Building services in Portishead
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 Portishead
| Project | Guide range (inc VAT) |
|---|---|
| Single-storey extensions | £2,000–£2,950 per m² of floor area |
| Double-storey extensions | £1,700–£2,550 per m² of floor area (both floors) |
| Hip-to-gable loft conversions | £56,000–£79,500 for a hip-to-gable with rear dormer |
| Structural alterations and knock-throughs | £4,500–£9,750 for a typical knock-through with steel beam |
| Porches | £6,750–£16,500 from a 3 m² porch to a small front extension |
| Orangeries | £2,450–£3,450 per m² of floor area |
Building costs in the South West are close to the UK average, so the figures for Portishead are close to our national guide.
Planning permission in Portishead
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 Portishead
The South West mixes stone and render cottages with post-war and newer estates, and local materials matter more here when matching an extension.
We work across Portishead and neighbouring areas such as Nailsea, Clevedon and Kingswood. Postcodes we cover in Portishead include BS20. Portishead has a population of around 26,000.
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
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 Portishead
Do you work in Portishead?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Portishead, including postcodes BS20.
How much does a loft conversion cost in Portishead?
A rear dormer loft conversion in Portishead typically costs £49,000–£69,500 for a typical rear dormer with en-suite, including VAT.
How much does an extension cost in Portishead?
A single-storey extension in Portishead typically costs £2,000–£2,950 per m² of floor area, and a double-storey extension £1,700–£2,550 per m² of floor area (both floors), including VAT.
Do I need planning permission for an extension in Portishead?
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.