Building services in Seaham
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 Seaham
| Project | Guide range (inc VAT) |
|---|---|
| Single-storey extensions | £1,750–£2,600 per m² of floor area |
| Kitchen extensions | £2,000–£3,050 per m² including a mid-range kitchen |
| Dormer loft conversions | £43,000–£61,000 for a typical rear dormer with en-suite |
| Hip-to-gable loft conversions | £49,500–£70,000 for a hip-to-gable with rear dormer |
| Porches | £5,750–£14,500 from a 3 m² porch to a small front extension |
| Orangeries | £2,150–£3,050 per m² of floor area |
Building costs in the North East run about 10% below the UK average, and the figures for Seaham are adjusted to reflect that.
Planning permission in Seaham
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 Seaham
Across the North East, colliery-era terraces and newer estates sit side by side, so the right project depends on the house type.
We work across Seaham and neighbouring areas such as Houghton-Le-Spring, Sunderland and Peterlee. Postcodes we cover in Seaham include SR7. Seaham has a population of around 22,000.
How it works
- 01
Free visit
We look at the property, talk through what you want and measure up. There is no charge and no obligation.
- 02
Design and fixed quote
Drawings, structural calculations and an itemised, fixed price for the agreed specification.
- 03
Approvals in place
We handle planning, building control and neighbour notices before work starts.
- 04
Build and sign-off
We run the build to a written programme and hand over the completion certificate.
Questions from homeowners in Seaham
How much does an extension cost in Seaham?
A single-storey extension in Seaham typically costs £1,750–£2,600 per m² of floor area, and a double-storey extension £1,500–£2,250 per m² of floor area (both floors), including VAT.
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 Seaham?
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.
Do you work in Seaham?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Seaham, including postcodes SR7.
How much does a loft conversion cost in Seaham?
A rear dormer loft conversion in Seaham typically costs £43,000–£61,000 for a typical rear dormer with en-suite, including VAT.