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Flat roof extension cost in CB21

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 CB21?

A flat roof extension ranges from the cheapest of £21,760 (SK Builders and Decorators Ltd based in CB4) to the dearest of £23,200 (ALLIED BUILDING ASSOCIATES LTD based in CB22), 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 CB21 by posting a job with HaMuch. We'll send it to extension builders in CB21.

Estimates for flat roof extension near CB21

Estimates for common extension builder jobs in CB21;

JobEstimate
Underpinning a house£17,396
Build a two storey extension£87,844
Build a timber frame extension£25,896
Install a swimming pool£80,896
Cost to build a single storey extension£52,920
Cost to build a side return extension£40,330
Install an RSJ£2,096
Build an outbuilding£9,896
Build a mansard loft conversion£51,896
Cost of a loft conversion£32,775
Build a kitchen extension£41,896
Build a hip to gable loft conversion£41,896
Build a granny annexe£86,896
Build a garden office£9,896
Convert a garage£15,896
Build a new garage£18,396
Build a flat roof extension£21,896
Build a dormer loft conversion£41,896
Lay a concrete foundation£6,146
Convert a bungalow loft£28,896
Basement conversion cost£36,330
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Rates for other CB21 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 CB21
Estimate Flat roof extension cost in CB21 based on hourly/daily rate (excluding VAT or callout charges)
Business name Flat roof extension cost
BOWIE CONSTRUCTION LTD, Balsham, CB21 £21,792
EXP Property Maintenance, Suite 18, Middle Court Copley Hill Busin, CB22 £21,848
Find a Handyman (Neil), Little Shelford, CB22 £21,840
DEBRAY BUILDERS, Little Shelford, CB22 £21,832
ALLIED BUILDING ASSOCIATES LTD, Cambridge, CB22 £23,200
D Stebbings, Cambrigde Central South, CB1 £21,832
TSN Consultants Ltd, Cambridge, CB1 £21,864
Pinnacle Construction, Haverhill, CB9 £21,784
SP-Building Services Ltd, Cambridge, CB5 £21,856
Beaumont Construction, Cambridge, Cambridge, Cambridgeshire, CB1 £21,856
CROWNBUILD, Cambrigde Central South, CB1 £21,840
All In One Building Services, Lode, CB25 £21,800
J&G HARDING BUILDING SERVICES, Newmarket, CB8 £21,792
Coulson Building Group, William James House, Cowley Road, Cambri, CB4 £21,856
Doug Misson Construction, Newmarket, CB8 £21,792
Adams & Eden Restoration, Newmarket, Cb8 £21,880
Louise Swarbrick Design, Cambridgeshire, CB3 £21,928
SK Builders and Decorators Ltd , Cambridge, CB4 £21,760
John Kirk Building Ltd, Newmarket, CB8 £21,840
Fenlake Construction, Cambridgeshire, CB23 £21,936
Foreman & Hill, Lode, Lode, Cambridgeshire, CB25 £21,816
Bespoke Build and Restoration ltd, Cambridge, Cambridgeshire, CB25 £21,832
SturdyBuild, 34 Thornton Close, Cambridge, Cambridgeshire, CB3 £21,848
ENVIRON CONSTRUCTION, Newport, CB11 £21,872
O G Conversions, Saffron walden, CB11 £21,904

Get extension builder rates instantly

Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Flat Roof Extension near Haverhill£32£221
Flat Roof Extension near Cambridge£33£234
Flat Roof Extension near South Cambridgeshire£37£258
Flat Roof Extension near Ely£32£230
Flat Roof Extension near Sudbury£30£208
Flat Roof Extension near Bishop's Stortford£36£229
Flat Roof Extension near Bury St Edmunds£29£215
Flat Roof Extension near Braintree£32£218
Flat Roof Extension near East Hertfordshire£37£242
Flat Roof Extension near Biggleswade£35£229