Single-storey, double-storey, rear and side extension drawings for St David's 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 under the Article 4 Direction and HMO SPD is a leading pressure in the streets nearest the university, 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.
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. St David's carries at least one Article 4 direction, and conservation areas including St David's, Taddyforde and Riverside remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in St David's is determined against an 8-week statutory target.
St David's Hill (Victorian terraces and villas climbing from the river toward Pennsylvania), Longbrook (an early suburb of period terraces north of the centre), Taddyforde (a compact estate of listed Victorian villas off New North Road), Bonhay Road (riverside streets beside the Exe and St David's station) and Hele Road (period terraces heavily let to students near the campus) — these are the St David's pockets our drawings cover most. Heritage designations here include St David's, Taddyforde and Riverside. Exeter City Council weighs each proposal against the Exeter Local Plan / Core Strategy and the emerging Exeter Plan, where the River Exe floodplain runs along Bonhay Road and the station, so flood risk and drainage are central to riverside schemes. Converted flats and student HMOs are common through St David's terraces and hold no householder permitted-development rights.. On roofs the borough is gabled Welsh-slate roofs on the terraces and hipped slate roofs on the villas, over Victorian and Edwardian terraces and villas around St David's station, listed Victorian villas on the Taddyforde estate and period houses converted to student flats and HMOs.
St David's homes come in a handful of recurring shapes, and each one points to a different extension. The borough is built largely from Victorian and Edwardian terraces and villas around St David's station, listed Victorian villas on the Taddyforde estate and period houses converted to student flats and HMOs, 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 under the Article 4 Direction and HMO SPD is a leading pressure in the streets nearest the university, so we design around it from the first sketch rather than discover it at validation.
St David's also protects whole streets — St David's, Taddyforde and Riverside among them. Part of St David's falls within the city's HMO Article 4 Direction near the university, so converting a house to a small (C4) HMO needs planning permission, and the St David's/Longbrook, Taddyforde and Riverside conservation areas remove permitted-development rights across most of its Victorian streets. 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 David's 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, with HMO management near the university and Exe floodplain drainage the main constraints across St David's. 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 St David's Hill, Longbrook and Taddyforde, 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 victorian and edwardian terraces and villas around st david's station, a side-return infill frequently pairs with it to square off the plan; on wider period houses converted to student flats and hmos, a two-storey side or rear extension can add a bedroom above without swallowing the garden.
The River Exe floodplain runs along Bonhay Road and the station, so flood risk and drainage are central to riverside schemes. 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 David's projects come up most often:
Extension drawings for St David's Hill's Victorian terraces and villas climbing from the river toward Pennsylvania — footprint-checked, daylight-tested and drawn to Exeter City Council's guidance.
Extension drawings for Longbrook's an early suburb of period terraces north of the centre — footprint-checked, daylight-tested and drawn to Exeter City Council's guidance.
Extension drawings for Taddyforde's a compact estate of listed Victorian villas off New North Road — footprint-checked, daylight-tested and drawn to Exeter City Council's guidance.
Extension drawings for Bonhay Road's riverside streets beside the Exe and St David's station — footprint-checked, daylight-tested and drawn to Exeter City Council's guidance.
Extension drawings for Hele Road's period terraces heavily let to students near the campus — footprint-checked, daylight-tested and drawn to Exeter City Council's guidance.
The right extension in St David's 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 David's and Taddyforde 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 David's 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 David's 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 David's and Taddyforde.
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 David's'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 David's address specifically.
A householder planning application in St David's 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 David's address specifically.
Every house and brief is different, so we price each St David's 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.