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Flat roof extension cost in Portland

A flat roof extension is a great way to add extra space to your home without splashing out on the costs of a pitched roof extension. Often exempt from planning permission rules, you can build a flat roof extension up to 3 metres in height as long as it's not visible from a road. But how much do they cost in Portland?

A flat roof extension ranges from the cheapest of £21,200 (Poundbury Build and Maintenance based in DT1) to the dearest of £22,008 (AKHURST PLUMBING AND HEATING LIMITED based in DT5), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes. 

Find out how much your flat roof extension will cost in Portland by posting a job with HaMuch. We'll send it to extension builders in Portland.

Estimates for flat roof extension near Portland

Estimates for common extension builder jobs in Portland;

JobEstimate
Underpinning a house£17,282
Build a two storey extension£87,674
Build a timber frame extension£25,782
Install a swimming pool£80,782
Cost to build a single storey extension£50,648
Cost to build a side return extension£39,052
Install an RSJ£1,982
Build an outbuilding£9,782
Build a mansard loft conversion£51,782
Cost of a loft conversion£31,710
Build a kitchen extension£41,782
Build a hip to gable loft conversion£41,782
Build a granny annexe£86,782
Build a garden office£9,782
Convert a garage£15,782
Build a new garage£18,282
Build a flat roof extension£21,782
Build a dormer loft conversion£41,782
Lay a concrete foundation£6,032
Convert a bungalow loft£28,782
Basement conversion cost£35,052
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Rates for other Portland trades

Appliance Repair Specialist
Bathroom Fitter
Builder
Carpenter and Joiner
Cleaner
Conservatory Specialist
Door Fitter
Drain Specialist
Driveway Specialist
Electrician
Extension Builder
Fencer
Fire and Security Specialist
Flooring Specialist
Gardener
Handyman
Heating Engineer
Kitchen Fitter
Landscaper
Painter and Decorator
Patio and Path Specialist
Plasterer
Plumber
Removals and Storage
Roofer
Tiler
Window Fitter
Flat roof extension cost in Portland
Estimate Flat roof extension cost in Portland based on hourly/daily rate (excluding VAT or callout charges)
Business name Flat roof extension cost
D WHYTON BUILDING SERVICES LTD, Portland, DT5 £21,792
AKHURST PLUMBING AND HEATING LIMITED , Weymouth , DT5 £22,008
Upcycle Interiors Limited, Dorset, DT4 £21,952
Design Properties & Renovations, Dorset, DT4 £21,952
WEYMOUTH ROOFING CO., Weymouth, DT4 £21,280
DM Building & Property Maintenance, Weymouth, DT4 £21,600
BUILDCRAFT CONSTRUCTION LTD, Weymouth, DT4 £21,872
J FLANN BUILDING & MAINTENANCE, Weymouth, DT4 £21,872
Roofix and Build Ltd, Weymouth, DT4 £21,952
Harbour Property Improvements Limited, Dorset, DT4 £21,952
Dorset Showhomes Ltd, 8, Granby Court, Weymouth, Dorset, DT4 £21,720
Chris Larner building services, Dorset, Dt3 £21,952
CMH Leadwork & Roofing Services Ltd, 20 Rodden Row, Abbotsbury, Weymouth, Dor, DT3 £21,928
Poundbury Build and Maintenance, Dorchester, DT1 £21,200
Steven Clark Building Services, Dorchester, DT1 £21,880
Dorset Build & Maintenance Company Limited, Dorchester, DT2 £21,360
Stuart's Building and Maintenance, Charminster, Dorches, DT2 £21,600
M J MUDFORD BUILDG CONTRACTOR, Allington, DT6 £21,952
Campbell Clarke Construction LTD, Dorset, BH20 £21,856
WILD CONSTRUCTION LTD, Allington, DT6 £21,968

Get extension builder rates instantly

Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Flat Roof Extension near Weymouth£28£221
Flat Roof Extension near Dorchester£26£201
Flat Roof Extension near Poole£33£215
Flat Roof Extension near Bournemouth£33£220
Flat Roof Extension near Yeovil£28£242