Single-storey, double-storey, rear and side extension drawings for Calderdale homes — measured to Calderdale Metropolitan Borough Council's design guidance, delivered in days and revised free until your decision, with a free approval-odds check before you commit.
Calderdale Metropolitan Borough Council granted 87% of the householder planning decisions it made in its latest published year — level with the 87% England-wide householder average. Calderdale contains Akroydon, Copley, Halifax Town Centre Conservation Area conservation areas (Akroydon designated 1976), so materials, fenestration and roof form are assessed against the appraisal, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901) and interwar (1918–1939) 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. Calderdale carries at least one Article 4 direction, and conservation areas including Akroydon, Copley and Halifax Town Centre Conservation Area remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Calderdale is determined against an 8-week statutory target.
Akroydon (conservation area designated in 1976), Copley (conservation area designated in 1983), Halifax Town Centre (conservation area designated in 1974), Hebden Bridge (conservation area designated in 1973), Heptonstall (conservation area designated in 1971), Huddersfield Road East (conservation area designated in 2005), Luddenden (conservation area designated in 1973), Lumbutts and Mankinholes (conservation area designated in 1980), Calder (ward of Calderdale), Luddendenfoot (ward of Calderdale), Ryburn (ward of Calderdale), Skircoat (ward of Calderdale) and Town (ward of Calderdale) — these are the Calderdale pockets our drawings cover most. Heritage designations here include Akroydon, Copley, Halifax Town Centre Conservation Area, Hebden Bridge, Heptonstall, Huddersfield Road East, Luddenden and Lumbutts and Mankinholes. Calderdale Metropolitan Borough Council weighs each proposal against Calderdale Metropolitan Borough Council's adopted local plan and its householder design guidance, where the 29,990 homes here are 38% pre-1900, 8% 1930-1939, 8% 2000-2008, which is what sets the realistic roof and rear-projection options. On roofs the borough is steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and hipped roofs with shallow pitches typical of 1930s building, over Victorian and earlier houses (38% of 29,990 homes), 1930s semi-detached and detached houses (8%) and 2000s houses and apartments (8%).
Before anything is drawn we check your address against the designations that apply in Calderdale: Akroydon (conservation area designated in 1976), Copley (conservation area designated in 1983), Halifax Town Centre (conservation area designated in 1974), Hebden Bridge (conservation area designated in 1973), Heptonstall (conservation area designated in 1971), Huddersfield Road East (conservation area designated in 2005), Luddenden (conservation area designated in 1973) and Lumbutts and Mankinholes (conservation area designated in 1980). Inside those boundaries permitted development is curtailed and Calderdale Metropolitan Borough Council assesses materials, window detail and roof form against the area's own appraisal, so a scheme that would be waved through two streets away can need a full application here.
Beyond the designated areas, Calderdale takes in Calder, Luddendenfoot, Ryburn, Skircoat and Town. Calderdale Metropolitan Borough Council has 8 recorded Article 4 directions, removing permitted development for roof enlargements such as dormers and outbuildings and garden buildings — check the address before assuming PD applies in the district.
On stock, Calderdale is Victorian and earlier houses (38% of 29,990 homes), 1930s semi-detached and detached houses (8%) and 2000s houses and apartments (8%) — which is why steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and hipped roofs with shallow pitches typical of 1930s building govern what a loft or rear projection can realistically be. Calderdale Metropolitan Borough Council decided 384 householder applications in the latest published year and granted 87%, with 58% issued inside the eight-week target. That decision record, not a national figure, is what we design to.
The full build-period split for Calderdale runs pre-1900 3% (190 homes), 1900-1918 0% (30 homes), 1919-1929 0% (10 homes), 1930-1939 6% (350 homes), 1945-1954 3% (170 homes), 1955-1964 30% (1,850 homes), 1965-1972 33% (1,990 homes), 1973-1982 4% (260 homes), 1983-1992 5% (310 homes), 1993-1999 4% (220 homes) and 2000-2008 3% (170 homes). That distribution is why pre-1900 detailing dominates the drawings here, and it is measured from council-tax records rather than assumed from the street name.
Calderdale Metropolitan Borough Council also decides for Calder, Luddendenfoot, Ryburn, Skircoat and Town, so a decision in Calderdale sits inside a wider pattern of decisions we track across the same authority — useful when an officer cites a precedent from the next area over.
The Article 4 directions recorded for this council include 1 Eiffel Street, Hebden Bridge., 1-10 Stocks Gardens, Mytholmeroyd., 22 West Laithe, Heptonstall. and 35 Hangingroyd Lane, Hebden Bridge.. Each removes a specific permitted-development right inside its own boundary, which is why the check is done on the address rather than on the town.
