New Boiler Cost in Bath — Honest, Fixed Prices
Trying to work out what a new boiler should actually cost in Bath? You’ve probably had one quote that seemed too cheap to be real and another that made your eyes water. This page gives you the straight version — real price ranges by boiler type and property, exactly what’s included in our fixed price, and the “extras” other firms leave off the quote so the number looks smaller.
No sales pressure, no vague “from £X” figures. Just honest pricing from Gas Safe registered engineers who live and work here in Bath.
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✔ Gas Safe Registered (622049) ✔ Viessmann Accredited Installer ✔ Worcester Bosch boilers installed ✔ Fixed prices with no hidden extras ✔ Manufacturer warranties up to 10 years (where available)
How Much Does a New Boiler Cost in Bath?
For most Bath homes, a straightforward combi boiler replacement costs between £1,800 and £4,000 fully fitted — the average landing around £2,300. That covers the boiler, the labour, and a like-for-like swap where the new boiler goes roughly where the old one was. Premium models and larger homes can sit at the top of that range or a little above.
Where you land comes down to the type of boiler, the brand, and how much work is involved. Here’s the honest breakdown:
| Job | Typical Bath price (fully fitted) | What it usually covers |
|---|---|---|
| Combi swap (like-for-like) | £1,800 – £4,000 | New combi where the old one was, budget to premium brand |
| System boiler (with cylinder) | £2,000 – £4,200 | Homes with a hot water cylinder and higher hot water demand |
| Regular / heat-only boiler | £1,900 – £3,600 | Traditional setup with tank in the loft, kept as-is |
| System or regular → combi conversion | £3,500 – £5,500 | Removing the cylinder/tanks, new pipework, more of a project |
| Back boiler → combi conversion | £3,500 – £6,000 | Old boiler behind the fireplace, new one relocated |
Boiler Prices by Property Type — Bath Isn’t a “Standard” Town
Bath and the villages around it are mostly older, characterful housing, and that has a real effect on price. A boiler swap in a modern estate is a different job to one in a Georgian townhouse with three floors and a basement. Here’s how it tends to play out locally:
Victorian & Edwardian terraces (Oldfield Park, Bear Flat, Twerton) — Usually a combi tucked in the kitchen or a bedroom cupboard. Straightforward swaps sit at the lower-to-middle end, £1,800–£2,800. Older, undersized pipework can add a little if it needs upgrading.
Georgian townhouses & city-centre flats (central Bath, Bathwick, Lansdown) — Multiple floors, long pipe runs and awkward flue positions push these towards £2,500–£4,000. If the property is listed or in a conservation area, flue and siting rules matter.
1930s–1970s semis (Combe Down, Odd Down, Keynsham) — Often still running an old regular boiler with a tank in the loft. A like-for-like is affordable; a combi conversion to free up the airing cupboard runs £3,500–£5,500.
Modern estate homes (Peasedown St John, Saltford, newer Keynsham builds) — Modern pipework and easy access make these the cleanest, quickest installs, usually at the lower end of the range.
Village cottages (Timsbury, Farmborough, the outlying villages) — Thick stone walls, tight spaces and sometimes older setups can make the job a bit more involved, so these vary — we’ll always look before we price.
Not sure which one you are? Get an instant quote and we’ll tell you exactly.
What Affects the Cost of Your New Boiler
Four things move the price more than anything else. Understanding them helps you compare quotes properly instead of just picking the cheapest number.
Moving the boiler to a new spot
Leaving the boiler where it is keeps the price down. Moving it — say, from a bedroom to the kitchen, or freeing up a cupboard — means new gas, water and flue runs, plus making good afterwards. Expect £300–£800+ on top depending on the distance and how much pipework has to be rerouted.
Converting from a back boiler or old system
If you’ve still got a back boiler behind the fireplace, or a regular boiler with tanks in the loft, switching to a modern combi is a bigger job — removing the old unit, cylinder and tanks, running fresh pipework, and often patching plaster. That’s why conversions run £3,500–£6,000 rather than the price of a simple swap. It’s worth it: you free up space, get better hot water, and cut running costs.
Listed buildings & conservation areas
This one is pure Bath. A lot of the city is listed or sits in a conservation area, which affects where a flue can go and whether external pipework is allowed on show. Sometimes the flue has to be routed internally or repositioned, which adds labour. We know the local rules and how to do it properly and sympathetically — so you pass any checks and don’t fall foul of the council. It’s exactly the kind of thing a firm from out of town gets wrong.
The brand and warranty you choose
The boiler itself is a big chunk of the price. Budget units start around £600–£1,100, mid-range £1,100–£2,000, and premium models go above that. We install trusted boiler brands including Viessmann and Worcester Bosch, with manufacturer warranties of up to 10 years where available (subject to the product and registration). A longer warranty is worth real money, so factor it in when you compare quotes rather than just looking at the headline install price.
