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Newport, Isle of Wight

Semi-detached rear extension in Newport

Semi-detached rear extension in Newport: single or two-storey extensions for semi-detached houses, with side access and one party wall. We measure the house, show you what the rules allow, price it in writing and build it.

Newport sits in the Isle of Wight, with postcode districts including PO30, PO32 and PO33. Where a Newport semi already has a small lean-to at the back, we usually replace it rather than extend it.

Ask about a site visit

Visits here are by arrangement; we'll confirm before booking.

Newport 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 semi-detached rear extension cost in Newport?

A semi-detached rear extension in Newport is priced at £2,130–£3,470 per square metre including VAT as a guide, before kitchen fit-out and fees. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.

Semi-detached rear extension prices in Newport
SizeGuide price inc VAT
3 m wide × 4 m deep (12 m²)£25,500–£41,500
4 m wide × 5 m deep (20 m²)£42,500–£69,500
4 m wide × 6 m deep (24 m²)£51,000–£83,500

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 semi-detached rear extension in Newport?

Here is how the rules in England apply to a semi-detached rear extension in Newport.

Under England's householder permitted development rules you can usually add 3 metres at the back of an attached house, or 4 metres on a detached house, without a planning application, as long as the extension stays under 4 metres high and its eaves stay under 3 metres where it is within 2 metres of a boundary.

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.

England also has the larger home extension route: a single-storey rear extension of up to 6 metres on an attached house or 8 metres on a detached house, after prior approval from the council. The council notifies your neighbours and has 42 days to decide; the fee is £249 (£310 for applications made from 8 December 2026). The route is not available on designated land such as conservation areas.

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 Newport like to extend?

Newport has a mix of Victorian terraces near the centre and larger Edwardian and inter-war houses further out. Clay soils across much of the South East mean deeper foundations near trees, which we plan for at the survey.

How a semi-detached rear extension in Newport comes together

  1. Look round and measure

    We see the back of the house, measure it, check the drains and boundaries and hear what you need.

  2. Options and costs

    We draw layout options and price each one, so the budget shapes the design rather than surprising you later.

  3. Paperwork handled

    Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.

  4. 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.

Semi-detached rear extensions near Newport

From Newport, the nearest places we also cover are East Cowes (3.9 miles) and Cowes (4.2 miles).

Other work in Newport:

All rear extensions in Newport

FAQ

Semi-detached rear extension questions in Newport

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.

Do I need planning permission for a rear extension in Newport?

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.

Single or two-storey on a semi?

Two-storey if you need bedrooms, single-storey if you need a bigger kitchen. Planning risk is lower for single-storey.

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.

How long does a rear extension take to build in Newport?

Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.

Is the site visit in Newport free?

Visits here are by arrangement; we confirm whether we can take the job and agree any travel costs first.

Next step

See what your rear extension would cost

Get a guide price online in a couple of minutes, or ask us about a site visit: visits here are by arrangement, and we confirm before booking.

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