Back-of-house extension drawings for Stony Stratford homes — the glazed kitchen-diner across the rear, drawn to Milton Keynes City Council's depth and daylight limits, delivered in days and revised free until your decision, with a free approval-odds check first.
Milton Keynes City Council granted 92% of the householder planning decisions it made in its latest published year — 1.7000000000000028 points above the 90.3% England-wide householder average. The Watling Street/High Street frontage is one of the borough's oldest streetscapes, so extensions and shopfront-facing alterations are held to the conservation-area character, which is where a policy-literate drawing pack earns its keep. Its dominant Georgian (1714–1837), Victorian (1837–1901) and Edwardian (1901–1910) 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. In conservation areas such as Stony Stratford and Calverton those rights are removed, so we confirm your exact address before a line is drawn. A validated householder application in Stony Stratford is determined against an 8-week statutory target.
Stony Stratford High Street (Georgian coaching inns and market-town frontages inside the conservation area), Calverton (a small historic village and conservation area on the town's edge), Fullers Slade (an early-1970s grid-square estate of low-rise family housing), Galley Hill (1970s New Town housing north of the old town), Wolverton Road (Victorian and Edwardian terraces linking towards Wolverton) and Cofferidge Close (later infill housing behind the historic High Street) — these are the Stony Stratford pockets our drawings cover most. Heritage designations here include Stony Stratford and Calverton. Milton Keynes City Council weighs each proposal against Plan:MK (the Milton Keynes Local Plan 2019), where Stony Stratford is a historic town predating the 1967 New Town, sitting outside the grid-road system that governs most Milton Keynes development. On roofs the borough is pitched slate and clay-tile roofs on the historic core and hipped and gabled roofs on the modern estates, over Georgian and Victorian coaching-town frontages along the High Street, Victorian and Edwardian terraces on the side streets and 1970s grid-square estate housing on the fringes.
The rear extension is the workhorse of Stony Stratford home improvement — it is how a dark back kitchen becomes an open family room facing the garden. Because the borough is built largely from Georgian and Victorian coaching-town frontages along the High Street, Victorian and Edwardian terraces on the side streets and 1970s grid-square estate housing on the fringes, most back walls sit close to a neighbour on at least one side, and that proximity, not the design, is what Milton Keynes City Council scrutinises. The council reads the proposal against Plan:MK (the Milton Keynes Local Plan 2019), 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. The Watling Street/High Street frontage is one of the borough's oldest streetscapes, so extensions and shopfront-facing alterations are held to the conservation-area character, so the rear elevation is composed around it rather than corrected after an objection.
Where the property sits in a conservation area — Stony Stratford and Calverton among Stony Stratford's — the larger-home extension route is switched off and even a modest rear addition needs consent. No residential Article 4 direction covers Stony Stratford, so permitted-development rights survive outside the conservation area, but within the Stony Stratford conservation area — the historic Watling Street coaching town — the usual conservation controls on frontages and materials apply. We confirm the designation before the survey.
Many single-storey rear extensions in Stony Stratford are permitted development and need no application. You will normally need to apply to Milton Keynes City 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 Milton Keynes City 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 Milton Keynes City Council's real householder decision record, taken from official planning statistics and refreshed as new data lands. Milton Keynes approves the clear majority of householder applications, but in Stony Stratford the conservation-area frontage controls are the decisive constraint on street-facing work. 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 Stony Stratford High Street, Calverton and Fullers Slade, 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 georgian and victorian coaching-town frontages along the high street, 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.
Stony Stratford is a historic town predating the 1967 New Town, sitting outside the grid-road system that governs most Milton Keynes development. We keep the extension inside the daylight splays, set any glazed roof below the first-floor cill, and retain the garden depth Milton Keynes City 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 Stony Stratford back-of-house projects come up most often:
Rear extension drawings for Stony Stratford High Street's Georgian coaching inns and market-town frontages inside the conservation area — depth-checked, daylight-tested and drawn to Milton Keynes City Council's guidance.
Rear extension drawings for Calverton's a small historic village and conservation area on the town's edge — depth-checked, daylight-tested and drawn to Milton Keynes City Council's guidance.
Rear extension drawings for Fullers Slade's an early-1970s grid-square estate of low-rise family housing — depth-checked, daylight-tested and drawn to Milton Keynes City Council's guidance.
Rear extension drawings for Galley Hill's 1970s New Town housing north of the old town — depth-checked, daylight-tested and drawn to Milton Keynes City Council's guidance.
Rear extension drawings for Wolverton Road's Victorian and Edwardian terraces linking towards Wolverton — depth-checked, daylight-tested and drawn to Milton Keynes City Council's guidance.
Rear extension drawings for Cofferidge Close's later infill housing behind the historic High Street — depth-checked, daylight-tested and drawn to Milton Keynes City Council's guidance.
How far you can extend at the back in Stony Stratford depends on your house type and the route you take. This is how the options compare.
| Route | Depth allowed | Consent needed | What Milton Keynes City 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 Stony Stratford and Calverton and Article 4 streets need a full application.
A fixed process built around how Milton Keynes City Council validates and decides rear-extension applications — most drawings are submission-ready within seven days of survey.
Send us your Stony Stratford 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 Milton Keynes City 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 Milton Keynes City 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 Milton Keynes City 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 Stony Stratford. You will need to involve Milton Keynes City 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 Stony Stratford and Calverton, 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 Milton Keynes City 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 Stony Stratford's conservation areas.
It is the daylight test Milton Keynes City 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. This applies to your Stony Stratford address specifically.
A two-storey rear extension almost always needs a full householder application to Milton Keynes City 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. This applies to your Stony Stratford address specifically.
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 Milton Keynes City Council's planning decision. We flag it early and can prepare the drawings a party-wall surveyor needs alongside the planning set. This applies to your Stony Stratford address specifically.
We price each Stony Stratford 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 Milton Keynes City 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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