Cost to build a flat roof extension in Chislehurst

Flat roof extension cost in Chislehurst

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 Chislehurst?

A flat roof extension ranges from the cheapest of £20,080 (TDR Property Maintenance based in SE9) to the dearest of £22,000 (Silverland design & build based in BR1), 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 Chislehurst by posting a job with HaMuch. We'll send it to extension builders in Chislehurst.

Estimates for flat roof extension near Chislehurst

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
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What insulation do I need for a flat roof extension?

	Job	Estimate
	Underpinning a house	£17,295
	Build a two storey extension	£87,692
	Build a timber frame extension	£25,795
	Install a swimming pool	£80,795
	Cost to build a single storey extension	£50,891
	Cost to build a side return extension	£39,189
	Install an RSJ	£1,995
	Build an outbuilding	£9,795
	Build a mansard loft conversion	£51,795
	Cost of a loft conversion	£31,824
	Build a kitchen extension	£41,795
	Build a hip to gable loft conversion	£41,795
	Build a granny annexe	£86,795
	Build a garden office	£9,795
	Convert a garage	£15,795
	Build a new garage	£18,295
	Build a flat roof extension	£21,795
	Build a dormer loft conversion	£41,795
	Lay a concrete foundation	£6,045
	Convert a bungalow loft	£28,795
	Basement conversion cost	£35,189

Business name	Flat roof extension cost
May & Sons Building Solutions Limited, Chislehurst, BR7	£21,936
OBC Building and Construction, 1 Bromley lane, Chislehurst, Kent, BR7	£21,840
R&K EVANS BUILDERS, Chislehurst, BR7	£21,856
Synsera Homes, Suite 3, Langford House, 7-7a High Street, Chislehurst, Greater London, BR7	£21,840
Belmont Building Company Ltd, Chislehurst, BR7	£21,848
BELMONT BUILDING COMPANY LTD, Chislehurst, BR7	£21,848
Master Builders, Petts Wood, BR5	£21,872
SE One Builders Ltd, Kent, BR7	£21,936
Aumosa Ltd, Bromley, BR7	£21,880
P&A - Design and Build, London, Kent, BR5	£21,832
Precise Building Limited, Kent, BR5	£21,928
Ha property services, Kent, Br5	£21,928
Inspired Building Projects Limited, 12 Edgehill Road, Chislehurst, Kent, BR7	£21,824
Silverland design & build, Bromley, BR1	£22,000
TDR Property Maintenance , London, SE9	£20,080
PARAMOUNT CONSTRUCTION (UK), Eltham, SE9	£21,856
RIGHTBUILDUK, London, Kent, DA14	£21,840
Tage London, 277 Main Road, London, Greater London, DA14	£21,840
Aura Construction, 277 Main Road, Sidcup, Greater London, DA14	£21,840
Stone & Brick limited, Bromley, BR1	£21,760
R.F Construction & Landscaping, Bromley, BR1	£21,848
Cygnus Construction, Orpington, BR5	£21,808
Timbertech projects , Orpington , BR5	£21,856
Fairview Construction Team Ltd., Greater London, SE9	£21,936
Fairview Construction Team Ltd., 27 Castlecombe Road, London, Greater London, SE9	£21,832

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Flat roof extension cost in Chislehurst

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Flat roof extension cost in Chislehurst

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