Single-storey, double-storey, rear and side extension drawings for St James homes — measured to Exeter City Council's design guidance, delivered in days and revised free until your decision, with a free approval-odds check before you commit.
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.
St James homes come in a handful of recurring shapes, and each one points to a different extension. 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, 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. Exeter City Council judges every one of them against the Exeter Local Plan / Core Strategy and the emerging Exeter Plan, 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. 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 we design around it from the first sketch rather than discover it at validation.
St James also protects whole streets — St Sidwell's, Pennsylvania and Southernhay & The Friars among them. 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. 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 St James 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 Exeter 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 Exeter 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 Exeter City Council's real householder decision record, drawn 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. 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 Old Tiverton Road, Sidwell Street and Well Street, 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 dense victorian and edwardian terraces close to the university, a side-return infill frequently pairs with it to square off the plan; on wider red-brick terraces off old tiverton road, a two-storey side or rear extension can add a bedroom above without swallowing the garden.
The historic core and Cathedral setting mean additions visible from the walled city and Sidwell Street are assessed on heritage impact. 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 Exeter 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 St James projects come up most often:
Extension drawings for Old Tiverton Road's Victorian terraces running toward the university, heavily let to students — footprint-checked, daylight-tested and drawn to Exeter City Council's guidance.
Extension drawings for Sidwell Street's the historic approach to the city, rebuilt in part after the Blitz — footprint-checked, daylight-tested and drawn to Exeter City Council's guidance.
Extension drawings for Well Street's tightly packed Victorian terraced streets near St James Park — footprint-checked, daylight-tested and drawn to Exeter City Council's guidance.
Extension drawings for Howell Road's period terraces between the centre and the campus — footprint-checked, daylight-tested and drawn to Exeter City Council's guidance.
Extension drawings for Clifton Hill's Victorian villas and terraces on the slope east of the centre — footprint-checked, daylight-tested and drawn to Exeter City Council's guidance.
The right extension in St James 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 Exeter 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 St Sidwell's and Pennsylvania and Article 4 directions can remove permitted-development rights.
A fixed process built around how Exeter City Council validates and decides householder extension applications — most drawings are submission-ready within seven days of survey.
Tell us your St James 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 Exeter 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 Exeter 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 Exeter 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 St James you will need to apply to Exeter 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 St Sidwell's and Pennsylvania.
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 Exeter City Council and a neighbour-consultation period, and it does not apply on designated land such as St James'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 Exeter 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 St James address specifically.
A householder planning application in St James 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. Exeter 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 Exeter City Council's building control or an approved inspector can sign the work off. This applies to your St James address specifically.
Every house and brief is different, so we price each St James extension individually and send a fixed, no-obligation quote back within one working day. It covers the full drawing pack with free revisions until Exeter City Council approves, and we tell you upfront whether your extension qualifies as permitted development. Call 020 7864 7245 to get started.
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.