Southend-on-Sea, Essex
Two-storey rear extension in Southend-on-Sea
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. If you live in Southend-on-Sea and want to know what a two-storey rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Southend-on-Sea is covered from our Essex round, including SS0, SS1, SS2 and SS3. Two-storey rear extensions suit semi-detached houses in Southend-on-Sea best, where the extra bedroom matters as much as the bigger kitchen.
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 two-storey rear extension cost in Southend-on-Sea?
A two-storey rear extension in Southend-on-Sea is priced at £1,910–£2,860 per square metre including VAT as a guide, before kitchen fit-out and fees. East of England prices run slightly above our West Midlands baseline; clay soils near trees are the main foundation variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £57,000–£86,000 |
| 4 m × 6 m footprint, two floors (48 m²) | £91,500–£137,500 |
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 two-storey rear extension in Southend-on-Sea?
Planning for a two-storey rear extension in Southend-on-Sea follows the English householder rules.
England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.
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 Southend-on-Sea like to extend?
Post-war semis and newer estates are typical of Southend-on-Sea, and many have room for a full-width extension. Shrinkable clay is common in the East of England, so foundations near trees and hedges are designed to NHBC-style depth guidance.
How a two-storey rear extension in Southend-on-Sea 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Two-storey rear extensions near Southend-on-Sea
Close by, we work in Rochford, about 3.1 miles away, and Hadleigh, about 4.6 miles away.
- Two-storey rear extension in Rochford
- Two-storey rear extension in Hadleigh
- Two-storey rear extension in Rayleigh
- Two-storey rear extension in Canvey Island
- Two-storey rear extension in South Benfleet
Other work in Southend-on-Sea:
FAQ
Two-storey rear extension questions in Southend-on-Sea
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
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.
Will we need to move out?
Rarely. The first-floor opening is made late in the job and sealed with temporary screens.
Do you handle building control in Southend-on-Sea?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
How much does a two-storey rear extension cost in Southend-on-Sea?
As a guide, £1,910–£2,860 per square metre including VAT for a standard specification. For example, 3 m × 5 m footprint, two floors (30 m²): about £57,000–£86,000 at that rate. Your written price follows the survey.
Can you match the brick or stone on my Southend-on-Sea house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.