From £86,968
JORDAN CONSTRUCTION LTD are here to help customers who need an Extension Builder in SL5. 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 SL5 and the surrounding area. Contact us to today to get a competit...
From £87,288
Trusted and professional extension builder in SL5. Experienced in all extension buildering work and keeping within budget and on quote. Crown Desig...
From £87,472
ASAP Roofing & Exterior Maintenance is a trusted extension builder serving customers in SL5 and the surrounding area. Contact us to today to get a ...
From £87,136
Experienced extension builder ready to quote for your work. A L King Services is the best extension builder in SL5. No obligation free quotes and m...
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 £87,096
Construction Project Management company with over 30 years experience specialising in new builds, self builds and refurbishments throughout the Sou...
From £86,936
BESPOKE BUILDING SOLUTIONS is an established and experienced local extension builder in SL5. Please contact us for a free, no obligation quote and ...
From £86,936
We have been in the trade for some years now and offer a wide range of services from decorating through to complete refurbishment .
From £87,288
BRICK CONSTRUCTION is a trusted extension builder serving customers in SL5 and the surrounding area. Contact us to today to get a competitive quote...

Building a granny annexe ranges from £86,936 (BESPOKE BUILDING SOLUTIONS based in GU20) to £87,472 (ASAP Roofing & Exterior Maintenance based in SL5), 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 SL5 by posting a job with HaMuch. We will send it to extension builders in SL5 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Ascot | £41 | £276 |
| Granny Annexe near Bracknell | £41 | £286 |
| Granny Annexe near Bracknell Forest | £41 | £287 |
| Granny Annexe near Egham | £42 | £266 |
| Granny Annexe near Windsor | £41 | £271 |
| Granny Annexe near Windsor & Maidenhead | £42 | £272 |
| Granny Annexe near Camberley | £41 | £283 |
| Granny Annexe near Staines-upon-Thames | £42 | £269 |
| Granny Annexe near Sandhurst | £41 | £283 |
| Granny Annexe near Wokingham | £41 | £280 |
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 - £17,614

Two storey extension - £88,172

Build a timber frame extension - £26,114

Build a swimming pool - £81,114

Single storey extension - £57,288

Side return extension - £42,787

Install an RSJ - £2,314

Outbuilding - £10,114

Build a Mansard loft conversion - £52,114

Loft conversion - £34,823

Build a kitchen extension - £42,114

Hip to gable loft conversion - £42,114

Granny annexe - £87,114

Garden office - £10,114

Convert a Garage - £16,114

Garage - £18,614

Build a flat roof extension - £22,114

Build a dormer loft conversion - £42,114

Concrete foundations - £6,364

Convert a bungalow loft - £29,114

Convert a basement - £38,787