From £87,072
Trusted and professional extension builder in Cowes. Experienced in all extension buildering work and keeping within budget and on quote. Custom ha...
From £87,112
'custom is all about ideas, about creating the right space for the right lifestyle, about design, function, environment and installation. above all...
From £87,176
GKW BUILDING+DIY is an established and experienced local extension builder in Cowes. Please contact us for a free, no obligation quote and competit...
From £86,976
Cowes, PO31
Oakland Construction & Maintenance is an established extension buildering business in Cowes. We come highly recommended and provide competitive quo...
From £86,888
Need an Extension Builder in Cowes? DJR CONSTRUCTION has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £87,208
Relax... you have found a reliable extension builder in Cowes. JP HILLMAN CARPTRY & GEN BUILD is a friendly and reliable company based in Cowes who...
From £86,880
P D Builders is an established and experienced local extension builder in Cowes. Please contact us for a free, no obligation quote and competitive ...
From £87,024
Experienced extension builder ready to quote for your work. STONEHAM CONSTRUCTION LIMITED is the best extension builder in Cowes. No obligation fre...
From £86,976
O NEILL CONSTRUCTION LTD is an established extension buildering business in Cowes. We come highly recommended and provide competitive quotes for yo...
From £87,088
Relax... you have found a reliable extension builder in Cowes. BRIAN NEWLYN BUILDERS is a friendly and reliable company based in Cowes who consider...

Building a granny annexe ranges from £86,880 (P D Builders based in PO30) to £87,208 (JP HILLMAN CARPTRY & GEN BUILD based in PO30), 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 Cowes by posting a job with HaMuch. We will send it to extension builders in Cowes who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Isle of Wight | £34 | £246 |
| Granny Annexe near Lee-on-the-Solent | £35 | £249 |
| Granny Annexe near Gosport | £35 | £246 |
| Granny Annexe near Locks Heath | £33 | £240 |
| Granny Annexe near Fareham | £35 | £250 |
| Granny Annexe near Portsmouth | £36 | £250 |
| Granny Annexe near Hedge End | £34 | £244 |
| Granny Annexe near Southampton | £34 | £243 |
| Granny Annexe near Totton | £34 | £243 |
| Granny Annexe near Eastleigh | £34 | £244 |
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 - £17,540

Two storey extension - £88,060

Build a timber frame extension - £26,040

Build a swimming pool - £81,040

Single storey extension - £55,800

Side return extension - £41,950

Install an RSJ - £2,240

Outbuilding - £10,040

Build a Mansard loft conversion - £52,040

Loft conversion - £34,125

Build a kitchen extension - £42,040

Hip to gable loft conversion - £42,040

Granny annexe - £87,040

Garden office - £10,040

Convert a Garage - £16,040

Garage - £18,540

Build a flat roof extension - £22,040

Build a dormer loft conversion - £42,040

Concrete foundations - £6,290

Convert a bungalow loft - £29,040

Convert a basement - £37,950