Build a mansard loft conversion in Welwyn from £51,200

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 Welwyn

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 £51,200 (Complex Construction based in AL7) to the dearest of around £51,992 (Red Swan Construction based in SG2).

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

Estimates for build a mansard loft conversion near Welwyn

Estimates for common extension builder jobs in Welwyn;

JobEstimate
Cost to underpin a house£17,342
Build a two storey extension£87,763
Cost to build a timber frame extension£25,842
Cost to build a swimming pool£80,842
Cost to build a single storey extension£51,845
Cost to build a side return extension£39,725
Cost to Install an RSJ£2,042
Build an outbuilding£9,842
Cost to build a mansard loft conversion£51,842
Cost of a loft conversion£32,271
Cost to build a kitchen extension£41,842
Build a hip to gable loft conversion£41,842
Build a granny annexe£86,842
Build a garden office£9,842
Cost of a garage conversion£15,842
Build a new garage£18,342
Cost to build a flat roof extension£21,842
Cost to build a dormer loft conversion£41,842
Lay a concrete foundation£6,092
Cost of a bungalow loft conversion£28,842
Basement conversion cost£35,725
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Build a Mansard loft conversion cost in Welwyn
Estimate Build a Mansard loft conversion cost in Welwyn based on hourly/daily rate (excluding VAT or callout charges)
Business name Build a Mansard loft conversion cost
Laurdan Building LTD, Welwyn, AL6 £51,976
MA Gower, Welwyn, AL6 £51,600
Interior Installations, Welwyn, AL6 £51,888
Complex Construction, Welwyn Garden City, AL7 £51,200
J&R Property, Hertfordshire, AL7 £51,968
Ross Taylor Homes, Unit 18 Mardleybury Farm, Mardleybury Road, Datchworth, Hertfordshire, SG3 £51,832
PRIMEEXPERT, Hertfordshire, AL7 £51,968
Herts Premier Builders, Hertfordshire, AL7 £51,968
LBH Building & Property Services, Welwyn Garden City, Hertfordshire, AL7 £51,840
STYLE BUILDING SERVICES LTD, Welwyn Garden City, AL7 £51,888
Buildstar, Welwyn garden city, AL7 £51,600
Lemsford Building, Herefordshire, AL8 £51,968
NJG BUILDING SOLUTIONS LTD, Hertfordshire, AL7 £51,968
J J Roofing & Gutter Repairs, Hatfield, AL9 £51,864
J B R Contracts, 38 Norwood Close, Hertford, Hertfordshir, SG14 £51,816
Hertfordshire Design, Hertfordshire, AL10 £51,952
Red Swan Construction, Hertfordshire, SG2 £51,992
Grain Property, Hertfordshire, AL4 £51,960
A S G Developments - Herts LTD , Hatfield, AL10 £51,600
Oakridge Construction Limited, Hertford, SG14 £51,872
GB Build, 33 Walnut Tree Close, Aston End, Poplar, Stevenage, Hertfordshire, SG2 £51,840
VALLEYCREST CONSTRUCTION LTD, Hatfield, AL10 £51,880
Herts Loft Ltd, Hertford, SG14 £51,888
Harris Building Solutions Limited, Stevenage, SG1 £51,848
A1 Home Care Building Maintenance, Hatfield, AL10 £51,880

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Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Build A Mansard Loft Conversion near Welwyn Garden City£36£229
Build A Mansard Loft Conversion near Hertford£39£247
Build A Mansard Loft Conversion near Hatfield£53£244
Build A Mansard Loft Conversion near Stevenage£37£239
Build A Mansard Loft Conversion near Harpenden£70£264
Build A Mansard Loft Conversion near Hitchin£37£238
Build A Mansard Loft Conversion near East Hertfordshire£37£241
Build A Mansard Loft Conversion near Ware£40£252
Build A Mansard Loft Conversion near St Albans£52£246
Build A Mansard Loft Conversion near North Hertfordshire£37£239