New boiler cost in Teesside, 2026
A new gas boiler in Teesside costs £1,800 to £3,600 fitted in 2026: like-for-like swaps at the lower end, relocations and conversions from £2,600 up. Flush, filter, controls and certification should be inside that price.
Boiler pricing looks opaque because quotes bundle very different things under one figure. Split it into appliance, labour and the works the property needs, and comparing becomes straightforward. These are realistic Teesside numbers for 2026, not national averages inflated by London labour rates.
The 2026 price table
| Job | Typical price | What moves it |
|---|---|---|
| Like-for-like combi swap | £1,800 to £3,200 | Output, brand, warranty length |
| New installation with position change | £2,200 to £3,600 | Pipework, flue route, making good |
| Conversion to combi from tank system | £2,600 to £4,200 | Cylinder and tank removal, rework |
| System boiler and unvented cylinder | £3,200 to £5,000 | Cylinder size, zoning, controls |
| Power flush (where needed) | £300 to £550 | Radiator count, system condition |
| Gas supply upgrade to 22mm | £150 to £400 | Run length, access, floor lifting |
What sits inside a fair price
A complete quote covers the appliance and its flue kit, removal and disposal of the old unit, a magnetic filter, a chemical or power flush appropriate to the system, inhibitor, compliant controls, condensate routed to a proper drain, commissioning with a flue gas analyser, the benchmark record and Building Control notification. If two quotes are £700 apart, one of these is usually missing rather than the labour being cheaper.
Where the money goes
Roughly, the appliance is a third to a half of a typical swap, labour is a day to two days, and the balance is materials and the works the property forces. Premium brands with twelve-year warranties cost more up front and are usually worth it on a boiler you intend to keep, but only if the conditions attached to that warranty, principally an annual service, are going to be met.
Extras worth budgeting for
Three items appear often enough to plan for. A gas supply upgrade where the existing run is 15mm and too long. A power flush where the system water is black and the radiators are cold at the bottom. And magnetic filter plus new thermostatic valves where the old ones are seized, which is common on systems over twenty years old. Together they can add £400 to £900, and each of them protects the new appliance.
Quotes that should worry you
A price given over the phone with no survey. A quote that names no model, no output and no warranty length. A "free power flush" thrown in with no explanation of whether the system needs one. And a deposit demanded before any paperwork exists. None of those are automatically dishonest, but all four correlate with disappointment.