Thinking about replacing your old boiler in 2025? You are not alone — soaring gas prices, condensing-boiler regulations and the move toward smart heating mean Lancashire homeowners are upgrading at record numbers.
The trouble is, googling “new boiler cost Burnley” throws up wildly different prices: from £900 cheap-and-cheerful installs to £5,000+ premium quotes. So what does a proper, fixed-price boiler installation actually cost in 2025 — and what should be included?
1. Combi boiler swap (like-for-like) — from £1,550
If you already have a combi boiler in roughly the same place and the rest of your system is in decent shape, a like-for-like swap is the cheapest option.
- Main combi: from £1,550 fully fitted — best for budget installs and 1–2 bed properties (5-year warranty).
- Baxi 800 combi: around £2,250 — our most-fitted boiler for 2–4 bed homes (10-year warranty).
- Worcester Bosch 8000: from £2,800 — premium reliability with up to a 12-year warranty.
What that price includes: the boiler, fitting, chemical flush of the system, MagnaClean filter, old boiler removal, Gas Safety Certificate (CP12), Building Compliance notification, and VAT. No drip-fed extras.
2. System change (regular → combi) — from £2,800
Converting an older “regular” boiler with a hot-water cylinder and loft tanks to a modern combi is a popular upgrade — you free up loft and airing-cupboard space, get mains-pressure hot water, and run more efficiently.
Expect to pay £2,800 – £4,000 depending on:
- Boiler choice (Main / Baxi / Worcester)
- Whether the cold-water tank and cylinder need removing
- Pipework alterations and where the new flue exits
- Whether old radiators need swapping or rebalancing
3. New unvented cylinder system — from £3,500
If you have a larger Lancashire home (4+ bedrooms, 2+ bathrooms) and want powerful mains-pressure hot water everywhere, an unvented cylinder system with a system or regular boiler usually outperforms a combi.
A typical Megaflo or Telford unvented install plus a new system boiler is in the £3,500 – £5,000 range — and yes, every Gas Tech engineer is fully G3 qualified to install them.
4. The hidden costs to watch out for
Cheap quotes often leave these out — and you only discover them when the invoice lands:
- Magnetic filter — manufacturers like Worcester require one fitted to keep the warranty valid. We include it.
- System flush — chemical flush minimum, full powerflush on older sludged systems. Not optional.
- Building Regs notification — your installer is legally required to notify Building Control. This is included in our price.
- Smart thermostat upgrade — Hive, Nest or tado° fitted at the same time saves a separate callout. About £180–£260 fitted.
- Old boiler removal — we take it away. Not all installers do.
5. So what will it actually cost your home in 2025?
The honest answer: somewhere between £1,550 and £5,000, depending on bedroom count, hot-water demand and whether your existing system needs upgrading. The only way to get a real number is a free fixed-price survey — we usually quote within an hour and can install as quickly as the next day.
6. What our Burnley customers paid in early 2025
Real numbers from real Lancashire installs this year:
- BB10, 2-bed terrace: Worcester Bosch 2000 combi swap — £1,795
- BB11, 3-bed semi: Baxi 800 combi swap with smart stat — £2,395
- BB12, 4-bed detached: System → combi conversion (Worcester 8000) — £3,485
- BB7 (Clitheroe), 5-bed: System boiler + Megaflo unvented cylinder — £4,650
FAQs — Burnley boiler replacement 2025
How long does a boiler swap take?
Most like-for-like combi swaps are done in a single working day (8am – 4pm). Conversions take 1–2 days.
Can I get the install on finance?
Yes — ask us about 0% APR options on most installs (subject to status).
Do you cover Burnley, Padiham and Nelson?
Yes — and Colne, Clitheroe, Brierfield, Accrington, Blackburn and Preston. See our full coverage area.
Get a real Burnley boiler quote in 60 seconds
Send us a quick message with your postcode, current boiler and how many bedrooms — we'll come back with a fixed price the same day. No pushy salesman, no jargon, just an honest number.