From £51,848
We offer Concept Design ideas for you to see what your room, house, office space can look like.
From £52,064
RJB Construction and Joinery is a trusted extension builder serving customers in LS21 and the surrounding area. Contact us to today to get a compet...

Mansard loft conversions range from the cheapest installation of £51,848 (CB Concept Design based in LS20) to the dearest of around £52,064 (RJB Construction and Joinery based in LS20).
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 LS21 by posting a job with HaMuch and we'll send it to extension builders in LS21.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Mansard Loft Conversion near Shipley | £29 | £226 |
| Build A Mansard Loft Conversion near Pudsey | £30 | £226 |
| Build A Mansard Loft Conversion near Bingley | £30 | £228 |
| Build A Mansard Loft Conversion near Harrogate | £29 | £225 |
| Build A Mansard Loft Conversion near Bradford | £29 | £224 |
| Build A Mansard Loft Conversion near Chapeltown | £30 | £232 |
| Build A Mansard Loft Conversion near Leeds | £31 | £236 |
| Build A Mansard Loft Conversion near Keighley | £30 | £226 |
| Build A Mansard Loft Conversion near Beeston | £31 | £236 |
| Build A Mansard Loft Conversion near Morley | £31 | £239 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,456

Two storey extension - £87,934

Build a timber frame extension - £25,956

Build a swimming pool - £80,956

Single storey extension - £54,120

Side return extension - £41,005

Install an RSJ - £2,156

Outbuilding - £9,956

Build a Mansard loft conversion - £51,956

Loft conversion - £33,338

Build a kitchen extension - £41,956

Hip to gable loft conversion - £41,956

Granny annexe - £86,956

Garden office - £9,956

Convert a Garage - £15,956

Garage - £18,456

Build a flat roof extension - £21,956

Build a dormer loft conversion - £41,956

Concrete foundations - £6,206

Convert a bungalow loft - £28,956

Convert a basement - £37,005