The fast route to a deep single-storey rear extension in Lymington — up to 6 metres on an attached house or 8 on a detached one — via New Forest District Council's prior approval scheme rather than a full planning application.
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.
The ordinary Class A limits stop a single-storey rear extension at 3 metres on an attached house and 4 on a detached one. The larger home extension scheme doubles both, on condition that the council is told first. That notification is not an application for permission — the council cannot refuse on design, materials or policy grounds. It can only consider the effect on the amenity of adjoining premises, and only if a neighbour actually objects during the 21-day consultation.
The other conditions still apply and are strict: single storey only, no higher than 4 metres, eaves no higher than the existing eaves, and no more than half the land around the original house covered. It is not available on designated land, so a house in a conservation area such as Kings Saltern and Lymington cannot use it at all. Materials must be similar to the existing house, and the extension must not include a veranda, balcony or raised platform.
Lymington is largely 1980s estate houses (18% of 4,580 homes), 1970s and early-1980s houses (13%) and Victorian and earlier houses (12%). Lymington contains Kings Saltern, Lymington conservation areas (Kings Saltern designated 2001), so materials, fenestration and roof form are assessed against the appraisal, which matters here because an objecting neighbour puts amenity squarely in front of a case officer. 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.
The scheme is available where all of these hold. Fail any one and it is a full application to New Forest District Council instead:
We prepare the notification pack New Forest District Council needs — plans, elevations, a site plan with the adjoining owners identified — and manage the 21-day neighbour consultation so the 42-day clock is not restarted by an incomplete submission.
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. Prior approval turns on neighbour amenity alone, so the drawings that matter are the ones showing the relationship to the boundary.
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 notifications that clear without objection are the ones that treat the neighbour as the audience. We show the extension in section against the boundary, demonstrate the 45-degree daylight relationship to the nearest habitable window, and where the plot is tight we taper the depth away from the boundary rather than running the full 6 metres to the fence.
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. Where an objection does arrive, the council's assessment is narrow: loss of light, outlook and overbearing effect on the adjoining property, nothing else. A pack that has already answered those three points on the drawings usually survives an objection, whereas one that leaves them to the officer's imagination usually does not.
We prepare prior-approval notifications across Lymington. A few of the areas where deep rear extensions come up most often:
Prior approval drawings for Kings Saltern — conservation area designated in 2001 — dimensioned to the 6m and 8m limits and prepared for New Forest District Council's neighbour consultation.
Prior approval drawings for Lymington — conservation area designated in 1999 — dimensioned to the 6m and 8m limits and prepared for New Forest District Council's neighbour consultation.
Prior approval drawings for Lymington and Pennington — civil parish within Lymington — dimensioned to the 6m and 8m limits and prepared for New Forest District Council's neighbour consultation.
Same extension, two routes, very different tests.
| Route | Depth allowed | What the council may consider | Timescale |
|---|---|---|---|
| Ordinary Class A permitted development | 3m attached / 4m detached | Nothing — no application needed | Immediate |
| Larger home extension prior approval | 6m attached / 8m detached | Amenity of adjoining premises, only if a neighbour objects | 21-day consultation, 42-day determination |
| Full householder application | No fixed limit | Design, materials, policy, amenity, everything | 8-week target |
| Any of these on designated land | 3m / 4m only | Prior approval scheme unavailable | Full application beyond the limits |
Limits and procedure from the GPDO 2015, Schedule 2, Part 1, Class A and paragraph A.4, made permanent by amendment in 2019.
A process built around the 21-day consultation, which is where these schemes are won or lost.
Send us your Lymington postcode and house type. We confirm whether the property is on designated land, whether the scheme is available, and what depth you can realistically take.
We measure the original rear wall, eaves height, boundary distances and the neighbouring windows that the amenity assessment will turn on.
We draw the extension to the 6m or 8m limit with the boundary relationship shown in section, and prepare the written description and adjoining-owner details New Forest District Council needs to start the consultation.
We submit, track the 21-day consultation and the 42-day determination, respond to any objection on amenity grounds, and revise free until the decision.
Three metres on a terraced or semi-detached house and four on a detached one under ordinary permitted development. Under the larger home extension prior approval scheme those double to six and eight metres, provided you notify New Forest District Council before starting and the conditions on height, materials and land coverage are met. The scheme is not available on designated land. This applies to your Lymington address specifically.
It is a notification, not an application for permission. You tell New Forest District Council what you intend to build, it writes to the adjoining owners, and they have 21 days to object. If nobody objects, you may build. If someone does, the council assesses the effect on the amenity of adjoining premises and must decide within 42 days. Design and policy are not in scope. This applies to your Lymington address specifically.
The council then considers the impact on the amenity of the adjoining property — loss of light, loss of outlook, and overbearing effect — and nothing else. It cannot refuse because it dislikes the design or the materials. We prepare the drawings so those three questions are already answered in section and on the site plan, which is what usually carries an objected scheme through. This applies to your Lymington address specifically. New Forest District Council is the decision-maker.
No. The larger home extension scheme is unavailable on designated land, which includes conservation areas such as Kings Saltern and Lymington, national landscapes, national parks and world heritage sites. On those properties the ordinary 3-metre and 4-metre limits apply, and anything deeper needs a full householder application to New Forest District Council.
Twenty-one days for the neighbour consultation, and a maximum of 42 days from a valid submission for the council to determine it. If the council does not respond within 42 days you may proceed as notified. That deadline is the scheme's real advantage over a full application, and it is why validation completeness matters so much. This applies to your Lymington address specifically. New Forest District Council is the decision-maker.
Yes — always. Prior approval deals only with the planning position. A 6-metre rear extension still needs building control approval for foundations, structure, drainage, thermal performance and fire safety, and the beam over the opening into the existing house needs designing and calculating. We prepare both sets so the notified scheme is the buildable one. This applies to your Lymington address specifically. New Forest District Council is the decision-maker.
We quote each Lymington scheme individually, because plot shape and the boundary relationship drive the work, and send a fixed, no-obligation quote within one working day. It covers the notification pack and free revisions until New Forest District Council determines it. Call 020 7864 7245 to start.
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