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Flat roof extension cost in Blackburn

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 Blackburn?

A flat roof extension ranges from the cheapest of £21,080 (COMPLETE BUILDING SERVICES based in BB2) to the dearest of £26,400 (Ridgesmart Roofing Ltd based in BB2), 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 Blackburn by posting a job with HaMuch. We'll send it to extension builders in Blackburn.

Estimates for flat roof extension near Blackburn

Estimates for common extension builder jobs in Blackburn;

JobEstimate
Underpinning a house£17,210
Build a two storey extension£87,566
Build a timber frame extension£25,710
Install a swimming pool£80,710
Cost to build a single storey extension£49,208
Cost to build a side return extension£38,242
Install an RSJ£1,910
Build an outbuilding£9,710
Build a mansard loft conversion£51,710
Cost of a loft conversion£31,035
Build a kitchen extension£41,710
Build a hip to gable loft conversion£41,710
Build a granny annexe£86,710
Build a garden office£9,710
Convert a garage£15,710
Build a new garage£18,210
Build a flat roof extension£21,710
Build a dormer loft conversion£41,710
Lay a concrete foundation£5,960
Convert a bungalow loft£28,710
Basement conversion cost£34,242
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Rates for other Blackburn 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 Blackburn
Estimate Flat roof extension cost in Blackburn based on hourly/daily rate (excluding VAT or callout charges)
Business name Flat roof extension cost
PREMIER CONSTRUCTION T/A, Blackburn, BB1 £21,520
Builder for u-northwest-cheap-try-Me, Blackburn, BB1 £21,512
M. Pickering Builder & Joiner, Beardwood, BB2 £21,544
East Lancs Construction Ltd, Beardwood, BB2 £21,512
Ridgesmart Roofing Ltd, Blackburn, BB2 £26,400
D Parker Design & Build, Lancashire, BB1 £21,608
Graham Haworth Building Contractors, Blackburn, BB1 £21,544
BRYAN LEE BUILDING CONST LTD, Beardwood, BB2 £21,512
WM Brickwork & Pointing, Blackburn, BB1 £21,520
COMPLETE BUILDING SERVICES, Blackburn, BB2 £21,080
Garry Ryan Property Repairs, Blackburn, BB1 £21,560
Lonsdale Construction, Blackburn, BB1 £21,544
J. Grimshaw, Accrington, BB5 £21,544
Garage Conversions by Joe Hanlon, Accrington, BB5 £21,576
Simply Damp Proofing, Dinckley, BB6 £21,544
Techbuild Construction North West Ltd, Ribchester, Lancashire, PR3 £21,488
Darren Gaynor, Accrington, BB5 £21,568
NOBLETT BUILDING SERVICES, Clitheroe, BB7 £21,512
New Line Construction, Preston, Preston, Preston, PR5 £21,456
O. Morris Construction, Bamber Bridge, PR5 £21,536
Buildscape, Rawtenstall, BB4 £21,576
Evershield, Preston, PR2 £21,536
Cherbale Property, Rawtenstall, BB4 £21,560
Ribble Reclamation, Ribble reclamation NW ltd, Ducie place, Preston, Lancashire, PR1 £21,480
Phil Marlow Builders, Preston, PR2 £21,528

Get extension builder rates instantly

Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Flat Roof Extension near Blackburn£29£215
Flat Roof Extension near Darwen£30£223
Flat Roof Extension near Accrington£29£215
Flat Roof Extension near Bamber Bridge£26£187
Flat Roof Extension near Chorley£26£191
Flat Roof Extension near Rawtenstall£26£190
Flat Roof Extension near Preston£26£188
Flat Roof Extension near Leyland£26£192
Flat Roof Extension near Fulwood£26£187
Flat Roof Extension near Burnley£26£193