Trusted and professional extension builder in RH18. Experienced in all extension buildering work and keeping within budget and on quote. Dance & Co...
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...
Relax... you have found a reliable extension builder in RH18. HOWCROFTS BUILDING SERVICES is a friendly and reliable company based in RH18 who cons...
From £86,600
J Taylor
Taylor Building & Maintenance Services is an established extension buildering business in RH18. We come highly recommended and provide competitive ...
From £86,528
Adam Harman
AJH Construction and Fencing is an established extension buildering business in RH18. We come highly recommended and provide competitive quotes fo...
From £87,056
Whitehouse Build & Design Ltd is an established and experienced local extension builder in RH18. Please contact us for a free, no obligation quote ...
From £87,224
GB Brickwork is a trusted extension builder serving customers in RH18 and the surrounding area. Contact us to today to get a competitive quote for ...
From £86,824
James Knott & Son Ltd are here to help customers who need an Extension Builder in RH18. We offer a competitive rate to complete all your extension ...
From £87,152
Duaris Ltd is an established extension buildering business in RH18. We come highly recommended and provide competitive quotes for your work.

Building a granny annexe ranges from £86,528 (AJH Construction and Fencing based in RH19) to £87,336 (Dance & Co Developments based in RH19), 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 RH18 by posting a job with HaMuch. We will send it to extension builders in RH18 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near East Grinstead | £37 | £259 |
| Granny Annexe near Crowborough | £36 | £258 |
| Granny Annexe near Mid Sussex | £35 | £261 |
| Granny Annexe near Crawley | £38 | £255 |
| Granny Annexe near Haywards Heath | £35 | £256 |
| Granny Annexe near Horley | £38 | £258 |
| Granny Annexe near Tunbridge Wells | £37 | £258 |
| Granny Annexe near Burgess Hill | £36 | £240 |
| Granny Annexe near Wealden | £35 | £256 |
| Granny Annexe near Tonbridge | £38 | £254 |
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 - £17,505

Two storey extension - £88,008

Build a timber frame extension - £26,005

Build a swimming pool - £81,005

Single storey extension - £55,107

Side return extension - £41,560

Install an RSJ - £2,205

Outbuilding - £10,005

Build a Mansard loft conversion - £52,005

Loft conversion - £33,800

Build a kitchen extension - £42,005

Hip to gable loft conversion - £42,005

Granny annexe - £87,005

Garden office - £10,005

Convert a Garage - £16,005

Garage - £18,505

Build a flat roof extension - £22,005

Build a dormer loft conversion - £42,005

Concrete foundations - £6,255

Convert a bungalow loft - £29,005

Convert a basement - £37,560