From £87,048
At Unico Developers LTD, we offer quality services from small projects up to new builds for all clients at reasonable prices. Our courteous Constru...
From £87,400
Trusted and professional extension builder in SG13. Experienced in all extension buildering work and keeping within budget and on quote. Aspect Con...
From £87,056
Experienced extension builder ready to quote for your work. Oakridge Construction Limited is the best extension builder in SG13. No obligation free...
From £87,192
Herts Loft Ltd is an established extension buildering business in SG13. We come highly recommended and provide competitive quotes for your work.
From £87,000
Need to find an Extension Builder near you for all your extension buildering work?
J B R Contracts provides a local, trusted extension buil...
From £87,376
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,184
Trusted and professional extension builder in SG13. Experienced in all extension buildering work and keeping within budget and on quote. Chelsfield...
From £87,272
Landmark General Builders Ltd are here to help customers who need an Extension Builder in SG13. We offer a competitive rate to complete all your ex...
From £87,232
Absolute Building & Carpentry is an established and experienced local extension builder in SG13. Please contact us for a free, no obligation quote ...
From £87,384
D E BRACKEN BUILDING SERVICES is an established and experienced local extension builder in SG13. Please contact us for a free, no obligation quote ...

Building a granny annexe ranges from £87,000 (J B R Contracts based in SG14) to £87,400 (Aspect Construct and Carpentry Ltd based in SG13), 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 SG13 by posting a job with HaMuch. We will send it to extension builders in SG13 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Hertford | £46 | £289 |
| Granny Annexe near Ware | £47 | £296 |
| Granny Annexe near Hoddesdon | £46 | £296 |
| Granny Annexe near Welwyn Garden City | £42 | £268 |
| Granny Annexe near Cheshunt | £48 | £286 |
| Granny Annexe near Hatfield | £64 | £283 |
| Granny Annexe near East Hertfordshire | £44 | £289 |
| Granny Annexe near Potters Bar | £43 | £273 |
| Granny Annexe near Harlow | £43 | £288 |
| Granny Annexe near Epping Forest | £44 | £273 |
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 - £17,714

Two storey extension - £88,322

Build a timber frame extension - £26,214

Build a swimming pool - £81,214

Single storey extension - £59,288

Side return extension - £43,912

Install an RSJ - £2,414

Outbuilding - £10,214

Build a Mansard loft conversion - £52,214

Loft conversion - £35,760

Build a kitchen extension - £42,214

Hip to gable loft conversion - £42,214

Granny annexe - £87,214

Garden office - £10,214

Convert a Garage - £16,214

Garage - £18,714

Build a flat roof extension - £22,214

Build a dormer loft conversion - £42,214

Concrete foundations - £6,464

Convert a bungalow loft - £29,214

Convert a basement - £39,912