Cost to build a flat roof extension in Greenwich

Flat roof extension cost in Greenwich

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 Greenwich?

A flat roof extension ranges from the cheapest of £21,600 (Total Home Refurbishments Ltd based in SE13) to the dearest of £22,000 (Mr S J Reece based in SE7), 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 Greenwich by posting a job with HaMuch. We'll send it to extension builders in Greenwich.

Estimates for flat roof extension near Greenwich

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?
How long does a flat roof extension take?
Do you need planning permission for a flat roof extension?
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	£17,388
	Build a two storey extension	£87,832
	Build a timber frame extension	£25,888
	Install a swimming pool	£80,888
	Cost to build a single storey extension	£52,754
	Cost to build a side return extension	£40,236
	Install an RSJ	£2,088
	Build an outbuilding	£9,888
	Build a mansard loft conversion	£51,888
	Cost of a loft conversion	£32,697
	Build a kitchen extension	£41,888
	Build a hip to gable loft conversion	£41,888
	Build a granny annexe	£86,888
	Build a garden office	£9,888
	Convert a garage	£15,888
	Build a new garage	£18,388
	Build a flat roof extension	£21,888
	Build a dormer loft conversion	£41,888
	Lay a concrete foundation	£6,138
	Convert a bungalow loft	£28,888
	Basement conversion cost	£36,236

Business name	Flat roof extension cost
Storeyboard, Greater London, SE10	£21,944
Storeyboard, London, Greater London, SE10	£21,848
Prestige Roofing Limited, 70 Colomb Street, Greenwich, London, SE10	£21,896
Trafalgar Building Company Limited, Greenwich, SE10	£21,864
D Postill Builders Ltd, 78 Combe Avenue, London, Greater London, SE3	£21,840
AZC BUILDING SERVICES, Greenwich, SE10	£21,864
Island design & Construction Ltd, Greater London, E14	£21,944
Total Home Refurbishments Ltd, London, SE13	£21,600
Demiri Builder Ltd, London, SE13	£21,944
Dule Vida Property Design Ltd, Greater London, SE13	£21,944
CG Design and Build LTD., Greater London, e14	£21,944
CG Design and Build LTD., London Arena, Greater London, e14	£21,848
TP Building & Development Services Ltd, London, Greater London, SE13	£21,848
JR Renovations, Greater London, SE7	£21,944
Mr S J Reece, London, SE7	£22,000
ALFA Building Solutions Ltd, London, Greater London, E14	£21,848
ALFA Building Solutions Ltd, Greater London, E14	£21,944
blitbolt ltd, Greater London, SE4	£21,944
blitbolt ltd, london, Greater London, SE4	£21,848
Your Builder Hero, London, E14	£21,944
AADO SERVICES LTD, Flat 2, 33 Campshill Road, London, Greater London, SE13	£21,848
Dumrea Building Construction Ltd, London, SE14	£21,888
WiseContract, Studio 33, Unit 10, elizabeth Industrial Estate, Juno Way, London, Greater London, se14	£21,848
DWL Construction Ltd, London, SE14	£21,944
ROOSE CONSTRUCTION LTD, Rotherhithe, SE16	£21,864

Extend your Greenwich with an extension

Flat roof extension cost in Greenwich

Estimates for common extension builder jobs in Greenwich;

Rates for other Greenwich trades

Flat roof extension cost in Greenwich

Get extension builder rates instantly