Cost to build a mansard loft conversion in SW1

Build a mansard loft conversion in SW1 from £50,160

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.

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Mansard loft conversion cost in SW1
Build a Mansard loft conversion cost in SW1
Estimates for common extension builder jobs in SW1;

Mansard loft conversion cost in SW1

Mansard loft conversions range from the cheapest installation of £50,160 (London Design And Build based in SW1A) to the dearest of around £51,944 (ALT CONSTRUCTION based in SW1W).

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 SW1 by posting a job with HaMuch and we'll send it to extension builders in SW1.

Estimates for build a mansard loft conversion near SW1

Estimates for common extension builder jobs in SW1;

Rates for other SW1 trades

Build a Mansard loft conversion cost in SW1

Estimate Build a Mansard loft conversion cost in SW1 based on hourly/daily rate (excluding VAT or callout charges)
Business name	Build a Mansard loft conversion cost
A to Z Builders Ltd, Houses of Parliament, SW1P	£51,880
F & F Building Services, Houses of Parliament, SW1P	£51,880
London Design And Build , Roehampton, SW1A	£50,160
London Projects Ltd, 11 Carteret Street, London, Greater London, SW1H	£51,848
Luxury Movement, London, Greater London, SW1V	£51,840
Cliden Construction (London), London, Greater London, SW1V	£51,840
Future Homes Design and Build, 4 Old Park Lane, Mayfair, London, W1K	£51,848
ALT CONSTRUCTION, Greater London, SW1W	£51,944
The Maybria Group, Mayfair, Greater London, W1J	£51,848
Property Refurbishment London, 21 Ellis Street, Sloane Square, London, Greater London, SW1X	£51,840
Mayfair Design, Greater London, W1J	£51,944
Sloane Ave Renovations, 130 Sloane Street, London, Greater London, SW1X	£51,840
Knightsbridge Design, Greater London, SW1X	£51,944
Autas Developments, London, SW1W	£51,944
Luxe Refurbs, 16 Berkeley Street, London, Greater London, W1J	£51,840
We Love Build - Three Arches, London, Greater London, W1J	£51,840
We Love Build, Greater London, W1J	£51,944
Elv8 Interiors, Greater London, W1B	£51,944
Adamko Dry Lining London, Greater London, WC2N	£51,944
Hearne House, London, Greater London, SW3	£51,840
Cobalt Interiors, London, Greater London, SW7	£51,944
Pillar Contractors Ltd, 49 Grosvenor Street, Mayfair, London, Greater London, W1K	£51,840
Clarisford, London, Greater London, SW3	£51,840
Clarisford, Greater London, SW3	£51,944
Big Mamma, Greater London, W1F	£51,944

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	Job	Estimate
	Cost to underpin a house	£17,319
	Build a two storey extension	£87,728
	Cost to build a timber frame extension	£25,819
	Cost to build a swimming pool	£80,819
	Cost to build a single storey extension	£51,371
	Cost to build a side return extension	£39,459
	Cost to Install an RSJ	£2,019
	Build an outbuilding	£9,819
	Cost to build a mansard loft conversion	£51,819
	Cost of a loft conversion	£32,049
	Cost to build a kitchen extension	£41,819
	Build a hip to gable loft conversion	£41,819
	Build a granny annexe	£86,819
	Build a garden office	£9,819
	Cost of a garage conversion	£15,819
	Build a new garage	£18,319
	Cost to build a flat roof extension	£21,819
	Cost to build a dormer loft conversion	£41,819
	Lay a concrete foundation	£6,069
	Cost of a bungalow loft conversion	£28,819
	Basement conversion cost	£35,459