The fast route to a deep single-storey rear extension in Great Linford — up to 6 metres on an attached house or 8 on a detached one — via Milton Keynes City Council's prior approval scheme rather than a full planning application.
Milton Keynes City Council granted 87% of the householder planning decisions it made in its latest published year — level with the 87% England-wide householder average. The New Town grid-road and linear-park design code governs boundary treatments and landscaping across the estates, which is where a policy-literate drawing pack earns its keep. Its mixed housing stock sets the design brief street by street.
Under Class B, a rear dormer stays permitted development up to 40m³ of added roof volume on a terrace or 50m³ on a semi-detached or detached house, while Class A allows a single-storey rear extension of 3m beyond the original rear wall on a terrace and 4m on a detached house before a full application is needed. In conservation areas such as Great Linford, Loughton and Shenley Church End those rights are removed, so we confirm your exact address before a line is drawn. A validated householder application in Great Linford is determined against an 8-week statutory target.
Great Linford (a historic manorial village and conservation area beside the Grand Union Canal), Downs Barn (a 1970s grid-square estate south of the village), Conniburrow (early New Town housing near Central Milton Keynes), Bradville (one of the earliest New Town estates, built to the north), Giffard Park (1980s family housing on the northern grid) and Blakelands (later residential and employment development on the northern edge) — these are the Great Linford pockets our drawings cover most. Heritage designations here include Great Linford, Loughton and Shenley Church End. Milton Keynes City Council weighs each proposal against Plan:MK (the Milton Keynes Local Plan 2019), where Great Linford's manorial village core survives as a conservation island in the grid, with heritage controls on its cottages and the canal setting. On roofs the borough is pitched stone-slate and clay-tile roofs on the village core and gabled and hipped roofs on the modern estates, over a historic manorial village core of stone cottages around the church and canal, 1970s and 1980s grid-square estate housing and later family housing across the northern grid squares.
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 Great Linford and Loughton 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.
Great Linford is largely a historic manorial village core of stone cottages around the church and canal, 1970s and 1980s grid-square estate housing and later family housing across the northern grid squares. The New Town grid-road and linear-park design code governs boundary treatments and landscaping across the estates, which matters here because an objecting neighbour puts amenity squarely in front of a case officer. No residential Article 4 direction applies in Great Linford, so permitted-development rights remain intact outside the conservation areas, while the Great Linford, Loughton and Shenley Church End conservation areas protect the surviving historic cores.
The scheme is available where all of these hold. Fail any one and it is a full application to Milton Keynes City Council instead:
We prepare the notification pack Milton Keynes City 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 Milton Keynes City Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Milton Keynes grants most householder applications, with the grid-square design code and the Great Linford conservation core the leading constraints locally. 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 Great Linford, Downs Barn and Conniburrow, 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.
Great Linford's manorial village core survives as a conservation island in the grid, with heritage controls on its cottages and the canal setting. 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 Great Linford. A few of the areas where deep rear extensions come up most often:
Prior approval drawings for Great Linford — a historic manorial village and conservation area beside the Grand Union Canal — dimensioned to the 6m and 8m limits and prepared for Milton Keynes City Council's neighbour consultation.
Prior approval drawings for Downs Barn — a 1970s grid-square estate south of the village — dimensioned to the 6m and 8m limits and prepared for Milton Keynes City Council's neighbour consultation.
Prior approval drawings for Conniburrow — early New Town housing near Central Milton Keynes — dimensioned to the 6m and 8m limits and prepared for Milton Keynes City Council's neighbour consultation.
Prior approval drawings for Bradville — one of the earliest New Town estates, built to the north — dimensioned to the 6m and 8m limits and prepared for Milton Keynes City Council's neighbour consultation.
Prior approval drawings for Giffard Park — 1980s family housing on the northern grid — dimensioned to the 6m and 8m limits and prepared for Milton Keynes City Council's neighbour consultation.
Prior approval drawings for Blakelands — later residential and employment development on the northern edge — dimensioned to the 6m and 8m limits and prepared for Milton Keynes City 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 Great Linford 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 Milton Keynes City 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 Milton Keynes City Council before starting and the conditions on height, materials and land coverage are met. The scheme is not available on designated land. This applies to your Great Linford address specifically.
It is a notification, not an application for permission. You tell Milton Keynes City 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. This applies to your Great Linford address specifically.
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 Great Linford address specifically. Milton Keynes City Council is the decision-maker.
No. The larger home extension scheme is unavailable on designated land, which includes conservation areas such as Great Linford and Loughton, 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 Milton Keynes City 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 Great Linford address specifically. Milton Keynes City 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 Great Linford address specifically. Milton Keynes City Council is the decision-maker.
We quote each Great Linford 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 Milton Keynes City Council determines it. Call 020 7864 7245 to start.
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Same fixed quotes, same fast drawings — wherever your project is.