Building services in Twickenham
House extensions
- Single-storey extensions
- Double-storey extensions
- Side extensions
- Side return extensions
- Wraparound extensions
- Kitchen extensions
- Orangeries
- Glazed and contemporary extensions
- Porches
Loft conversions
- Dormer loft conversions
- Hip-to-gable loft conversions
- Mansard loft conversions
- Rooflight loft conversions
- Bungalow loft conversions
Garage, basement and barn conversions
New build homes
Renovations and structural work
Design and approvals
Guide prices in Twickenham
| Project | Guide range (inc VAT) |
|---|---|
| Kitchen extensions | £2,900–£4,400 per m² including a mid-range kitchen |
| 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 |
| Structural alterations and knock-throughs | £5,750–£12,500 for a typical knock-through with steel beam |
| Porches | £8,500–£21,000 from a 3 m² porch to a small front extension |
| Orangeries | £3,100–£4,400 per m² of floor area |
That range is adjusted for London, where domestic building work typically costs around 30% above the national average.
Planning permission in Twickenham
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.
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.
About building in Twickenham
Space is at a premium in London, so homeowners often build out into the side return or up into the roof rather than move.
Our Twickenham coverage includes postcode districts TW1 and TW2, and we also work in nearby places such as Teddington, Richmond and Kingston upon Thames.
How it works
- 01
Visit and measured survey
A free visit to understand the project, check access and take measurements.
- 02
Design and fixed quote
Drawings, structural calculations and an itemised, fixed price for the agreed specification.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Build and sign-off
We run the build to a written programme and hand over the completion certificate.
Questions from homeowners in Twickenham
Do I need planning permission for an extension in Twickenham?
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.
Is the home visit free?
Yes. The first visit to discuss your project and measure up for a quote is free, with no obligation.
How much does an extension cost in Twickenham?
A single-storey extension in Twickenham typically costs £2,550–£3,750 per m² of floor area, and a double-storey extension £2,150–£3,250 per m² of floor area (both floors), including VAT.
How much does a loft conversion cost in Twickenham?
A rear dormer loft conversion in Twickenham typically costs £62,500–£88,500 for a typical rear dormer with en-suite, including VAT.
Do you work in Twickenham?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Twickenham, including postcodes TW1 and TW2.