Published figures for Calderdale and Calderdale Metropolitan Borough Council. These are the numbers that decide what is realistic on your street, so we work from them rather than from national averages.
| Measure | Calderdale |
|---|---|
| Dwellings recorded | 29,990 |
| Built pre-1900 | 190 (3%) |
| Built 1900-1918 | 30 (0%) |
| Built 1919-1929 | 10 (0%) |
| Built 1930-1939 | 350 (6%) |
| Built 1945-1954 | 170 (3%) |
| Built 1955-1964 | 1,850 (30%) |
| Built 1965-1972 | 1,990 (33%) |
| Built 1973-1982 | 260 (4%) |
| Built 1983-1992 | 310 (5%) |
| Built 1993-1999 | 220 (4%) |
| Built 2000-2008 | 170 (3%) |
| Built before 1919 | 43% |
| Built 1919–1939 | 13% |
| Built 1945–2008 | 37% |
| Conservation areas in Calderdale | 8 (Akroydon, Copley…) |
| Conservation areas district-wide | 27 |
| Article 4 directions recorded | 8 |
| Householder applications decided | 384 |
| Householder applications granted | 87% |
| Decided within 8 weeks | 58% |
Dwelling stock from VOA council-tax data at 31 March 2025; conservation-area and Article 4 counts from planning.data.gov.uk (MHCLG); decision figures are Calderdale Metropolitan Borough Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
Calderdale homes come in a handful of recurring shapes, and each one points to a different extension. The borough is built largely from Victorian and earlier houses (38% of 29,990 homes), 1930s semi-detached and detached houses (8%) and 2000s houses and apartments (8%), 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. Calderdale Metropolitan Borough Council judges every one of them against Calderdale Metropolitan Borough Council's adopted local plan and its householder design guidance, 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. Calderdale contains Akroydon, Copley, Halifax Town Centre Conservation Area conservation areas (Akroydon designated 1976), so materials, fenestration and roof form are assessed against the appraisal, so we design around it from the first sketch rather than discover it at validation.
Calderdale also protects whole streets — Akroydon, Copley, Halifax Town Centre Conservation Area, Hebden Bridge, Heptonstall, Huddersfield Road East, Luddenden and Lumbutts and Mankinholes among them. Calderdale Metropolitan Borough Council has 8 recorded Article 4 directions, removing permitted development for roof enlargements such as dormers and outbuildings and garden buildings — check the address before assuming PD applies in 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 Calderdale 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 Calderdale Metropolitan Borough Council if any of these apply:
We draw the footprint, the ridge and eaves heights and the neighbours' daylight on the page — the relationships Calderdale Metropolitan Borough 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 Calderdale Metropolitan Borough Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Calderdale Metropolitan Borough Council granted 87% of 384 householder decisions in the year to 31 March 2026, 58% of them inside eight weeks. 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 Akroydon, Copley and Halifax Town Centre, 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 victorian and earlier houses (38% of 29,990 homes), a side-return infill frequently pairs with it to square off the plan; on wider 2000s houses and apartments (8%), a two-storey side or rear extension can add a bedroom above without swallowing the garden.
The 29,990 homes here are 38% pre-1900, 8% 1930-1939, 8% 2000-2008, which is what sets the realistic roof and rear-projection options. 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 Calderdale Metropolitan Borough 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 Calderdale projects come up most often:
Extension drawings for Akroydon's conservation area designated in 1976 — footprint-checked, daylight-tested and drawn to Calderdale Metropolitan Borough Council's guidance.
Extension drawings for Copley's conservation area designated in 1983 — footprint-checked, daylight-tested and drawn to Calderdale Metropolitan Borough Council's guidance.
Extension drawings for Halifax Town Centre's conservation area designated in 1974 — footprint-checked, daylight-tested and drawn to Calderdale Metropolitan Borough Council's guidance.
Extension drawings for Hebden Bridge's conservation area designated in 1973 — footprint-checked, daylight-tested and drawn to Calderdale Metropolitan Borough Council's guidance.
Extension drawings for Heptonstall's conservation area designated in 1971 — footprint-checked, daylight-tested and drawn to Calderdale Metropolitan Borough Council's guidance.
Extension drawings for Huddersfield Road East's conservation area designated in 2005 — footprint-checked, daylight-tested and drawn to Calderdale Metropolitan Borough Council's guidance.
The right extension in Calderdale 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 Calderdale Metropolitan Borough 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 Akroydon and Copley and Article 4 directions can remove permitted-development rights.
A fixed process built around how Calderdale Metropolitan Borough Council validates and decides householder extension applications — most drawings are submission-ready within seven days of survey.
Tell us your Calderdale 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 Calderdale Metropolitan Borough 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 Calderdale Metropolitan Borough 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 Calderdale Metropolitan Borough 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 Calderdale you will need to apply to Calderdale Metropolitan Borough 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 Akroydon and Copley.
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 Calderdale Metropolitan Borough Council and a neighbour-consultation period, and it does not apply on designated land such as Calderdale'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 Calderdale Metropolitan Borough 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.
A householder planning application in Calderdale 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. Calderdale Metropolitan Borough 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 Calderdale Metropolitan Borough Council's building control or an approved inspector can sign the work off.
Every house and brief is different, so we price each Calderdale extension individually and send a fixed, no-obligation quote back within one working day. It covers the full drawing pack with free revisions until Calderdale Metropolitan Borough 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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