Cost to build a flat roof extension in Botany Bay

Flat roof extension cost in Botany Bay

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 Botany Bay?

A flat roof extension ranges from the cheapest of £21,832 (Firtree Building Services Ltd based in EN1) to the dearest of £22,800 (Acme Lofts & Extensions based in EN2), 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 Botany Bay by posting a job with HaMuch. We'll send it to extension builders in Botany Bay.

Estimates for flat roof extension near Botany Bay

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	£17,423
	Build a two storey extension	£87,884
	Build a timber frame extension	£25,923
	Install a swimming pool	£80,923
	Cost to build a single storey extension	£53,458
	Cost to build a side return extension	£40,632
	Install an RSJ	£2,123
	Build an outbuilding	£9,923
	Build a mansard loft conversion	£51,923
	Cost of a loft conversion	£33,027
	Build a kitchen extension	£41,923
	Build a hip to gable loft conversion	£41,923
	Build a granny annexe	£86,923
	Build a garden office	£9,923
	Convert a garage	£15,923
	Build a new garage	£18,423
	Build a flat roof extension	£21,923
	Build a dormer loft conversion	£41,923
	Lay a concrete foundation	£6,173
	Convert a bungalow loft	£28,923
	Basement conversion cost	£36,632

Business name	Flat roof extension cost
The Orchid Group, 4 Chase Side, enfield, EN2	£21,848
A & R Design, 2A Chase Side Crescent, Enfield, Middles, EN2	£21,840
W-G LOFTS, Middlesex, EN2	£21,944
M & D Home Improvements, Enfield, EN1	£21,864
Bzone Builders, Botany Bay, EN2	£21,888
Firtree Building Services Ltd, 36 Fir Tree Walk, Enfield, London, EN1	£21,832
[email protected] , Enfield , En1	£21,888
SweepSmart, 8 Acacia Road, Enfield, Greater London, EN2	£21,840
AL Plumbing & Electrical, Enfield, EN1	£21,944
Tdb onsite, Enfield, EN1	£21,888
B&B London Construction Ltd, Enfield, EN1	£21,888
C. Jenkin Builders Limited, 39 The Spinney, Winchmore Hill, Enfield,, N21	£21,944
Drutu Building Services, Enfield, EN1	£21,856
MULBERRY CONSTRUCTION LTD, Winchmore Hill, N21	£21,864
Acme Lofts & Extensions, Middlesex, EN2	£22,800
Cityscape Projects Ltd, 4 Elm Park Road, London, N21	£21,840
S E H BUILDERS LTD, Winchmore Hill, N21	£21,864
DW Building, Ponders End, EN3	£21,880
Des Contract Ltd, Southgate, London, Greater London, N14	£21,848
United construction group, Hertfordshire, EN3	£21,944
NexLevel Contractors Ltd, Greater London, N9	£21,944
Arkley Refurbishments, Ponders End, EN3	£21,880
ALEX BUILDING & DECORATING, Ponders End, EN3	£21,864
EVS ARCHITECTURE & CONSTRUCTION LTD, London, N14	£21,944
ICB Building and Civil Engineering, Greater London, EN3	£21,936

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Flat roof extension cost in Botany Bay

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Flat roof extension cost in Botany Bay

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