Cost to build a flat roof extension in Brixton

Flat roof extension cost in Brixton

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 Brixton?

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 Brixton by posting a job with HaMuch. We'll send it to extension builders in Brixton.

Estimates for flat roof extension near Brixton

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	£87,956
	Build a timber frame extension	£25,971
	Install a swimming pool	£80,971
	Cost to build a single storey extension	£54,411
	Cost to build a side return extension	£41,169
	Install an RSJ	£2,171
	Build an outbuilding	£9,971
	Build a mansard loft conversion	£51,971
	Cost of a loft conversion	£33,474
	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	£37,169

Business name	Flat roof extension cost
All Trades Builders, Brixton, SW2	£21,864
Atelier 10, Brixton, SW2	£21,888
M PIETROW T/A M P BUILDERS, Brixton, SW2	£21,864
Bantos Limited, Greater London, sw2	£21,944
Magic Projects London Ltd, 50A Palace Road, London, Greater London, SW2	£21,848
Adam-Ashton &associates Limited, Greater London, SW2	£21,944
CleanDay London Ltd, 242 Hydethorpe Road, Balham, London, Gre, SW12	£21,840
Complete Construction London Limited, Streatham, SW2	£21,856
Build and Convert Services, 10 Streatleigh Parade, Streatham High Road, London, Greater London, SW16	£21,848
Basenet Ltd, London, SW4	£21,944
RenoView Ltd, Greater London, SW16	£21,944
William Coles, London, Surrey, SW16	£21,848
R C BUILDER, Balham, SW12	£21,864
Grosvenor House Construction Ltd., 112A Clapham Park Road, London, London, Greater London, sw4	£21,848
M. Watkins and Sons Ltd, Greater London, SW12	£21,944
Damian Szlema Construction LTD, Leigham Avenue, Lond, SW16	£21,864
Nova Renovation, Nova, London, SW16	£21,848
Studio Such, Greater London, SW16	£21,944
PEAKE Projects London Ltd, London, Greater London, SW16	£21,848
ASAP Renovation, 101 Clapham High St., Clapham, Greater London, SW4	£21,848
Felix Building, London, SW16	£24,000
General Refurbishment BV Ltd, Stockwell, SW9	£21,888
Gustav Building Services, Greater London, SW4	£21,944
Gustav Building Services, London, Greater London, SW4	£21,848
Barnard Interiors, London, Greater London, SW12	£21,944

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Flat roof extension cost in Brixton

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Flat roof extension cost in Brixton

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