How Much Does a New Boiler Cost in Birmingham?
In Birmingham, a like-for-like combi boiler swap costs between £1,999 and £2,899 fitted depending on the model, and converting from an old cylinder system to a combi cost…
Quick answer
In Birmingham, a like-for-like combi boiler swap costs between £1,999 and £2,899 fitted depending on the model, and converting from an old cylinder system to a combi costs between £2,699 and £3,699. Those figures include the boiler, flue, wireless thermostat, magnetic filter, chemicals and Building Regulations notification.
Fitted prices by model
These are our published prices, not estimates that move at the door.
What changes the price
- Swap or conversion. Reusing existing pipework in the same position is the cheapest job. Removing a cylinder and loft tanks adds roughly £800.
- Moving the boiler. A new location means new gas, water, condensate and flue routes. Expect several hundred pounds more.
- Gas supply pipe. Older houses frequently have an undersized supply that will not deliver a modern boiler's input. Upgrading the run is common in Victorian terraces.
- System condition. A heavily sludged system needs a power flush at £550 before the warranty is safe.
- Flue routes. Vertical flues, long horizontal runs and plume management kits all add cost.
What should always be included
Compare quotes on what is inside them, not just the headline number. Ours include a horizontal flue, wireless thermostat, magnetic filter, chemical cleanser and inhibitor, removal of the old appliance, warranty registration and Building Regulations notification. A quote that is £300 cheaper but leaves out the filter and the chemicals is not cheaper — it is the same job with the warranty protection removed.
Is a bigger boiler better?
No. An oversized boiler cycles on and off, wears faster and costs more to run. Output should be matched to your radiator count and hot water demand. Most three-bedroom Birmingham semis are properly served by a 24–30kW combi, not the 35kW that gets sold on the basis that bigger sounds safer.
Warranty is the real long-term number
The Baxi 600 at £2,199 with a 7-year warranty often works out better value than a cheaper unit with 5 years, provided you keep up the annual service. Every one of these warranties is conditional on documented annual servicing — at £95 a year with us, that is the cheapest insurance on a £2,000 appliance you will find.
Should you replace at all?
If your boiler is under ten years old and this is its first significant fault, repair is usually the better spend. Past twelve years, on a second or third major part, replacement generally wins. We give both numbers and let you decide.
| Job | Price |
|---|---|
| Baxi / Main Eco Compact — combi swap (5 yr warranty) | £1,999 |
| Worcester Greenstar 1000 — combi swap (5 yr warranty) | £1,999 |
| Baxi 600 — combi swap (7 yr warranty) | £2,199 |
| Worcester Greenstar 4000 — combi swap (10 yr warranty) | £2,699 |
| Vaillant ecoTEC plus — combi swap (10 yr warranty) | £2,699 |
| Worcester Greenstar 8000 — combi swap (10 yr warranty) | £2,899 |
| Conversion to combi (from system/open vent) | from £2,699 |
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Written by the engineering team at Synergy Gas & Plumbing, Gas Safe registered 594385. Last reviewed August 2026.
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Answers
Common questions
How much is a new combi boiler fitted in Birmingham?
Between £1,999 and £2,899 for a like-for-like swap, depending on the model. Converting from a cylinder system to a combi runs from £2,699 to £3,699.
Are boiler prices different in Birmingham than nationally?
Broadly similar, though labour rates in the West Midlands sit a little below the national average and well below London. Our prices are the same across Birmingham, Solihull, Walsall, Dudley and Wolverhampton.
What size boiler do I need?
It depends on radiator count and hot water demand rather than house size alone. A typical three-bedroom semi is well served by a 24–30kW combi. Oversizing costs more to buy and more to run.
Do I need a power flush with a new boiler?
Only if the system is contaminated — but if it is and you skip it, the manufacturer can refuse a warranty claim. We test rather than assume, and every install includes a magnetic filter and inhibitor as standard.
Boiler playing up? We can usually get to you the same day.
Call the Birmingham office for a straight answer and a fixed price before we start work.