Trusted and professional extension builder in SO53. Experienced in all extension buildering work and keeping within budget and on quote. Andy's Bui...
Luke Rees
General Building Services (Southampton) Ltd is a trusted extension builder serving customers in SO53 and the surrounding area. Contact us to today ...
ROB DINE CONSTRUCTION is an established and experienced local extension builder in SO53. Please contact us for a free, no obligation quote and comp...
Experienced extension builder ready to quote for your work. CSY Construction Ltd is the best extension builder in SO53. No obligation free quotes a...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Rob Butler
Need to find an Extension Builder near you for all your extension buildering work?
Oakstone Developments provides a local, trusted extensio...
Chris Bond
We are a Small Family run business with over 30 years experience in the building trade, Carpentry is my main trade, with NVQ Level 2.
Arshad Ali
We are a Design and Build company based in Hampshire. Proud of our roots, we try to be the very best in the way we go about our business. Friendly...
Steve Bannister
We are a small family run business with over 20 years experience in brickwork, bathroom/kitchen fitting, roofing, landscaping, fencing, tiling and ...
Park Building Services Ltd is a trusted extension builder serving customers in SO53 and the surrounding area. Contact us to today to get a competit...

A flat roof extension ranges from the cheapest of £21,752 (Steve Lovett Builders based in SO18) to the dearest of £23,096 (R&B Property Improvements based in PO9), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in SO53 by posting a job with HaMuch. We'll send it to extension builders in SO53.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Chandler's Ford | £34 | £245 |
| Build A Flat Roof Extension near Eastleigh | £34 | £244 |
| Build A Flat Roof Extension near Southampton | £34 | £243 |
| Build A Flat Roof Extension near Romsey | £32 | £230 |
| Build A Flat Roof Extension near Hedge End | £34 | £244 |
| Build A Flat Roof Extension near Winchester | £37 | £266 |
| Build A Flat Roof Extension near Totton | £34 | £243 |
| Build A Flat Roof Extension near Locks Heath | £33 | £240 |
| Build A Flat Roof Extension near Fareham | £35 | £250 |
| Build A Flat Roof Extension near Test Valley | £37 | £261 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,590

Two storey extension - £88,136

Build a timber frame extension - £26,090

Build a swimming pool - £81,090

Single storey extension - £56,808

Side return extension - £42,517

Install an RSJ - £2,290

Outbuilding - £10,090

Build a Mansard loft conversion - £52,090

Loft conversion - £34,598

Build a kitchen extension - £42,090

Hip to gable loft conversion - £42,090

Granny annexe - £87,090

Garden office - £10,090

Convert a Garage - £16,090

Garage - £18,590

Build a flat roof extension - £22,090

Build a dormer loft conversion - £42,090

Concrete foundations - £6,340

Convert a bungalow loft - £29,090

Convert a basement - £38,517