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What’s Included in Our Fixed Price (and the Extras Others Leave Off)
This is where a lot of quotes get misleading. A rock-bottom price often means the essentials have been stripped out, then added back as “extras” once the work starts. Here’s our fixed price versus what you’ll often find bolted on elsewhere:
Included in every Bath Eco Heat fixed price:
- The boiler, fully supplied and fitted
- All standard gas, water and flue connections
- A magnetic filter — protects your new boiler and keeps the warranty valid (many firms charge £80–£150 extra for this)
- A system flush to clear out old debris
- Full manufacturer warranty registered on your behalf (up to 10 years where available)
- Building Regs / Gas Safe notification sorted for you
- Tidy-up and a proper handover so you know how it all works
Common “hidden extras” you’ll see on cheaper quotes:
- Magnetic filter added on afterwards — £80–£150
- Powerflush quoted separately once they see the system — £300–£600
- Smart thermostat (Nest, Hive, Worcester Wave) not included — £150–£300 fitted
- Chemical inhibitor or new controls “not budgeted for”
- Making good / plastering left for you to sort
We’d rather quote you the real number once, so there are no nasty surprises on the day. If something genuinely isn’t needed, we won’t put it on.
Why Get Your Quote From Bath Eco Heat
We’re a local Bath heating company, not a national call centre that subcontracts the work out. When you call, you deal with the engineer doing the job.
- Gas Safe registered — registration number 622049, so you know the work’s done legally and safely
- Quality boilers — Viessmann Accredited, and we install trusted brands including Worcester Bosch, with warranties up to 10 years where available
- Fixed pricing — the number we quote is the number you pay
- Local knowledge — we understand Bath’s older housing, listed buildings and conservation rules
- Real reviews — homeowners across Bath rate us for turning up when we say and doing the job properly
Get Your Fixed Boiler Price — No Obligation
Tell us a bit about your home and we’ll give you an honest, fixed price for your new boiler. No pressure, no sales visit unless you want one.
📞 Call 01225 970248 | 💬 WhatsApp us
Gas Safe Registered 622049 · Serving Bath and surrounding villages · Fixed prices, no hidden extras
Related: Boiler Installation · Boiler Servicing · Boiler Repairs · Heat Pumps · Areas We Cover · Get an Instant Quote
New Boiler Cost Bath — Your Questions Answered
How much does a new boiler cost in Bath?
Most combi boiler replacements in Bath cost between £1,800 and £4,000 fully fitted, with the average around £2,300. System and regular boilers are similar, while conversions (back boiler or system-to-combi) run £3,500–£6,000 because there’s more work involved. The exact price depends on the boiler, the brand, and your property.
Why are boiler quotes so different from one company to another?
Usually because they don’t include the same things. A cheaper quote often leaves off the magnetic filter, system flush, controls or making-good — then adds them once the job starts. Always compare what’s actually included, and check the warranty length, not just the headline price.
How much does it cost to move my boiler to a different room?
Moving a boiler adds roughly £300–£800+ on top of the standard price, depending on how far it’s going and how much new gas, water and flue pipework is needed. Freeing up a cupboard or moving to the kitchen is common — we’ll price it properly upfront.
How much is a back boiler conversion in Bath?
Converting an old back boiler (behind the fireplace) to a modern combi typically costs £3,500–£6,000. It’s a bigger job because the old unit is removed and the new boiler is usually relocated, with fresh pipework and some making-good afterwards.
Can I fit a combi boiler in a listed or Georgian building in Bath?
Yes, in almost all cases — but the flue position and any external pipework have to respect listed-building and conservation-area rules, which are common across Bath. We know the local requirements and install sympathetically so it’s done properly. This is worth getting a local, experienced engineer for.
What’s included in your fixed price?
Everything you need for a complete job: the boiler supplied and fitted, all standard connections, a magnetic filter, a system flush, warranty registration (up to 10 years where available), and all the Building Regs and Gas Safe notification. No essentials stripped out to make the price look smaller.
How long does a new boiler installation take?
A straightforward combi swap is usually a single day. A system-to-combi or back boiler conversion is typically two days because of the extra pipework and removal work. We’ll tell you exactly when we quote.
What warranty do you offer on a new boiler?
We install trusted brands including Viessmann and Worcester Bosch, with manufacturer warranties of up to 10 years where available, depending on the boiler you choose and how it’s registered. Keeping up your annual service keeps that warranty valid.
Is the cheapest quote worth it?
Not always. A very low quote often means corners cut, essentials left off, or a short warranty. We’d rather give you one honest, fixed number that covers the whole job — so it’s done right and there are no surprises on the day.