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Select your affordable Old Town extension builder
ATLAS BUILDING AND MAINT are here to help customers who need an Extension Builder in Old Town. We offer a competitive rate to complete all your ext...
Experienced extension builder ready to quote for your work. CG Renovations Ltd is the best extension builder in Old Town. No obligation free quotes...
Russell Channnon
At Templar Developments we work with our clients from thought to finish all the while keeping quality 110%. We cover all your construction needs on...
Need to find an Extension Builder near you for all your extension buildering work?
Heymann Builders Ltd provides a local, trusted extension...
Need to find an Extension Builder near you for all your extension buildering work?
S F CONSTRUCTION provides a local, trusted extension bu...
Need to find an Extension Builder near you for all your extension buildering work?
Gem Construction (Sussex) Ltd provides a local, trusted ...
Technique Roofing and Maintenance are here to help customers who need an Extension Builder in Old Town. We offer a competitive rate to complete all...
From £86,480
Krzysztof Jankowski
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,816
Experienced extension builder ready to quote for your work. Razvan Building Services Ltd is the best extension builder in Old Town. No obligation f...
From £87,176
Trusted and professional extension builder in Old Town. Experienced in all extension buildering work and keeping within budget and on quote. J L BU...

Building a granny annexe ranges from £86,480 (Pro For You based in BN22) to £87,240 (CG Renovations Ltd based in BN23), 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 Old Town by posting a job with HaMuch. We will send it to extension builders in Old Town who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Eastbourne | £32 | £245 |
| Granny Annexe near Hailsham | £31 | £243 |
| Granny Annexe near Seaford | £34 | £243 |
| Granny Annexe near Bexhill-on-Sea | £31 | £243 |
| Granny Annexe near Wealden | £35 | £256 |
| Granny Annexe near Hastings | £31 | £246 |
| Granny Annexe near Brighton and Hove | £35 | £252 |
| Granny Annexe near Brighton | £35 | £253 |
| Granny Annexe near Crowborough | £36 | £258 |
| Granny Annexe near Burgess Hill | £36 | £256 |
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 - £17,421

Two storey extension - £87,881

Build a timber frame extension - £25,921

Build a swimming pool - £80,921

Single storey extension - £53,416

Side return extension - £40,609

Install an RSJ - £2,121

Outbuilding - £9,921

Build a Mansard loft conversion - £51,921

Loft conversion - £33,008

Build a kitchen extension - £41,921

Hip to gable loft conversion - £41,921

Granny annexe - £86,921

Garden office - £9,921

Convert a Garage - £15,921

Garage - £18,421

Build a flat roof extension - £21,921

Build a dormer loft conversion - £41,921

Concrete foundations - £6,171

Convert a bungalow loft - £28,921

Convert a basement - £36,609