Need an Extension Builder in SG18? R&J Building Services Ltd has been helping local clients (20 mile radius) with their extension buildering jobs f...
TCL BUILDING SOLUTIONS LTD are here to help customers who need an Extension Builder in SG18. We offer a competitive rate to complete all your exten...
From £42,168
Relax... you have found a reliable extension builder in SG18. Imogen Jack is a friendly and reliable company based in SG18 who consider no job as t...
From £42,136
Trusted and professional extension builder in SG18. Experienced in all extension buildering work and keeping within budget and on quote. J. WATSON ...

In SG18, prices for dormer loft conversions range from £41,848 (R&J Building Services Ltd based in SG17) to £42,192 (TCL BUILDING SOLUTIONS LTD based in SG18), 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 SG18. 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 Biggleswade | £41 | £268 |
| Build A Dormer Loft Conversion near Letchworth | £44 | £283 |
| Build A Dormer Loft Conversion near North Hertfordshire | £44 | £283 |
| Build A Dormer Loft Conversion near Kempston | £44 | £273 |
| Build A Dormer Loft Conversion near Bedford | £45 | £278 |
| Build A Dormer Loft Conversion near South Bedfordshire | £45 | £278 |
| Build A Dormer Loft Conversion near Mid Bedfordshire | £42 | £276 |
| Build A Dormer Loft Conversion near Ampthill | £38 | £258 |
| Build A Dormer Loft Conversion near St Neots | £51 | £318 |
| Build A Dormer Loft Conversion near Hitchin | £43 | £283 |
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 - £17,586

Two storey extension - £88,129

Build a timber frame extension - £26,086

Build a swimming pool - £81,086

Single storey extension - £56,720

Side return extension - £42,468

Install an RSJ - £2,286

Outbuilding - £10,086

Build a Mansard loft conversion - £52,086

Loft conversion - £34,556

Build a kitchen extension - £42,086

Hip to gable loft conversion - £42,086

Granny annexe - £87,086

Garden office - £10,086

Convert a Garage - £16,086

Garage - £18,586

Build a flat roof extension - £22,086

Build a dormer loft conversion - £42,086

Concrete foundations - £6,336

Convert a bungalow loft - £29,086

Convert a basement - £38,468