From £87,272
Need to find an Extension Builder near you for all your extension buildering work?
DPP Construction (David Price Partnership) provides a lo...
From £87,032
We are a family run business we 40 years experience delivering multiple projects from new developments . Extension. Loft conversion. Including foun...
From £86,992
Member since August 2026
H P Building Services Sussex is a one-stop solution for all your extension buildering needs. Establish over 10 years ago and covering 20 miles arou...
From £87,440
Need to find an Extension Builder near you for all your extension buildering work?
Main Construction provides a local, trusted extension bu...
From £87,200
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,880
Trusted and professional extension builder in Burgess Hill. Experienced in all extension buildering work and keeping within budget and on quote. St...
From £86,776
M Wesley General Builder & Property Maintenance is a trusted extension builder serving customers in Burgess Hill and the surrounding area. Contact ...
From £87,016
Trusted and professional extension builder in Burgess Hill. Experienced in all extension buildering work and keeping within budget and on quote. Go...
From £86,872
Need an Extension Builder in Burgess Hill? MPS Home Improvements Ltd has been helping local clients (20 mile radius) with their extension builderin...
From £86,992
Experienced extension builder ready to quote for your work. Brighton Marina Hand Car Wash is the best extension builder in Burgess Hill. No obligat...

Building a granny annexe ranges from £86,776 (M Wesley General Builder & Property Maintenance based in BN16) to £87,440 (Main Construction based in BN12), 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 Burgess Hill by posting a job with HaMuch. We will send it to extension builders in Burgess Hill who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Burgess Hill | £36 | £240 |
| Granny Annexe near Haywards Heath | £35 | £256 |
| Granny Annexe near Mid Sussex | £35 | £261 |
| Granny Annexe near Brighton and Hove | £35 | £251 |
| Granny Annexe near Brighton | £35 | £251 |
| Granny Annexe near Shoreham-by-Sea | £36 | £250 |
| Granny Annexe near Horsham | £38 | £265 |
| Granny Annexe near Crawley | £38 | £255 |
| Granny Annexe near Lancing | £37 | £251 |
| Granny Annexe near East Grinstead | £37 | £259 |
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 - £17,547

Two storey extension - £88,071

Build a timber frame extension - £26,047

Build a swimming pool - £81,047

Single storey extension - £55,944

Side return extension - £42,031

Install an RSJ - £2,247

Outbuilding - £10,047

Build a Mansard loft conversion - £52,047

Loft conversion - £34,193

Build a kitchen extension - £42,047

Hip to gable loft conversion - £42,047

Granny annexe - £87,047

Garden office - £10,047

Convert a Garage - £16,047

Garage - £18,547

Build a flat roof extension - £22,047

Build a dormer loft conversion - £42,047

Concrete foundations - £6,297

Convert a bungalow loft - £29,047

Convert a basement - £38,031