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Derren Ward
Green Exteriors Ltd are here to help customers who need an Extension Builder in Darfield. We offer a competitive rate to complete all your extensio...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Trusted and professional extension builder in Darfield. Experienced in all extension buildering work and keeping within budget and on quote. Britis...
Need an Extension Builder in Darfield? Property Plus has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
MANVERS CONSTRUCTION is an established and experienced local extension builder in Darfield. Please contact us for a free, no obligation quote and c...
J CLARKE CONSTRUCTION LTD are here to help customers who need an Extension Builder in Darfield. We offer a competitive rate to complete all your ex...
Darfield, S73
Yorkshire Garage Openers is an established extension buildering business in Darfield. We come highly recommended and provide competitive quotes for...
Harvie Construction is an established and experienced local extension builder in Darfield. Please contact us for a free, no obligation quote and co...
Darfield, S73
DAVID LEAKE CONSTRUCTION LTD is an established and experienced local extension builder in Darfield. Please contact us for a free, no obligation quo...
Paul Chappell
Pc building services is a trusted extension builder serving customers in Darfield and the surrounding area. Contact us to today to get a competitiv...

Building a granny annexe ranges from £86,752 (J CLARKE CONSTRUCTION LTD based in S75) to £88,392 (Green Exteriors Ltd based in S60), 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 Darfield by posting a job with HaMuch. We will send it to extension builders in Darfield who will be happy to help you.
"Granny annexe space for mum with separate quarters" - S72, job posted 05/07/26
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Barnsley | £31 | £242 |
| Granny Annexe near Rotherham | £32 | £257 |
| Granny Annexe near Wickersley | £32 | £258 |
| Granny Annexe near Sheffield | £32 | £261 |
| Granny Annexe near Doncaster | £29 | £238 |
| Granny Annexe near Pontefract | £30 | £228 |
| Granny Annexe near Wakefield | £31 | £240 |
| Granny Annexe near Normanton | £30 | £233 |
| Granny Annexe near Ossett | £33 | £245 |
| Granny Annexe near Castleford | £30 | £225 |
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 - £17,577

Two storey extension - £88,115

Build a timber frame extension - £26,077

Build a swimming pool - £81,077

Single storey extension - £56,536

Side return extension - £42,364

Install an RSJ - £2,277

Outbuilding - £10,077

Build a Mansard loft conversion - £52,077

Loft conversion - £34,470

Build a kitchen extension - £42,077

Hip to gable loft conversion - £42,077

Granny annexe - £87,077

Garden office - £10,077

Convert a Garage - £16,077

Garage - £18,577

Build a flat roof extension - £22,077

Build a dormer loft conversion - £42,077

Concrete foundations - £6,327

Convert a bungalow loft - £29,077

Convert a basement - £38,364