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Need to find an Extension Builder near you for all your extension buildering work?
OAK HOUSE BESPOKE BUILDERS provides a local, trusted ext...
Jatinder Kahlon
Hi, I’m Jatinder. I’m a qualified electrician and gas safe registered professional with 10 years of experience in the trade. We specialise in l...
From 2007 – 2015 David Rudelhoff (Founder and Director) was the Property Manager for a high profile, high net worth family. During that time, in ...
Russell Worcester
Byfleet, KT14
R & R Roofing Guildford are here to help customers who need an Extension Builder in Byfleet. We offer a competitive rate to complete all your exten...
Need to find an Extension Builder near you for all your extension buildering work?
Chim Me Sweep Chim Me Build provides a local, trusted ex...
Relax... you have found a reliable extension builder in Byfleet. DILCONSI CONSTRUCTION is a friendly and reliable company based in Byfleet who cons...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Cosmin-Adrian Aporcariti
We are a company based in South London, with a strong will to work and to do the best job possible every tine we start a job (big or small) because...
Need to find an Extension Builder near you for all your extension buildering work?
GS Wood Building Services provides a local, trusted exte...
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Building a granny annexe ranges from £86,760 (We Fix & Upkeep Ltd based in KT16) to £87,800 (OAK HOUSE BESPOKE BUILDERS based in KT9), 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 Byfleet by posting a job with HaMuch. We will send it to extension builders in Byfleet who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near New Haw | £43 | £273 |
| Granny Annexe near Woking | £43 | £277 |
| Granny Annexe near Elmbridge | £44 | £278 |
| Granny Annexe near Walton-on-Thames | £43 | £277 |
| Granny Annexe near Esher | £43 | £274 |
| Granny Annexe near Sunbury-on-Thames | £43 | £273 |
| Granny Annexe near Great Bookham | £42 | £281 |
| Granny Annexe near Staines-upon-Thames | £42 | £269 |
| Granny Annexe near Egham | £42 | £266 |
| Granny Annexe near West Molesey | £43 | £274 |
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 - £17,678

Two storey extension - £88,268

Build a timber frame extension - £26,178

Build a swimming pool - £81,178

Single storey extension - £58,568

Side return extension - £43,507

Install an RSJ - £2,378

Outbuilding - £10,178

Build a Mansard loft conversion - £52,178

Loft conversion - £35,423

Build a kitchen extension - £42,178

Hip to gable loft conversion - £42,178

Granny annexe - £87,178

Garden office - £10,178

Convert a Garage - £16,178

Garage - £18,678

Build a flat roof extension - £22,178

Build a dormer loft conversion - £42,178

Concrete foundations - £6,428

Convert a bungalow loft - £29,178

Convert a basement - £39,507