Back-of-house extension drawings for Jewellery Quarter homes — the glazed kitchen-diner across the rear, drawn to Birmingham City Council's depth and daylight limits, delivered in days and revised free until your decision, with a free approval-odds check first.
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. The Jewellery Quarter conservation-area appraisal resists the loss of active manufacturing floorspace to residential use, protecting the working character, which is where a policy-literate drawing pack earns its keep. Its dominant Georgian (1714–1837) housing stock sets the design brief on most streets.
Class A and Class B set the thresholds — a rear dormer to 40m³ on a terrace or 50m³ on a semi or detached, and a single-storey rear extension to 3m on a terrace or 4m on a detached house — beyond which Birmingham City Council needs a full application. Jewellery Quarter carries at least one Article 4 direction, and conservation areas including Jewellery Quarter, St Paul's Square and Key Hill and Warstone Lane Cemeteries remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Jewellery Quarter is determined against an 8-week statutory target.
St Paul's Square (Birmingham's only surviving Georgian square, framed by townhouses and workshops), Warstone Lane (workshop terraces around the tiered Church of England cemetery), Key Hill (the General Cemetery quarter with converted works and lofts), Vyse Street (the trade's retail spine of jewellers and the Museum of the Jewellery Quarter), Golden Square (a restored public square ringed by manufacturing frontages) and Hockley edge (larger former factories reworked as loft apartments) — these are the Jewellery Quarter pockets our drawings cover most. Heritage designations here include Jewellery Quarter, St Paul's Square and Key Hill and Warstone Lane Cemeteries. Birmingham City Council weighs each proposal against Birmingham Development Plan (2017) and the Birmingham Design Guide / relevant SPDs, where workshop frontages, cart entries and industrial fenestration are protected in detail, constraining conversion and roof additions. Almost all housing here is apartments in converted workshops or new blocks, none of which hold householder permitted-development rights.. On roofs the borough is pitched and parapet-fronted industrial roofs on the workshop terraces and flat and set-back roofs on modern apartment conversions, over 19th-century jewellery workshops and warehouses converted to apartments, Georgian townhouses around St Paul's Square and new-build apartment blocks on former industrial plots.
The rear extension is the workhorse of Jewellery Quarter home improvement — it is how a dark back kitchen becomes an open family room facing the garden. Because the borough is built largely from 19th-century jewellery workshops and warehouses converted to apartments, Georgian townhouses around St Paul's Square and new-build apartment blocks on former industrial plots, most back walls sit close to a neighbour on at least one side, and that proximity, not the design, is what Birmingham City Council scrutinises. The council reads the proposal against Birmingham Development Plan (2017) and the Birmingham Design Guide / relevant SPDs, 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. The Jewellery Quarter conservation-area appraisal resists the loss of active manufacturing floorspace to residential use, protecting the working character, so the rear elevation is composed around it rather than corrected after an objection.
Where the property sits in a conservation area — Jewellery Quarter, St Paul's Square and Key Hill and Warstone Lane Cemeteries among Jewellery Quarter's — the larger-home extension route is switched off and even a modest rear addition needs consent. The Jewellery Quarter conservation area — which absorbed the earlier St Paul's Square and Key Hill conservation areas in 2000 — protects the largest surviving group of Victorian jewellery workshops in Britain, so external alterations and change-of-use are tightly controlled alongside the city-wide HMO Article 4 direction. We confirm the designation before the survey.
Many single-storey rear extensions in Jewellery Quarter are permitted development and need no application. You will normally need to apply to Birmingham 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 Birmingham 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 Birmingham City Council's real householder decision record, taken from official planning statistics and refreshed as new data lands. Birmingham grants a high share of householder applications overall, but the Jewellery Quarter is dominated by conservation-led conversion and change-of-use decisions rather than typical suburban extensions. 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 St Paul's Square, Warstone Lane and Key Hill, 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 19th-century jewellery workshops and warehouses converted to apartments, 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.
Workshop frontages, cart entries and industrial fenestration are protected in detail, constraining conversion and roof additions. We keep the extension inside the daylight splays, set any glazed roof below the first-floor cill, and retain the garden depth Birmingham 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 Jewellery Quarter back-of-house projects come up most often:
Rear extension drawings for St Paul's Square's Birmingham's only surviving Georgian square, framed by townhouses and workshops — depth-checked, daylight-tested and drawn to Birmingham City Council's guidance.
Rear extension drawings for Warstone Lane's workshop terraces around the tiered Church of England cemetery — depth-checked, daylight-tested and drawn to Birmingham City Council's guidance.
Rear extension drawings for Key Hill's the General Cemetery quarter with converted works and lofts — depth-checked, daylight-tested and drawn to Birmingham City Council's guidance.
Rear extension drawings for Vyse Street's the trade's retail spine of jewellers and the Museum of the Jewellery Quarter — depth-checked, daylight-tested and drawn to Birmingham City Council's guidance.
Rear extension drawings for Golden Square's a restored public square ringed by manufacturing frontages — depth-checked, daylight-tested and drawn to Birmingham City Council's guidance.
Rear extension drawings for Hockley edge's larger former factories reworked as loft apartments — depth-checked, daylight-tested and drawn to Birmingham City Council's guidance.
How far you can extend at the back in Jewellery Quarter depends on your house type and the route you take. This is how the options compare.
| Route | Depth allowed | Consent needed | What Birmingham 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 Jewellery Quarter and St Paul's Square and Article 4 streets need a full application.
A fixed process built around how Birmingham City Council validates and decides rear-extension applications — most drawings are submission-ready within seven days of survey.
Send us your Jewellery Quarter 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 Birmingham 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 Birmingham 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 Birmingham 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 Jewellery Quarter. You will need to involve Birmingham 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 Jewellery Quarter and St Paul's Square, 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 Birmingham 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 Jewellery Quarter's conservation areas.
It is the daylight test Birmingham 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 Jewellery Quarter address specifically.
A two-storey rear extension almost always needs a full householder application to Birmingham 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 Jewellery Quarter 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 Birmingham 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 Jewellery Quarter address specifically.
We price each Jewellery Quarter 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 Birmingham 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.
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