Trusted and professional extension builder in SG4. Experienced in all extension buildering work and keeping within budget and on quote. Amcell Reno...
Experienced extension builder ready to quote for your work. HB Construction is the best extension builder in SG4. No obligation free quotes and man...
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
Gary Braine
Experienced extension builder ready to quote for your work. G B BUILDSTORE LTD is the best extension builder in SG4. No obligation free quotes and ...
From £87,272
Harris Building Solutions Limited is an established extension buildering business in SG4. We come highly recommended and provide competitive quotes...
From £87,232
We are a local roofing company offering a complete roofing service.We provide one of the most cost effective, reliable roofing services in and ...
From £87,408
M P BUILDING LIMITED is an established and experienced local extension builder in SG4. Please contact us for a free, no obligation quote and compet...
From £86,704
Need an Extension Builder in SG4? L P L Property Services Limited has been helping local clients (20 mile radius) with their extension buildering j...
From £87,320
Totalworth Building Services is an established extension buildering business in SG4. We come highly recommended and provide competitive quotes for ...
From £87,160
Andy N
Experienced extension builder ready to quote for your work. Precision Roofing & Building Maintenance is the best extension builder in SG4. No oblig...

Building a granny annexe ranges from £86,704 (L P L Property Services Limited based in SG5) to £87,408 (M P BUILDING LIMITED based in SG4), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in SG4 by posting a job with HaMuch. We will send it to extension builders in SG4 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Hitchin | £43 | £283 |
| Granny Annexe near Stevenage | £44 | £282 |
| Granny Annexe near North Hertfordshire | £44 | £283 |
| Granny Annexe near Letchworth | £44 | £283 |
| Granny Annexe near Luton | £42 | £279 |
| Granny Annexe near Harpenden | £45 | £282 |
| Granny Annexe near Welwyn Garden City | £42 | £269 |
| Granny Annexe near East Hertfordshire | £44 | £289 |
| Granny Annexe near Mid Bedfordshire | £42 | £276 |
| Granny Annexe near Hertford | £46 | £290 |
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 - £17,683

Two storey extension - £88,275

Build a timber frame extension - £26,183

Build a swimming pool - £81,183

Single storey extension - £58,664

Side return extension - £43,561

Install an RSJ - £2,383

Outbuilding - £10,183

Build a Mansard loft conversion - £52,183

Loft conversion - £35,468

Build a kitchen extension - £42,183

Hip to gable loft conversion - £42,183

Granny annexe - £87,183

Garden office - £10,183

Convert a Garage - £16,183

Garage - £18,683

Build a flat roof extension - £22,183

Build a dormer loft conversion - £42,183

Concrete foundations - £6,433

Convert a bungalow loft - £29,183

Convert a basement - £39,561