Cost to build a mansard loft conversion in SM3

Mansard loft conversion cost in SM3

Mansard loft conversions are ideal if you want to maximise the space in your home. Extending your roof out into a flat roof with an almost vertical wall, they almost always require planning permission but can add significant value to your home.

Mansard loft conversions range from the cheapest installation of £51,824 (Charles Byron Ltd based in SM3) to the dearest of around £51,936 (Cavendish Building and Construction Ltd based in SM3).

While these estimates give you a good idea how much you'll pay for a mansard loft conversion, the only way to get an accurate price is to get real quotes from real builders.

Get quotes to install a mansard loft conversion in SM3 by posting a job with HaMuch and we'll send it to extension builders in SM3.

Estimates for mansard loft conversion near SM3

How much does a mansard loft conversion cost?
What is a mansard loft conversion?
Factors that affect the cost of a mansard loft conversion
Additional costs to consider with a mansard loft conversion
How long does a mansard loft conversion take?
Do I need planning permission for a mansard roof?
What is the difference between a dormer and a mansard?

	Job	Estimate
	Underpinning a house	£17,374
	Build a two storey extension	£87,811
	Build a timber frame extension	£25,874
	Install a swimming pool	£80,874
	Cost to build a single storey extension	£52,485
	Cost to build a side return extension	£40,085
	Install an RSJ	£2,074
	Build an outbuilding	£9,874
	Build a mansard loft conversion	£51,874
	Cost of a loft conversion	£32,571
	Build a kitchen extension	£41,874
	Build a hip to gable loft conversion	£41,874
	Build a granny annexe	£86,874
	Build a garden office	£9,874
	Convert a garage	£15,874
	Build a new garage	£18,374
	Build a flat roof extension	£21,874
	Build a dormer loft conversion	£41,874
	Lay a concrete foundation	£6,124
	Convert a bungalow loft	£28,874
	Basement conversion cost	£36,085

Business name	Mansard loft conversion cost
DP BUILDERS UK LTD, Sutton, SM1	£51,856
KAS CONSTRUCTION (SW) LLP, Sutton, SM1	£51,856
Charles Byron Ltd, 127 Church Hill Road, Cheam, Surrey, London, Surrey, SM3	£51,824
Happy Building, Sutton, Surrey, SM1	£51,832
Lee Builders & Decorators, Sutton, SM1	£51,880
Cavendish Building and Construction Ltd, Sutton, SM3	£51,936
GDW Construction, North Cheam, SM3	£51,880
FALCON BUILDERS, North Cheam, SM3	£51,856
KADEK BUILDING SERVICES, Sutton, SM1	£51,856
CLH BUILDING SERVICES, Sutton, SM1	£51,856
New Smart Living Ltd, Surrey, SM1	£51,936
TopTrowels Brickwork & Paving, Sutton, Surrey, Sm1	£51,840
S AND M CONSTRUCTION, Sutton, SM1	£51,856
RM Sanwell Roofing, Cheam, Sutton, SM3	£51,856
Bradley Building Services Ltd, Surrey, SM1	£51,936
Home Shape Ltd, Surrey, SM1	£51,936
Hilton building contractors ltd, cheam, London, Sm3	£51,832
AT Line Construction Ltd, UK, SM1	£51,936
Magna Building Services Ltd, Sutton, SM2	£51,848
JG BUILDING SERVICES, Worcester Park, KT4	£51,856
Amazing Space Design and Build Ltd., Greater London, SM2	£51,936
Dominant Construction, London, Londonderry, SM1	£51,832
Smarticagroup, Surrey, sm2	£51,936
lucyb, London, Surrey, SM2	£51,832
SEDGWICK BUILDING SERVICES LLP, Morden, SM4	£51,856

Build a mansard loft conversion in SM3 from £51,824

Mansard loft conversion cost in SM3

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Mansard loft conversion cost in SM3

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