Single-storey, double-storey, rear and side extension drawings for Lymington homes — measured to New Forest District Council's design guidance, delivered in days and revised free until your decision, with a free approval-odds check before you commit.
New Forest District Council granted 96% of the householder planning decisions it made in its latest published year — 9 points above the 87% England-wide householder average. Lymington contains Kings Saltern, Lymington conservation areas (Kings Saltern designated 2001), 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) 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. Lymington carries at least one Article 4 direction, and conservation areas including Kings Saltern and Lymington remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Lymington is determined against an 8-week statutory target.
Kings Saltern (conservation area designated in 2001), Lymington (conservation area designated in 1999) and Lymington and Pennington (civil parish within Lymington) — these are the Lymington pockets our drawings cover most. Heritage designations here include Kings Saltern and Lymington. New Forest District Council weighs each proposal against the adopted New Forest local plan and New Forest District Council's design guidance for householder work, where the 4,580 homes here are 18% 1983-1992, 13% 1973-1982, 12% pre-1900, which is what sets the realistic roof and rear-projection options. On roofs the borough is trussed-rafter roofs typical of 1980s building and shallow trussed roofs typical of 1970s building, over 1980s estate houses (18% of 4,580 homes), 1970s and early-1980s houses (13%) and Victorian and earlier houses (12%).
Before anything is drawn we check your address against the designations that apply in Lymington: Kings Saltern (conservation area designated in 2001) and Lymington (conservation area designated in 1999). Inside those boundaries permitted development is curtailed and New Forest 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, Lymington takes in Lymington and Pennington. New Forest District Council has 9 recorded Article 4 directions, removing permitted development for painting the exterior and gates, walls and fences — check the address before assuming PD applies in Lymington.
On stock, Lymington is 1980s estate houses (18% of 4,580 homes), 1970s and early-1980s houses (13%) and Victorian and earlier houses (12%) — which is why trussed-rafter roofs typical of 1980s building and shallow trussed roofs typical of 1970s building govern what a loft or rear projection can realistically be. New Forest District Council decided 531 householder applications in the latest published year and granted 96%, with 80% issued inside the eight-week target. That decision record, not a national figure, is what we design to.
The full build-period split for Lymington runs pre-1900 12% (550 homes), 1900-1918 3% (130 homes), 1919-1929 2% (100 homes), 1930-1939 6% (280 homes), 1945-1954 3% (130 homes), 1955-1964 7% (340 homes), 1965-1972 9% (390 homes), 1973-1982 13% (590 homes), 1983-1992 18% (840 homes), 1993-1999 4% (200 homes) and 2000-2008 10% (450 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.
New Forest District Council also decides for Hythe Central, Marchwood & Eling, Milford & Hordle, Milton and Totton North, so a decision in Lymington 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 ARTICLE 4 DIRECTION 97/1, ARTICLE 4 DIRECTION 97/2, ARTICLE 4 DIRECTION 97/5 and ARTICLE 4 DIRECTION 97/6. 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 Lymington and New Forest 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 | Lymington |
|---|---|
| Dwellings recorded | 4,580 |
| Built pre-1900 | 550 (12%) |
| Built 1900-1918 | 130 (3%) |
| Built 1919-1929 | 100 (2%) |
| Built 1930-1939 | 280 (6%) |
| Built 1945-1954 | 130 (3%) |
| Built 1955-1964 | 340 (7%) |
| Built 1965-1972 | 390 (9%) |
| Built 1973-1982 | 590 (13%) |
| Built 1983-1992 | 840 (18%) |
| Built 1993-1999 | 200 (4%) |
| Built 2000-2008 | 450 (10%) |
| Built before 1919 | 15% |
| Built 1919–1939 | 8% |
| Built 1945–2008 | 64% |
| Conservation areas in Lymington | 2 (Kings Saltern, Lymington) |
| Conservation areas district-wide | 23 |
| Article 4 directions recorded | 9 |
| Householder applications decided | 531 |
| Householder applications granted | 96% |
| Decided within 8 weeks | 80% |
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 New Forest District Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
Lymington homes come in a handful of recurring shapes, and each one points to a different extension. The borough is built largely from 1980s estate houses (18% of 4,580 homes), 1970s and early-1980s houses (13%) and Victorian and earlier houses (12%), 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. New Forest District Council judges every one of them against the adopted New Forest local plan and New Forest District Council's design guidance for householder work, 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. Lymington contains Kings Saltern, Lymington conservation areas (Kings Saltern designated 2001), 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.
Lymington also protects whole streets — Kings Saltern and Lymington among them. New Forest District Council has 9 recorded Article 4 directions, removing permitted development for painting the exterior and gates, walls and fences — check the address before assuming PD applies in Lymington. 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 Lymington 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 New Forest District Council if any of these apply:
We draw the footprint, the ridge and eaves heights and the neighbours' daylight on the page — the relationships New Forest District 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 New Forest District Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. New Forest District Council granted 96% of its householder applications in the year to 31 March 2026, and Kings Saltern 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 Kings Saltern, Lymington and Lymington and Pennington, 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 1980s estate houses (18% of 4,580 homes), a side-return infill frequently pairs with it to square off the plan; on wider victorian and earlier houses (12%), a two-storey side or rear extension can add a bedroom above without swallowing the garden.
The 4,580 homes here are 18% 1983-1992, 13% 1973-1982, 12% pre-1900, 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 New Forest District 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 Lymington projects come up most often:
Extension drawings for Kings Saltern's conservation area designated in 2001 — footprint-checked, daylight-tested and drawn to New Forest District Council's guidance.
Extension drawings for Lymington's conservation area designated in 1999 — footprint-checked, daylight-tested and drawn to New Forest District Council's guidance.
Extension drawings for Lymington and Pennington's civil parish within Lymington — footprint-checked, daylight-tested and drawn to New Forest District Council's guidance.
The right extension in Lymington 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 New Forest District 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 Kings Saltern and Lymington and Article 4 directions can remove permitted-development rights.
A fixed process built around how New Forest District Council validates and decides householder extension applications — most drawings are submission-ready within seven days of survey.
Tell us your Lymington 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 New Forest District 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 New Forest District 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 New Forest District 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 Lymington you will need to apply to New Forest District 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 Kings Saltern and Lymington.
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 New Forest District Council and a neighbour-consultation period, and it does not apply on designated land such as Lymington'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 New Forest District 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 Lymington address specifically.
A householder planning application in Lymington 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. New Forest District 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 New Forest District Council's building control or an approved inspector can sign the work off. This applies to your Lymington address specifically.
Every house and brief is different, so we price each Lymington extension individually and send a fixed, no-obligation quote back within one working day. It covers the full drawing pack with free revisions until New Forest District 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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