Single-storey, double-storey, rear and side extension drawings for Horsforth homes — measured to Leeds City Council's design guidance, delivered in days and revised free until your decision, with a free approval-odds check before you commit.
Leeds City Council granted 83% of the householder planning decisions it made in its latest published year — 4 points below the 87% England-wide householder average. Green belt to the north and west of Horsforth tightly limits extensions and new outbuildings, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901), interwar (1918–1939) and postwar (1945–1970) housing stock sets the design brief on most streets.
The permitted-development ceilings are fixed: 40m³ of new roof volume for a terraced loft and 50m³ for a semi or detached house under Class B, plus a 3m single-storey rear extension on a terrace or 4m on a detached house under Class A. Horsforth carries at least one Article 4 direction, and conservation areas including Horsforth, Horsforth Cragg Hill and Newlay remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Horsforth is determined against an 8-week statutory target.
Town Street (gritstone cottages and shops along the historic spine), Cragg Hill (stone terraces inside the Horsforth Cragg Hill conservation area), Newlay (riverside stone houses by the Leeds–Liverpool Canal conservation area), Woodside (Victorian and interwar houses near the station), Hall Park (interwar and postwar semis and detached houses) and Rawdon edge (larger stone houses towards Cragg Wood) — these are the Horsforth pockets our drawings cover most. Heritage designations here include Horsforth, Horsforth Cragg Hill, Newlay, Rawdon Cragg Wood and Woodhall Hills. Leeds City Council weighs each proposal against Leeds Local Plan / Core Strategy and the relevant SPDs, where gritstone cottages and terraces are held to matching natural stone and stone-slate roofs in the conservation areas. On roofs the borough is pitched stone-slate and slate gable roofs on the stone terraces and hipped roofs on the interwar semis, over millstone-grit stone cottages and through terraces, Victorian stone and red-brick villas, interwar semi-detached houses and postwar detached and estate housing.
Horsforth homes come in a handful of recurring shapes, and each one points to a different extension. The borough is built largely from millstone-grit stone cottages and through terraces, Victorian stone and red-brick villas, interwar semi-detached houses and postwar detached and estate housing, 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. Leeds City Council judges every one of them against Leeds Local Plan / Core Strategy and the 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. Green belt to the north and west of Horsforth tightly limits extensions and new outbuildings, so we design around it from the first sketch rather than discover it at validation.
Horsforth also protects whole streets — Horsforth, Horsforth Cragg Hill, Newlay, Rawdon Cragg Wood and Woodhall Hills among them. Horsforth marks the northern edge of the inner-Leeds HMO Article 4 ring, so converting a house to a small (C4) house in multiple occupation needs planning permission rather than permitted development. 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 Horsforth 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 Leeds 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 Leeds 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 Leeds City Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Leeds grants most householder applications in Horsforth, though green belt on the fringes and stone conservation-area detailing are the main limits on what gets consent. 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 Town Street, Cragg Hill and Newlay, 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 millstone-grit stone cottages and through terraces, a side-return infill frequently pairs with it to square off the plan; on wider postwar detached and estate housing, a two-storey side or rear extension can add a bedroom above without swallowing the garden.
Gritstone cottages and terraces are held to matching natural stone and stone-slate roofs in the conservation areas. 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 Leeds 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 Horsforth projects come up most often:
Extension drawings for Town Street's gritstone cottages and shops along the historic spine — footprint-checked, daylight-tested and drawn to Leeds City Council's guidance.
Extension drawings for Cragg Hill's stone terraces inside the Horsforth Cragg Hill conservation area — footprint-checked, daylight-tested and drawn to Leeds City Council's guidance.
Extension drawings for Newlay's riverside stone houses by the Leeds–Liverpool Canal conservation area — footprint-checked, daylight-tested and drawn to Leeds City Council's guidance.
Extension drawings for Woodside's Victorian and interwar houses near the station — footprint-checked, daylight-tested and drawn to Leeds City Council's guidance.
Extension drawings for Hall Park's interwar and postwar semis and detached houses — footprint-checked, daylight-tested and drawn to Leeds City Council's guidance.
Extension drawings for Rawdon edge's larger stone houses towards Cragg Wood — footprint-checked, daylight-tested and drawn to Leeds City Council's guidance.
The right extension in Horsforth 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 Leeds 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 Horsforth and Horsforth Cragg Hill and Article 4 directions can remove permitted-development rights.
A fixed process built around how Leeds City Council validates and decides householder extension applications — most drawings are submission-ready within seven days of survey.
Tell us your Horsforth 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 Leeds 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 Leeds 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 Leeds 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 Horsforth you will need to apply to Leeds 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 Horsforth and Horsforth Cragg Hill.
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 Leeds City Council and a neighbour-consultation period, and it does not apply on designated land such as Horsforth'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 Leeds 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 Horsforth address specifically.
A householder planning application in Horsforth 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. Leeds 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 Leeds City Council's building control or an approved inspector can sign the work off. This applies to your Horsforth address specifically.
Every house and brief is different, so we price each Horsforth extension individually and send a fixed, no-obligation quote back within one working day. It covers the full drawing pack with free revisions until Leeds 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.