Luke Rees
General Building Services (Southampton) Ltd is a trusted extension builder serving customers in SP1 and the surrounding area. Contact us to today t...
Experienced extension builder ready to quote for your work. CSY Construction Ltd is the best extension builder in SP1. No obligation free quotes an...
Bailey Construction Services are here to help customers who need an Extension Builder in SP1. We offer a competitive rate to complete all your exte...
Experienced extension builder ready to quote for your work. Grant Construction is the best extension builder in SP1. No obligation free quotes and ...
Need an Extension Builder in SP1? T & S Construction has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
Trowel On is an established extension buildering business in SP1. We come highly recommended and provide competitive quotes for your work.
Relax... you have found a reliable extension builder in SP1. Bob Shearer Property Maintenance, Building & Roofing is a friendly and reliable compan...
The business offers a full design service for both kitchens and bathrooms.We work with you to make the best use of your space and find prod...
Benjamin Belsey
Arkson builders ltd is an established and experienced local extension builder in SP1. Please contact us for a free, no obligation quote and competi...
Kevin Sainsbury
K E Sainsbury Builders is an established and experienced local extension builder in SP1. Please contact us for a free, no obligation quote and comp...

In SP1, prices for dormer loft conversions range from £41,856 (Trowel On based in SO40) to £42,184 (Novare Plumbing Ltd based in SO51), but how much your conversion costs will vary depending on the size of your property, how easy access to your roof is and what you want to use the space for.
The best way to get an accurate price is to compare quotes from extension builders in SP1. Post your job on HaMuch now and we'll put you in touch with available extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Dormer Loft Conversion near Salisbury | £35 | £247 |
| Build A Dormer Loft Conversion near Test Valley | £37 | £261 |
| Build A Dormer Loft Conversion near Romsey | £32 | £230 |
| Build A Dormer Loft Conversion near New Forest | £32 | £245 |
| Build A Dormer Loft Conversion near Andover | £40 | £248 |
| Build A Dormer Loft Conversion near Totton | £34 | £243 |
| Build A Dormer Loft Conversion near Chandler's Ford | £34 | £245 |
| Build A Dormer Loft Conversion near Eastleigh | £34 | £244 |
| Build A Dormer Loft Conversion near Devizes | £32 | £242 |
| Build A Dormer Loft Conversion near Southampton | £34 | £243 |
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 - £17,540

Two storey extension - £88,060

Build a timber frame extension - £26,040

Build a swimming pool - £81,040

Single storey extension - £55,800

Side return extension - £41,950

Install an RSJ - £2,240

Outbuilding - £10,040

Build a Mansard loft conversion - £52,040

Loft conversion - £34,125

Build a kitchen extension - £42,040

Hip to gable loft conversion - £42,040

Granny annexe - £87,040

Garden office - £10,040

Convert a Garage - £16,040

Garage - £18,540

Build a flat roof extension - £22,040

Build a dormer loft conversion - £42,040

Concrete foundations - £6,290

Convert a bungalow loft - £29,040

Convert a basement - £37,950