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Ferguson Building Services Limited is an established and experienced local extension builder in Mid Sussex. Please contact us for a free, no obliga...
David Oreilly
We are a family run business we 40 years experience delivering multiple projects from new developments . Extension. Loft conversion. Including foun...
Crawley Construction Ltd
Contact us: 07454160840 Email: enquiries@ We are a family run business since 15 year’s+. We are build on tru...
DC Construction is a trusted extension builder serving customers in Mid Sussex and the surrounding area. Contact us to today to get a competitive q...
J S Nisbet Loft Conversions are here to help customers who need an Extension Builder in Mid Sussex. We offer a competitive rate to complete all you...
Reuben Sargent
Rjscarpentryconstruction is a well established company with over 30 years of experience in the carpentry and construction industries
From £86,600
J Taylor
Taylor Building & Maintenance Services is an established extension buildering business in Mid Sussex. We come highly recommended and provide compet...
From £86,848
Need to find an Extension Builder near you for all your extension buildering work?
WATTSON BROS BUILDING LTD provides a local, trusted exte...
From £86,784
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...
From £87,064
JG Brickwork Services Limited is an established extension buildering business in Mid Sussex. We come highly recommended and provide competitive quo...

Building a granny annexe ranges from £86,600 (Taylor Building & Maintenance Services based in RH18) to £87,600 (RJ's Carpentry Construction based in RH15), 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 Mid Sussex by posting a job with HaMuch. We will send it to extension builders in Mid Sussex who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Mid Sussex | £35 | £261 |
| Granny Annexe near Haywards Heath | £35 | £256 |
| Granny Annexe near Burgess Hill | £36 | £256 |
| Granny Annexe near Crawley | £38 | £255 |
| Granny Annexe near East Grinstead | £37 | £259 |
| Granny Annexe near Horsham | £38 | £265 |
| Granny Annexe near Horley | £38 | £258 |
| Granny Annexe near Crowborough | £36 | £258 |
| Granny Annexe near Brighton and Hove | £35 | £252 |
| Granny Annexe near Redhill | £41 | £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 - £17,476

Two storey extension - £87,964

Build a timber frame extension - £25,976

Build a swimming pool - £80,976

Single storey extension - £54,520

Side return extension - £41,230

Install an RSJ - £2,176

Outbuilding - £9,976

Build a Mansard loft conversion - £51,976

Loft conversion - £33,525

Build a kitchen extension - £41,976

Hip to gable loft conversion - £41,976

Granny annexe - £86,976

Garden office - £9,976

Convert a Garage - £15,976

Garage - £18,476

Build a flat roof extension - £21,976

Build a dormer loft conversion - £41,976

Concrete foundations - £6,226

Convert a bungalow loft - £28,976

Convert a basement - £37,230