From £87,288
BRICK CONSTRUCTION is a trusted extension builder serving customers in GU20 and the surrounding area. Contact us to today to get a competitive quot...
From £86,936
BESPOKE BUILDING SOLUTIONS is an established and experienced local extension builder in GU20. Please contact us for a free, no obligation quote and...
From £87,032
I have been remodelling and restyling homes for over 35 years ; creating amazing spaces to live and making people happy is my passion , my hobby an...
From £87,472
Kendall Construction is an established and experienced local extension builder in GU20. Please contact us for a free, no obligation quote and compe...
From £87,432
JAMES BURKE GENERAL BUILDING is an established and experienced local extension builder in GU20. Please contact us for a free, no obligation quote a...
From £87,288
Trusted and professional extension builder in GU20. Experienced in all extension buildering work and keeping within budget and on quote. Crown Desi...
From £87,400
HSL BUILDING SERVICES are here to help customers who need an Extension Builder in GU20. We offer a competitive rate to complete all your extension...
From £86,992
Stoke Park Developments Ltd is a trusted extension builder serving customers in GU20 and the surrounding area. Contact us to today to get a competi...
From £86,968
JORDAN CONSTRUCTION LTD are here to help customers who need an Extension Builder in GU20. We offer a competitive rate to complete all your extensio...
From £87,232
Our highly professional business is named after the incredible grandfather of our company’s founder, Zane. Ron Smale guided Zane into the constru...

Building a granny annexe ranges from £86,936 (BESPOKE BUILDING SOLUTIONS based in GU20) to £87,472 (Kendall Construction based in GU19), 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 GU20 by posting a job with HaMuch. We will send it to extension builders in GU20 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Ascot | £41 | £276 |
| Granny Annexe near Camberley | £41 | £283 |
| Granny Annexe near Bracknell | £41 | £286 |
| Granny Annexe near Bracknell Forest | £41 | £287 |
| Granny Annexe near Sandhurst | £41 | £283 |
| Granny Annexe near Woking | £43 | £277 |
| Granny Annexe near Egham | £42 | £266 |
| Granny Annexe near Farnborough | £41 | £273 |
| Granny Annexe near New Haw | £43 | £273 |
| Granny Annexe near Staines-upon-Thames | £42 | £269 |
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 - £17,704

Two storey extension - £88,306

Build a timber frame extension - £26,204

Build a swimming pool - £81,204

Single storey extension - £59,080

Side return extension - £43,795

Install an RSJ - £2,404

Outbuilding - £10,204

Build a Mansard loft conversion - £52,204

Loft conversion - £35,663

Build a kitchen extension - £42,204

Hip to gable loft conversion - £42,204

Granny annexe - £87,204

Garden office - £10,204

Convert a Garage - £16,204

Garage - £18,704

Build a flat roof extension - £22,204

Build a dormer loft conversion - £42,204

Concrete foundations - £6,454

Convert a bungalow loft - £29,204

Convert a basement - £39,795