New combi boiler installation Wembley.
Supply and fit in a single day. Worcester Bosch, Vaillant or Ideal — your choice, my recommendation. Itemised quote within 24 hours of a site photo. No national-chain markup, no upselling, and the magnetic filter / inhibitor / system flush that protects your warranty is included as standard.
Right-sized for your home, not the installer's margin.
Six recent 2026 installs across Wembley HA9, Sudbury HA0 and Park Royal NW10 inform these prices. The bottom tier suits most 1-2 bed flats; the middle is the sweet spot for 3-bed terraces; the top is for 4-bed homes with two bathrooms.
Worcester Greenstar 2000 25kW
Best price-to-reliability ratio for small Wembley flats. 7-year manufacturer warranty.
- Like-for-like flue position
- Magnetic filter (MagnaClean Pro2)
- Chemical inhibitor (Sentinel X100)
- Full system flush
- Warranty registration
- 12-month workmanship guarantee
Worcester 4000 / Vaillant ecoTEC Plus
Quieter, better hot-water flow, 10-year warranty. The install I do most often in HA9.
- Choice of Worcester 4000 30kW or Vaillant ecoTEC Plus 832
- All entry-tier items, plus:
- Stainless steel heat exchanger
- Frost protection thermostat
- Smart thermostat compatible
- 10-year manufacturer warranty
Worcester 8000 Life / Viessmann Vitodens
Near-silent. Stainless heat exchanger. 12-year warranty. For homes with high hot-water demand.
- Worcester 8000 35kW or Viessmann Vitodens 100-W
- All mid-tier items, plus:
- Whisper-quiet operation
- Higher hot-water flow rate
- Premium 12-year warranty
- Smart-home integration
What's not included by default: long flue extensions over 4m (+£150-350), gas-meter upgrades (rare; only for >35kW), asbestos removal (rare in Wembley flats; £400-900 if found), and any structural building work around the flue route. All priced separately and clearly if applicable.
Manufacturer-trained on every major brand.
I'm trained and registered with Worcester Bosch, Vaillant and Ideal specifically — meaning warranties are activated directly with the manufacturer at the time of install. Other brands fitted on request.
The parts most quotes silently exclude.
These three items are required by Worcester, Vaillant and Ideal for the 10-year warranty. Some installers leave them out of the headline price and quietly hope you don't notice — and don't claim. I include all three in every install.
// Every install · standard, not extra
- Magnetic system filter (MagnaClean Pro2) — catches iron-oxide before it sludges radiators.
- Chemical inhibitor (Sentinel X100) — required for 10-yr warranty.
- Full system flush — chemical, mains-pressure, every radiator agitated.
- New filling loop — old ones leak; new is included.
- System pressure relief discharge to the correct location.
- Commissioning with flue gas analyser — combustion verified.
- Warranty registration — direct with the manufacturer.
- Building Control notification — Gas Safe handles this automatically.
- All rubbish removed — old boiler, packaging, pipework.
- 12-month workmanship guarantee — on top of the manufacturer cover.
From cold call to hot tap, in 3 days.
Photo + quote
Send a photo of your current boiler and flue exit. Itemised quote back to you within 24 hours, fixed-price.
24-hour turnaroundSite visit (optional)
For complex jobs (back-boiler relocation, long flue) I'll come round to confirm pricing before you commit.
30 minInstall day
Arrive 8am. Old boiler out by 11am. New one fitted, pipework done, commissioned by 4pm. Heat back on same evening.
1 dayPaperwork + warranty
Manufacturer warranty registered. Building notification submitted. Invoice + workmanship guarantee emailed.
Same weekQuoted £1,950 for a new Worcester combi. Fitted in a day, pipework looks like a piece of art. British Gas wanted £3,400 — same boiler, same job. Genuine bloke.
like-for-like swap
Worcester 8000 / Viessmann
Worcester Greenstar 2000
both included as standard
The honest answers most installers skip.
How much does a new combi cost in Wembley?+
From £1,895 fully fitted for a Worcester Bosch Greenstar 2000 25kW in a typical 1-2 bed Wembley flat with a like-for-like flue. £2,250-£2,650 for a mid-range Worcester 4000 or Vaillant ecoTEC Plus in a 3-bed terrace. £3,100-£3,650 for a Worcester 8000 Life or Viessmann Vitodens in a 4-bed house. Full breakdown with six real installs →
What's included in the install price?+
Supply and fit of the boiler, like-for-like flue, magnetic system filter, chemical inhibitor, full system flush, new filling loop, commissioning with flue gas analyser, warranty registration with the manufacturer, building-control notification, all rubbish removed, plus 12-month workmanship guarantee.
How long does a combi installation take?+
One full working day (8am–5pm) for a like-for-like swap. Two days for a relocation — for example moving from a back boiler behind a gas fire to a kitchen wall combi. Heat and hot water are back on by the end of day one in every install.
Which combi boiler should I choose?+
For most 1- and 2-bed Wembley flats, a Worcester Bosch Greenstar 2000 25kW. For 3-bed houses, Worcester 4000 or Vaillant ecoTEC Plus. For 4-bed homes with two bathrooms, Worcester 8000 or Viessmann Vitodens. Never oversize — bigger isn't better, just more expensive to buy and run.
Do you offer 0% finance?+
No. Finance deals typically add 15-20% to the headline price for the brokerage margin (rolled into the boiler cost). If you need to spread the cost, your bank's standard personal-loan rate is almost always cheaper than the "interest-free" install package.
What warranty do I get?+
Manufacturer warranty: 7-12 years depending on the boiler. Worcester Greenstar 2000 = 7yr; Worcester 4000 and Vaillant ecoTEC Plus = 10yr; Worcester 8000 = 12yr; Viessmann Vitodens = 12yr. Plus my own 12-month workmanship guarantee on the install itself.
Can I keep my existing radiators?+
In 95% of cases, yes. The system flush before commissioning typically clears any sludge, and existing radiators integrate fine with a new combi. If specific radiators are too corroded to flush properly, I'll show you the test water and recommend swapping just the affected panels (£280-£400 each).