From £44,025
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.
From £35,100
We are a small family run business with over 20 years experience in brickwork, bathroom/kitchen fitting, roofing, landscaping, fencing, tiling and ...
From £31,425
Park Building Services Ltd is a trusted extension builder serving customers in Southampton and the surrounding area. Contact us to today to get a c...
From £31,575
TP Developments are here to help customers who need an Extension Builder in Southampton. We offer a competitive rate to complete all your extension...
From £35,850
Elmer Building Services ltd is an established extension buildering business in Southampton. We come highly recommended and provide competitive quot...
From £35,100
Southampton, SO15
Bailey Construction Services are here to help customers who need an Extension Builder in Southampton. We offer a competitive rate to complete all y...
From £31,425
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £34,875
Need to find an Extension Builder near you for all your extension buildering work?
Mobile Services provides a local, trusted extension buil...
From £35,550
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...
From £35,025
Southampton, SO19
Claytons Building and Roofing are here to help customers who need an Extension Builder in Southampton. We offer a competitive rate to complete all ...

Comparing extension builders estimates for Loft conversion gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost of a loft conversion in Southampton by posting your job to extension builders in Southampton.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Loft Conversion near Southampton | £34 | £243 |
| Loft Conversion near Eastleigh | £34 | £244 |
| Loft Conversion near Totton | £34 | £243 |
| Loft Conversion near Hedge End | £34 | £244 |
| Loft Conversion near Chandler's Ford | £34 | £245 |
| Loft Conversion near Locks Heath | £33 | £240 |
| Loft Conversion near Romsey | £32 | £230 |
| Loft Conversion near New Forest | £32 | £245 |
| Loft Conversion near Fareham | £35 | £250 |
| Loft Conversion near Lee-on-the-Solent | £35 | £249 |
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 - £17,633

Two storey extension - £88,199

Build a timber frame extension - £26,133

Build a swimming pool - £81,133

Single storey extension - £57,656

Side return extension - £42,994

Install an RSJ - £2,333

Outbuilding - £10,133

Build a Mansard loft conversion - £52,133

Loft conversion - £34,995

Build a kitchen extension - £42,133

Hip to gable loft conversion - £42,133

Granny annexe - £87,133

Garden office - £10,133

Convert a Garage - £16,133

Garage - £18,633

Build a flat roof extension - £22,133

Build a dormer loft conversion - £42,133

Concrete foundations - £6,383

Convert a bungalow loft - £29,133

Convert a basement - £38,994