Cost to build a flat roof extension in SW12

Flat roof extension cost in SW12

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 SW12?

A flat roof extension ranges from the cheapest of £21,840 (CleanDay London Ltd based in SW12) to the dearest of £24,000 (Felix Building based in SW16), 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 SW12 by posting a job with HaMuch. We'll send it to extension builders in SW12.

Estimates for flat roof extension near SW12

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	£17,471
	Build a two storey extension	£87,957
	Build a timber frame extension	£25,971
	Install a swimming pool	£80,971
	Cost to build a single storey extension	£54,424
	Cost to build a side return extension	£41,176
	Install an RSJ	£2,171
	Build an outbuilding	£9,971
	Build a mansard loft conversion	£51,971
	Cost of a loft conversion	£33,480
	Build a kitchen extension	£41,971
	Build a hip to gable loft conversion	£41,971
	Build a granny annexe	£86,971
	Build a garden office	£9,971
	Convert a garage	£15,971
	Build a new garage	£18,471
	Build a flat roof extension	£21,971
	Build a dormer loft conversion	£41,971
	Lay a concrete foundation	£6,221
	Convert a bungalow loft	£28,971
	Basement conversion cost	£37,176

Business name	Flat roof extension cost
Barnard Interiors, London, Greater London, SW12	£21,944
IDL Contractors Ltd, London, Greater London, SW12	£21,848
M. Watkins and Sons Ltd, Greater London, SW12	£21,944
R C BUILDER, Balham, SW12	£21,864
Zenico, 53 Carminia Road, London, Greater London, SW17	£21,848
Interior Space Solutions Ltd, Surrey, SW12	£21,944
CleanDay London Ltd, 242 Hydethorpe Road, Balham, London, Gre, SW12	£21,840
Basenet Ltd, London, SW4	£21,944
Hughes Developments, London, Greater London, SW17	£21,848
RenoView Ltd, Greater London, SW16	£21,944
William Coles, London, Surrey, SW16	£21,848
JT Allen, Rettendon, Chelmsford, SW17	£22,000
Apartment Renovation Limited, 197 Macmillan Way, London, Greater London, sw17	£21,848
Studio Such, Greater London, SW16	£21,944
Build and Convert Services, 10 Streatleigh Parade, Streatham High Road, London, Greater London, SW16	£21,848
Orchestrate, 53 Webb's Road, London, Greater London, SW11	£21,840
All Trades Builders, Brixton, SW2	£21,864
Grosvenor House Construction Ltd., 112A Clapham Park Road, London, London, Greater London, sw4	£21,848
Felix Building, London, SW16	£24,000
Damian Szlema Construction LTD, Leigham Avenue, Lond, SW16	£21,864
Nova Renovation, Nova, London, SW16	£21,848
Bricklaying Services, Tooting, SW17	£21,888
M PIETROW T/A M P BUILDERS, Brixton, SW2	£21,864
STARLETT BUILDING, Tooting, SW17	£21,864
Hawksmoor Construction, Clapham Common, SW4	£21,944

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Flat roof extension cost in SW12

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Flat roof extension cost in SW12

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