Cost to build a flat roof extension in SW18

Flat roof extension cost in SW18

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 SW18?

A flat roof extension ranges from the cheapest of £21,840 (Finethorp Limited (Renovations) based in SW18) to the dearest of £23,200 (Soceanu Construction Ltd based in SW18), 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 SW18 by posting a job with HaMuch. We'll send it to extension builders in SW18.

Estimates for flat roof extension near SW18

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	£17,444
	Build a two storey extension	£87,916
	Build a timber frame extension	£25,944
	Install a swimming pool	£80,944
	Cost to build a single storey extension	£53,886
	Cost to build a side return extension	£40,874
	Install an RSJ	£2,144
	Build an outbuilding	£9,944
	Build a mansard loft conversion	£51,944
	Cost of a loft conversion	£33,228
	Build a kitchen extension	£41,944
	Build a hip to gable loft conversion	£41,944
	Build a granny annexe	£86,944
	Build a garden office	£9,944
	Convert a garage	£15,944
	Build a new garage	£18,444
	Build a flat roof extension	£21,944
	Build a dormer loft conversion	£41,944
	Lay a concrete foundation	£6,194
	Convert a bungalow loft	£28,944
	Basement conversion cost	£36,874

Business name	Flat roof extension cost
MAF Contracts Ltd, Greater London, SW18	£21,944
The Sash Factory, Londonderry, sw18	£21,944
Finethorp Limited (Renovations), London, Greater London, SW18	£21,840
Finethorp Limited, Earlsfield, SW18	£21,960
Beatrix Renovations and Repairs, 57 Longstaff Road, wandsworth, Greater London, sw18	£21,840
KRANE CONSTRUCTION LIMITED, Earlsfield, SW18	£21,864
Newspace Interiors, London, Sw18	£21,944
Cadman Design and Build, Surrey, SW18	£21,944
Encompass London, 338 Garratt Lane, London, Greater London, SW18	£21,840
West Hill Projects, Greater London, SW18	£21,840
Saville Construction (London) Ltd., Greater London, SW18	£21,840
Qualitas Construction Ltd, Earlsfield, SW18	£21,864
NUOVO CONSTRUCTION, Greater London, SW18	£21,944
StructurAll, Londonderry, SW18	£21,944
BBC GENERAL CONSTRUCTION LTD, Earlsfield, SW18	£21,864
Soceanu Construction Ltd, London , SW18	£23,200
Fresh Start, Earlsfield, SW18	£21,880
Olaf Construction, Greater London, SW18	£21,944
Renovations Tm Ltd, 517 Old York Rd, Wandsworth, London, Surrey, SW18	£21,840
The Patio Co, Earlsfield, SW18	£21,880
Smart Maintenance + Limited, 113 Elborough Street, London, Greater London, SW18	£21,840
CW BUILDING SERVICES, Earlsfield, SW18	£21,864
Perfect Loft, London, SW18	£21,944
London Design Collaborative, Greater London, SW18	£21,944
A to Z Painters & Decorators, Wimbledon, SW19	£21,856

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Flat roof extension cost in SW18

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Flat roof extension cost in SW18

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