Two-storey extension drawings for St Leonard's homes — bedroom above, living space below, drawn against the 3-metre projection and 7-metre boundary rules and to Exeter City Council's design guidance, delivered in days and revised free until your decision.
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. The historic core and Cathedral setting are tightly protected, and heritage impact is weighed on schemes visible from Southernhay and the walled city, which is where a policy-literate drawing pack earns its keep. Its dominant Georgian (1714–1837) and Victorian (1837–1901) 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. In conservation areas such as St Leonard's, Mount Radford and Southernhay & The Friars those rights are removed, so we confirm your exact address before a line is drawn. A validated householder application in St Leonard's is determined against an 8-week statutory target.
Southernhay (elegant Georgian brick terraces facing the tree-lined lawns), Mount Radford (Regency and early-Victorian villas around St Leonard's Road), Baring Crescent (a listed early-Victorian crescent off Magdalen Road), Wonford Road (large detached Victorian villas on generous plots) and Barnfield (Georgian and Victorian terraces near Southernhay and the theatre) — these are the St Leonard's pockets our drawings cover most. Heritage designations here include St Leonard's, Mount Radford and Southernhay & The Friars. Exeter City Council weighs each proposal against the Exeter Local Plan / Core Strategy and the emerging Exeter Plan, where conservation-area frontages here are held to detailed standards on materials, render, windows and boundary walls. Many of the larger St Leonard's villas are subdivided into flats and maisonettes, which carry no householder permitted-development rights.. On roofs the borough is parapet-concealed slate roofs on the Georgian terraces and hipped and gabled Welsh-slate roofs on the Victorian villas, over Georgian and Regency terraces around Southernhay and Barnfield, substantial Victorian villas in local red breccia and brick and period houses subdivided into flats.
Adding at first floor changes the question the case officer asks. A single-storey extension is judged mostly on daylight and garden loss; a two-storey extension is judged on overlooking, bulk against the neighbouring roofline, and whether it reads as part of the house or bolted onto it. St Leonard's is largely Georgian and Regency terraces around Southernhay and Barnfield, substantial Victorian villas in local red breccia and brick and period houses subdivided into flats, and parapet-concealed slate roofs on the Georgian terraces and hipped and gabled Welsh-slate roofs on the Victorian villas set what a matching roof actually means here.
The permitted-development route exists but is narrow: 3 metres of rear projection, a 7-metre stand-off from the rear boundary, eaves and ridge no higher than the original, and side-facing upper windows obscure-glazed and non-opening below 1.7 metres above floor level. Most two-storey schemes fail one of those, usually the 7-metre boundary rule on a shorter garden, and go in as a full application instead. We establish which route applies before designing, because it changes the drawing set.
The historic core and Cathedral setting are tightly protected, and heritage impact is weighed on schemes visible from Southernhay and the walled city. St Leonard's sits outside the city's HMO Article 4 Direction, which is drawn around the student belt north of the centre, but the St Leonard's, Mount Radford and Southernhay & The Friars conservation areas remove or restrict permitted-development rights across most of its Georgian and Victorian streets.
Some two-storey rear extensions are permitted development. You will need a full application to Exeter City Council if any of these apply:
We set the projection and boundary distance on the site plan, prove the roof-pitch match on the elevations, and specify obscure glazing on the side windows — the three things Exeter City Council checks first — then submit a validation-complete pack.
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 conservation-area design control across St Leonard's and Southernhay the recurring constraint on roof, rear and frontage changes. Two-storey schemes attract more neighbour comment than any other householder work, so the overlooking and daylight case has to be made on the drawings.
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 Southernhay, Mount Radford and Baring Crescent, the schemes that succeed set the first floor back from the ground floor, keep the ridge below the original, and treat the flank wall as blank or obscure-glazed. On georgian and regency terraces around southernhay and barnfield, matching the eaves line matters more than matching the brick: an extension that carries the existing eaves through reads as original even in a different material.
Conservation-area frontages here are held to detailed standards on materials, render, windows and boundary walls. We draw the 45-degree daylight test from the neighbour's nearest habitable window, show the window positions in section, and set out the steel and foundation implications early — a two-storey extension changes the load path, so the structural design and the planning design have to be developed together rather than in sequence.
We draw two-storey extensions across St Leonard's. A few of the areas where they come up most often:
Two storey extension drawings for Southernhay — elegant Georgian brick terraces facing the tree-lined lawns — dimensioned against the 3m and 7m limits and drawn to Exeter City Council's guidance.
