Cost to build a flat roof extension in Southwark

Flat roof extension cost in Southwark

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 Southwark?

A flat roof extension ranges from the cheapest of £21,848 (Space Design Construction Services Ltd based in SE1) to the dearest of £21,944 (Stanrock Building Services Ltd based in se1), 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 Southwark by posting a job with HaMuch. We'll send it to extension builders in Southwark.

Estimates for flat roof extension near Southwark

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	£17,387
	Build a two storey extension	£87,831
	Build a timber frame extension	£25,887
	Install a swimming pool	£80,887
	Cost to build a single storey extension	£52,747
	Cost to build a side return extension	£40,233
	Install an RSJ	£2,087
	Build an outbuilding	£9,887
	Build a mansard loft conversion	£51,887
	Cost of a loft conversion	£32,694
	Build a kitchen extension	£41,887
	Build a hip to gable loft conversion	£41,887
	Build a granny annexe	£86,887
	Build a garden office	£9,887
	Convert a garage	£15,887
	Build a new garage	£18,387
	Build a flat roof extension	£21,887
	Build a dormer loft conversion	£41,887
	Lay a concrete foundation	£6,137
	Convert a bungalow loft	£28,887
	Basement conversion cost	£36,233

Business name	Flat roof extension cost
Space Design Construction Services Ltd, London, Greater London, SE1	£21,848
Stanrock Building Services Ltd, Greater London, se1	£21,944
Stanrock Building Services Ltd, Unit 3b Plantain Place, London, Greater London, se1	£21,848
Kia Designs, Greater London, SE1	£21,944
GILL BUILDING CONTRACTORS, Bermondsey, SE1	£21,864
Propia Limited, The Clarence Centre, 6 St George's Circus, London, Greater London, SE1	£21,848
Volute London, London, Greater London, EC4N	£21,848
SE1 Property Care Ltd., Greater London, SE1	£21,944
Altana Building Co.Ltd, Bermondsey, SE1	£21,888
Infinite CM, Greater London, SE1	£21,936
D & S CONSTRUCTION LTD, Bermondsey, SE1	£21,864
GenUp Digital, East Dunbartonshire, EC3M	£21,944
AGRI CONSTRUCTION, Bermondsey, SE1	£21,856
Omniform, Greater London, EC3V	£21,856
AAA Design Decorators, Elephant & Castle, SE17	£21,880
Flow Property Services, London, Greater London, EC4M	£21,848
London Roof Gardens, 30 The Leadenhall Building, 122 Leadenhall Street, London, Greater London, EC3V	£21,944
SDL PKB, 107 - 111 Fleet street - London -, London, Ec4a	£21,848
evolve property solutions, Unit 143, 155 Minories, London, Greater London, EC3N	£21,856
SCANDIIN, International House 24 Holborn Viaduct, London, Greater London, EC1A	£21,848
Elite Building, Greater London, WC2A	£21,944
Elite Building, 7 Bell Yard, London, Greater London, WC2A	£21,848
Renovation work service, London, E1W	£21,944
Aylaa Exclusive, 9 Newbury Street, london, Greater London, EC1A	£21,848
Londoner Building Ltd., Greater London, EC1A	£21,944

Extend your Southwark with an extension

Flat roof extension cost in Southwark

Estimates for common extension builder jobs in Southwark;

Rates for other Southwark trades

Flat roof extension cost in Southwark

Get extension builder rates instantly