Witton & Pearce Builders in Essex is a trusted extension builder serving customers in SS12 and the surrounding area. Contact us to today to get a c...
Billy Baverstock
Experienced extension builder ready to quote for your work. Capital Roofing Ltd is the best extension builder in SS12. No obligation free quotes an...
Property Maintenance are here to help customers who need an Extension Builder in SS12. We offer a competitive rate to complete all your extension b...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need to find an Extension Builder near you for all your extension buildering work?
RV BUILDING & MAINTENANCE provides a local, trusted exte...
Experienced extension builder ready to quote for your work. HIGHLAND CONSTRUCTION is the best extension builder in SS12. No obligation free quotes ...
Swaylie Cooper
Royal Roofing & building contractors is an established and experienced local extension builder in SS12. Please contact us for a free, no obligatio...
Need an Extension Builder in SS12? DG Construction Essex Ltd has been helping local clients (20 mile radius) with their extension buildering jobs f...
Concept Interiors Management Ltd is a trusted extension builder serving customers in SS12 and the surrounding area. Contact us to today to get a co...

Building a granny annexe ranges from £86,272 (Royal Roofing & building contractors based in SS12) to £87,544 (RJA Building & Maintenance Ltd based in SS11), 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 SS12 by posting a job with HaMuch. We will send it to extension builders in SS12 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Wickford | £39 | £255 |
| Granny Annexe near Basildon | £39 | £251 |
| Granny Annexe near Billericay | £38 | £248 |
| Granny Annexe near Rayleigh | £39 | £252 |
| Granny Annexe near Thundersley | £38 | £251 |
| Granny Annexe near Canvey Island | £39 | £256 |
| Granny Annexe near Stanford-le-Hope | £40 | £254 |
| Granny Annexe near Brentwood | £39 | £255 |
| Granny Annexe near Southend-on-Sea | £37 | £247 |
| Granny Annexe near Chelmsford | £38 | £258 |
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 - £17,463

Two storey extension - £87,945

Build a timber frame extension - £25,963

Build a swimming pool - £80,963

Single storey extension - £54,264

Side return extension - £41,086

Install an RSJ - £2,163

Outbuilding - £9,963

Build a Mansard loft conversion - £51,963

Loft conversion - £33,405

Build a kitchen extension - £41,963

Hip to gable loft conversion - £41,963

Granny annexe - £86,963

Garden office - £9,963

Convert a Garage - £15,963

Garage - £18,463

Build a flat roof extension - £21,963

Build a dormer loft conversion - £41,963

Concrete foundations - £6,213

Convert a bungalow loft - £28,963

Convert a basement - £37,086