Back-of-house extension drawings for Iffley homes — the glazed kitchen-diner across the rear, drawn to Oxford City Council's depth and daylight limits, delivered in days and revised free until your decision, with a free approval-odds check first.
Oxford City Council granted 87% of the householder planning decisions it made in its latest published year — level with the 87% England-wide householder average. Iffley village's stone vernacular and its setting above the Isis are tightly protected, so materials, height and boundary walls are all closely controlled, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901), 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. Iffley carries at least one Article 4 direction, and conservation areas including Iffley and St Clement's and Iffley Road remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Iffley is determined against an 8-week statutory target.
Iffley Village (an ancient village on a rocky promontory above the Isis, with the celebrated Norman church of St Mary), Iffley Road (a Victorian middle-class suburb of higher-class housing taking advantage of open views), Iffley Turn (the junction where the village meets the ring-road edge of the city), Rose Hill fringe (20th-century housing on the higher ground east of the village), Donnington (interwar and postwar streets between Iffley Road and the river) and Meadow Lane (riverside plots between the village and the Isis) — these are the Iffley pockets our drawings cover most. Heritage designations here include Iffley and St Clement's and Iffley Road. Oxford City Council weighs each proposal against the Oxford Local Plan 2036, where the St Clement's and Iffley Road conservation area guards a Victorian suburban roofscape and mature street trees along the approach into the city. Victorian houses along the Iffley Road are widely subdivided into flats and student lets, which hold no householder permitted-development rights.. On roofs the borough is steep stone-tiled and slate gabled roofs on the village houses and hipped and gabled roofs on the Victorian Iffley Road villas, over stone cottages and houses in the ancient village on the Isis, middle-class Victorian villas and terraces along the Iffley Road and converted period flats and student lets toward East Oxford.
The rear extension is the workhorse of Iffley home improvement — it is how a dark back kitchen becomes an open family room facing the garden. Because the borough is built largely from stone cottages and houses in the ancient village on the Isis, middle-class Victorian villas and terraces along the Iffley Road and converted period flats and student lets toward East Oxford, most back walls sit close to a neighbour on at least one side, and that proximity, not the design, is what Oxford City Council scrutinises. The council reads the proposal against the Oxford Local Plan 2036, 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. Iffley village's stone vernacular and its setting above the Isis are tightly protected, so materials, height and boundary walls are all closely controlled, so the rear elevation is composed around it rather than corrected after an objection.
Where the property sits in a conservation area — Iffley and St Clement's and Iffley Road among Iffley's — the larger-home extension route is switched off and even a modest rear addition needs consent. Oxford operates a city-wide Article 4 direction (in force since 25 February 2012) that removes the permitted right to change a family home into a small C4 house in multiple occupation, so an HMO conversion anywhere in the city needs planning permission — and the conservation areas layer further controls on frontages, roofs and windows on top. We confirm the designation before the survey.
Many single-storey rear extensions in Iffley are permitted development and need no application. You will normally need to apply to Oxford 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 Oxford 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 Oxford City Council's real householder decision record, taken from official planning statistics and refreshed as new data lands. Oxford grants around 87% of the applications it decides, and in Iffley the split between a protected stone village and a Victorian suburb shapes very different design tests across the district. 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 Iffley Village, Iffley Road and Iffley Turn, 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 stone cottages and houses in the ancient village on the isis, 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 St Clement's and Iffley Road conservation area guards a Victorian suburban roofscape and mature street trees along the approach into the city. We keep the extension inside the daylight splays, set any glazed roof below the first-floor cill, and retain the garden depth Oxford 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 Iffley back-of-house projects come up most often:
Rear extension drawings for Iffley Village's an ancient village on a rocky promontory above the Isis, with the celebrated Norman church of St Mary — depth-checked, daylight-tested and drawn to Oxford City Council's guidance.
Rear extension drawings for Iffley Road's a Victorian middle-class suburb of higher-class housing taking advantage of open views — depth-checked, daylight-tested and drawn to Oxford City Council's guidance.
Rear extension drawings for Iffley Turn's the junction where the village meets the ring-road edge of the city — depth-checked, daylight-tested and drawn to Oxford City Council's guidance.
Rear extension drawings for Rose Hill fringe's 20th-century housing on the higher ground east of the village — depth-checked, daylight-tested and drawn to Oxford City Council's guidance.
Rear extension drawings for Donnington's interwar and postwar streets between Iffley Road and the river — depth-checked, daylight-tested and drawn to Oxford City Council's guidance.
Rear extension drawings for Meadow Lane's riverside plots between the village and the Isis — depth-checked, daylight-tested and drawn to Oxford City Council's guidance.
How far you can extend at the back in Iffley depends on your house type and the route you take. This is how the options compare.
| Route | Depth allowed | Consent needed | What Oxford 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 Iffley and St Clement's and Iffley Road and Article 4 streets need a full application.
A fixed process built around how Oxford City Council validates and decides rear-extension applications — most drawings are submission-ready within seven days of survey.
Send us your Iffley 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 Oxford 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 Oxford 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 Oxford 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 Iffley. You will need to involve Oxford 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 Iffley and St Clement's and Iffley Road, 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 Oxford 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 Iffley's conservation areas.
It is the daylight test Oxford 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 Iffley address specifically.
A two-storey rear extension almost always needs a full householder application to Oxford 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 Iffley 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 Oxford 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 Iffley address specifically.
We price each Iffley 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 Oxford 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.
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.