Building projects we take on in Greater London
House extensions
- Single-storey extensions in Greater London
- Double-storey extensions in Greater London
- Side extensions in Greater London
- Side return extensions in Greater London
- Wraparound extensions in Greater London
- Kitchen extensions in Greater London
- Orangeries in Greater London
- Glazed and contemporary extensions in Greater London
- Porches in Greater London
Loft conversions
- Dormer loft conversions in Greater London
- Hip-to-gable loft conversions in Greater London
- Mansard loft conversions in Greater London
- Rooflight loft conversions in Greater London
- Bungalow loft conversions in Greater London
Garage, basement and barn conversions
- Garage conversions in Greater London
- Basement conversions in Greater London
- Garden annexes in Greater London
New build homes
Renovations and structural work
Design and approvals
Guide prices in Greater London
| Project | Guide range (inc VAT) |
|---|---|
| Single-storey extensions | £2,550–£3,750 per m² of floor area |
| Double-storey extensions | £2,150–£3,250 per m² of floor area (both floors) |
| Dormer loft conversions | £62,500–£88,500 for a typical rear dormer with en-suite |
| Garage conversions | £23,500–£39,000 for a single integral garage |
| House renovations | £1,150–£2,350 per m² for a medium to full renovation |
| New build homes | £2,600–£4,150 per m² of floor area (build cost) |
That range is adjusted for London, where domestic building work typically costs around 30% above the national average.
Planning and building control in Greater London
In England a single-storey rear extension is often permitted development: broadly up to 3 metres deep on a semi-detached or terraced house and 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary, and covering no more than half the garden. The larger home extension scheme allows up to 6 or 8 metres if you notify the council first and neighbours have a chance to comment. In conservation areas, National Parks and National Landscapes the larger home extension route, side extensions and cladding are not permitted development. Flats and houses whose rights have been removed need a planning application, and listed buildings need listed building consent.
In England a rear dormer is often permitted development if the extra roof volume is no more than 40 cubic metres on a terraced house or 50 on other houses, it does not face the road, sits no higher than the ridge and is set back from the eaves, with matching materials and obscure-glazed side windows. Balconies, front dormers and work in conservation areas need planning permission.
Building regulations approval comes from the council’s building control service or a registered building control approver. The work is inspected at key stages, such as foundations, drainage and insulation, and a completion certificate is issued at the end.
Building in Greater London
Victorian and Edwardian terraces dominate many London streets, which is why side return, wraparound and mansard projects are so common here.
Questions about building in Greater London
Do you cover all of Greater London?
Yes. We take on projects across Greater London, including Acton, Balham, Barking, Barnes and Barnet.
How much does an extension cost in Greater London?
A single-storey extension in Greater London typically costs £2,550–£3,750 per m² of floor area, including VAT.
Do I need planning permission in Greater London?
In England a single-storey rear extension is often permitted development: broadly up to 3 metres deep on a semi-detached or terraced house and 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary, and covering no more than half the garden. The larger home extension scheme allows up to 6 or 8 metres if you notify the council first and neighbours have a chance to comment. In conservation areas, National Parks and National Landscapes the larger home extension route, side extensions and cladding are not permitted development. Flats and houses whose rights have been removed need a planning application, and listed buildings need listed building consent.
Who approves building work in Greater London?
Building regulations approval comes from the council’s building control service or a registered building control approver. The work is inspected at key stages, such as foundations, drainage and insulation, and a completion certificate is issued at the end.