Single-storey, double-storey, rear and side extension drawings for Oldham homes — measured to Oldham Council's design guidance, delivered in days and revised free until your decision, with a free approval-odds check before you commit.
Oldham Council granted 88% of the householder planning decisions it made in its latest published year — 1 point above the 87% England-wide householder average. Eastern Saddleworth falls inside the Peak District National Park, where the National Park Authority — not Oldham Council — is the planning authority and applies its own stricter tests, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901), Edwardian (1901–1910), interwar (1918–1939) and postwar (1945–1970) housing stock sets the design brief on most streets.
The permitted-development ceilings are fixed: 40m³ of new roof volume for a terraced loft and 50m³ for a semi or detached house under Class B, plus a 3m single-storey rear extension on a terrace or 4m on a detached house under Class A. Oldham carries at least one Article 4 direction, and conservation areas including Uppermill, Dobcross and Delph remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Oldham is determined against an 8-week statutory target.
Uppermill (flagship Saddleworth stone conservation village of weavers' cottages and converted mills), Dobcross (small gritstone village with a tight historic core around Dobcross Square), Delph and Greenfield (stone hill villages on the Peak District National Park fringe), Chadderton (former mill town of Victorian terraces with interwar and post-war semis), Royton (dense red-brick millworkers' terraces with newer estate infill) and Werneth (inner-Oldham high-density terraces under conversion and HMO pressure) — these are the Oldham pockets our drawings cover most. Heritage designations here include Uppermill, Dobcross, Delph, Greenfield, Lydgate and Grasscroft. Oldham Council weighs each proposal against Places for Everyone (the Greater Manchester joint plan, effective March 2024) alongside the emerging Oldham Local Plan Review and saved Local Plan policies, where the gritstone and stone-slate vernacular of Saddleworth drives numerous conservation areas and materials controls, in sharp contrast to the red-brick urban west. Converted flats and HMOs cluster in inner Oldham around Werneth and Coppice, and none of those units carry householder permitted-development rights.. On roofs the borough is stone-flag and blue-slate roofs on the Saddleworth gritstone cottages and natural slate on the brick terraces, over Saddleworth gritstone weavers' cottages with stone-mullioned windows, Victorian and Edwardian millworkers' terraces in red brick and interwar and post-war suburban semis.
Oldham homes come in a handful of recurring shapes, and each one points to a different extension. The borough is built largely from Saddleworth gritstone weavers' cottages with stone-mullioned windows, Victorian and Edwardian millworkers' terraces in red brick and interwar and post-war suburban semis, so a Victorian terrace usually wants a rear or side-return infill, while an interwar semi has room for a wider single-storey wrap or a two-storey side addition. Oldham Council judges every one of them against Places for Everyone (the Greater Manchester joint plan, effective March 2024) alongside the emerging Oldham Local Plan Review and saved Local Plan policies, weighing footprint, height and the impact on the house next door before it looks at the elevations.
That is why the drawings decide the outcome. We set the extension depth against the permitted-development limits precisely, keep the eaves and ridge within the allowances, and plot the 45-degree daylight lines to the neighbours' windows so the case officer can see the amenity test is passed. Eastern Saddleworth falls inside the Peak District National Park, where the National Park Authority — not Oldham Council — is the planning authority and applies its own stricter tests, so we design around it from the first sketch rather than discover it at validation.
Oldham also protects whole streets — Uppermill, Dobcross, Delph, Greenfield, Lydgate and Grasscroft among them. Oldham's borough-wide Article 4 direction, in force from January 2026, removes the permitted-development right to convert a house (C3) to a small HMO (C4), and further Article 4 controls apply in the Saddleworth conservation areas to protect their stone character. On designated land the larger-home extension route and most side extensions stop being permitted development, so we confirm your address against those layers before drawing a line.
Plenty of Oldham extensions are permitted development and need no planning application — a single-storey rear extension within the depth and height limits is the common case. You will normally need to apply to Oldham Council if any of these apply:
We draw the footprint, the ridge and eaves heights and the neighbours' daylight on the page — the relationships Oldham Council's officers weigh first — and submit a validation-complete pack, whether that is a lawful development certificate, a prior-approval notification or a full householder application.
Below is Oldham Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Oldham approves the large majority of planning applications, but the split between protected Saddleworth stone villages and the dense red-brick urban core means design expectations vary sharply across the borough. A complete, policy-literate extension pack anticipates those pressure points before submission, which is why professionally drawn applications are decided faster and refused less often than DIY ones.
Source: MHCLG planning application statistics (householder decisions, England, 1 April 2025 - 31 March 2026). Compare every borough on our London approval-rate league table.
Tell us about your project and get a fixed, no-obligation quote back within one working day. If you don't need planning permission at all, we'll tell you that too — for free.
Across Uppermill, Dobcross and Delph and Greenfield, the extension that lands most often is the single-storey rear addition — a glazed kitchen-diner across the back of the house, kept within the permitted-development depth or taken to a full application where the ground floor wants more. On the borough's saddleworth gritstone weavers' cottages with stone-mullioned windows, a side-return infill frequently pairs with it to square off the plan; on wider interwar and post-war suburban semis, a two-storey side or rear extension can add a bedroom above without swallowing the garden.
