What is a wraparound extension?
A wraparound extension combines a side return and a rear extension into one L-shaped addition. It gives the largest possible ground floor, often creating an open-plan kitchen, dining and living space across the whole width of the house.
How much does a wraparound extension cost in Sunderland?
In Sunderland, a wraparound extension typically costs £2,000–£2,900 per m² of floor area, including VAT at 20% (standard rate). For a typical 28 m² project that is roughly £56,000–£81,000. Prices across the North East are typically 10% below the UK average for this kind of work, which is reflected in the range for Sunderland. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| Smaller project (20 m²) | £40,000–£58,000 |
| Typical project (28 m²) | £56,000–£81,000 |
| Larger project (39 m²) | £78,000–£113,000 |
| Rate per m² | £2,000–£2,900 |
What moves the price most:
- Total footprint and the amount of glazing
- Access for materials on terraced streets
- Steelwork and propping of the existing house
- Drainage changes
A guide range is only a starting point: the guide price tool gives an instant figure for your size, and a free survey turns it into a fixed quote.
Do you need planning permission for a wraparound extension in Sunderland?
Here is how the rules work for a wraparound extension in England. In England a wraparound extension combines side and rear elements, which normally takes it outside permitted development, so a householder planning application is made.
Where work involves a shared wall, building on the boundary, or digging foundations within 3 metres of a neighbour’s building and deeper than its foundations (or within 6 metres for deeper work), the Party Wall etc. Act 1996 applies and notices must be served before work starts.
At the survey we check your house’s planning history and any restrictions, and tell you which route applies.
What we handle
From survey to sign-off, the job normally involves:
- Underfloor heating option, electrics and plastering
- Walls, roof and glazing
- Party wall notices and surveyor liaison
- Foundations and drainage
- Removal of internal and external walls
- Structural engineer’s design for steels and supports
How long does it take?
Allow 12 to 18 weeks on site. Before that, surveys, drawings and approvals usually take 3 to 4 months, longer if the council asks for changes.
Building in Sunderland
The North East has many terraced streets and post-war semis, where rear extensions and loft conversions are popular ways to gain space.
From SR1 outwards, we take on projects throughout Sunderland and the surrounding parts of Tyne and Wear.
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
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 about wraparound extensions in Sunderland
Will both neighbours be affected?
Usually only the neighbour on the side return side, but rear foundations near either boundary can trigger party wall notices.
What about the old back addition?
The side wall of the back addition is usually removed and replaced with a steel beam, so the old kitchen joins the new space.
How much does a wraparound extension cost in Sunderland?
In Sunderland, a wraparound extension typically costs £2,000–£2,900 per m² of floor area, including VAT at 20% (standard rate). A typical 28 m² project comes to roughly £56,000–£81,000. Your fixed price depends on the survey and drawings.
How long does it take to build?
Around 12 to 18 weeks on site after approvals. Design, planning and party wall matters usually take 3 to 4 months beforehand.
Who approves a wraparound extension in Sunderland?
Planning matters in Sunderland go to the council covering your address, and the work needs building control approval. We prepare and submit the applications for you.