Cost to build a flat roof extension in Muswell Hill

Flat roof extension cost in Muswell Hill

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 Muswell Hill?

A flat roof extension ranges from the cheapest of £21,200 (Bellator Construction Ltd based in N11) to the dearest of £21,944 (PLAN C - Design. Build. Create based in N10), 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 Muswell Hill by posting a job with HaMuch. We'll send it to extension builders in Muswell Hill.

Estimates for flat roof extension near Muswell Hill

How much does a flat roof extension cost?
Flat roof extension cost per m2
Factors affecting the cost of flat roof extensions
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	Job	Estimate
	Underpinning a house	£17,313
	Build a two storey extension	£87,719
	Build a timber frame extension	£25,813
	Install a swimming pool	£80,813
	Cost to build a single storey extension	£51,256
	Cost to build a side return extension	£39,394
	Install an RSJ	£2,013
	Build an outbuilding	£9,813
	Build a mansard loft conversion	£51,813
	Cost of a loft conversion	£31,995
	Build a kitchen extension	£41,813
	Build a hip to gable loft conversion	£41,813
	Build a granny annexe	£86,813
	Build a garden office	£9,813
	Convert a garage	£15,813
	Build a new garage	£18,313
	Build a flat roof extension	£21,813
	Build a dormer loft conversion	£41,813
	Lay a concrete foundation	£6,063
	Convert a bungalow loft	£28,813
	Basement conversion cost	£35,394

Business name	Flat roof extension cost
PLAN C - Design. Build. Create, 500 Muswell Hill Broadway, London, Greater London, N10	£21,848
PLAN C - Design. Build. Create, Greater London, N10	£21,944
N10 Building Contractors Ltd, Muswell Hill, N10	£21,840
Ally Electrical Services Ltd, Lonsto House, Princes Lane, London, Grea, N10	£21,944
N10 Tradespeople, Greater London, N10	£21,944
CM Build, Greater London, N10	£21,944
Gardens Dwarfs Home & Garden Service, Greater London, N10	£21,944
Simalex London, London, N10	£21,360
Galaia Limited, London, Greater London, N10	£21,848
Arundell Associates, London, N10	£21,600
SJ Expert Building Services, Muswell Hill, N10	£21,888
HAADAM Ltd., Greater London, N10	£21,848
Urban Design Build, 84 George Crescent, London, Greater London, N10	£21,848
Aqua Tierra Sol, Greater London, N2	£21,944
Portico design and build ltd, 9 barrington road, London, Greater London, N8	£21,848
Portico design and build ltd, Greater London, N8	£21,944
in the city decorators & design, London Bridge, N2	£21,944
Emperor.deco, London , N8	£21,888
BROARDWAY BUILDING SERVICES, Hornsey, N8	£21,864
Onyx Iv, London, N11	£21,280
Builders Are Us, London, N2	£21,944
Bellator Construction Ltd, London, N11	£21,200
EEA Building Services, Greater London, N11	£21,944
Elmfield Property Services, Wood Green, N22	£21,856
A K Decoration & Building Serv, Wood Green, N22	£21,864

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Flat roof extension cost in Muswell Hill

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Flat roof extension cost in Muswell Hill

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