The fast route to a deep single-storey rear extension in Stockport — up to 6 metres on an attached house or 8 on a detached one — via Stockport Council's prior approval scheme rather than a full planning application.
Stockport Council granted 92% of the householder planning decisions it made in its latest published year — 5 points above the 87% England-wide householder average. Because Stockport withdrew from the Places for Everyone joint plan, householder schemes are still decided against a dated 2006 UDP pending a new Local Plan, 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.
Before permission is required, Class B allows 40m³ of added loft volume on a terrace and 50m³ on a semi or detached house, and Class A allows a 3m single-storey rear extension on a terrace or 4m on a detached house. Stockport carries at least one Article 4 direction, and conservation areas including Heaton Moor, Heaton Mersey Village and Marple Bridge remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Stockport is determined against an 8-week statutory target.
Heaton Moor (Victorian and Edwardian villas in a protected conservation area), Heaton Mersey (the Heaton Mersey Village conservation area of period villas and cottages), Bramhall (affluent interwar semi-detached suburbia on leafy plots), Cheadle Hulme (interwar and postwar semis around the village core), Marple (stone-built cottages and canal-side housing on the Pennine fringe) and Reddish (dense Victorian brick terraces near the mill heritage) — these are the Stockport pockets our drawings cover most. Heritage designations here include Heaton Moor, Heaton Mersey Village, Marple Bridge, Cheadle Village, Davenport Park and Mill Brow. Stockport Council weighs each proposal against the Stockport Unitary Development Plan Review (adopted 2006) and the emerging Stockport Local Plan (Stockport is not part of the Places for Everyone joint plan), where the borough's exceptionally dense network of conservation-area Article 4 directions catches routine works — windows, rooflights, porches — that would be permitted development elsewhere. Converted villas and terraced flats are common across the Heatons and Edgeley, and flats carry no householder permitted-development rights.. On roofs the borough is gabled slate roofs on the Victorian villas and terraces, hipped roofs on the interwar semis and stone-flagged pitched roofs on the older Marple cottages, over Victorian and Edwardian villas and terraces across the Heatons, interwar semi-detached houses in Bramhall and Cheadle Hulme, stone-built cottages and terraces around Marple and Mellor and Victorian brick terraces in Reddish and Edgeley.
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 Heaton Moor and Heaton Mersey Village 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.
Stockport is largely Victorian and Edwardian villas and terraces across the Heatons, interwar semi-detached houses in Bramhall and Cheadle Hulme, stone-built cottages and terraces around Marple and Mellor and Victorian brick terraces in Reddish and Edgeley. Because Stockport withdrew from the Places for Everyone joint plan, householder schemes are still decided against a dated 2006 UDP pending a new Local Plan, which matters here because an objecting neighbour puts amenity squarely in front of a case officer. Stockport has thirty-seven conservation areas — the most in Greater Manchester — and around thirty carry Article 4 directions removing permitted-development rights on windows, doors, roofing materials, chimneys and boundary walls, with further Article 4(1) directions over Cheadle Village, Davenport Park and Mill Brow.
The scheme is available where all of these hold. Fail any one and it is a full application to Stockport Council instead:
We prepare the notification pack Stockport 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 Stockport Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Stockport grants a high share of householder applications, though its unusually broad conservation-area Article 4 coverage and an ageing development plan are the defining constraints. 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 Heaton Moor, Heaton Mersey and Bramhall, 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 borough's exceptionally dense network of conservation-area Article 4 directions catches routine works — windows, rooflights, porches — that would be permitted development elsewhere. 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 Stockport. A few of the areas where deep rear extensions come up most often:
Prior approval drawings for Heaton Moor — Victorian and Edwardian villas in a protected conservation area — dimensioned to the 6m and 8m limits and prepared for Stockport Council's neighbour consultation.
Prior approval drawings for Heaton Mersey — the Heaton Mersey Village conservation area of period villas and cottages — dimensioned to the 6m and 8m limits and prepared for Stockport Council's neighbour consultation.
Prior approval drawings for Bramhall — affluent interwar semi-detached suburbia on leafy plots — dimensioned to the 6m and 8m limits and prepared for Stockport Council's neighbour consultation.
Prior approval drawings for Cheadle Hulme — interwar and postwar semis around the village core — dimensioned to the 6m and 8m limits and prepared for Stockport Council's neighbour consultation.
Prior approval drawings for Marple — stone-built cottages and canal-side housing on the Pennine fringe — dimensioned to the 6m and 8m limits and prepared for Stockport Council's neighbour consultation.
Prior approval drawings for Reddish — dense Victorian brick terraces near the mill heritage — dimensioned to the 6m and 8m limits and prepared for Stockport 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 Stockport 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 Stockport 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 Stockport 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 Stockport 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 Stockport address specifically. Stockport Council is the decision-maker.
No. The larger home extension scheme is unavailable on designated land, which includes conservation areas such as Heaton Moor and Heaton Mersey Village, 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 Stockport 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 Stockport address specifically. Stockport 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 Stockport address specifically. Stockport Council is the decision-maker.
We quote each Stockport 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 Stockport 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.