Greater Manchester

Home extensions in Middleton

We design and build house extensions for homes in Middleton and the surrounding Greater Manchester area, with guide prices adjusted for the region.

Postcode districtsM9, M24, OL9, OL10
Price regionNorth West England (×0.95)
Planning rulesEngland
Site visitFree, no obligation

Get my guide price Call 0800 088 6341

Two-storey rear extension on a brick semi-detached house with a hipped roof

Approvals for an extension in Middleton

In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.

In England a two-storey rear extension is permitted development only if it projects no more than 3 m from the original rear wall, sits at least 7 m from the rear boundary, matches the roof pitch and uses obscure, non-opening side windows upstairs. Most two-storey extensions therefore go through a householder planning application, which costs £548 from 1 April 2026 and normally takes about 8 weeks.

In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.

Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.

Applications are decided by the local planning authority (your district, borough or unitary council).

What extensions cost in Middleton

Prices on this page use our North West England factor of ×0.95, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.

Extension type	Example size	Standard spec (inc VAT)
Conservatory replacement extensions	14 m²	£28,500 – £37,000
Extensions over a garage	12 m²	£23,500 – £31,000
Kitchen extensions	20 m²	£39,500 – £50,500
Single-storey rear extensions	20 m²	£38,500 – £49,500
Side return extensions	11 m²	£25,000 – £31,500
Orangery extensions	16 m²	£42,500 – £53,500
Double-storey extensions	32 m²	£54,500 – £71,500

What works best for Middleton houses?

The North West has a high share of Victorian and Edwardian terraces with rear yards and outriggers, plus large areas of inter-war semis in the suburbs.

For many houses here, single-storey rear extensions, side return extensions or kitchen extensions gives the most useful space for the budget.

Middleton and surrounding towns

Across M9, M24, OL9, OL10, we can visit, measure and advise. We also work in nearby Chadderton (2 miles), Heywood (3 miles), Royton (3 miles), Oldham (3 miles), Failsworth (3 miles). Just over the Lancashire border, Rawtenstall is about 11 miles away.

Choose an extension type

Free site visit
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
Build and sign-off
The build is managed from start to finish, inspected at each stage and signed off on completion.

Questions about extensions in Middleton

How much does an extension cost in Middleton?

Using our North West England factor (×0.95), a standard-spec single-storey extension of 20 m² is a guide £38,500 to £49,500 including VAT, and a 32 m² two-storey extension £54,500 to £71,500. Your written price follows the survey.

Do I need planning permission for an extension in Middleton?

Not always. It depends on the size, position and your property's history. Many single-storey rear extensions in England are permitted development or can use prior approval.

Who do I contract with?

Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.

Will my neighbours need to be told?

If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.

Can I get a price before anyone visits?

Yes. This page shows guide prices adjusted for Middleton, and the guide-price tool gives a range for your own size and finish in about a minute.

Book a free site visit in Middleton

We will measure up, check the planning position and give you honest guide figures.

Free, no-obligation site visit
Planning route checked before you spend on drawings
Written price once the design is agreed
Building control sign-off at the end

Prefer to talk? Call 0800 088 6341 or .

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