Cowes, Isle of Wight
Two-storey rear extension in Cowes
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. We design, get the approvals for and build two-storey rear extensions in Cowes and the surrounding area, with one contract from the first survey to building control sign-off.
Cowes is covered from our Isle of Wight round, including PO31. Two-storey rear extensions suit semi-detached houses in Cowes best, where the extra bedroom matters as much as the bigger kitchen.
Ask about a site visit
Visits here are by arrangement; we'll confirm before booking.
Cowes is outside our regular coverage, so visits and projects here are by arrangement: we confirm whether we can take the job, and agree any travel costs, before the first visit.
How much does a two-storey rear extension cost in Cowes?
Guide prices for a two-storey rear extension in Cowes start from our South East England rate of £2,020–£3,020 per square metre, including VAT. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £60,500–£90,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £97,000–£145,000 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a two-storey rear extension in Cowes?
Whether your two-storey rear extension in Cowes needs a planning application depends on its size, your house and any local restrictions.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Cowes like to extend?
Around Cowes the housing ranges from inter-war semis to 1960s and 1970s estates with good-sized gardens. Many of the newer estates had permitted development rights removed by condition, so we check the planning history before anything is drawn.
How a two-storey rear extension in Cowes comes together
Site visit by arrangement
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
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.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Two-storey rear extensions near Cowes
We also build two-storey rear extensions in nearby East Cowes (0.5 miles) and Newport (4.2 miles).
- Two-storey rear extension in East Cowes
- Two-storey rear extension in Newport
- Two-storey rear extension in Ryde
- Two-storey rear extension in Sandown
- Two-storey rear extension in Shanklin
Other work in Cowes:
FAQ
Two-storey rear extension questions in Cowes
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
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 it be built on a terraced house?
Sometimes, but the upper floor is harder to get through planning on a terrace because of the effect on neighbours. A single-storey extension with a loft conversion is often an easier route.
Can you match the brick or stone on my Cowes house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How much does a two-storey rear extension cost in Cowes?
As a guide, £2,020–£3,020 per square metre including VAT for a standard specification. For example, 3 m × 5 m footprint, two floors (30 m²): about £60,500–£90,500 at that rate. Your written price follows the survey.
Is the site visit in Cowes free?
Visits here are by arrangement; we confirm whether we can take the job and agree any travel costs first.