Extend your SO40 with an extension

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 SO40?

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Flat roof extension cost in SO40

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 SO40?

A flat roof extension ranges from the cheapest of £21,200 (James Golby Construction based in SO51) to the dearest of £21,888 (Shay building LTD based in SO15), 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 SO40 by posting a job with HaMuch. We'll send it to extension builders in SO40.

Estimates for build a flat roof extension near SO40

Estimates for common extension builder jobs in SO40;

JobEstimate
Cost to underpin a house£17,232
Build a two storey extension£87,599
Cost to build a timber frame extension£25,732
Cost to build a swimming pool£80,732
Cost to build a single storey extension£49,650
Cost to build a side return extension£38,490
Cost to Install an RSJ£1,932
Build an outbuilding£9,732
Cost to build a mansard loft conversion£51,732
Cost of a loft conversion£31,242
Cost to build a kitchen extension£41,732
Build a hip to gable loft conversion£41,732
Build a granny annexe£86,732
Build a garden office£9,732
Cost of a garage conversion£15,732
Build a new garage£18,232
Cost to build a flat roof extension£21,732
Cost to build a dormer loft conversion£41,732
Lay a concrete foundation£5,982
Cost of a bungalow loft conversion£28,732
Basement conversion cost£34,490
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Rates for other SO40 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
Build a flat roof extension cost in SO40
Estimate Build a flat roof extension cost in SO40 based on hourly/daily rate (excluding VAT or callout charges)
Business name Build a flat roof extension cost
GDS Building & Maintenance Ltd, Totton, Southampton, SO40 £21,784
Safespec Building Services Limited, 6 Serle Gardens, Totton, Southampton, Ha, SO40 £21,792
Trowel On, Totton, SO40 £21,768
1st Oak Building Preservation & Maintenance, Southampton, SO16 £21,736
LMR BUILDING SERVICES LIMITED, Shirley, SO15 £21,736
KT Carpentry & Building Services, Hampshire, SO16 £21,816
Bailey Construction Services, Southampton, SO15 £21,760
Shay building LTD, Wilton aven , SO15 £21,888
MARK VIGRASS, Lyndhurst , SO43 £21,600
Loki Projects & Development, Hampshire, SO1 £21,784
DSH Roofing, Southampton, SO14 £21,712
Grant Construction, North Baddesley, SO52 £21,744
Hestia Trustins LTD, South Hampton, Hampshire, SO14 £21,680
AAConcepts, Hampshire, SO14 £21,712
LG PLANNING LIMITED, Hampshire, SO14 £21,776
Clever Build & Design, Castle Malwood, Minstead, Hampshire, SO43 £21,776
Mark Mckie, Southampton, Hampshire, SO17 £21,680
Dell Developments Ltd, Southampton, Hampshire, SO18 £21,672
Novare Plumbing Ltd, Hampshire, SO51 £21,848
T & S Construction, Bassett, SO16 £21,712
Ibcon Construction, Romsey, SO51 £21,776
BUY BUILDER LTD, Romsey, SO51 £21,768
E&B BUILDING SERVICES LTD, Romsey, SO51 £21,784
James Golby Construction, Romsey, Hampshire, SO51 £21,808
James Golby Construction, ROMSEY, SO51 £21,200

Get extension builder rates instantly

Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Build A Flat Roof Extension near Totton£30£216
Build A Flat Roof Extension near Southampton£30£215
Build A Flat Roof Extension near Romsey£28£203
Build A Flat Roof Extension near New Forest£28£211
Build A Flat Roof Extension near Eastleigh£30£215
Build A Flat Roof Extension near Chandler's Ford£30£216
Build A Flat Roof Extension near Hedge End£30£215
Build A Flat Roof Extension near Locks Heath£30£213
Build A Flat Roof Extension near Winchester£31£225
Build A Flat Roof Extension near Fareham£31£217