Need a builder or construction company?Post your project free · private details stay protected · you choose which introductions to approve.
House Extension Contractors in London

Find house extension contractors for your project in London.

BuildConnect UK helps clients with construction work in London publish a clear project opportunity and receive interest from relevant construction companies. The platform is designed around controlled introductions: your private contact information stays protected until you approve a connection.

Free for clientsExact address stays privateYou approve introductions
Ready to find contractors?

Post your London project free.

Describe the work once, keep personal contact details private and review contractor interest before deciding who you want to connect with.

Why clients use BuildConnect

One project brief. Relevant contractor interest. You stay in control.

1. Post once

Describe the work, approximate area, budget and timing once instead of repeating the same enquiry to multiple companies.

2. Review the companies

Compare recorded company information, project fit and contractor interest before deciding who you want to speak with.

3. Approve the introduction

Your exact address and direct contact details remain protected until you choose to approve an introduction.

Typical project types

Projects involving house extension contractors

  • Single-storey rear extensions
  • Side-return extensions
  • Double-storey extensions
  • Kitchen and living-space extensions
  • Structural openings and steelwork
  • Extension and refurbishment packages
Due diligence

What to compare before appointing

  • Relevant experience on comparable projects.
  • Company identity, trading history and references.
  • Current insurance appropriate to the work.
  • Scope clarity, exclusions, programme and quotation detail.
  • A suitable written construction contract before work starts.
Local coverage

London and surrounding areas

Projects can vary significantly by property type, access, planning constraints and programme. Contractors decide individually whether an opportunity falls within their working area and capability.

North LondonWest LondonNorth-West LondonSouth LondonSouth-West LondonEast LondonGreater London
Prepare before you appoint

Useful free tools for your London project.

Create a clearer project brief

Organise scope, drawings, approvals, access, budget, programme and contractor requirements before asking companies to price the work.

Project brief generator →

Compare builder quotations

Place quotation totals, VAT treatment, exclusions, provisional sums and programme information onto a clearer like-for-like basis.

Builder quote comparison →

Check contractor evidence

Review company identity, relevant experience, insurance, references, programme and commercial clarity before appointment.

Prequalification checklist →

Read the free guide: how to find and check a builder →

For construction companies

Work in London?

Builders specialising in London extensions can join the network and identify extension work as their primary capability to improve matching.

Joining and browsing are free. Any project-specific success commission is shown and accepted before private client details are released.

Join the contractor network
Questions

Frequently asked questions

How does BuildConnect UK help me find house extension contractors in London?

You post your project details free, construction companies can review the opportunity, and you decide which introduction requests to approve. Your private contact details are not published with the project.

Does BuildConnect UK appoint the contractor for me?

No. BuildConnect UK provides a controlled introduction process and company information. You remain responsible for comparing quotations, checking experience, insurance, references and contract terms before appointment.

What information should I include in my London project?

Include the scope, approximate location, expected budget, programme, access constraints and any drawings or specifications you can share. Better project information helps suitable contractors assess whether the opportunity matches their capability.

BuildConnect UK facilitates project introductions and provides recorded company information. It does not endorse, recommend or guarantee any contractor. Clients remain responsible for their own due diligence and appointment decisions.

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