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 £52,168
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 £52,136
Trusted and professional extension builder in SG18. Experienced in all extension buildering work and keeping within budget and on quote. J. WATSON ...

Mansard loft conversions range from the cheapest installation of £51,848 (R&J Building Services Ltd based in SG17) to the dearest of around £52,192 (TCL BUILDING SOLUTIONS LTD based in SG18).
While these estimates give you a good idea how much you'll pay for a mansard loft conversion, the only way to get an accurate price is to get real quotes from real builders.
Get quotes to install a mansard loft conversion in SG18 by posting a job with HaMuch and we'll send it to extension builders in SG18.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Mansard Loft Conversion near Biggleswade | £41 | £268 |
| Build A Mansard Loft Conversion near Letchworth | £44 | £283 |
| Build A Mansard Loft Conversion near North Hertfordshire | £44 | £283 |
| Build A Mansard Loft Conversion near Kempston | £44 | £273 |
| Build A Mansard Loft Conversion near Bedford | £45 | £278 |
| Build A Mansard Loft Conversion near South Bedfordshire | £45 | £278 |
| Build A Mansard Loft Conversion near Mid Bedfordshire | £42 | £276 |
| Build A Mansard Loft Conversion near Ampthill | £38 | £258 |
| Build A Mansard Loft Conversion near St Neots | £51 | £318 |
| Build A Mansard 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