Back-of-house extension drawings for Friar Gate homes — the glazed kitchen-diner across the rear, drawn to Derby City Council's depth and daylight limits, delivered in days and revised free until your decision, with a free approval-odds check first.
Derby City Council granted 93% of the householder planning decisions it made in its latest published year — 6 points above the 87% England-wide householder average. Georgian frontages, railings and window proportions on Friar Gate are held to conservation-area detail, so replacement joinery and roof additions are scrutinised closely, 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.
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 Derby City Council needs a full application. Friar Gate carries at least one Article 4 direction, and conservation areas including Friar Gate, City Centre and Railway remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Friar Gate is determined against an 8-week statutory target.
Friar Gate (one of the finest Georgian streets in the Midlands, lined with brick townhouses and professional offices), Cathedral Quarter (the historic city-centre core around Derby Cathedral and Iron Gate), The Wardwick (Victorian civic and commercial frontages close to Friar Gate), Vernon Street (a formal Georgian-Regency terrace beside the old county gaol), Ashbourne Road (Victorian townhouses and terraces running west from Friar Gate) and Bridge Street (mixed period terraces linking the centre to the Strutts Park corridor) — these are the Friar Gate pockets our drawings cover most. Heritage designations here include Friar Gate, City Centre and Railway. Derby City Council weighs each proposal against the Derby City Local Plan Part 1 (Core Strategy) and Part 2, where many townhouses are already in office or flat use, so change-of-use and subdivision schemes must satisfy amenity, refuse and cycle-storage policy. Many Friar Gate and city-centre townhouses have been converted to flats or offices, and converted flats carry no householder permitted-development rights.. On roofs the borough is parapet-concealed and shallow pitched roofs on the Georgian townhouses and gabled and hipped slate roofs on the Victorian terraces, over Georgian and early-Victorian brick townhouses along Friar Gate, Victorian terraces around the city centre and converted period offices and townhouses split into flats and apartments.
The rear extension is the workhorse of Friar Gate home improvement — it is how a dark back kitchen becomes an open family room facing the garden. Because the borough is built largely from Georgian and early-Victorian brick townhouses along Friar Gate, Victorian terraces around the city centre and converted period offices and townhouses split into flats and apartments, most back walls sit close to a neighbour on at least one side, and that proximity, not the design, is what Derby City Council scrutinises. The council reads the proposal against the Derby City Local Plan Part 1 (Core Strategy) and Part 2, 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. Georgian frontages, railings and window proportions on Friar Gate are held to conservation-area detail, so replacement joinery and roof additions are scrutinised closely, so the rear elevation is composed around it rather than corrected after an objection.
Where the property sits in a conservation area — Friar Gate, City Centre and Railway among Friar Gate's — the larger-home extension route is switched off and even a modest rear addition needs consent. Friar Gate sits inside the Ring Road within Abbey Ward, so Derby's HMO Article 4 direction (in force from 3 May 2025) removes the permitted right to convert family homes to small shared houses, and the Friar Gate conservation area layers further control over its Georgian frontages. We confirm the designation before the survey.
Many single-storey rear extensions in Friar Gate are permitted development and need no application. You will normally need to apply to Derby 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 Derby 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 Derby City Council's real householder decision record, taken from official planning statistics and refreshed as new data lands. Derby City Council approves the large majority of applications it decides, and in Friar Gate the recurring pressure points are conservation-area detailing and the HMO Article 4 controls on subdivision. 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 Friar Gate, Cathedral Quarter and The Wardwick, 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 georgian and early-victorian brick townhouses along friar gate, 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.
Many townhouses are already in office or flat use, so change-of-use and subdivision schemes must satisfy amenity, refuse and cycle-storage policy. We keep the extension inside the daylight splays, set any glazed roof below the first-floor cill, and retain the garden depth Derby 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 Friar Gate back-of-house projects come up most often:
Rear extension drawings for Friar Gate's one of the finest Georgian streets in the Midlands, lined with brick townhouses and professional offices — depth-checked, daylight-tested and drawn to Derby City Council's guidance.
Rear extension drawings for Cathedral Quarter's the historic city-centre core around Derby Cathedral and Iron Gate — depth-checked, daylight-tested and drawn to Derby City Council's guidance.
Rear extension drawings for The Wardwick's Victorian civic and commercial frontages close to Friar Gate — depth-checked, daylight-tested and drawn to Derby City Council's guidance.
Rear extension drawings for Vernon Street's a formal Georgian-Regency terrace beside the old county gaol — depth-checked, daylight-tested and drawn to Derby City Council's guidance.
Rear extension drawings for Ashbourne Road's Victorian townhouses and terraces running west from Friar Gate — depth-checked, daylight-tested and drawn to Derby City Council's guidance.
Rear extension drawings for Bridge Street's mixed period terraces linking the centre to the Strutts Park corridor — depth-checked, daylight-tested and drawn to Derby City Council's guidance.
How far you can extend at the back in Friar Gate depends on your house type and the route you take. This is how the options compare.
| Route | Depth allowed | Consent needed | What Derby 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 Friar Gate and City Centre and Article 4 streets need a full application.
A fixed process built around how Derby City Council validates and decides rear-extension applications — most drawings are submission-ready within seven days of survey.
Send us your Friar Gate 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 Derby 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 Derby 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 Derby 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 Friar Gate. You will need to involve Derby 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 Friar Gate and City Centre, 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 Derby 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 Friar Gate's conservation areas.
It is the daylight test Derby 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 Friar Gate address specifically.
A two-storey rear extension almost always needs a full householder application to Derby 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 Friar Gate 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 Derby 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 Friar Gate address specifically.
We price each Friar Gate 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 Derby 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.
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.