Building services in Forest Hill
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 Forest Hill
| Project | Guide range (inc VAT) |
|---|---|
| Single-storey extensions | £2,550–£3,750 per m² of floor area |
| Kitchen extensions | £2,900–£4,400 per m² including a mid-range kitchen |
| Dormer loft conversions | £62,500–£88,500 for a typical rear dormer with en-suite |
| Hip-to-gable loft conversions | £71,500–£101,500 for a hip-to-gable with rear dormer |
| House renovations | £1,150–£2,350 per m² for a medium to full renovation |
| Orangeries | £3,100–£4,400 per m² of floor area |
Building costs in London run about 30% above the UK average, and the figures for Forest Hill are adjusted to reflect that.
Planning permission in Forest Hill
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 Forest Hill
Victorian and Edwardian terraces dominate many London streets, which is why side return, wraparound and mansard projects are so common here.
Forest Hill sits in Greater London, about 6 miles south-east of central London. We cover the whole of Forest Hill, including postcodes SE23.
How it works
- 01
Survey and brief
We visit, discuss your ideas and budget, and survey the property or site at no cost.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Permissions sorted
Applications, building control and neighbour arrangements, all before the start date.
- 04
Construction and completion
We build, put right any snags and hand over the building control certificate.
Questions from homeowners in Forest Hill
How much does an extension cost in Forest Hill?
A single-storey extension in Forest Hill 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.
Do you work in Forest Hill?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Forest Hill, including postcodes SE23.
How much does a loft conversion cost in Forest Hill?
A rear dormer loft conversion in Forest Hill typically costs £62,500–£88,500 for a typical rear dormer with en-suite, including VAT.
Do I need planning permission for an extension in Forest Hill?
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.