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Anthony Withey
Trusted and professional extension builder in Cowes. Experienced in all extension buildering work and keeping within budget and on quote. A W PAVIN...
O NEILL CONSTRUCTION LTD is an established extension buildering business in Cowes. We come highly recommended and provide competitive quotes for yo...
Peter Fenn Property is a trusted extension builder serving customers in Cowes and the surrounding area. Contact us to today to get a competitive qu...
M.K Warner Building Services is an established extension buildering business in Cowes. We come highly recommended and provide competitive quotes fo...
Relax... you have found a reliable extension builder in Cowes. MA Builders is a friendly and reliable company based in Cowes who consider no job as...
P D Builders is an established and experienced local extension builder in Cowes. Please contact us for a free, no obligation quote and competitive ...
Allweather Building Services Ltd are here to help customers who need an Extension Builder in Cowes. We offer a competitive rate to complete all you...
Experienced extension builder ready to quote for your work. STONEHAM CONSTRUCTION LIMITED is the best extension builder in Cowes. No obligation fre...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,016
HISTORIC BUILD RESTORATION LTD are here to help customers who need an Extension Builder in Cowes. We offer a competitive rate to complete all your ...

Building a granny annexe ranges from £86,752 (Allweather Building Services Ltd based in PO12) to £87,192 (A W PAVING LTD based in SO31), 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 Ryde | £34 | £255 |
| 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 |
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 - £17,456

Two storey extension - £87,934

Build a timber frame extension - £25,956

Build a swimming pool - £80,956

Single storey extension - £54,120

Side return extension - £41,005

Install an RSJ - £2,156

Outbuilding - £9,956

Build a Mansard loft conversion - £51,956

Loft conversion - £33,338

Build a kitchen extension - £41,956

Hip to gable loft conversion - £41,956

Granny annexe - £86,956

Garden office - £9,956

Convert a Garage - £15,956

Garage - £18,456

Build a flat roof extension - £21,956

Build a dormer loft conversion - £41,956

Concrete foundations - £6,206

Convert a bungalow loft - £28,956

Convert a basement - £37,005