Boiler Installation — Westminster
Boiler Installation in Westminster
Gas Safe registered engineers installing new boilers across Westminster — Westminster, Paddington, Maida Vale, Marylebone. From £1,500 installed. Vaillant, Worcester Bosch, Baxi, Ideal and Viessmann. Free assessment included.
Choosing the right boiler in Westminster
Choosing the Right Boiler for Your Property
Combi boiler
The most popular choice for London flats and smaller terraces. Heats water on demand — no cylinder or loft tank needed. Ideal for 1-3 bedroom properties. Loses efficiency with very high simultaneous hot water demand (e.g. two showers running).
System boiler + cylinder
Best for larger London homes with 2+ bathrooms. Stores hot water in a cylinder for simultaneous demand. Requires a cylinder cupboard. Works well with solar thermal top-up and heat pumps.
Boiler efficiency
All new boilers installed since 2005 must be A-rated (90%+ efficient). Replacing a G-rated boiler from the 1980s or 1990s with a modern A-rated unit typically reduces gas consumption by 30-40% — paying back the installation cost over 5-8 years.
Warranty: Worcester Bosch offers up to 12 years warranty; Vaillant up to 10 years; Baxi up to 10 years — all require annual servicing by a Gas Safe registered engineer to remain valid. We register your warranty on the day of installation.
Areas in Westminster we cover
What we do in Westminster
Boiler installation checklist
180+ verified reviews
Trusted by London homeowners
60 reviews
Checkatrade.com
120 reviews
MyBuilder.com
Common questions
Boiler Installation Westminster: frequently asked
How much does boiler installation cost in Westminster?
Boiler installation in Westminster starts from £1,500 for a standard combi-for-combi swap in the same location. A new combi with a new flue position costs £2,000-£3,500. A system boiler with cylinder starts from £2,500. The full price is confirmed after a free assessment — we cover Westminster, Paddington, Maida Vale, Marylebone.
How long does boiler installation take in Westminster?
A standard combi-for-combi swap in Westminster takes one day. Installations requiring a new flue position or a system boiler with cylinder typically take 1-2 days. A full heating system installation (boiler, radiators, pipework) takes 2-4 days.
Which boiler brand should I choose for my Westminster property?
Vaillant and Worcester Bosch are the most reliable long-term choices for Westminster properties and offer the longest warranties. Baxi and Ideal offer better value for budget-conscious projects. We recommend based on your property size, water pressure and budget — and only fit brands we trust to service long-term.
Do I need a new boiler or can mine be repaired in Westminster?
We give honest advice at every call-out in Westminster. Boilers under 10 years old are usually worth repairing. Boilers over 15 years old, or those with multiple recurring faults, are typically more cost-effective to replace — the energy savings from a modern A-rated unit often cover the installation cost within 5-8 years.