From £87,312
Shape Project Management is an established and experienced local extension builder in Downton. Please contact us for a free, no obligation quote an...
From £87,152
Need an Extension Builder in Downton? Moores Build has been helping local clients (20 mile radius) with their extension buildering jobs for many ye...
From £87,136
Arkson builders ltd is an established and experienced local extension builder in Downton. Please contact us for a free, no obligation quote and com...
From £86,872
Downton, SP5
Need to find an Extension Builder near you for all your extension buildering work?
R F S BUILDERS provides a local, trusted extension build...
From £87,080
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,208
Downton, SP5
STEWART BUILDERS is an established and experienced local extension builder in Downton. Please contact us for a free, no obligation quote and compet...
From £87,144
Need to find an Extension Builder near you for all your extension buildering work?
MILESTONE BUILDING CONTRACTORS provides a local, trusted...
From £85,848
We specialise in Epoxy Resin and Polyurethane floor coatings and screeds (very durable and seamless flooring), designed for retail, factories, manu...
From £87,104
JJ Acquisitions ltd is a trusted extension builder serving customers in Downton and the surrounding area. Contact us to today to get a competitive ...

Building a granny annexe ranges from £85,848 (Floortrak Limited based in SO51) to £87,312 (Shape Project Management based in SP5), 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 Downton by posting a job with HaMuch. We will send it to extension builders in Downton who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Salisbury | £35 | £247 |
| Granny Annexe near New Forest | £32 | £245 |
| Granny Annexe near Romsey | £32 | £230 |
| Granny Annexe near Test Valley | £37 | £261 |
| Granny Annexe near Totton | £34 | £243 |
| Granny Annexe near Chandler's Ford | £34 | £245 |
| Granny Annexe near Eastleigh | £34 | £244 |
| Granny Annexe near Southampton | £34 | £243 |
| Granny Annexe near Andover | £40 | £248 |
| Granny Annexe near Christchurch | £36 | £251 |
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 - £17,417

Two storey extension - £87,875

Build a timber frame extension - £25,917

Build a swimming pool - £80,917

Single storey extension - £53,336

Side return extension - £40,564

Install an RSJ - £2,117

Outbuilding - £9,917

Build a Mansard loft conversion - £51,917

Loft conversion - £32,970

Build a kitchen extension - £41,917

Hip to gable loft conversion - £41,917

Granny annexe - £86,917

Garden office - £9,917

Convert a Garage - £15,917

Garage - £18,417

Build a flat roof extension - £21,917

Build a dormer loft conversion - £41,917

Concrete foundations - £6,167

Convert a bungalow loft - £28,917

Convert a basement - £36,564