Back-of-house extension drawings for Alton Whitedown homes — the glazed kitchen-diner across the rear, drawn to East Hampshire District Council's depth and daylight limits, delivered in days and revised free until your decision, with a free approval-odds check first.
East Hampshire District Council granted 91% of the householder planning decisions it made in its latest published year — 4 points above the 87% England-wide householder average. Alton Whitedown contains the The Butts (Alton) conservation area (The Butts (Alton) 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 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 East Hampshire District Council needs a full application. Alton Whitedown carries at least one Article 4 direction, and conservation areas including The Butts (Alton) remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Alton Whitedown is determined against an 8-week statutory target.
The Butts (Alton) (conservation area designated in 1976) and Alton (civil parish within Alton Whitedown) — these are the Alton Whitedown pockets our drawings cover most. Heritage designations here include The Butts (Alton). East Hampshire District Council weighs each proposal against East Hampshire District Council's development plan and the design policies it applies to householder applications, where the 1,650 homes here are 14% 2000-2008, 13% 1945-1954, 10% 1955-1964, which is what sets the realistic roof and rear-projection options. On roofs the borough is trussed-rafter roofs typical of 2000s building and simple gabled and hipped roofs typical of early postwar building, over 2000s houses and apartments (14% of 1,650 homes), early postwar houses (13%) and late-1950s and early-1960s houses (10%).
Heritage designation is the single biggest variable in Alton Whitedown, and it is address-specific: The Butts (Alton) (conservation area designated in 1976). Inside those boundaries permitted development is curtailed and East Hampshire District 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, Alton Whitedown takes in Alton. East Hampshire District Council has 50 recorded Article 4 directions — check the address before assuming PD applies in Alton Whitedown.
On stock, Alton Whitedown is 2000s houses and apartments (14% of 1,650 homes), early postwar houses (13%) and late-1950s and early-1960s houses (10%) — which is why trussed-rafter roofs typical of 2000s building and simple gabled and hipped roofs typical of early postwar building govern what a loft or rear projection can realistically be. East Hampshire District Council decided 327 householder applications in the latest published year and granted 91%, with 24% issued inside the eight-week target. We work from the council's own published record.
The full build-period split for Alton Whitedown runs pre-1900 4% (60 homes), 1900-1918 6% (100 homes), 1919-1929 1% (20 homes), 1930-1939 5% (90 homes), 1945-1954 13% (210 homes), 1955-1964 10% (160 homes), 1965-1972 7% (110 homes), 1973-1982 8% (130 homes), 1983-1992 3% (50 homes), 1993-1999 1% (20 homes) and 2000-2008 14% (230 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.
East Hampshire District Council also decides for Alton Holybourne, Bentworth & Froyle, Bramshott & Liphook, Buriton & East Meon, Four Marks & Medstead, Headley, Horndean Catherington and Liss, so a decision in Alton Whitedown 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 Ajax House/Plowden House, Liphook, Bedford Road, Petersfield, Bellhanger Enterprises, Bentworth and Bentley Business Park, Bentley. 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 Alton Whitedown and East Hampshire District Council. These are the numbers that decide what is realistic on your street, so we work from them rather than from national averages.
| Measure | Alton Whitedown |
|---|---|
| Dwellings recorded | 1,650 |
| Built pre-1900 | 60 (4%) |
| Built 1900-1918 | 100 (6%) |
| Built 1919-1929 | 20 (1%) |
| Built 1930-1939 | 90 (5%) |
| Built 1945-1954 | 210 (13%) |
| Built 1955-1964 | 160 (10%) |
| Built 1965-1972 | 110 (7%) |
| Built 1973-1982 | 130 (8%) |
| Built 1983-1992 | 50 (3%) |
| Built 1993-1999 | 20 (1%) |
| Built 2000-2008 | 230 (14%) |
| Built before 1919 | 10% |
| Built 1919–1939 | 7% |
| Built 1945–2008 | 55% |
| Conservation areas in Alton Whitedown | 1 (The Butts (Alton)) |
| Conservation areas district-wide | 50 |
| Article 4 directions recorded | 50 |
| Householder applications decided | 327 |
| Householder applications granted | 91% |
| Decided within 8 weeks | 24% |
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 East Hampshire District Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
The rear extension is the workhorse of Alton Whitedown home improvement — it is how a dark back kitchen becomes an open family room facing the garden. Because the borough is built largely from 2000s houses and apartments (14% of 1,650 homes), early postwar houses (13%) and late-1950s and early-1960s houses (10%), most back walls sit close to a neighbour on at least one side, and that proximity, not the design, is what East Hampshire District Council scrutinises. The council reads the proposal against East Hampshire District Council's development plan and the design policies it applies to householder applications, 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. Alton Whitedown contains the The Butts (Alton) conservation area (The Butts (Alton) designated 1976), so materials, fenestration and roof form are assessed against the appraisal, so the rear elevation is composed around it rather than corrected after an objection.
Where the property sits in a conservation area — The Butts (Alton) among Alton Whitedown's — the larger-home extension route is switched off and even a modest rear addition needs consent. East Hampshire District Council has 50 recorded Article 4 directions — check the address before assuming PD applies in Alton Whitedown. We confirm the designation before the survey.
Many single-storey rear extensions in Alton Whitedown are permitted development and need no application. You will normally need to apply to East Hampshire District 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 East Hampshire District 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 East Hampshire District Council's real householder decision record, taken from official planning statistics and refreshed as new data lands. East Hampshire District Council granted 91% of its householder applications in the year to 31 March 2026, and The Butts (Alton) shapes what is approved here. 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 The Butts (Alton) and Alton, 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 2000s houses and apartments (14% of 1,650 homes), 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.
The 1,650 homes here are 14% 2000-2008, 13% 1945-1954, 10% 1955-1964, which is what sets the realistic roof and rear-projection options. We keep the extension inside the daylight splays, set any glazed roof below the first-floor cill, and retain the garden depth East Hampshire District 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 Alton Whitedown back-of-house projects come up most often:
Rear extension drawings for The Butts (Alton)'s conservation area designated in 1976 — depth-checked, daylight-tested and drawn to East Hampshire District Council's guidance.
Rear extension drawings for Alton's civil parish within Alton Whitedown — depth-checked, daylight-tested and drawn to East Hampshire District Council's guidance.
How far you can extend at the back in Alton Whitedown depends on your house type and the route you take. This is how the options compare.
| Route | Depth allowed | Consent needed | What East Hampshire District 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 The Butts (Alton) and Article 4 streets need a full application.
A fixed process built around how East Hampshire District Council validates and decides rear-extension applications — most drawings are submission-ready within seven days of survey.
Send us your Alton Whitedown 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 East Hampshire District 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 East Hampshire District 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 East Hampshire District 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 Alton Whitedown. You will need to involve East Hampshire District 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 The Butts (Alton), 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 East Hampshire District 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 Alton Whitedown's conservation areas.
It is the daylight test East Hampshire District 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 Alton Whitedown address specifically.
A two-storey rear extension almost always needs a full householder application to East Hampshire District 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 Alton Whitedown 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 East Hampshire District 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 Alton Whitedown address specifically.
We price each Alton Whitedown 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 East Hampshire District 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.