Trusted Builders in London
General builders and construction firms in London
Find professional builders in London recommended by London Plastering Service. From extensions to full refurbishments.
Finding a reliable builder in London can be challenging. With hundreds of builders advertising across the capital, how do you separate the professionals from the cowboys? At London Plastering Service, we've spent over 20 years working alongside tradespeople across every London borough. We've seen first-hand who turns up on time, who does quality work, and who stands behind their guarantees — and who doesn't.
This page exists because we're frequently asked for recommendations. Our clients often need other trades before or after plastering work — an builder to rewire before we skim, or a plumber to connect a new bathroom we've plastered. Rather than send people to a generic directory, we've curated a list of builders we'd genuinely recommend to friends and family.
Every builder listed below has been assessed on workmanship, professionalism, communication, pricing transparency and customer service. We don't charge for inclusion. We don't accept paid listings. A business appears here because we believe they do good work — and we're willing to stake our reputation on that recommendation.
London is a demanding market. Property values are high, expectations are exacting, and access can be difficult. The builders we recommend understand these realities. They carry proper insurance, hold relevant qualifications (FMB membership, CSCS cards, Public liability insurance, Building Regulations approval), and have a track record of satisfied customers across multiple boroughs.
Whether you're renovating a Victorian terrace in Croydon, updating a flat in Lambeth, or extending a family home in Bromley, the builders on this page cover your area. Use the filters to narrow down by location, check ratings, and reach out directly to the businesses that match your needs.
Recommended Builders in London
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Why Choosing the Right Builder Matters
Choosing the right builder matters more than most people realise. A poor builder can cause damage that costs far more to fix than the original job — from delays and budget overruns to serious safety issues that may not become apparent for months.
In London, where property values are among the highest in the country, substandard work can significantly impact your home's value. Insurance claims for botched builders work run into millions of pounds each year across the UK. The right builder doesn't just complete the job — they provide peace of mind, proper documentation, and a guarantee that protects your investment.
Professional builders also understand the regulatory landscape. They know when building regulations apply, what certifications are needed (FMB membership and CSCS cards), and how to ensure their work is compliant. This protects you when you come to sell your property.
Questions to Ask Before Hiring a Builder
Are you FMB membership, and can you provide proof?
Are you CSCS cards?
Are you Public liability insurance?
Are you Building Regulations approval?
Can you provide references from recent London jobs?
Do you offer a written guarantee on your work?
How do you charge — fixed price, day rate, or hourly?
Are you insured, and what is your public liability cover?
Signs of a Good Builder
They hold proper qualifications — FMB membership, CSCS cards, Public liability insurance, Building Regulations approval.
They provide a written, itemised quote before starting work.
They carry public liability insurance of at least £2 million.
They have genuine reviews mentioning punctuality, tidiness and communication.
They turn up when they say they will and communicate clearly if plans change.
They don't pressure you to make a decision on the spot.
They're happy to show you examples of previous work in similar London properties.
They provide proper documentation — certificates, warranties and receipts.
Typical Builders Pricing in London
Pricing for builders in London varies based on the scope of work, location, and the experience of the builder. Below are typical price ranges based on current London rates:
| Service | Typical Price |
|---|---|
| Single-storey extension | £25,000–£50,000 |
| Two-storey extension | £45,000–£80,000 |
| Garage conversion | £8,000–£15,000 |
| Basement conversion | £50,000–£120,000 |
| Full house refurb | £30,000–£100,000+ |
Prices are indicative for London and may vary based on location, scope, and materials. Always obtain a written quote.
How We Selected These Builders
We select businesses for this directory based on a combination of factors. First and foremost, we consider direct experience — have we or our clients worked with this builder and been satisfied? We also assess qualifications (FMB membership, CSCS cards, Public liability insurance, Building Regulations approval), insurance coverage, online reviews, and the quality of their communication.
We look at how long a business has been operating, whether they have a physical presence in London, and whether they handle complaints professionally. We prioritise businesses that are transparent about pricing, responsive to enquiries, and consistent in their workmanship.
Importantly, we remove businesses that receive repeated complaints or whose standards slip. This directory is a living resource, not a paid listing — inclusion is earned and maintained through quality.
Why Our Recommendations Matter
Word-of-mouth recommendations remain the most powerful way to find a trustworthy tradesperson. Online directories are full of businesses that pay for visibility, not necessarily for quality. When a recommendation comes from a professional who works alongside builders every day, it carries far more weight.
By publishing our recommendations publicly, we create a resource that benefits London homeowners while encouraging higher standards across the trades. Businesses featured here know their reputation is on the line — and so is ours.
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