Two storey extension drawings for Mount Radford — Regency and early-Victorian villas around St Leonard's Road — dimensioned against the 3m and 7m limits and drawn to Exeter City Council's guidance.
Two storey extension drawings for Baring Crescent — a listed early-Victorian crescent off Magdalen Road — dimensioned against the 3m and 7m limits and drawn to Exeter City Council's guidance.
Two storey extension drawings for Wonford Road — large detached Victorian villas on generous plots — dimensioned against the 3m and 7m limits and drawn to Exeter City Council's guidance.
Two storey extension drawings for Barnfield — Georgian and Victorian terraces near Southernhay and the theatre — dimensioned against the 3m and 7m limits and drawn to Exeter City Council's guidance.
The first-floor limits are tighter than the ground-floor ones. This is how the common cases compare.
| Scheme | Permitted development? | Deciding limit | What Exeter City Council checks |
|---|---|---|---|
| Two-storey rear, 3m projection, 7m+ to boundary | Often yes | 3m projection / 7m boundary | Roof match, side-window glazing |
| Two-storey rear, under 7m to boundary | No — full application | Rear-boundary distance | Overlooking, daylight, garden loss |
| Two-storey side extension | No — full application | Side elevation | Gap to boundary, street rhythm |
| Two-storey wraparound | No — full application | Combined footprint | Bulk, massing, neighbour amenity |
| Any two-storey on designated land | No — full application | Designation | Character and appearance |
Limits from the GPDO 2015, Schedule 2, Part 1, Class A — two-storey rear extension conditions.
A fixed process built around how Exeter City Council validates and decides two-storey applications.
Send us your St Leonard's postcode and garden depth. We measure the 7-metre boundary rule against your plot, confirm designation status, and score your odds against live Exeter City Council decisions.
We measure the original rear wall, eaves and ridge heights, garden depth and every neighbouring window that faces the site — the inputs the daylight and overlooking case is built from.
Chartered designers develop the two-storey addition to your brief with the roof and eaves resolved, and we coordinate the load path so the structural scheme and the planning scheme are the same building.
We submit the application, manage validation and case-officer queries, and revise the drawings free until Exeter City Council issues its decision.
Often, but not always. A two-storey rear extension can be permitted development if it projects no more than 3 metres, sits at least 7 metres from the rear boundary, does not exceed the existing eaves and ridge, and has obscure-glazed non-opening side windows below 1.7 metres. In St Leonard's, the 7-metre rule is what most commonly forces a full application to Exeter City Council.
No part of a permitted-development two-storey rear extension may come within 7 metres of the boundary opposite the rear wall of the house. It exists to protect the neighbour behind you from being overlooked at first floor. On shorter St Leonard's gardens this is decisive, and we measure it on survey before any design work rather than discovering it at validation. Exeter City Council is the decision-maker.
Not under permitted development — two-storey side extensions always need a full application to Exeter City Council. They are assessed on the gap to the boundary, whether the street's rhythm of spaces between houses survives, and whether the extension is subordinate to the original. Setting the first floor back from the front building line and down from the ridge is what usually makes the difference. This applies to your St Leonard's address specifically.
Overlooking is the most common objection, and it is answerable on the drawings. We position habitable-room windows away from neighbouring gardens, obscure-glaze and fix shut anything on the flank below 1.7 metres, and show the sight lines in section. Where the geometry is tight, a rooflight or a high-level window gives the same daylight without the mutual overlooking that draws objections. This applies to your St Leonard's address specifically. Exeter City Council is the decision-maker.
Almost certainly. Excavating within 3 metres of a neighbouring structure and building on or up to the boundary both trigger the Party Wall etc. Act 1996, and a two-storey extension usually does both. It is entirely separate from Exeter City Council's planning decision, so we flag the notice period early and detail the junction on the drawings. This applies to your St Leonard's address specifically.
Yes. Adding a floor changes the load path from roof to foundation, so beams, padstones and foundation depths all need designing and calculating for building control. Planning and building regulations are separate consents, and the structural set is what building control assesses — we prepare both so the approved scheme is the buildable one. This applies to your St Leonard's address specifically. Exeter City Council is the decision-maker.
We quote each St Leonard's two-storey extension individually, because plot depth, roof form and structural complexity vary house to house, and send a fixed, no-obligation quote within one working day. It covers the drawing pack with free revisions until Exeter City Council approves. Call 020 7864 7245 to start.
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.