Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Trusted and professional extension builder in Stevenage. Experienced in all extension buildering work and keeping within budget and on quote. Amcel...
Need an Extension Builder in Stevenage? MA Gower has been helping local clients (20 mile radius) with their extension buildering jobs for many year...
Need an Extension Builder in Stevenage? WILLMOTT DIXON CONSTRUCTION LI has been helping local clients (20 mile radius) with their extension builder...
Experienced extension builder ready to quote for your work. HB Construction is the best extension builder in Stevenage. No obligation free quotes a...
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
Stevenage, SG1
Experienced extension builder ready to quote for your work. G B BUILDSTORE LTD is the best extension builder in Stevenage. No obligation free quote...
Need to find an Extension Builder near you for all your extension buildering work?
TPJ Building Ltd provides a local, trusted extension bui...
Need an Extension Builder in Stevenage? M SPINDLER CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering...
Claudio Lutchi
Complex Construction is an established extension buildering business in Stevenage. We come highly recommended and provide competitive quotes for yo...

Building a granny annexe ranges from £86,320 (Complex Construction based in AL7) to £87,488 (M SPINDLER CONSTRUCTION LTD based in SG6), 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 Stevenage by posting a job with HaMuch. We will send it to extension builders in Stevenage who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Stevenage | £44 | £282 |
| Granny Annexe near Hitchin | £43 | £283 |
| Granny Annexe near North Hertfordshire | £44 | £283 |
| Granny Annexe near Letchworth | £44 | £283 |
| Granny Annexe near East Hertfordshire | £44 | £289 |
| Granny Annexe near Welwyn Garden City | £42 | £268 |
| Granny Annexe near Hertford | £46 | £289 |
| Granny Annexe near Harpenden | £86 | £316 |
| Granny Annexe near Luton | £41 | £278 |
| Granny Annexe near Ware | £47 | £296 |
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 - £17,583

Two storey extension - £88,125

Build a timber frame extension - £26,083

Build a swimming pool - £81,083

Single storey extension - £56,664

Side return extension - £42,436

Install an RSJ - £2,283

Outbuilding - £10,083

Build a Mansard loft conversion - £52,083

Loft conversion - £34,530

Build a kitchen extension - £42,083

Hip to gable loft conversion - £42,083

Granny annexe - £87,083

Garden office - £10,083

Convert a Garage - £16,083

Garage - £18,583

Build a flat roof extension - £22,083

Build a dormer loft conversion - £42,083

Concrete foundations - £6,333

Convert a bungalow loft - £29,083

Convert a basement - £38,436