Cost to build a flat roof extension in HA4

Flat roof extension cost in HA4

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 HA4?

A flat roof extension ranges from the cheapest of £21,856 (SL9 Building Services based in HA4) to the dearest of £21,952 (Harrow Roofing and Building Limited based in HA5), 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 HA4 by posting a job with HaMuch. We'll send it to extension builders in HA4.

Estimates for flat roof extension near HA4

How much does a flat roof extension cost?
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Factors affecting the cost of flat roof extensions
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	Job	Estimate
	Underpinning a house	£17,398
	Build a two storey extension	£87,846
	Build a timber frame extension	£25,898
	Install a swimming pool	£80,898
	Cost to build a single storey extension	£52,952
	Cost to build a side return extension	£40,348
	Install an RSJ	£2,098
	Build an outbuilding	£9,898
	Build a mansard loft conversion	£51,898
	Cost of a loft conversion	£32,790
	Build a kitchen extension	£41,898
	Build a hip to gable loft conversion	£41,898
	Build a granny annexe	£86,898
	Build a garden office	£9,898
	Convert a garage	£15,898
	Build a new garage	£18,398
	Build a flat roof extension	£21,898
	Build a dormer loft conversion	£41,898
	Lay a concrete foundation	£6,148
	Convert a bungalow loft	£28,898
	Basement conversion cost	£36,348

Business name	Flat roof extension cost
ALG Renovations, Middlesex, HA4	£21,944
WILLIAM JAMES CONSTRUCTION, Ruislip, HA4	£21,864
C T Edwards, Ruislip, HA4	£21,888
Buckleys Building Services, Ruislip, HA4	£21,888
Floyd Andrews Building Service, Ruislip, HA4	£21,864
MAX CONSTRUCTION LTD, Ruislip, HA4	£21,864
SL9 Building Services, Unit 111 Rye House 161 High Street, Ruislip, London, Greater London, HA4	£21,856
J B N BUILDING SERVICES LIMIT, Ruislip, HA4	£21,864
Oldfield Construction, London, Greater London, Ha4	£21,856
Cornhill Construction Ltd, Ruislip, HA4	£21,888
Adica Limited, london, HA4	£21,944
Harrow Roofing and Building Limited, Middlesex, HA5	£21,952
Robin Services Ltd, Ruislip, Greater London, HA4	£21,856
The Property Planner, Greater London, HA4	£21,952
Platinum Star Constructions Ltd, Greater London, HA4	£21,952
Domo interiors Ltd, Greater London, HA2	£21,944
none, Lancashire, HA5	£21,944
BP Keating, Uxbridge, UB10	£21,864
DSJ UK CONSTRUCTION LTD, LONDON, HA4	£21,952
DSJ UK CONSTRUCTION LTD, 83A Wingfield Way, Ruislip, LONDON, HA4	£21,856
SS Building Services, Rayners Lane, HA2	£21,888
DeHavilland Design & Build Limited, Middlesex, Greater London, HA4	£21,864
DeHavilland Design & Build Limited, Greater London, HA4	£21,952
RMB Building and Development Ltd, 1 Egerton Close, Pinner, Middlesex, HA5	£21,856
Mario Prajar Building Services, Rayners Lane, HA2	£21,888

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Flat roof extension cost in HA4

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Flat roof extension cost in HA4

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