Cost to build a flat roof extension in SE8

Flat roof extension cost in SE8

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 SE8?

A flat roof extension ranges from the cheapest of £21,600 (Total Home Refurbishments Ltd based in SE13) to the dearest of £21,944 (Island design & Construction Ltd based in E14), 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 SE8 by posting a job with HaMuch. We'll send it to extension builders in SE8.

Estimates for flat roof extension near SE8

How much does a flat roof extension cost?
Flat roof extension cost per m2
Factors affecting the cost of flat roof extensions
Advantages and disadvantages of flat roofs
Which is cheaper: a flat roof or pitched roof?
How long does a flat roof extension take?
Do you need planning permission for a flat roof extension?
How long does a flat roof last?
Can you walk on a flat roof extension?
What insulation do I need for a flat roof extension?

	Job	Estimate
	Underpinning a house	£17,387
	Build a two storey extension	£87,831
	Build a timber frame extension	£25,887
	Install a swimming pool	£80,887
	Cost to build a single storey extension	£52,747
	Cost to build a side return extension	£40,233
	Install an RSJ	£2,087
	Build an outbuilding	£9,887
	Build a mansard loft conversion	£51,887
	Cost of a loft conversion	£32,694
	Build a kitchen extension	£41,887
	Build a hip to gable loft conversion	£41,887
	Build a granny annexe	£86,887
	Build a garden office	£9,887
	Convert a garage	£15,887
	Build a new garage	£18,387
	Build a flat roof extension	£21,887
	Build a dormer loft conversion	£41,887
	Lay a concrete foundation	£6,137
	Convert a bungalow loft	£28,887
	Basement conversion cost	£36,233

Business name	Flat roof extension cost
Island design & Construction Ltd, Greater London, E14	£21,944
Dumrea Building Construction Ltd, London, SE14	£21,888
CG Design and Build LTD., London Arena, Greater London, e14	£21,848
CG Design and Build LTD., Greater London, e14	£21,944
WiseContract, Studio 33, Unit 10, elizabeth Industrial Estate, Juno Way, London, Greater London, se14	£21,848
DWL Construction Ltd, London, SE14	£21,944
AZC BUILDING SERVICES, Greenwich, SE10	£21,864
blitbolt ltd, london, Greater London, SE4	£21,848
blitbolt ltd, Greater London, SE4	£21,944
Cheapest Builder, Rotherhithe, SE16	£21,888
MARMAREX, London, SE16	£21,944
MARMAREX, London, Greater London, SE16	£21,848
ROOSE CONSTRUCTION LTD, Rotherhithe, SE16	£21,864
Baseline Build & Renovate, London, Greater London, SE15	£21,848
ALFA Building Solutions Ltd, Greater London, E14	£21,944
ALFA Building Solutions Ltd, London, Greater London, E14	£21,848
Total Home Refurbishments Ltd, London, SE13	£21,600
Demiri Builder Ltd, London, SE13	£21,944
Trafalgar Building Company Limited, Greenwich, SE10	£21,864
SCL Design & Build Ltd, Londonderry, SE16	£21,944
Dule Vida Property Design Ltd, Greater London, SE13	£21,944
Storeyboard, Greater London, SE10	£21,944
Storeyboard, London, Greater London, SE10	£21,848
Prestige Roofing Limited, 70 Colomb Street, Greenwich, London, SE10	£21,896
Ballara Ltd, Greater London, SE16	£21,944

Extend your SE8 with an extension

Flat roof extension cost in SE8

Estimates for common extension builder jobs in SE8;

Rates for other SE8 trades

Flat roof extension cost in SE8

Get extension builder rates instantly