliance fitting, pipework, sink and tap installation. Ideal as part of a kitchen renovation or upgrade.

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Renewable

Heat Pumps & Underfloor Heating

Air-source and ground-source heat pumps, plus wet underfloor heating systems — eco-friendly comfort, lower bills.

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Engineer servicing a boiler Plumbing tools laid out
5★ Rated by customers across Durham
What's Included

Every job comes with our promise

Whether it's a quick repair or a full renovation, every Thermal Heating Co visit is held to the same standard. No surprises, no shortcuts.

  • Fully accredited engineers

    Gas Safe & OFTEC registered for gas, LPG and oil systems.

  • Free written quotes

    Clear, itemised pricing — no obligation, no high-pressure sales.

  • 24/7 emergency cover

    Day, night, weekend or bank holiday — you can always reach us.

  • Tidy, respectful workmanship

    "All areas left clean and tidy afterwards" — Sarah, customer.

  • Workmanship guarantee

    Every installation backed by our promise — and the manufacturer warranty.

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Customer Reviews

Don't take our word for it

Real reviews from real customers across Durham & County Durham.

★★★★★

"Boiler service, one radiator moved and a new one fitted. All work completed in timely fashion, all to a high standard, and all areas left clean and tidy afterwards."

S
SarahBoiler installation
★★★★★

"I called Thermal Heating when I needed my boiler replacing — British Gas had quoted me nearly double. As an elderly person I'm a bit tentative, but they really looked after me and even sat and explained the new thermostat. Couldn't recommend more."

P
PaulineDurham
★★★★★

"Needed our annual boiler service. We were booked straight in and Marcus turned up on time and carried it out. He took the time to explain the different settings on the boiler — I didn't have a clue. Really good company to deal with."

J
JanAnnual boiler service
★★★★★

"Came to the rescue. Serious plumbing problem with our main toilet. Carried out the repair same day. An excellent job — 5 rating."

J
JohnDurham — emergency plumbing
★★★★★

"Boiler service, one radiator moved and a new one fitted. All work completed in timely fashion, all to a high standard, and all areas left clean and tidy afterwards."

S
SarahBoiler installation
★★★★★

"I called Thermal Heating when I needed my boiler replacing — British Gas had quoted me nearly double. As an elderly person I'm a bit tentative, but they really looked after me and even sat and explained the new thermostat. Couldn't recommend more."

P
PaulineDurham
★★★★★

"Needed our annual boiler service. We were booked straight in and Marcus turned up on time and carried it out. He took the time to explain the different settings on the boiler — I didn't have a clue. Really good company to deal with."

J
JanAnnual boiler service
★★★★★

"Came to the rescue. Serious plumbing problem with our main toilet. Carried out the repair same day. An excellent job — 5 rating."

J
JohnDurham — emergency plumbing
Service Areas

Proudly serving Durham & the North East

Based in Sunderland Bridge and covering the whole of County Durham and surrounding areas. If your postcode isn't listed, just give us a call.

DurhamCity & suburbs
Sunderland BridgeDH6
SpennymoorDL16
Bishop AucklandDL14
Chester-le-StreetDH2 / DH3
ConsettDH8
Newton AycliffeDL5
SunderlandSR & surrounding
How We Work

A simple, stress-free process

From first call to final fix — we make sure you know what's happening, what it costs, and when it'll be done.

Engineer on phone with customer
1

Get in Touch

Call, WhatsApp or fill in the form. We'll pick up 24/7, even at the weekend.

Engineer assessing a boiler
2

Free Site Visit & Quote

We come round, take a proper look and write up a clear, itemised quote — no obligation.

Plumber working on a heating system
3

Booked & Done Right

Pick a date that suits you. We turn up on time, work cleanly and finish to a high standard.

Engineer completing paperwork
4

Certified & Aftercare

You get all the paperwork — Gas Safe / OFTEC certs — plus our number for any follow-ups.

Renewable Heating

Future-ready heat pump & underfloor systems

Cut your bills, cut your carbon footprint and stay warm all year round. We design and install air-source & ground-source heat pumps, plus wet underfloor heating systems — all signed off properly and built to last.

  • Lower running costs

    Up to 3–4× more efficient than a traditional gas or oil boiler.

  • Greener home

    Significantly reduce your home's carbon emissions year-on-year.

  • Future-proof

    Compliant with the UK's roadmap to phase out gas boilers by 2035.

  • Quieter & more comfortable

    Even, gentle warmth across every room — no cold spots.

Talk to a heat pump engineer
Heat pump installation Underfloor heating installation

Trusted brands & accreditations we work with

Tips & Insights

Advice from the engineers

Practical tips to keep your boiler, plumbing and heating running at its best — straight from the workshop floor.

Boilers5 min read

When is it worth replacing your boiler instead of repairing it?

The honest answer to one of the most common questions we get asked across Durham.

Heat Pumps7 min read

Are heat pumps actually any good in a North East winter?

What the marketing won't tell you — and what we see on real installs across County Durham.

Plumbing4 min read

Burst pipes: what to do in the first 5 minutes

The quick steps that can save you thousands while you wait for an emergency engineer.

Engineer on the phone with a customer
Got a quick question?Call us 24/7 on 07450 300142
FAQs

The questions we get asked most

Can't see what you're looking for? Give us a call or drop us a message — happy to help.

Yes — every gas engineer at Thermal Heating Co is Gas Safe registered, and we're also OFTEC registered for oil and LPG work. You can ask to see ID on any visit.
Yes. Our line is open 24 hours a day, 7 days a week — including weekends and bank holidays. If you're without heat, hot water or have a leak, give us a ring straight away.
No — quotes are completely free and there's no obligation. We'd rather give you honest pricing up front than surprise you halfway through a job.
Yes — we cover domestic and light commercial up to 70kW. Shops, salons, small offices, landlords — we've got the right paperwork and accreditations to handle it.
Absolutely. We design and install both air-source and ground-source heat pumps, alongside conventional gas, oil and LPG systems. We'll talk you through which option suits your home and budget best.
We're based in Sunderland Bridge, Durham (DH6 5HD) and cover Durham, County Durham and the wider North East — including Sunderland, Spennymoor, Bishop Auckland, Chester-le-Street, Consett, Newton Aycliffe and beyond.
Ready When You Are

No heat? Leak? Planning a new bathroom?

Whatever the job — emergency or planned — we're a phone call away. Honest advice, fair quotes, fast turnaround.

Call 07450 300142 WhatsApp Us