The fast route to a deep single-storey rear extension in Oldham — up to 6 metres on an attached house or 8 on a detached one — via Oldham Council's prior approval scheme rather than a full planning application.
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 ordinary Class A limits stop a single-storey rear extension at 3 metres on an attached house and 4 on a detached one. The larger home extension scheme doubles both, on condition that the council is told first. That notification is not an application for permission — the council cannot refuse on design, materials or policy grounds. It can only consider the effect on the amenity of adjoining premises, and only if a neighbour actually objects during the 21-day consultation.
The other conditions still apply and are strict: single storey only, no higher than 4 metres, eaves no higher than the existing eaves, and no more than half the land around the original house covered. It is not available on designated land, so a house in a conservation area such as Uppermill and Dobcross cannot use it at all. Materials must be similar to the existing house, and the extension must not include a veranda, balcony or raised platform.
Oldham is largely Saddleworth gritstone weavers' cottages with stone-mullioned windows, Victorian and Edwardian millworkers' terraces in red brick and interwar and post-war suburban semis. 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 matters here because an objecting neighbour puts amenity squarely in front of a case officer. 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.
The scheme is available where all of these hold. Fail any one and it is a full application to Oldham Council instead:
We prepare the notification pack Oldham Council needs — plans, elevations, a site plan with the adjoining owners identified — and manage the 21-day neighbour consultation so the 42-day clock is not restarted by an incomplete submission.
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. Prior approval turns on neighbour amenity alone, so the drawings that matter are the ones showing the relationship to the boundary.
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 notifications that clear without objection are the ones that treat the neighbour as the audience. We show the extension in section against the boundary, demonstrate the 45-degree daylight relationship to the nearest habitable window, and where the plot is tight we taper the depth away from the boundary rather than running the full 6 metres to the fence.
The gritstone and stone-slate vernacular of Saddleworth drives numerous conservation areas and materials controls, in sharp contrast to the red-brick urban west. Where an objection does arrive, the council's assessment is narrow: loss of light, outlook and overbearing effect on the adjoining property, nothing else. A pack that has already answered those three points on the drawings usually survives an objection, whereas one that leaves them to the officer's imagination usually does not.
We prepare prior-approval notifications across Oldham. A few of the areas where deep rear extensions come up most often:
Prior approval drawings for Uppermill — flagship Saddleworth stone conservation village of weavers' cottages and converted mills — dimensioned to the 6m and 8m limits and prepared for Oldham Council's neighbour consultation.
Prior approval drawings for Dobcross — small gritstone village with a tight historic core around Dobcross Square — dimensioned to the 6m and 8m limits and prepared for Oldham Council's neighbour consultation.
Prior approval drawings for Delph and Greenfield — stone hill villages on the Peak District National Park fringe — dimensioned to the 6m and 8m limits and prepared for Oldham Council's neighbour consultation.
Prior approval drawings for Chadderton — former mill town of Victorian terraces with interwar and post-war semis — dimensioned to the 6m and 8m limits and prepared for Oldham Council's neighbour consultation.
Prior approval drawings for Royton — dense red-brick millworkers' terraces with newer estate infill — dimensioned to the 6m and 8m limits and prepared for Oldham Council's neighbour consultation.
Prior approval drawings for Werneth — inner-Oldham high-density terraces under conversion and HMO pressure — dimensioned to the 6m and 8m limits and prepared for Oldham Council's neighbour consultation.
Same extension, two routes, very different tests.
| Route | Depth allowed | What the council may consider | Timescale |
|---|---|---|---|
| Ordinary Class A permitted development | 3m attached / 4m detached | Nothing — no application needed | Immediate |
| Larger home extension prior approval | 6m attached / 8m detached | Amenity of adjoining premises, only if a neighbour objects | 21-day consultation, 42-day determination |
| Full householder application | No fixed limit | Design, materials, policy, amenity, everything | 8-week target |
| Any of these on designated land | 3m / 4m only | Prior approval scheme unavailable | Full application beyond the limits |
Limits and procedure from the GPDO 2015, Schedule 2, Part 1, Class A and paragraph A.4, made permanent by amendment in 2019.
A process built around the 21-day consultation, which is where these schemes are won or lost.
Send us your Oldham postcode and house type. We confirm whether the property is on designated land, whether the scheme is available, and what depth you can realistically take.
We measure the original rear wall, eaves height, boundary distances and the neighbouring windows that the amenity assessment will turn on.
We draw the extension to the 6m or 8m limit with the boundary relationship shown in section, and prepare the written description and adjoining-owner details Oldham Council needs to start the consultation.
We submit, track the 21-day consultation and the 42-day determination, respond to any objection on amenity grounds, and revise free until the decision.
Three metres on a terraced or semi-detached house and four on a detached one under ordinary permitted development. Under the larger home extension prior approval scheme those double to six and eight metres, provided you notify Oldham Council before starting and the conditions on height, materials and land coverage are met. The scheme is not available on designated land.
It is a notification, not an application for permission. You tell Oldham Council what you intend to build, it writes to the adjoining owners, and they have 21 days to object. If nobody objects, you may build. If someone does, the council assesses the effect on the amenity of adjoining premises and must decide within 42 days. Design and policy are not in scope.
The council then considers the impact on the amenity of the adjoining property — loss of light, loss of outlook, and overbearing effect — and nothing else. It cannot refuse because it dislikes the design or the materials. We prepare the drawings so those three questions are already answered in section and on the site plan, which is what usually carries an objected scheme through. This applies to your Oldham address specifically. Oldham Council is the decision-maker.
No. The larger home extension scheme is unavailable on designated land, which includes conservation areas such as Uppermill and Dobcross, national landscapes, national parks and world heritage sites. On those properties the ordinary 3-metre and 4-metre limits apply, and anything deeper needs a full householder application to Oldham Council.
Twenty-one days for the neighbour consultation, and a maximum of 42 days from a valid submission for the council to determine it. If the council does not respond within 42 days you may proceed as notified. That deadline is the scheme's real advantage over a full application, and it is why validation completeness matters so much. This applies to your Oldham address specifically. Oldham Council is the decision-maker.
Yes — always. Prior approval deals only with the planning position. A 6-metre rear extension still needs building control approval for foundations, structure, drainage, thermal performance and fire safety, and the beam over the opening into the existing house needs designing and calculating. We prepare both sets so the notified scheme is the buildable one. This applies to your Oldham address specifically. Oldham Council is the decision-maker.
We quote each Oldham scheme individually, because plot shape and the boundary relationship drive the work, and send a fixed, no-obligation quote within one working day. It covers the notification pack and free revisions until Oldham Council determines it. Call 020 7864 7245 to start.
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.