From £87,032
Col-In the Builder is a trusted extension builder serving customers in Darnley and the surrounding area. Contact us to today to get a competitive q...
From £87,160
Kenmure Joinery Services are here to help customers who need an Extension Builder in Darnley. We offer a competitive rate to complete all your exte...
From £87,080
Adelphi Design & Construction Ltd is an established and experienced local extension builder in Darnley. Please contact us for a free, no obligation...
From £87,296
Need an Extension Builder in Darnley? Gman-Joinery & Builders has been helping local clients (20 mile radius) with their extension buildering jobs ...
From £86,952
Relax... you have found a reliable extension builder in Darnley. DS Builders is a friendly and reliable company based in Darnley who consider no jo...
From £86,928
J & J Property Services is an established extension buildering business in Darnley. We come highly recommended and provide competitive quotes for y...
From £86,808
Boyle Construction Glasgow Ltd is a trusted extension builder serving customers in Darnley and the surrounding area. Contact us to today to get a c...
From £87,120
Relax... you have found a reliable extension builder in Darnley. Roughcasting is a friendly and reliable company based in Darnley who consider no j...
From £86,856
Need to find an Extension Builder near you for all your extension buildering work?
Montgomery Wet Trades provides a local, trusted extensio...
From £86,848
Need an Extension Builder in Darnley? Collum & Scott Roughcasting has been helping local clients (20 mile radius) with their extension buildering j...

Building a granny annexe ranges from £86,808 (Boyle Construction Glasgow Ltd based in G77) to £87,296 (Gman-Joinery & Builders based in G13), 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 Darnley by posting a job with HaMuch. We will send it to extension builders in Darnley who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Giffnock | £35 | £260 |
| Granny Annexe near Paisley | £34 | £259 |
| Granny Annexe near Barrhead | £35 | £255 |
| Granny Annexe near Newton Mearns | £35 | £263 |
| Granny Annexe near Renfrew | £35 | £263 |
| Granny Annexe near Glasgow | £35 | £259 |
| Granny Annexe near Rutherglen | £34 | £255 |
| Granny Annexe near Johnstone | £52 | £381 |
| Granny Annexe near Erskine | £34 | £258 |
| Granny Annexe near Clydebank | £35 | £264 |
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 - £17,508

Two storey extension - £88,012

Build a timber frame extension - £26,008

Build a swimming pool - £81,008

Single storey extension - £55,160

Side return extension - £41,590

Install an RSJ - £2,208

Outbuilding - £10,008

Build a Mansard loft conversion - £52,008

Loft conversion - £33,825

Build a kitchen extension - £42,008

Hip to gable loft conversion - £42,008

Granny annexe - £87,008

Garden office - £10,008

Convert a Garage - £16,008

Garage - £18,508

Build a flat roof extension - £22,008

Build a dormer loft conversion - £42,008

Concrete foundations - £6,258

Convert a bungalow loft - £29,008

Convert a basement - £37,590