Cost to build a flat roof extension in SW15

Flat roof extension cost in SW15

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 SW15?

A flat roof extension ranges from the cheapest of £21,832 (AVIB City Construction Ltd based in SW19) to the dearest of £21,944 (Lala Brothers Construction Ltd based in SW15), 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 SW15 by posting a job with HaMuch. We'll send it to extension builders in SW15.

Estimates for flat roof extension near SW15

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?
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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	£17,381
	Build a two storey extension	£87,821
	Build a timber frame extension	£25,881
	Install a swimming pool	£80,881
	Cost to build a single storey extension	£52,619
	Cost to build a side return extension	£40,161
	Install an RSJ	£2,081
	Build an outbuilding	£9,881
	Build a mansard loft conversion	£51,881
	Cost of a loft conversion	£32,634
	Build a kitchen extension	£41,881
	Build a hip to gable loft conversion	£41,881
	Build a granny annexe	£86,881
	Build a garden office	£9,881
	Convert a garage	£15,881
	Build a new garage	£18,381
	Build a flat roof extension	£21,881
	Build a dormer loft conversion	£41,881
	Lay a concrete foundation	£6,131
	Convert a bungalow loft	£28,881
	Basement conversion cost	£36,161

Business name	Flat roof extension cost
Building Vision London Ltd, London, SW15	£21,888
KEVIN GEAR BUILDING & MAINTIAN, Putney, SW15	£21,856
Julia Property Refurbishment, Putney, SW15	£21,888
Design and Build London, London, Greater London, SW15	£21,840
Lala Brothers Construction Ltd, London, SW15	£21,944
Essex and London Construction ELC, Hill House, 210 Upper Richmond Road, Putney, SW15	£21,840
Ethos Urban Design, London, Greater London, SW15	£21,840
AVIB City Construction Ltd, London, SW19	£21,832
AJ Wells, Putney, SW15	£21,880
Seven Plus Developments, 70 Upper Richmond Road, London, Greater London, SW15	£21,840
Seven Plus Developments, Greater London, SW15	£21,944
GP Basement Building & Refurbishment, London, Greater London, sw15	£21,840
Her Own Space, London, SW18	£21,944
VERO CONSTRUCTION LTD, Putney, SW15	£21,864
SW15 BUILDERS LTD, Greater London, SW15	£21,944
URBAN LIVING.LONDON, Greater London, SW15	£21,944
Perfect Loft, London, SW18	£21,944
MSZ Projects, Greater London, SW15	£21,944
WBS Refurbishments and Renovations LTD, London, Greater London, SW15	£21,840
CW BUILDING SERVICES, Earlsfield, SW18	£21,864
Qubitat [tbc], London, Greater London, SW19	£21,840
Efficient Standard Home Improvement London Ltd, 59 Galgate Close, London, Greater London, SW19	£21,840
Red Box Maintenance Ltd, Greater London, SW6	£21,944
Red Box, London, Greater London, SW6	£21,840
Simply Extensions & Lofts Ltd, London, Greater London, SW6	£21,840

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Flat roof extension cost in SW15

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Flat roof extension cost in SW15

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