Boiler Installation Cost in London
£2,400–£5,850
typical range in London
In London, a boiler installation typically costs £2,400–£5,850 in 2026 — the UK-wide range is £2,000–£4,500, and the gap is local labour rates, not materials. Here is the full breakdown, what is included, and how to keep the price at the low end.
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What does a boiler installation cost in London?
Ranges below are the national breakdown adjusted for London labour rates. Every job is priced on survey — use these to sanity-check quotes, not replace them.
| Item | London range | Notes |
|---|---|---|
| Standard combi boiler swap (like-for-like location) | £2,150–£4,150 | Straightforward replacement of an existing combi boiler with a new model in the same location — the most common installation type |
| Combi boiler with flue extension or relocation | £2,650–£4,950 | Additional pipework or flue work required; adds 2–4 hours to the standard installation time |
| System boiler installation | £3,000–£5,850 | System boilers require a separate hot water cylinder; includes cylinder installation |
| Regular (heat-only) boiler installation | £3,350–£6,500 | Requires separate hot water cylinder and cold water tank; more complex installation |
| Conversion from regular to combi | £3,600–£7,150 | Removing the old cylinder and tank, adjusting pipework layout, and installing the combi — a full-day job minimum |
| New central heating system with boiler | £4,800–£10,400 | Installing radiators, pipework, controls, and boiler from scratch in a property without existing central heating |
| Smart controls and thermostat upgrade | £180–£520 | Smart thermostats (Nest, Hive, Tado) installed alongside the new boiler; often added to the installation quote |
Why do prices differ in London?
London labour rates run 20-30% above the national average, driven by cost of living, parking and congestion charges, and commercial rents — materials cost roughly the same nationwide.
London's stock is dominated by Victorian and Edwardian terraces and flat conversions, where access, shared freeholds and older wiring layouts add time to almost any job. Parking, congestion charging and ULEZ compliance are real line items for a tradesperson's day here, and they show up in quotes whether itemised or not.
Nationally, a boiler installation runs £2,000–£4,500; in London expect £2,400–£5,850. Get quotes from firms that actually cover your postcode — travel time is priced in whether you see it on the quote or not.
Common questions
We’re happy to answer all your questions.
How much does a boiler installation cost in London?
In London in 2026, a boiler installation typically costs £2,400–£5,850, against a UK-wide range of £2,000–£4,500. London's stock is dominated by Victorian and Edwardian terraces and flat conversions, where access, shared freeholds and older wiring layouts add time to almost any job. Parking, congestion charging and ULEZ compliance are real line items for a tradesperson's day here, and they show up in quotes whether itemised or not.
How much does a new boiler cost including installation in the UK?
A complete new combi boiler supply and installation in the UK costs £1,800–£3,200 for a standard like-for-like swap, rising to £4,000–£5,500 for conversions from regular to combi boiler. The boiler itself accounts for £600–£1,800 of the total; labour for the remainder. London and South East prices are typically 20–30% higher.
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Boiler Installation Costs elsewhere
Full national breakdown: Boiler Installation Cost