Single-storey, double-storey, rear and side extension drawings for Acomb homes — measured to City of York Council's design guidance, delivered in days and revised free until your decision, with a free approval-odds check before you commit.
City of York Council granted 90% of the householder planning decisions it made in its latest published year — 3 points above the 87% England-wide householder average. The historic village green and building line in the conservation area constrain frontage changes and infill near Acomb Green, which is where a policy-literate drawing pack earns its keep. Its dominant Edwardian (1901–1910), interwar (1918–1939) and postwar (1945–1970) 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 City of York Council needs a full application. Acomb carries at least one Article 4 direction, and conservation areas including Acomb, St Paul's Square / Holgate Road and Upper Poppleton remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Acomb is determined against an 8-week statutory target.
Acomb Village (historic cottages and church around the green in the conservation area), Front Street (the suburb's traditional shopping street with flats over shops), Chapelfields (postwar semi-detached suburban housing to the west), Westfield (interwar and postwar estate housing on generous plots) and Hob Moor (housing edging the protected Hob Moor common land) — these are the Acomb pockets our drawings cover most. Heritage designations here include Acomb, St Paul's Square / Holgate Road and Upper Poppleton. City of York Council weighs each proposal against the City of York Local Plan (adopted 2024) and the Acomb conservation area appraisal, where generous interwar plots make rear and side extensions viable, but officers guard the spacing and building lines of paired semis. On roofs the borough is pitched and pantiled roofs on the village core and hipped roofs on the interwar semis, over historic village-core cottages around Acomb Green, interwar and postwar semi-detached houses and Edwardian terraces linking Acomb to Holgate.
Acomb homes come in a handful of recurring shapes, and each one points to a different extension. The borough is built largely from historic village-core cottages around Acomb Green, interwar and postwar semi-detached houses and Edwardian terraces linking Acomb to Holgate, 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. City of York Council judges every one of them against the City of York Local Plan (adopted 2024) and the Acomb conservation area appraisal, 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. The historic village green and building line in the conservation area constrain frontage changes and infill near Acomb Green, so we design around it from the first sketch rather than discover it at validation.
Acomb also protects whole streets — Acomb, St Paul's Square / Holgate Road and Upper Poppleton among them. The Acomb conservation area protects the historic village green and church, and York's citywide Article 4 direction requires planning permission for any change of use to an HMO across the wider suburb. 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 Acomb 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 City of York Council if any of these apply:
We draw the footprint, the ridge and eaves heights and the neighbours' daylight on the page — the relationships City of York 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 City of York Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. City of York grants the large majority of householder applications in Acomb, with the historic village-green conservation area the tightest constraint and the suburban semi stock otherwise offering good extension potential. 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 Acomb Village, Front Street and Chapelfields, 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 historic village-core cottages around acomb green, a side-return infill frequently pairs with it to square off the plan; on wider edwardian terraces linking acomb to holgate, a two-storey side or rear extension can add a bedroom above without swallowing the garden.
Generous interwar plots make rear and side extensions viable, but officers guard the spacing and building lines of paired semis. 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 City of York 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 Acomb projects come up most often:
Extension drawings for Acomb Village's historic cottages and church around the green in the conservation area — footprint-checked, daylight-tested and drawn to City of York Council's guidance.
Extension drawings for Front Street's the suburb's traditional shopping street with flats over shops — footprint-checked, daylight-tested and drawn to City of York Council's guidance.
Extension drawings for Chapelfields's postwar semi-detached suburban housing to the west — footprint-checked, daylight-tested and drawn to City of York Council's guidance.
Extension drawings for Westfield's interwar and postwar estate housing on generous plots — footprint-checked, daylight-tested and drawn to City of York Council's guidance.
Extension drawings for Hob Moor's housing edging the protected Hob Moor common land — footprint-checked, daylight-tested and drawn to City of York Council's guidance.
The right extension in Acomb 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 City of York 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 Acomb and St Paul's Square / Holgate Road and Article 4 directions can remove permitted-development rights.
A fixed process built around how City of York Council validates and decides householder extension applications — most drawings are submission-ready within seven days of survey.
Tell us your Acomb 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 City of York 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 City of York 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 City of York 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 Acomb you will need to apply to City of York 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 Acomb and St Paul's Square / Holgate Road.
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 City of York Council and a neighbour-consultation period, and it does not apply on designated land such as Acomb'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 City of York 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 Acomb address specifically.
A householder planning application in Acomb 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. City of York 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 City of York Council's building control or an approved inspector can sign the work off. This applies to your Acomb address specifically.
Every house and brief is different, so we price each Acomb extension individually and send a fixed, no-obligation quote back within one working day. It covers the full drawing pack with free revisions until City of York 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.