Boiler Installation — SW20

Boiler Installation SW20

Gas Safe registered engineers installing new boilers across the SW20 postcode — Raynes Park & Wimbledon Chase, London. From £1,500 installed. Free assessment included — combi, system and heat-only configurations.

Book Boiler Installation SW20

Covering the SW20 areaFrom £1,500 installedGas Safe registered60 Checkatrade reviews120 MyBuilder reviews

Choosing the right boiler in SW20

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.

What we do in SW20

Boiler installation checklist

Free boiler assessment — sizing your new boiler for property and hot water demand

Boiler brand recommendations — Vaillant, Worcester Bosch, Baxi, Ideal, Viessmann

Old boiler removal and responsible disposal

New boiler installation — combi, system or heat-only configurations

Flue installation — concentric flue, extended flues, roof terminal if needed

Gas pipework modifications — upgrading or rerouting supply pipework

System flush before installation — clearing old sludge protects new boiler

Magnetic filter fitting — protecting new boiler from sludge and magnetite

Smart thermostat installation — Boiler Plus compliant, Nest/Hive/tado options

Commissioning and gas pressure testing — Gas Safe notification included

Manufacturer warranty registration — up to 12 years with annual service

Handover and controls demonstration — you know exactly how to operate it

180+ verified reviews

Trusted by London homeowners

60 reviews

Checkatrade.com

120 reviews

MyBuilder.com

Common questions

Boiler Installation SW20: frequently asked

How much does boiler installation cost in SW20?

Boiler installation in the SW20 postcode (Raynes Park & Wimbledon Chase) starts from £1,500 for a standard combi swap, £2,000-£3,500 for a new flue position, and from £2,500 for a system boiler with cylinder. Full price confirmed after a free assessment.

Do you install boilers in the SW20 area?

Yes — we cover the SW20 (Raynes Park & Wimbledon Chase) postcode for all boiler installations and replacements. Our Gas Safe engineers attend the same week and carry out a free assessment before quoting.

How long does boiler installation take in SW20?

A standard combi swap in SW20 takes one day. New flue positions or system boiler installations take 1-2 days. Full heating system installations take 2-4 days. We confirm the timeline at the free assessment.