Extension Builders Near You

Need more space without moving? Find builders for single and double-storey extensions, and ask about planning and building regulations when you compare quotes.

What extension builders can help with

On Arkadia Connect, extension builders take on jobs such as these. If your job is not on the list, describe it in your own words and pick the closest trade.

• Single-storey extensions
• Double-storey extensions
• Kitchen extensions
• Side-return extensions
• Garden rooms

Extension builders add rooms, convert garages and open up ground floors. These are bigger projects, so your job post is the start of a conversation about design, approvals and stages.

What to include in your extension builder job post

The clearer your description, the easier it is for a tradesperson to quote accurately. A good job post includes:

• Your postcode, so the right local traders are alerted
• What needs doing, and roughly how big the job is
• Photos or a short video of the work area, plus parking and access details
• Any deadline, and whether the job is urgent
• Describe what you want to add, share any drawings, and say whether planning permission is already in place.

How to choose an extension builder

Each profile shows badges for the checks our team has made, such as ID checked or Insurance uploaded. A badge tells you what we looked at, not that we recommend the trader, so read the profile and ask questions. Reviews on Arkadia come from jobs booked through Arkadia, so every review is real.

Worth checking before you hire:

• Whether planning permission or permitted development applies to your plans
• Building regulations approval, and who arranges it
• Structural engineer drawings or calculations where the design needs them
• A written contract with stage payments and public liability insurance details

Ask who arranges building regulations approval, and how stage payments will work.

How Arkadia works

• Posting your job is free.
• Only up to 3 local extension builders can take up each job, so you hear from a few people who want the work rather than a crowd.
• If your job is urgent, tick the urgent box. Traders who are Available now see it first.
• You compare the replies and choose who to hire, or choose nobody. If nobody replies within 24 hours, we step in.

Post your extensions job free – up to 3 local extension builders can respond

Describe the work, give your postcode and add photos. Local extension builders who cover your area get an alert, and you choose who to hire. Posting is free.

Post your job free

Find extension builders in your town

These pages explain how Arkadia works in the towns and cities we cover.

• Find a tradesperson in Manchester
• Find a tradesperson in London
• Find a tradesperson in Birmingham
• Find a tradesperson in Leeds
• Find a tradesperson in Liverpool
• Find a tradesperson in Bristol
• Find a tradesperson in Bolton
• Find a tradesperson in Edgbaston
• Find a tradesperson in Sutton Coldfield
• Find a tradesperson in Sale

Frequently asked questions

How much does an extension builder cost?

Prices depend on the size of the job, the materials and how easy the work is to reach, so the most reliable way to know is to compare written quotes. Post your job for free and local extension builders can quote for the work you need.

Should I get more than one quote?

Yes. Comparing two or three written quotes for the same work, materials and timescale helps you spot anything missing or unusually priced.

How can I check an extension builder is insured?

Ask to see their public liability insurance certificate before any work starts, and check it covers the type of work you need. Look for the Insurance uploaded badge on a profile, but we do not assess the cover, so confirm the insurance yourself.

How many extension builders will contact me?

Only up to 3 traders can take up each job, so you hear from a few extension builders who want the work rather than a crowd. If nobody replies within 24 hours, we step in.

What should a written quote include?

A clear description of the work, the materials and who supplies them, the price or payment stages, the start date and estimated timescale, and what happens if the job changes.