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Select your affordable Portland extension builder
Portland, DT5
D WHYTON BUILDING SERVICES LTD is a trusted extension builder serving customers in Portland and the surrounding area. Contact us to today to get a ...
WEYMOUTH ROOFING CO. is an established and experienced local extension builder in Portland. Please contact us for a free, no obligation quote and c...
From £35,550
Need to find an Extension Builder near you for all your extension buildering work?
J FLANN BUILDING & MAINTENANCE provides a local, trusted...
From £34,050
Design Properties & Renovations is an established and experienced local extension builder in Portland. Please contact us for a free, no obligation ...
From £38,775
Our building services company Roofix and Build Ltd have twenty years experience of helping customers in Weymouth and the surrounding area by provid...
From £33,825
We are a small business priding oueselves on high quality works carried out with care and attention. We use a select few subcontractors to help com...
From £35,100
Weymouth based property Investment and Re-development: Upcycling discarded materials to provide bespoke interior refurbishments, full property reno...
From £34,200
Danny McGrady
DM Building & Property Maintenance is a trusted extension builder serving customers in Portland and the surrounding area. Contact us to today to ge...
From £33,900
Dorset Showhomes Ltd is an established extension buildering business in Portland. We come highly recommended and provide competitive quotes for you...
From £38,775
Chris Larner building services is a trusted extension builder serving customers in Portland and the surrounding area. Contact us to today to get a ...

Comparing extension builders estimates for Loft conversion gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost of a loft conversion in Portland by posting your job to extension builders in Portland.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Loft Conversion near Weymouth | £33 | £260 |
| Loft Conversion near Dorchester | £30 | £230 |
| Loft Conversion near Poole | £38 | £250 |
| Loft Conversion near Bournemouth | £38 | £257 |
| Loft Conversion near Yeovil | £34 | £294 |
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 - £17,606

Two storey extension - £88,160

Build a timber frame extension - £26,106

Build a swimming pool - £81,106

Single storey extension - £57,128

Side return extension - £42,697

Install an RSJ - £2,306

Outbuilding - £10,106

Build a Mansard loft conversion - £52,106

Loft conversion - £34,748

Build a kitchen extension - £42,106

Hip to gable loft conversion - £42,106

Granny annexe - £87,106

Garden office - £10,106

Convert a Garage - £16,106

Garage - £18,606

Build a flat roof extension - £22,106

Build a dormer loft conversion - £42,106

Concrete foundations - £6,356

Convert a bungalow loft - £29,106

Convert a basement - £38,697