Single-storey, double-storey, rear and side extension drawings for Harewood homes — measured to Test Valley Borough Council's design guidance, delivered in days and revised free until your decision, with a free approval-odds check before you commit.
Test Valley Borough Council granted 96% of the householder planning decisions it made in its latest published year — 9 points above the 87% England-wide householder average. Harewood contains Barton Stacey, Chilbolton, Longparish conservation areas (Barton Stacey designated 1984), 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 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. In conservation areas such as Barton Stacey, Chilbolton and Longparish those rights are removed, so we confirm your exact address before a line is drawn. A validated householder application in Harewood is determined against an 8-week statutory target.
Barton Stacey (conservation area designated in 1984), Chilbolton (conservation area designated in 1984), Longparish (conservation area designated in 1983), Wherwell (conservation area designated in 1969), Chilbolton (civil parish within Harewood), Bullington (civil parish within Harewood), Barton Stacey (civil parish within Harewood), Longparish (civil parish within Harewood) and Wherwell (civil parish within Harewood) — these are the Harewood pockets our drawings cover most. Heritage designations here include Barton Stacey, Chilbolton, Longparish and Wherwell. Test Valley Borough Council weighs each proposal against Test Valley Borough Council's development plan and the design policies it applies to householder applications, where the 1,750 homes here are 30% pre-1900, 13% 1945-1954, 10% 1955-1964, 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 simple gabled and hipped roofs typical of early postwar building, over Victorian and earlier houses (30% of 1,750 homes), early postwar houses (13%) and late-1950s and early-1960s houses (10%).
Before anything is drawn we check your address against the designations that apply in Harewood: Barton Stacey (conservation area designated in 1984), Chilbolton (conservation area designated in 1984), Longparish (conservation area designated in 1983) and Wherwell (conservation area designated in 1969). Inside those boundaries permitted development is curtailed and Test Valley 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, Harewood takes in Chilbolton, Bullington, Barton Stacey, Longparish and Wherwell. No Article 4 direction is recorded for Test Valley Borough Council, but Harewood's 4 conservation areas still limit permitted development on those streets.
On stock, Harewood is Victorian and earlier houses (30% of 1,750 homes), early postwar houses (13%) and late-1950s and early-1960s houses (10%) — which is why steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and simple gabled and hipped roofs typical of early postwar building govern what a loft or rear projection can realistically be. Test Valley Borough Council decided 533 householder applications in the latest published year and granted 96%, with 76% issued inside the eight-week target. That decision record, not a national figure, is what we design to.
The full build-period split for Harewood runs pre-1900 30% (530 homes), 1900-1918 5% (80 homes), 1919-1929 2% (30 homes), 1930-1939 3% (60 homes), 1945-1954 13% (230 homes), 1955-1964 10% (180 homes), 1965-1972 7% (130 homes), 1973-1982 7% (120 homes), 1983-1992 6% (100 homes), 1993-1999 3% (50 homes) and 2000-2008 5% (80 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.
Test Valley Borough Council also decides for Blackwater, Mid Test, Ampfield & Braishfield, Anna, Bellinger, Bourne Valley and Charlton & the Pentons, so a decision in Harewood 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.
Published figures for Harewood and Test Valley 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 | Harewood |
|---|---|
| Dwellings recorded | 1,750 |
| Built pre-1900 | 530 (30%) |
| Built 1900-1918 | 80 (5%) |
| Built 1919-1929 | 30 (2%) |
| Built 1930-1939 | 60 (3%) |
| Built 1945-1954 | 230 (13%) |
| Built 1955-1964 | 180 (10%) |
| Built 1965-1972 | 130 (7%) |
| Built 1973-1982 | 120 (7%) |
| Built 1983-1992 | 100 (6%) |
| Built 1993-1999 | 50 (3%) |
| Built 2000-2008 | 80 (5%) |
| Built before 1919 | 35% |
| Built 1919–1939 | 5% |
| Built 1945–2008 | 51% |
| Conservation areas in Harewood | 4 (Barton Stacey, Chilbolton…) |
| Conservation areas district-wide | 36 |
| Article 4 directions recorded | 0 |
| Householder applications decided | 533 |
| Householder applications granted | 96% |
| Decided within 8 weeks | 76% |
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 Test Valley Borough Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
Harewood 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 (30% of 1,750 homes), early postwar houses (13%) and late-1950s and early-1960s houses (10%), 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. Test Valley Borough Council judges every one of them against Test Valley Borough Council's development plan and the design policies it applies to householder applications, 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. Harewood contains Barton Stacey, Chilbolton, Longparish conservation areas (Barton Stacey designated 1984), 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.
Harewood also protects whole streets — Barton Stacey, Chilbolton, Longparish and Wherwell among them. No Article 4 direction is recorded for Test Valley Borough Council, but Harewood's 4 conservation areas still limit permitted development on those streets. 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 Harewood 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 Test Valley 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 Test Valley 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 Test Valley Borough Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Test Valley Borough Council granted 96% of its householder applications in the year to 31 March 2026, and Barton Stacey shapes what is approved here. 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 Barton Stacey, Chilbolton and Longparish, 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 (30% of 1,750 homes), a side-return infill frequently pairs with it to square off the plan; on wider late-1950s and early-1960s houses (10%), a two-storey side or rear extension can add a bedroom above without swallowing the garden.
The 1,750 homes here are 30% pre-1900, 13% 1945-1954, 10% 1955-1964, 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 Test Valley 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 Harewood projects come up most often:
Extension drawings for Barton Stacey's conservation area designated in 1984 — footprint-checked, daylight-tested and drawn to Test Valley Borough Council's guidance.
Extension drawings for Chilbolton's conservation area designated in 1984 — footprint-checked, daylight-tested and drawn to Test Valley Borough Council's guidance.
Extension drawings for Longparish's conservation area designated in 1983 — footprint-checked, daylight-tested and drawn to Test Valley Borough Council's guidance.
Extension drawings for Wherwell's conservation area designated in 1969 — footprint-checked, daylight-tested and drawn to Test Valley Borough Council's guidance.
Extension drawings for Chilbolton's civil parish within Harewood — footprint-checked, daylight-tested and drawn to Test Valley Borough Council's guidance.
Extension drawings for Bullington's civil parish within Harewood — footprint-checked, daylight-tested and drawn to Test Valley Borough Council's guidance.
The right extension in Harewood 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 Test Valley 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 Barton Stacey and Chilbolton and Article 4 directions can remove permitted-development rights.
A fixed process built around how Test Valley Borough Council validates and decides householder extension applications — most drawings are submission-ready within seven days of survey.
Tell us your Harewood 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 Test Valley 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 Test Valley 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 Test Valley 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 Harewood you will need to apply to Test Valley 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 Barton Stacey and Chilbolton.
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 Test Valley Borough Council and a neighbour-consultation period, and it does not apply on designated land such as Harewood'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 Test Valley 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. This applies to your Harewood address specifically.
A householder planning application in Harewood 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. Test Valley 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 Test Valley Borough Council's building control or an approved inspector can sign the work off. This applies to your Harewood address specifically.
Every house and brief is different, so we price each Harewood extension individually and send a fixed, no-obligation quote back within one working day. It covers the full drawing pack with free revisions until Test Valley Borough Council approves, and we tell you upfront whether your extension qualifies as permitted development. Call 020 7864 7245 to get started.
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.