Cost to build a mansard loft conversion in WD18

Build a mansard loft conversion in WD18 from £51,840

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 WD18
Build a Mansard loft conversion cost in WD18
Estimates for common extension builder jobs in WD18;

Mansard loft conversion cost in WD18

Mansard loft conversions range from the cheapest installation of £51,840 (Swan Windows & Son Limited based in WD3) to the dearest of around £54,000 (Design & Build Builders Ltd based in WD18).

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 WD18 by posting a job with HaMuch and we'll send it to extension builders in WD18.

Estimates for build a mansard loft conversion near WD18

Estimates for common extension builder jobs in WD18;

Rates for other WD18 trades

Build a Mansard loft conversion cost in WD18

Estimate Build a Mansard loft conversion cost in WD18 based on hourly/daily rate (excluding VAT or callout charges)
Business name	Build a Mansard loft conversion cost
Frame Brickwork, West Watford, WD18	£51,896
Design & Build Builders Ltd, Watford, WD18	£54,000
A&T Building, Watford, WD18	£51,888
Architectural Brickwork Services, Hertfordshire, WD19	£51,968
1st Choice Builders UK, West Watford, WD18	£51,896
Primrose Projects, WATFORD, Hertfordshire, WD17	£51,864
AV Home Improvements, Herts, WD19	£51,968
MAINCORE BUILDING SERVICES LTD, Rickmansworth, WD3	£51,888
Tonybuild, Watford, WD17	£51,896
D ROSE BUILDING SERVICES, Rickmansworth, WD3	£51,896
T N Roofing, Bushey Hall Drive, B, WD23	£51,888
S2M VENTURES LLP, West Lothian, HA6	£51,968
Progressive Design London, Watford, Hertfordshire, WD24	£51,856
Conversion Property and Electrical Services, Hertfordshire, WD24	£51,968
C S C BUILDINGS LTD, Oxhey, WD19	£51,888
Cannon Build Solutions, Hartsbourne House, Watford, Hertfordshire, WD19	£51,872
Project Squared Construction Ltd, Hertfordshire, ha6	£51,968
Ideal Place Construction Ltd, Watford, WD19	£52,000
Sharp Building Ltd, Watford, WD19	£51,896
Timeless Interiors, Hertfordshire, WD3	£51,968
Cube Design, Herefordshire, WD3	£51,968
Crown Building, Unit: 324-B, Wenta Centre, Colne Way, Watford, Hertfordshire, WD24	£51,864
Daniel London, London, Greater London, HA6	£51,872
Swan Windows & Son Limited, 88a High St, Rickmansworth, Hertfordshir, WD3	£51,840
Murati Building LTD, Garston, WD25	£51,904

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	Job	Estimate
	Cost to underpin a house	£17,495
	Build a two storey extension	£87,993
	Cost to build a timber frame extension	£25,995
	Cost to build a swimming pool	£80,995
	Cost to build a single storey extension	£54,904
	Cost to build a side return extension	£41,446
	Cost to Install an RSJ	£2,195
	Build an outbuilding	£9,995
	Cost to build a mansard loft conversion	£51,995
	Cost of a loft conversion	£33,705
	Cost to build a kitchen extension	£41,995
	Build a hip to gable loft conversion	£41,995
	Build a granny annexe	£86,995
	Build a garden office	£9,995
	Cost of a garage conversion	£15,995
	Build a new garage	£18,495
	Cost to build a flat roof extension	£21,995
	Cost to build a dormer loft conversion	£41,995
	Lay a concrete foundation	£6,245
	Cost of a bungalow loft conversion	£28,995
	Basement conversion cost	£37,446