Seaham, County Durham
Terraced house rear extension in Seaham
Rear and side return extensions for terraces, with access through the house and two neighbours. We design, get the approvals for and build rear extensions for terraced houses in Seaham and the surrounding area, with one contract from the first survey to building control sign-off.
Seaham and its postcode districts SR7 are part of our County Durham coverage. On a Seaham terrace both neighbours usually need party wall notices or agreement, so we talk to them early.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a terraced house rear extension cost in Seaham?
For Seaham we work from the North East England rate: £1,840–£2,970 per square metre of new floor, including VAT, standard specification. North East prices are among the lowest in our range; former mining ground is the main foundation variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4.5 m deep (13.5 m²) | £25,000–£40,000 |
| 3 m wide × 6 m deep (18 m²) | £33,000–£53,500 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a terraced house rear extension in Seaham?
Here is how the rules in England apply to a terraced house rear extension in Seaham.
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part is within 2 metres of a boundary.
Because rear extensions often sit on or near the boundary, the Party Wall etc. Act 1996 usually applies in England. Notices go out one or two months before work depending on the type of work, and a surveyor's award is only needed if a neighbour does not consent.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in Seaham like to extend?
Terraces and semis are typical around Seaham. On terraces a single-storey rear extension across the back yard is usually the practical choice; semis often have room for more.
How a terraced house rear extension in Seaham comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Terraced house rear extensions near Seaham
Close by, we work in Ryhope, about 2.4 miles away, and Hetton-le-Hole, about 4.4 miles away.
- Terraced house rear extension in Ryhope
- Terraced house rear extension in Hetton-le-Hole
- Terraced house rear extension in Houghton-le-Spring
- Terraced house rear extension in Sunderland
- Terraced house rear extension in Peterlee
Other work in Seaham:
FAQ
Terraced house rear extension questions in Seaham
Do I need planning permission for a rear extension in Seaham?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.
Do you handle building control in Seaham?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
How do you keep the house clean?
Dust screens, floor protection and a single protected route through the house.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
What postcode areas do you cover around Seaham?
Including SR7, and the surrounding County Durham area.