Building services in Chalfont Saint Peter
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 Chalfont Saint Peter
| Project | Guide range (inc VAT) |
|---|---|
| Double-storey extensions | £1,850–£2,800 per m² of floor area (both floors) |
| Hip-to-gable loft conversions | £61,500–£87,500 for a hip-to-gable with rear dormer |
| Garage conversions | £20,000–£33,500 for a single integral garage |
| House renovations | £1,000–£2,000 per m² for a medium to full renovation |
| Structural alterations and knock-throughs | £5,000–£10,500 for a typical knock-through with steel beam |
| Porches | £7,250–£18,000 from a 3 m² porch to a small front extension |
That range is adjusted for the South East, where domestic building work typically costs around 12% above the national average.
Planning permission in Chalfont Saint Peter
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 Chalfont Saint Peter
Commuter towns across the South East have many 1930s and post-war semis that suit rear extensions and hip-to-gable loft conversions.
We work across Chalfont Saint Peter and neighbouring areas such as Gerrards Cross, Rickmansworth and Amersham. Postcodes we cover in Chalfont Saint Peter include HP9 and SL9. Chalfont Saint Peter has a population of around 20,000.
How it works
- 01
Visit and measured survey
A free visit to understand the project, check access and take measurements.
- 02
Drawings and written quote
We prepare the design and give you a written, itemised quote with inclusions and exclusions.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Build and handover
Work follows the agreed programme, with inspections along the way and a completion certificate at the end.
Questions from homeowners in Chalfont Saint Peter
Is the home visit free?
Yes. The first visit to discuss your project and measure up for a quote is free, with no obligation.
Do I need planning permission for an extension in Chalfont Saint Peter?
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.
How much does a loft conversion cost in Chalfont Saint Peter?
A rear dormer loft conversion in Chalfont Saint Peter typically costs £54,000–£76,000 for a typical rear dormer with en-suite, including VAT.
Do you work in Chalfont Saint Peter?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Chalfont Saint Peter, including postcodes HP9 and SL9.
How much does an extension cost in Chalfont Saint Peter?
A single-storey extension in Chalfont Saint Peter typically costs £2,200–£3,250 per m² of floor area, and a double-storey extension £1,850–£2,800 per m² of floor area (both floors), including VAT.