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Frederick Head
Over 35 years experience
We are Gas Safe registered
We are Verified
We pride ourselves on great custom...
Darren Spencer
Need an Extension Builder in Thundersley? Ellis & James Builders Limited has been helping local clients (20 mile radius) with their extension build...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Witton & Pearce Builders in Essex is a trusted extension builder serving customers in Thundersley and the surrounding area. Contact us to today to ...
Billy Baverstock
Experienced extension builder ready to quote for your work. Capital Roofing Ltd is the best extension builder in Thundersley. No obligation free qu...
Property Maintenance are here to help customers who need an Extension Builder in Thundersley. We offer a competitive rate to complete all your exte...
Need to find an Extension Builder near you for all your extension buildering work?
JLS Building Services provides a local, trusted extensio...
Need an Extension Builder in Thundersley? CONCORD BUILDERS LIMITED has been helping local clients (20 mile radius) with their extension buildering ...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Building a granny annexe ranges from £86,456 (Capital Roofing Ltd based in SS13) 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 Thundersley by posting a job with HaMuch. We will send it to extension builders in Thundersley who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Thundersley | £38 | £251 |
| Granny Annexe near Rayleigh | £39 | £252 |
| Granny Annexe near Canvey Island | £39 | £256 |
| Granny Annexe near Wickford | £39 | £255 |
| Granny Annexe near Basildon | £39 | £251 |
| Granny Annexe near Southend-on-Sea | £37 | £247 |
| Granny Annexe near Stanford-le-Hope | £40 | £254 |
| Granny Annexe near Billericay | £38 | £248 |
| Granny Annexe near Brentwood | £39 | £255 |
| Granny Annexe near Thurrock | £41 | £260 |
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 - £17,572

Two storey extension - £88,108

Build a timber frame extension - £26,072

Build a swimming pool - £81,072

Single storey extension - £56,440

Side return extension - £42,310

Install an RSJ - £2,272

Outbuilding - £10,072

Build a Mansard loft conversion - £52,072

Loft conversion - £34,425

Build a kitchen extension - £42,072

Hip to gable loft conversion - £42,072

Granny annexe - £87,072

Garden office - £10,072

Convert a Garage - £16,072

Garage - £18,572

Build a flat roof extension - £22,072

Build a dormer loft conversion - £42,072

Concrete foundations - £6,322

Convert a bungalow loft - £29,072

Convert a basement - £38,310