Back-of-house extension drawings for St James homes — the glazed kitchen-diner across the rear, drawn to Exeter City Council's depth and daylight limits, delivered in days and revised free until your decision, with a free approval-odds check first.
Exeter City Council granted 87% of the householder planning decisions it made in its latest published year — level with the 87% England-wide householder average. Student HMO management dominates policy here, with the HMO SPD and Article 4 Direction resisting further loss of family housing next to the Streatham Campus, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901) and Edwardian (1901–1910) housing stock sets the design brief on most streets.
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. St James carries at least one Article 4 direction, and conservation areas including St Sidwell's, Pennsylvania and Southernhay & The Friars remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in St James is determined against an 8-week statutory target.
Old Tiverton Road (Victorian terraces running toward the university, heavily let to students), Sidwell Street (the historic approach to the city, rebuilt in part after the Blitz), Well Street (tightly packed Victorian terraced streets near St James Park), Howell Road (period terraces between the centre and the campus) and Clifton Hill (Victorian villas and terraces on the slope east of the centre) — these are the St James pockets our drawings cover most. Heritage designations here include St Sidwell's, Pennsylvania and Southernhay & The Friars. Exeter City Council weighs each proposal against the Exeter Local Plan / Core Strategy and the emerging Exeter Plan, where the historic core and Cathedral setting mean additions visible from the walled city and Sidwell Street are assessed on heritage impact. A large share of St James stock is converted flats and student HMOs, none of which hold householder permitted-development rights.. On roofs the borough is gabled Welsh-slate roofs on the terraces and slate roofs behind parapets on the older streets, over dense Victorian and Edwardian terraces close to the university, period houses widely converted to student HMOs and flats and red-brick terraces off Old Tiverton Road.
The rear extension is the workhorse of St James home improvement — it is how a dark back kitchen becomes an open family room facing the garden. Because the borough is built largely from dense Victorian and Edwardian terraces close to the university, period houses widely converted to student HMOs and flats and red-brick terraces off Old Tiverton Road, most back walls sit close to a neighbour on at least one side, and that proximity, not the design, is what Exeter City Council scrutinises. The council reads the proposal against the Exeter Local Plan / Core Strategy and the emerging Exeter Plan, 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. Student HMO management dominates policy here, with the HMO SPD and Article 4 Direction resisting further loss of family housing next to the Streatham Campus, so the rear elevation is composed around it rather than corrected after an objection.
Where the property sits in a conservation area — St Sidwell's, Pennsylvania and Southernhay & The Friars among St James's — the larger-home extension route is switched off and even a modest rear addition needs consent. St James is at the core of the city's HMO Article 4 Direction — a 2010 petition from 772 residents triggered it — so converting a family home to a small (C4) HMO here needs planning permission, and the adjoining St Sidwell's and Pennsylvania conservation areas add further control. We confirm the designation before the survey.
Many single-storey rear extensions in St James are permitted development and need no application. You will normally need to apply to Exeter 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 Exeter 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 Exeter City Council's real householder decision record, taken from official planning statistics and refreshed as new data lands. Exeter grants around 87% of the applications it decides, though intense student-HMO demand meeting the Article 4 Direction is the defining tension across St James. 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 Old Tiverton Road, Sidwell Street and Well Street, 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 dense victorian and edwardian terraces close to the university, 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 historic core and Cathedral setting mean additions visible from the walled city and Sidwell Street are assessed on heritage impact. We keep the extension inside the daylight splays, set any glazed roof below the first-floor cill, and retain the garden depth Exeter 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 St James back-of-house projects come up most often:
Rear extension drawings for Old Tiverton Road's Victorian terraces running toward the university, heavily let to students — depth-checked, daylight-tested and drawn to Exeter City Council's guidance.
Rear extension drawings for Sidwell Street's the historic approach to the city, rebuilt in part after the Blitz — depth-checked, daylight-tested and drawn to Exeter City Council's guidance.
Rear extension drawings for Well Street's tightly packed Victorian terraced streets near St James Park — depth-checked, daylight-tested and drawn to Exeter City Council's guidance.
Rear extension drawings for Howell Road's period terraces between the centre and the campus — depth-checked, daylight-tested and drawn to Exeter City Council's guidance.
Rear extension drawings for Clifton Hill's Victorian villas and terraces on the slope east of the centre — depth-checked, daylight-tested and drawn to Exeter City Council's guidance.
How far you can extend at the back in St James depends on your house type and the route you take. This is how the options compare.
| Route | Depth allowed | Consent needed | What Exeter 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 St Sidwell's and Pennsylvania and Article 4 streets need a full application.
A fixed process built around how Exeter City Council validates and decides rear-extension applications — most drawings are submission-ready within seven days of survey.
Send us your St James 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 Exeter 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 Exeter 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 Exeter 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 St James. You will need to involve Exeter 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 St Sidwell's and Pennsylvania, 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 Exeter 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 St James's conservation areas.
It is the daylight test Exeter 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 St James address specifically.
A two-storey rear extension almost always needs a full householder application to Exeter 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 St James 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 Exeter 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 St James address specifically.
We price each St James 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 Exeter 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.