Two-storey wraparound extensions in Southend-on-Sea
Thinking about a two-storey wraparound extension in Southend-on-Sea? We design it, take it through the approvals it needs and build it, with one team responsible from the first visit to the final certificate.
Useful details for planning a two-storey wraparound extension in Southend-on-Sea.
- Postcode districts
- SS0, SS1, SS2 and SS3
- County / area
- Essex, England
- Price region
- East of England
- Guide price
- £124,000–£170,000 (£2,210–£3,040 per m²)
- Approval route
- Planning permission is needed: the side part takes it outside permitted development in England.
- Nearest towns
- Rochford (3.1 miles), Hadleigh (4.6 miles), Rayleigh (5.8 miles)
- First visit
- Free, no obligation
About a two-storey wraparound extension
A two-storey wraparound extension suits a house with space both beside it and behind it, where you want to transform the layout rather than add a single room. You get one design for the whole L-shape, the planning application, structural design for the corner and the openings into the house, building regulations approval and the build, managed by us and carried out by vetted teams working under S&K.
We cover postcode districts SS0, SS1, SS2 and SS3 in and around Southend-on-Sea, along with neighbouring Rochford, Hadleigh and Rayleigh.
What it costs in Southend-on-Sea
Guide prices for two-storey wraparound extensions in the East of England are around £2,210–£3,040 per m² of new floor space, including VAT. For a typical project with an L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space), that's roughly £124,000–£170,000. These are guides, not quotes. Ground conditions, steelwork and access can move the figure either way.
| Spec | Per m² | An L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space) |
|---|---|---|
| Essential | £2,040–£2,800 per m² | £114,000–£156,500 |
| Standard | £2,210–£3,040 per m² | £124,000–£170,000 |
| Premium | £2,660–£3,650 per m² | £149,000–£204,000 |
Planning and building regulations in Southend-on-Sea
In England, a two-storey wraparound extension needs householder planning permission, because any extension beyond a side wall must be single storey to be permitted development. The application costs £548 (or £575 for applications made from 8 December 2026). Councils weigh the side part against the street scene and the rear part against neighbours' light and outlook, and should decide within 8 weeks of validation.
Approval in England: Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
Building regulations: Building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end.
Design points for Southend-on-Sea homes
Daylight to the middle
A deep L-shaped plan can leave the middle of the ground floor dark, because the old rear rooms are now enclosed. We use wide rear openings, a well-placed stair and, where part of the extension is single storey, roof lights, while keeping total glazing within the Part L allowance.
Two roofs that meet
A wraparound needs the side roof and rear roof to join cleanly, often with a valley or hip where they meet. Getting pitches and ridge heights right keeps rainwater moving and avoids a bulky mass at the back corner, which neighbours and planners notice.
How we'd run your project
Measure and listen
A visit to Southend-on-Sea to understand how you live in the house now and what the extra rooms need to do, plus a first look at the structure.
Plans, then approval
Measured survey, design, then the right approval route for your house. We explain each step before we take it.
Engineer it
Foundations sized for two floors, steels for any openings, and building control approval, all before anyone starts on site.
Build
Foundations, walls, floor, roof, windows, then first and second fix. We break through into the house as late as we can.
Questions about two-storey wraparound extensions in Southend-on-Sea
Do I need planning permission for a two-storey wraparound extension in Southend-on-Sea?
Southend-on-Sea is in England, so England planning rules apply. Planning permission is needed: the side part takes it outside permitted development in England. If in doubt, a lawful development certificate or a planning application gives you certainty before you build.
How much does a two-storey wraparound extension cost in Southend-on-Sea?
Our guide for the East of England, which covers Southend-on-Sea, is £2,210–£3,040 per m² including VAT. A typical project with an L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space) comes to about £124,000–£170,000. Design and approval fees are extra, and we fix the build price in writing once the design is agreed.
Who handles building regulations for a project in Southend-on-Sea?
We handle it as part of the project. What's needed in England: building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end. We prepare the drawings and the engineer's calculations, book the inspections and pass you the completion paperwork at the end.
Can I stay at home during a wraparound extension?
Many people do, but a wraparound affects two sides of the house and usually the kitchen, so there will be weeks without a full kitchen. We plan a temporary kitchen, keep a route through the house and seal off the work area. For some families, moving out while the rear wall is opened up is easier.
Can a wraparound extension be part single, part two-storey?
Yes. Many wraparounds keep the rear part single storey with roof lights over the kitchen and put the two-storey part to the side. This can reduce the effect on neighbours and the cost. We set out both options at the design stage, so you can compare floor space against price before choosing.
Nearby
We also cover places near Southend-on-Sea, including:
Other extensions in Southend-on-Sea
- Rear
- Side
- Part two-storey
- Over a garage
- First floor
- Semi-detached
- Detached
- Kitchen and bedrooms
- Bedroom and en-suite
All two-storey extension services in Southend-on-Sea · Two-storey wraparound extensions across Essex
Send us your postcode and a few details. We'll get back to you to arrange a visit and talk through your options.