Extend your Denham with an extension

HaMuch is Excellent
Trustpilot

Flat roof extension cost in Denham

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 Denham?

A flat roof extension ranges from the cheapest of £21,840 (Peter Cox Ltd - Uxbridge based in UB8) to the dearest of £21,968 (Coste + Beno Ltd based in HA6), 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 Denham by posting a job with HaMuch. We'll send it to extension builders in Denham.

Estimates for flat roof extension near Denham

Estimates for common extension builder jobs in Denham;

JobEstimate
Underpinning a house£17,404
Build a two storey extension£87,856
Build a timber frame extension£25,904
Install a swimming pool£80,904
Cost to build a single storey extension£53,074
Cost to build a side return extension£40,416
Install an RSJ£2,104
Build an outbuilding£9,904
Build a mansard loft conversion£51,904
Cost of a loft conversion£32,847
Build a kitchen extension£41,904
Build a hip to gable loft conversion£41,904
Build a granny annexe£86,904
Build a garden office£9,904
Convert a garage£15,904
Build a new garage£18,404
Build a flat roof extension£21,904
Build a dormer loft conversion£41,904
Lay a concrete foundation£6,154
Convert a bungalow loft£28,904
Basement conversion cost£36,416
2. Enter postcode to get estimate
plus materials

to see who is available and get more information


Rates for other Denham 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 Denham
Estimate Flat roof extension cost in Denham based on hourly/daily rate (excluding VAT or callout charges)
Business name Flat roof extension cost
Total Services, 26 Truesdale Drive, Harefield, Uxbridge,, UB9 £21,856
Asset Lofts, 30 High Street, Harefield, Middlesex, UB9 £21,848
Sokhi Construction (UK) Ltd, Hillingdon, UB10 £21,896
P & S Contractors, Buckinghamshire, SL9 £21,952
Sheppard Construction Ltd, Denham, UB9 £21,896
DeHavilland Design & Build Limited, Middlesex, Greater London, HA4 £21,864
DeHavilland Design & Build Limited, Greater London, HA4 £21,952
CC Builders UK Development, Middlesex, UB8 £21,952
BP Keating, Uxbridge, UB10 £21,864
The Property Planner, Greater London, HA4 £21,952
D O C BUILDING SERVICES, Hillingdon, UB10 £21,872
Homeworks Roofing, Middlesex, UB10 £21,952
DE Carpentry and Construction, Gerrards Cross, SL9 £21,952
KPC BUILDING SERVICES LTD, Gerrards Cross, SL9 £21,872
MCCM BUILDING SERVICES LTD, Hillingdon, UB10 £21,872
PB Viking Construction Ltd, Greater London, UB8 £21,952
SL9 Building Services, Unit 111 Rye House 161 High Street, Ruislip, London, Greater London, HA4 £21,856
GS Design & Developments Ltd, Middlesex, UB10 £21,952
ROBINSON AND EDGSON BUILDERS, Iver, SL0 £21,888
Island Exhibitions Residential Interiors, Greater London, UB8 £21,952
Floyd Andrews Building Service, Ruislip, HA4 £21,864
CONSIDERATE BUILDING LIMITED, Gerrards Cross, SL9 £21,896
Peter Cox Ltd - Uxbridge, Peter Cox Ltd, Unit 2 Sarum Complex, Sal, UB8 £21,840
6:59 Ltd, Gerrards Cross, Buckinghamshire, SL9 £21,872
Coste + Beno Ltd, Greater London, HA6 £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 Hillingdon£56£240
Flat Roof Extension near Gerrards Cross£37£244
Flat Roof Extension near Rickmansworth£36£241
Flat Roof Extension near Watford£37£239
Flat Roof Extension near Harrow£37£235
Flat Roof Extension near Slough£36£238
Flat Roof Extension near Bushey£37£240
Flat Roof Extension near Windsor & Maidenhead£36£238
Flat Roof Extension near Windsor£36£238
Flat Roof Extension near Ealing£38£237