Cost to build a flat roof extension in NW9

Flat roof extension cost in NW9

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 NW9?

A flat roof extension ranges from the cheapest of £21,600 (HONEST CONTRUCTION LIMITED based in NW9) to the dearest of £22,240 (K&T Building services LTD based in NW9), 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 NW9 by posting a job with HaMuch. We'll send it to extension builders in NW9.

Estimates for flat roof extension near NW9

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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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	£17,380
	Build a two storey extension	£87,820
	Build a timber frame extension	£25,880
	Install a swimming pool	£80,880
	Cost to build a single storey extension	£52,606
	Cost to build a side return extension	£40,154
	Install an RSJ	£2,080
	Build an outbuilding	£9,880
	Build a mansard loft conversion	£51,880
	Cost of a loft conversion	£32,628
	Build a kitchen extension	£41,880
	Build a hip to gable loft conversion	£41,880
	Build a granny annexe	£86,880
	Build a garden office	£9,880
	Convert a garage	£15,880
	Build a new garage	£18,380
	Build a flat roof extension	£21,880
	Build a dormer loft conversion	£41,880
	Lay a concrete foundation	£6,130
	Convert a bungalow loft	£28,880
	Basement conversion cost	£36,154

Business name	Flat roof extension cost
R.A.S. Construction And Design Ltd, 8 MEADOW WAY, LONDON, LONDON, Greater London, NW9	£21,848
BKB Building Contractors, Colindale, NW9	£21,888
HARLEY BUILDING SERVICES LTD, Colindale, NW9	£21,864
K&T Building services LTD, Colindale, NW9	£22,240
Space Dimensioned Ltd., Hyde House, The Hyde, London, Greater London, NW9	£21,848
Space Dimensioned Ltd., Greater London, NW9	£21,944
Luxor Interiors Ltd, London, NW9	£21,944
Hallpark Construction, Unit B2 Connaught Business Centre, Hyde Estate Rd, London, Greater London, NW9	£21,848
InConstruction Services Ltd, London, Greater London, NW9	£21,848
Bathrooms and kitchens specialist, West Midlands, NW9	£21,944
Otters Group Ltd, London, NW9	£21,848
Attymass Brickwork Limited, Greater London, NW9	£21,944
Carl Construction Limited, London, NW9	£21,944
HONEST CONTRUCTION LIMITED, London, NW9	£21,600
AAA Team Building Services Ltd, London, NW9	£21,848
J & C BUILDING CONTRACTORS LTD, Colindale, NW9	£21,864
SL Building Constructions, Greater London, NW9	£21,944
HR Building Solutions Ltd, Greater London, NW9	£21,944
Arhiterra Design and Build Ltd, Greater London, NW9	£21,944
BHUVA CONSTRUCTION (UK) LTD, Colindale, NW9	£21,864
Bhuva Construction, 70 Tintern Avenue, London, Greater London, NW9	£21,848
D Bradshaw Building Renovation, Colindale, NW9	£21,864
A & S Construction Ltd, LONDON, NW9	£21,600
INIK Construction Ltd, London, Greater London, NW9	£21,848
MS Maintenance, Colindale, NW9	£21,888

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Flat roof extension cost in NW9

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Flat roof extension cost in NW9

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