Back-of-house extension drawings for Oldham homes — the glazed kitchen-diner across the rear, drawn to Oldham Council's depth and daylight limits, delivered in days and revised free until your decision, with a free approval-odds check first.
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.
The rear extension is the workhorse of Oldham home improvement — it is how a dark back kitchen becomes an open family room facing the garden. Because 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, most back walls sit close to a neighbour on at least one side, and that proximity, not the design, is what Oldham Council scrutinises. The council reads the 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, and the first line an officer draws is the 45-degree splay from the neighbour's nearest window.
So the drawings live or die on geometry. We set the depth against the exact permitted-development figure, hold the eaves and the flat-roof or lantern build-up under the 4-metre height ceiling, and show the projection tested against both the 45-degree plan angle and the 25-degree section angle to the neighbouring windows. 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 the rear elevation is composed around it rather than corrected after an objection.
Where the property sits in a conservation area — Uppermill, Dobcross, Delph, Greenfield, Lydgate and Grasscroft among Oldham's — the larger-home extension route is switched off and even a modest rear addition needs consent. 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. We confirm the designation before the survey.
Many single-storey rear extensions in Oldham are permitted development and need no application. You will normally need to apply to Oldham Council, or use the larger-home prior-approval route, if any of these apply:
We draw the depth, the roof build-up and the daylight splays to each neighbour on the page — the tests Oldham Council's officers apply first — and submit a validation-complete pack, whether that is a lawful development certificate, a larger-home prior-approval notice or a full householder application.
Below is Oldham Council's real householder decision record, taken 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. Rear extensions turn most often on neighbour daylight and depth, so a drawing pack that proves those tests upfront is decided faster and refused less often than a DIY submission.
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 approved rear extension is typically a single-storey glazed box within the depth limit, roofed either flat with a lantern or in a shallow mono-pitch, and finished in brick or render to match the host wall. On the borough's saddleworth gritstone weavers' cottages with stone-mullioned windows, keeping the projection to the permitted-development figure often avoids an application entirely; where owners want the full 6 metres, the larger-home route succeeds when the neighbour-consultation period passes without a sustained objection.
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 keep the extension inside the daylight splays, set any glazed roof below the first-floor cill, and retain the garden depth Oldham Council expects — so the back elevation answers the amenity case before a neighbour can lodge one. Two-storey rear extensions we draw with the 7-metre boundary gap and privacy screening resolved on the plan.
We draw rear extensions on every street in the borough. A few of the neighbourhoods where Oldham back-of-house projects come up most often:
Rear extension drawings for Uppermill's flagship Saddleworth stone conservation village of weavers' cottages and converted mills — depth-checked, daylight-tested and drawn to Oldham Council's guidance.
Rear extension drawings for Dobcross's small gritstone village with a tight historic core around Dobcross Square — depth-checked, daylight-tested and drawn to Oldham Council's guidance.
Rear extension drawings for Delph and Greenfield's stone hill villages on the Peak District National Park fringe — depth-checked, daylight-tested and drawn to Oldham Council's guidance.
Rear extension drawings for Chadderton's former mill town of Victorian terraces with interwar and post-war semis — depth-checked, daylight-tested and drawn to Oldham Council's guidance.
Rear extension drawings for Royton's dense red-brick millworkers' terraces with newer estate infill — depth-checked, daylight-tested and drawn to Oldham Council's guidance.
Rear extension drawings for Werneth's inner-Oldham high-density terraces under conversion and HMO pressure — depth-checked, daylight-tested and drawn to Oldham Council's guidance.
How far you can extend at the back in Oldham depends on your house type and the route you take. This is how the options compare.
| Route | Depth allowed | Consent needed | What Oldham Council checks |
|---|---|---|---|
| Standard permitted development | 3m terrace/semi · 4m detached | Lawful development certificate (optional) | Depth, 4m height, materials |
| Larger-home prior approval | 6m terrace/semi · 8m detached | Prior-approval notice + neighbour consultation | Neighbour objections on amenity |
| Full householder application | Beyond the above, or two-storey | Full planning permission | Daylight (45°/25°), bulk, garden retained |
| Conservation area | Case by case | Full planning permission | Character, roof form, boundary treatment |
The larger-home route is switched off on designated land — conservation areas such as Uppermill and Dobcross and Article 4 streets need a full application.
A fixed process built around how Oldham Council validates and decides rear-extension applications — most drawings are submission-ready within seven days of survey.
Send us your Oldham postcode and house type. We confirm your conservation and Article 4 status, how much rear-extension depth you have under permitted development, and score your odds against live Oldham Council decisions.
We measure the original rear wall, floor and eaves levels, side and rear boundary distances and the neighbours' window positions — the numbers the depth limit and daylight splays depend on.
Chartered designers develop the single or two-storey rear extension to your brief, drawn inside the permitted-development limits or to Oldham Council's extension design guidance, with the daylight angles shown.
We submit the certificate, prior-approval notice or application, handle validation and case-officer queries, and revise the drawings free until Oldham Council issues its decision.
Often not. 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 involve Oldham Council for anything deeper via the larger-home route, for two-storey rear extensions, and for any rear extension in a conservation area such as Uppermill and Dobcross, where those permitted-development rights fall away.
The larger-home extension scheme lets a single-storey rear extension reach 6 metres on a terrace or semi, or 8 metres on a detached house — double the standard allowance. It is not automatic: you submit a prior-approval notification to Oldham Council, neighbours are consulted, and if one objects on amenity grounds the council rules on it. It also does not apply on designated land such as Oldham's conservation areas.
It is the daylight test Oldham Council applies to protect neighbours. Drawn on plan, a line at 45 degrees from the midpoint of the neighbour's nearest ground-floor window should not be crossed by your extension; a companion 25-degree line is checked in section. If the projection breaches it, the extension is likely to be shortened or refused, so we test and prove it on the drawings before submission.
A two-storey rear extension almost always needs a full householder application to Oldham Council, as it sits outside permitted development on most homes. The council checks that it stays at least 7 metres from the rear boundary, does not overbear the neighbours and avoids new overlooking. We resolve the boundary gap, privacy and daylight on the plans so the application is decided on its merits.
Frequently, yes. If the rear extension involves work to a shared wall, building up to the boundary, or excavating foundations near a neighbour's structure, the Party Wall etc. Act applies and you must serve notice — this is separate from Oldham Council's planning decision. We flag it early and can prepare the drawings a party-wall surveyor needs alongside the planning set.
We price each Oldham rear extension on its own footprint and send a fixed, no-obligation quote within one working day. It covers the full drawing pack with free revisions until Oldham Council approves, and we confirm at the outset whether your extension is permitted development, needs prior approval, or a full application. Call 020 7864 7245 to begin.
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Same fixed quotes, same fast drawings — wherever your project is.