Single-storey, double-storey, rear and side extension drawings for Iffley homes — measured to Oxford City Council's design guidance, delivered in days and revised free until your decision, with a free approval-odds check before you commit.
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.
Iffley homes come in a handful of recurring shapes, and each one points to a different extension. 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, so a Victorian terrace usually wants a rear or side-return infill, while an interwar semi has room for a wider single-storey wrap or a two-storey side addition. Oxford City Council judges every one of them against the Oxford Local Plan 2036, weighing footprint, height and the impact on the house next door before it looks at the elevations.
That is why the drawings decide the outcome. We set the extension depth against the permitted-development limits precisely, keep the eaves and ridge within the allowances, and plot the 45-degree daylight lines to the neighbours' windows so the case officer can see the amenity test is passed. 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 we design around it from the first sketch rather than discover it at validation.
Iffley also protects whole streets — Iffley and St Clement's and Iffley Road among them. 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. On designated land the larger-home extension route and most side extensions stop being permitted development, so we confirm your address against those layers before drawing a line.
Plenty of Iffley extensions are permitted development and need no planning application — a single-storey rear extension within the depth and height limits is the common case. You will normally need to apply to Oxford City Council if any of these apply:
We draw the footprint, the ridge and eaves heights and the neighbours' daylight on the page — the relationships Oxford City Council's officers weigh first — and submit a validation-complete pack, whether that is a lawful development certificate, a prior-approval notification or a full householder application.
Below is Oxford City Council's real householder decision record, drawn 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. A complete, policy-literate extension pack anticipates those pressure points before submission, which is why professionally drawn applications are decided faster and refused less often than DIY ones.
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 extension that lands most often is the single-storey rear addition — a glazed kitchen-diner across the back of the house, kept within the permitted-development depth or taken to a full application where the ground floor wants more. On the borough's stone cottages and houses in the ancient village on the isis, a side-return infill frequently pairs with it to square off the plan; on wider converted period flats and student lets toward east oxford, a two-storey side or rear extension can add a bedroom above without swallowing the garden.
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 size the extension to the amenity and daylight tests, match the roof and materials to the host house, and keep enough garden to satisfy Oxford City Council's space standards — so the scheme answers the borough's questions before an objection can raise them. Where permitted-development rights are used up or removed, we prepare the householder application to the council's extension design guidance instead.
We draw extensions on every street in the borough. A few of the neighbourhoods where Iffley projects come up most often:
Extension drawings for Iffley Village's an ancient village on a rocky promontory above the Isis, with the celebrated Norman church of St Mary — footprint-checked, daylight-tested and drawn to Oxford City Council's guidance.
Extension drawings for Iffley Road's a Victorian middle-class suburb of higher-class housing taking advantage of open views — footprint-checked, daylight-tested and drawn to Oxford City Council's guidance.
Extension drawings for Iffley Turn's the junction where the village meets the ring-road edge of the city — footprint-checked, daylight-tested and drawn to Oxford City Council's guidance.
Extension drawings for Rose Hill fringe's 20th-century housing on the higher ground east of the village — footprint-checked, daylight-tested and drawn to Oxford City Council's guidance.
Extension drawings for Donnington's interwar and postwar streets between Iffley Road and the river — footprint-checked, daylight-tested and drawn to Oxford City Council's guidance.
Extension drawings for Meadow Lane's riverside plots between the village and the Isis — footprint-checked, daylight-tested and drawn to Oxford City Council's guidance.
The right extension in Iffley depends on your house type and how much garden you can give up. This is how the main options compare on planning route and what they add.
| Extension type | Permitted development? | What it adds | What Oxford City Council checks |
|---|---|---|---|
| Single-storey rear | Often, within 3m/4m depth (6m/8m via prior approval) | Bigger kitchen-diner across the back | Depth, height, neighbour daylight (45°) |
| Side-return infill | Sometimes, if within width and height limits | Squares off an L-shaped ground floor | Width vs the original house, glazing to boundary |
| Two-storey rear/side | No — full application | Extra bedroom or bathroom above | Bulk, overlooking, 7m rear-boundary gap |
| Wraparound (rear + side) | No — full application | Whole-width open-plan ground floor | Combined footprint and garden retained |
Route depends on your street — conservation areas such as Iffley and St Clement's and Iffley Road and Article 4 directions can remove permitted-development rights.
A fixed process built around how Oxford City Council validates and decides householder extension applications — most drawings are submission-ready within seven days of survey.
Tell us your Iffley postcode and house type. We confirm your conservation and Article 4 status, how much permitted-development depth you have left, and score your odds against live Oxford City Council decisions.
We measure the existing footprint, floor and eaves levels, boundary distances and the neighbours' window positions — the numbers the depth limits and daylight tests depend on.
Chartered designers develop the single-storey, two-storey or side extension to your brief, drawn inside the permitted-development limits or to Oxford City Council's extension design guidance.
We submit the certificate, prior-approval notice or application, manage validation and case-officer queries, and revise the drawings free until Oxford City Council issues its decision.
Not always. 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 apply to Oxford City Council for two-storey extensions, side extensions wider than half the house, anything forward of the front wall, deeper rear extensions under the larger-home prior-approval route, and any extension in a conservation area such as Iffley and St Clement's and Iffley Road.
Standard permitted development allows 3 metres on a terraced or semi-detached house and 4 metres on a detached one. The larger-home extension scheme can double that to 6 or 8 metres, but it needs a prior-approval notification to Oxford City Council and a neighbour-consultation period, and it does not apply on designated land such as Iffley's conservation areas. We confirm which route your property qualifies for before drawing.
Two-storey and double-storey extensions almost always need a full householder application to Oxford City Council, because they fall outside permitted development on most homes. The council looks closely at bulk, overlooking of neighbours and the 7-metre gap a two-storey rear extension must keep from the rear boundary. We design to those tests and show the daylight and privacy angles on the drawings. This applies to your Iffley address specifically.
A householder planning application in Iffley runs to a statutory eight-week target, a larger-home prior-approval notification to around six weeks including the neighbour-consultation period, and a lawful development certificate to eight weeks. Incomplete submissions stall at validation, so we submit a complete pack and manage officer queries to keep the decision on schedule. Oxford City Council is the decision-maker.
Yes — planning permission and building regulations are separate consents, and almost every extension needs both. Planning governs whether you can build it; building control governs how it is built, covering structure, insulation, drainage and fire safety. We prepare the building-regulations drawings alongside the planning set so Oxford City Council's building control or an approved inspector can sign the work off. This applies to your Iffley address specifically.
Every house and brief is different, so we price each Iffley extension individually and send a fixed, no-obligation quote back within one working day. It covers the full drawing pack with free revisions until Oxford City Council approves, and we tell you upfront whether your extension qualifies as permitted development. Call 020 7864 7245 to get started.
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Same fixed quotes, same fast drawings — wherever your project is.