The gritstone and stone-slate vernacular of Saddleworth drives numerous conservation areas and materials controls, in sharp contrast to the red-brick urban west. We size the extension to the amenity and daylight tests, match the roof and materials to the host house, and keep enough garden to satisfy Oldham Council's space standards — so the scheme answers the borough's questions before an objection can raise them. Where permitted-development rights are used up or removed, we prepare the householder application to the council's extension design guidance instead.
We draw extensions on every street in the borough. A few of the neighbourhoods where Oldham projects come up most often:
Extension drawings for Uppermill's flagship Saddleworth stone conservation village of weavers' cottages and converted mills — footprint-checked, daylight-tested and drawn to Oldham Council's guidance.
Extension drawings for Dobcross's small gritstone village with a tight historic core around Dobcross Square — footprint-checked, daylight-tested and drawn to Oldham Council's guidance.
Extension drawings for Delph and Greenfield's stone hill villages on the Peak District National Park fringe — footprint-checked, daylight-tested and drawn to Oldham Council's guidance.
Extension drawings for Chadderton's former mill town of Victorian terraces with interwar and post-war semis — footprint-checked, daylight-tested and drawn to Oldham Council's guidance.
Extension drawings for Royton's dense red-brick millworkers' terraces with newer estate infill — footprint-checked, daylight-tested and drawn to Oldham Council's guidance.
Extension drawings for Werneth's inner-Oldham high-density terraces under conversion and HMO pressure — footprint-checked, daylight-tested and drawn to Oldham Council's guidance.
The right extension in Oldham depends on your house type and how much garden you can give up. This is how the main options compare on planning route and what they add.
| Extension type | Permitted development? | What it adds | What Oldham Council checks |
|---|---|---|---|
| Single-storey rear | Often, within 3m/4m depth (6m/8m via prior approval) | Bigger kitchen-diner across the back | Depth, height, neighbour daylight (45°) |
| Side-return infill | Sometimes, if within width and height limits | Squares off an L-shaped ground floor | Width vs the original house, glazing to boundary |
| Two-storey rear/side | No — full application | Extra bedroom or bathroom above | Bulk, overlooking, 7m rear-boundary gap |
| Wraparound (rear + side) | No — full application | Whole-width open-plan ground floor | Combined footprint and garden retained |
Route depends on your street — conservation areas such as Uppermill and Dobcross and Article 4 directions can remove permitted-development rights.
A fixed process built around how Oldham Council validates and decides householder extension applications — most drawings are submission-ready within seven days of survey.
Tell us your Oldham postcode and house type. We confirm your conservation and Article 4 status, how much permitted-development depth you have left, and score your odds against live Oldham Council decisions.
We measure the existing footprint, floor and eaves levels, boundary distances and the neighbours' window positions — the numbers the depth limits and daylight tests depend on.
Chartered designers develop the single-storey, two-storey or side extension to your brief, drawn inside the permitted-development limits or to Oldham Council's extension design guidance.
We submit the certificate, prior-approval notice or application, manage validation and case-officer queries, and revise the drawings free until Oldham Council issues its decision.
Not always. A single-storey rear extension up to 3 metres deep on a terrace or semi, or 4 metres on a detached house, and no higher than 4 metres, is usually permitted development. In Oldham you will need to apply to Oldham Council for two-storey extensions, side extensions wider than half the house, anything forward of the front wall, deeper rear extensions under the larger-home prior-approval route, and any extension in a conservation area such as Uppermill and Dobcross.
Standard permitted development allows 3 metres on a terraced or semi-detached house and 4 metres on a detached one. The larger-home extension scheme can double that to 6 or 8 metres, but it needs a prior-approval notification to Oldham Council and a neighbour-consultation period, and it does not apply on designated land such as Oldham's conservation areas. We confirm which route your property qualifies for before drawing.
Two-storey and double-storey extensions almost always need a full householder application to Oldham Council, because they fall outside permitted development on most homes. The council looks closely at bulk, overlooking of neighbours and the 7-metre gap a two-storey rear extension must keep from the rear boundary. We design to those tests and show the daylight and privacy angles on the drawings.
A householder planning application in Oldham runs to a statutory eight-week target, a larger-home prior-approval notification to around six weeks including the neighbour-consultation period, and a lawful development certificate to eight weeks. Incomplete submissions stall at validation, so we submit a complete pack and manage officer queries to keep the decision on schedule. Oldham Council is the decision-maker.
Yes — planning permission and building regulations are separate consents, and almost every extension needs both. Planning governs whether you can build it; building control governs how it is built, covering structure, insulation, drainage and fire safety. We prepare the building-regulations drawings alongside the planning set so Oldham Council's building control or an approved inspector can sign the work off.
Every house and brief is different, so we price each Oldham extension individually and send a fixed, no-obligation quote back within one working day. It covers the full drawing pack with free revisions until Oldham Council approves, and we tell you upfront whether your extension qualifies as permitted development. Call 020 7864 7245 to get started.
Answer five quick questions and get a free planning score for your exact address — instantly. Then, if you want the full picture, unlock the detailed analysis: your council's live approval rates, local precedents, constraints on your street and a step-by-step route to permission.
Same fixed quotes, same fast drawings — wherever your project is.