Single-storey, double-storey, rear and side extension drawings for Edgbaston homes — measured to Birmingham City Council's design guidance, delivered in days and revised free until your decision, with a free approval-odds check before you commit.
Birmingham City Council granted 84% of the householder planning decisions it made in its latest published year — 3 points below the 87% England-wide householder average. Much of the district sits within the privately managed Calthorpe Estate, whose covenants sit alongside — and sometimes ahead of — the council's own controls, which is where a policy-literate drawing pack earns its keep. Its dominant Georgian (1714–1837), 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. Edgbaston carries at least one Article 4 direction, and conservation areas including Edgbaston, Lee Crescent and Barnsley Road remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Edgbaston is determined against an 8-week statutory target.
Calthorpe Estate (Birmingham's grandest villa suburb, managed under the Calthorpe Estate scheme of covenants), Five Ways (tall Victorian terraces and later apartment blocks near the city edge), Harborne Road corridor (substantial red-brick houses, many now offices or flats), Chad Valley (large detached and semi-detached houses on leafy plots), Lee Crescent (an early-19th-century crescent within its own conservation area) and Rotton Park (Victorian and Edwardian terraces towards the reservoir) — these are the Edgbaston pockets our drawings cover most. Heritage designations here include Edgbaston, Lee Crescent, Barnsley Road and St Augustine's. Birmingham City Council weighs each proposal against Birmingham Development Plan (2017) and the Birmingham Design Guide / relevant SPDs, where the Edgbaston conservation-area appraisal polices boundary treatments, tree cover and the spacing between villas. Large villas along Hagley Road and Harborne Road are widely converted to flats and offices, and converted flats hold no householder permitted-development rights.. On roofs the borough is hipped slate roofs on the detached villas and gabled roofs on the Edwardian houses, over large Georgian and Victorian villas on the Calthorpe Estate, red-brick Edwardian mansions and mansion blocks and converted period flats and later apartment blocks.
Edgbaston homes come in a handful of recurring shapes, and each one points to a different extension. The borough is built largely from large Georgian and Victorian villas on the Calthorpe Estate, red-brick Edwardian mansions and mansion blocks and converted period flats and later apartment blocks, 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. Birmingham City Council judges every one of them against Birmingham Development Plan (2017) and the Birmingham Design Guide / relevant SPDs, 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. Much of the district sits within the privately managed Calthorpe Estate, whose covenants sit alongside — and sometimes ahead of — the council's own controls, so we design around it from the first sketch rather than discover it at validation.
Edgbaston also protects whole streets — Edgbaston, Lee Crescent, Barnsley Road and St Augustine's among them. The Edgbaston conservation area carries an Article 4(2) direction removing permitted-development rights on frontages, and Birmingham's city-wide Article 4 direction means converting a family house to a small HMO needs full planning permission across the district. 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 Edgbaston 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 Birmingham 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 Birmingham 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 Birmingham City Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Birmingham grants a high share of householder applications overall, but in Edgbaston the Calthorpe Estate covenants and conservation-area controls are the pinch points that shape most extension designs. 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 Calthorpe Estate, Five Ways and Harborne Road corridor, 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 large georgian and victorian villas on the calthorpe estate, a side-return infill frequently pairs with it to square off the plan; on wider converted period flats and later apartment blocks, a two-storey side or rear extension can add a bedroom above without swallowing the garden.
The Edgbaston conservation-area appraisal polices boundary treatments, tree cover and the spacing between villas. 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 Birmingham 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 Edgbaston projects come up most often:
Extension drawings for Calthorpe Estate's Birmingham's grandest villa suburb, managed under the Calthorpe Estate scheme of covenants — footprint-checked, daylight-tested and drawn to Birmingham City Council's guidance.
Extension drawings for Five Ways's tall Victorian terraces and later apartment blocks near the city edge — footprint-checked, daylight-tested and drawn to Birmingham City Council's guidance.
Extension drawings for Harborne Road corridor's substantial red-brick houses, many now offices or flats — footprint-checked, daylight-tested and drawn to Birmingham City Council's guidance.
Extension drawings for Chad Valley's large detached and semi-detached houses on leafy plots — footprint-checked, daylight-tested and drawn to Birmingham City Council's guidance.
Extension drawings for Lee Crescent's an early-19th-century crescent within its own conservation area — footprint-checked, daylight-tested and drawn to Birmingham City Council's guidance.
Extension drawings for Rotton Park's Victorian and Edwardian terraces towards the reservoir — footprint-checked, daylight-tested and drawn to Birmingham City Council's guidance.
The right extension in Edgbaston 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 Birmingham 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 Edgbaston and Lee Crescent and Article 4 directions can remove permitted-development rights.
A fixed process built around how Birmingham City Council validates and decides householder extension applications — most drawings are submission-ready within seven days of survey.
Tell us your Edgbaston 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 Birmingham 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 Birmingham 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 Birmingham 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 Edgbaston you will need to apply to Birmingham 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 Edgbaston and Lee Crescent.
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 Birmingham City Council and a neighbour-consultation period, and it does not apply on designated land such as Edgbaston'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 Birmingham 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 Edgbaston address specifically.
A householder planning application in Edgbaston 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. Birmingham 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 Birmingham City Council's building control or an approved inspector can sign the work off. This applies to your Edgbaston address specifically.
Every house and brief is different, so we price each Edgbaston extension individually and send a fixed, no-obligation quote back within one working day. It covers the full drawing pack with free revisions until Birmingham 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.