Chadderton house extensions
From a small utility to a two-storey addition, we take on house extensions throughout Chadderton, starting with a free visit and a planning check.
- Postcode districtsM24, M35, OL1, OL2, OL8, OL9
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Choosing the right extension in Chadderton
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.
The types we would usually look at first for a home in Chadderton are single-storey rear extensions, side return extensions and double-storey extensions, depending on the garden and how the house is laid out.
Areas we cover around Chadderton
Across M24, M35, OL1, OL2, OL8, OL9, we can visit, measure and advise. We also work in nearby Oldham (1 mile), Royton (2 miles), Middleton (2 miles), Failsworth (3 miles), Ashton-under-Lyne (4 miles). For homes towards Lancashire, Rawtenstall is around 12 miles away.
Chadderton extension prices at a glance
Every figure below is a guide for Chadderton, adjusted for North West England build costs (×0.95) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Side return extensions | 11 m² | £25,000 – £31,500 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
| Orangery extensions | 16 m² | £42,500 – £53,500 |
Planning rules in Chadderton
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).
Extension types and starting prices
- Flat roof extensions · from £19,500
- Bedroom extensions · from £24,500
- Orangery extensions · from £28,500
- Extensions over a garage · from £22,500
- Utility and boot room extensions · from £13,000
- Pitched roof extensions · from £21,000
- Extension plans and drawings · from £1,100
- Side extensions · from £20,500
- Single-storey rear extensions · from £19,500
- Kitchen extensions · from £25,500
- Annexe extensions · from £52,000
- Side return extensions · from £17,000
- Timber frame extensions · from £19,500
- Planning permission for extensions · from £300
- Wraparound extensions · from £34,000
- Glass box extensions · from £28,500
- Porch extensions · from £3,800
- Home office extensions · from £15,000
- Building regulations for extensions · from £850
- Bungalow extensions · from £24,500
- Conservatory replacement extensions · from £19,000
- Double-storey extensions · from £36,000
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Chadderton
How much does an extension cost in Chadderton?
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 you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Do I need planning permission for an extension in Chadderton?
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.
Book a free site visit in Chadderton
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 .
Book a free site visit
Tell us a little about the project and we will arrange a time.