Builders Westminster

A curved white stucco Regency terrace overlooking a park in warm morning light.

They have been extremely efficient and reassuring. It was a complex project but they took it all in their stride. They recommended very good contractors who were all punctual, polite and capable.

Andrew

London

Having the Beams team on hand to manage the project and provide extra reassurance on build decisions was incredibly helpful and made the whole experience stress free.

Kerry

London

All about trust. I felt comfortable with my money, my project, and my home knowing that the outcome would be to my satisfaction or would be made good.

Chris

London

Vetted builders in Westminster, not one-size-fits-all

Westminster covers everything from stucco-fronted townhouses in Belgravia and Pimlico to mansion blocks in Marylebone and Maida Vale, so a builder who works well on one street may not be the right fit two streets over. Beams matches you with vetted specialists suited to your specific property and project, gives you up to three like-for-like quotes to compare, and puts proper protections in place before a single day of work begins.

Every builder in the network is personally vetted. We meet them in person, check references and inspect recent work, so only reliable, high-quality tradespeople reach you. You choose who you want to work with, with the full picture in front of you.

What our Westminster builders can do

From a single room to a whole house, our builders take on the full range of home renovation work across Westminster:

Kitchen and bathroom renovations: From refits to side-return kitchen extensions.

Loft conversions: Dormer, hip-to-gable and Velux, where roofline and planning allow.

House extensions: Rear and side-return to wraparound projects.

Basement and cellar conversions: With proper waterproofing.

Full home renovations and refurbishments: First fix to final snag, under one contract.

What a builder costs in Westminster

Westminster is one of London's most expensive property markets, so specification, access and party wall considerations often push project costs toward the upper end of London ranges. There is no flat rate: cost depends on the size of your property, the scope of work, finish level, and whether the building sits within one of Westminster's conservation areas. The figures below are estimate ranges based on Beams' experience of London building projects, not fixed quotes; your builder confirms a fixed price once the scope is agreed.

Project scope	Estimated cost range
Kitchen or bathroom refurbishment	£25,000 - £60,000
Single-storey extension or loft conversion	£60,000 - £150,000
Larger extension or higher-spec refurbishment	£150,000 - £350,000
Full house renovation or basement addition	£350,000+

How it works

1. Get your free estimate: Tell us about your project and budget; your planner gives you a range before any commitment.

2. Meet trusted builders: Book up to three free visits and compare like-for-like quotes.

3. Renovate with confidence: Choose your builder and Beams sets up the contract and milestone payments.

Why homeowners choose Beams over finding a builder cold

Hiring off a directory or a word-of-mouth tip is a gamble on price, quality and reliability. With Beams the hard parts are handled. You compare like-for-like quotes from vetted builders, your price is fixed in writing, your money is protected by milestone payments, and your workmanship is covered for 12 months. It is the difference between hoping a build goes well and knowing the safeguards are already in place.

Protections on every Westminster project

Every project comes with our full Protections:

Personally vetted builders: Met in person, references and recent work checked.

Fixed-price contracts: Agreed in writing before work begins.

Milestone payments: Held securely, released only when you approve each stage.

12-month workmanship warranty: Plus up to £10,000 cover if a builder leaves the network.

Licensed and insured: Minimum £6m public liability insurance.

Renovation projects across Westminster

We work with vetted builders right across Westminster, from the stucco-fronted townhouses of Belgravia and Pimlico to the mansion blocks of Marylebone and Maida Vale, and the mixed Georgian and Victorian terraces around Fitzrovia. Our builders know the area's period housing stock, the local planning rules and the practicalities of working on tighter central London streets, including access restrictions and parking suspensions.

Renovating a home in Westminster

The average house price in Westminster was £877,000 as of July 2026 (ONS/HM Land Registry, provisional), among the highest of any London borough. Much of Westminster sits within one of the borough's 56 conservation areas, and some streets carry additional Article 4 Directions removing certain permitted development rights, so a loft conversion or rear extension often needs full planning permission from Westminster City Council rather than falling under permitted development. A builder who understands the council's planning process and conservation requirements will save you time and avoid false starts. Our vetted builders work across Westminster and into neighbouring west London areas including Hammersmith and Fulham, taking on everything from a single room to a full refurbishment.

The same design team, vetted builders and fixed-price process sit behind every project. See how our vetted builder network works, from the first design call to final sign-off.