Cost to build a flat roof extension in SE4

Flat roof extension cost in SE4

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 SE4?

A flat roof extension ranges from the cheapest of £21,600 (Total Home Refurbishments Ltd based in SE13) to the dearest of £21,944 (Blitbolt ltd based in SE4), 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 SE4 by posting a job with HaMuch. We'll send it to extension builders in SE4.

Estimates for flat roof extension near SE4

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	£17,376
	Build a two storey extension	£87,815
	Build a timber frame extension	£25,876
	Install a swimming pool	£80,876
	Cost to build a single storey extension	£52,530
	Cost to build a side return extension	£40,110
	Install an RSJ	£2,076
	Build an outbuilding	£9,876
	Build a mansard loft conversion	£51,876
	Cost of a loft conversion	£32,592
	Build a kitchen extension	£41,876
	Build a hip to gable loft conversion	£41,876
	Build a granny annexe	£86,876
	Build a garden office	£9,876
	Convert a garage	£15,876
	Build a new garage	£18,376
	Build a flat roof extension	£21,876
	Build a dormer loft conversion	£41,876
	Lay a concrete foundation	£6,126
	Convert a bungalow loft	£28,876
	Basement conversion cost	£36,110

Business name	Flat roof extension cost
South East Builders, London, SE4	£21,864
blitbolt ltd, Greater London, SE4	£21,944
blitbolt ltd, london, Greater London, SE4	£21,848
Justin Bailey, Greater London, SE4	£21,944
AADO SERVICES LTD, Flat 2, 33 Campshill Road, London, Greater London, SE13	£21,848
1M Construction Ltd, Peckham, SE15	£21,864
Demiri Builder Ltd, London, SE13	£21,944
RM Building (London) Ltd, Nr Forest Hill, SE23	£21,864
Dule Vida Property Design Ltd, Greater London, SE13	£21,944
AZC BUILDING SERVICES, Greenwich, SE10	£21,864
Global Business BoxLttd, Greater London, SE15	£21,944
CHRIS BALL & SON ROOFING LTD, Forest Hill, SE23	£21,856
Total Home Refurbishments Ltd, London, SE13	£21,600
DWL Construction Ltd, London, SE14	£21,944
Baseline Build & Renovate, London, Greater London, SE15	£21,848
Dumrea Building Construction Ltd, London, SE14	£21,888
TP Building & Development Services Ltd, London, Greater London, SE13	£21,848
JBS BUILDERS, Lewisham, SE13	£21,864
STOYANOV CONSTRUCTION LTD, Forest Hill, SE23	£21,864
Five Sextillion, London, SE22	£21,848
WiseContract, Studio 33, Unit 10, elizabeth Industrial Estate, Juno Way, London, Greater London, se14	£21,848
S W BUILDPROVEMENT, Greater London, SE6	£21,944
Construction Surety, Greater London, SE13	£21,944
The Perfectionist, East Dulwich, SE22	£21,888
S G Painting Contractor Ltd, Catford, SE6	£21,856

Extend your SE4 with an extension

Flat roof extension cost in SE4

Estimates for common extension builder jobs in SE4;

Rates for other SE4 trades

Flat roof extension cost in SE4

Get extension builder rates instantly