Two-storey extension drawings for Woolston homes — bedroom above, living space below, drawn against the 3-metre projection and 7-metre boundary rules and to Southampton City Council's design guidance, delivered in days and revised free until your decision.
Southampton City Council granted 92% of the householder planning decisions it made in its latest published year — 5 points above the 87% England-wide householder average. The tidal Itchen and Southampton Water frontage bring flood-risk and regeneration policy into most riverside schemes, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901), Edwardian (1901–1910), interwar (1918–1939) 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. Woolston carries at least one Article 4 direction, and conservation areas including Old Woolston and St Anne's Road and Itchen Valley remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Woolston is determined against an 8-week statutory target.
Woolston (Victorian and Edwardian terraces built for the shipyard workforce), Old Woolston (the historic riverside core in a designated conservation area with St Anne's Road), Centenary Quay (modern waterfront apartments on the former Vosper Thornycroft yard), Sholing border (interwar and postwar semis climbing away from the river), Weston (postwar estate housing along the shore of Southampton Water) and Peartree (terraces and semis around Peartree Green and its historic church) — these are the Woolston pockets our drawings cover most. Heritage designations here include Old Woolston and St Anne's Road and Itchen Valley. Southampton City Council weighs each proposal against the Southampton City Local Plan / Core Strategy, where the maritime and shipbuilding heritage of Old Woolston constrains alterations within the conservation area. Converted flats and modern apartments are common around the waterfront regeneration, and those units carry no householder permitted-development rights.. On roofs the borough is pitched slate and tile roofs on the terraces and hipped roofs on the interwar semis, over Victorian and Edwardian terraces built for shipyard and maritime workers, interwar and postwar semis and modern waterfront apartments on the former Vosper Thornycroft shipyard.
Adding at first floor changes the question the case officer asks. A single-storey extension is judged mostly on daylight and garden loss; a two-storey extension is judged on overlooking, bulk against the neighbouring roofline, and whether it reads as part of the house or bolted onto it. Woolston is largely Victorian and Edwardian terraces built for shipyard and maritime workers, interwar and postwar semis and modern waterfront apartments on the former Vosper Thornycroft shipyard, and pitched slate and tile roofs on the terraces and hipped roofs on the interwar semis set what a matching roof actually means here.
The permitted-development route exists but is narrow: 3 metres of rear projection, a 7-metre stand-off from the rear boundary, eaves and ridge no higher than the original, and side-facing upper windows obscure-glazed and non-opening below 1.7 metres above floor level. Most two-storey schemes fail one of those, usually the 7-metre boundary rule on a shorter garden, and go in as a full application instead. We establish which route applies before designing, because it changes the drawing set.
The tidal Itchen and Southampton Water frontage bring flood-risk and regeneration policy into most riverside schemes. Woolston sits on the east bank of the Itchen and, like the rest of the city, falls under the HMO Article 4 direction adopted in March 2012 that removes the right to create a small HMO without planning permission, though student pressure here is lighter than around the university.
Some two-storey rear extensions are permitted development. You will need a full application to Southampton City Council if any of these apply:
We set the projection and boundary distance on the site plan, prove the roof-pitch match on the elevations, and specify obscure glazing on the side windows — the three things Southampton City Council checks first — then submit a validation-complete pack.
Below is Southampton City Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Southampton grants around 92% of applications, with Woolston's flood-plain frontage and shipyard-era heritage the main constraints on riverside schemes. Two-storey schemes attract more neighbour comment than any other householder work, so the overlooking and daylight case has to be made on the drawings.
Source: MHCLG planning application statistics (householder decisions, England, 1 April 2025 - 31 March 2026). Compare every borough on our London approval-rate league table.
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Across Woolston, Old Woolston and Centenary Quay, the schemes that succeed set the first floor back from the ground floor, keep the ridge below the original, and treat the flank wall as blank or obscure-glazed. On victorian and edwardian terraces built for shipyard and maritime workers, matching the eaves line matters more than matching the brick: an extension that carries the existing eaves through reads as original even in a different material.
The maritime and shipbuilding heritage of Old Woolston constrains alterations within the conservation area. We draw the 45-degree daylight test from the neighbour's nearest habitable window, show the window positions in section, and set out the steel and foundation implications early — a two-storey extension changes the load path, so the structural design and the planning design have to be developed together rather than in sequence.
We draw two-storey extensions across Woolston. A few of the areas where they come up most often:
Two storey extension drawings for Woolston — Victorian and Edwardian terraces built for the shipyard workforce — dimensioned against the 3m and 7m limits and drawn to Southampton City Council's guidance.
Two storey extension drawings for Old Woolston — the historic riverside core in a designated conservation area with St Anne's Road — dimensioned against the 3m and 7m limits and drawn to Southampton City Council's guidance.
Two storey extension drawings for Centenary Quay — modern waterfront apartments on the former Vosper Thornycroft yard — dimensioned against the 3m and 7m limits and drawn to Southampton City Council's guidance.
Two storey extension drawings for Sholing border — interwar and postwar semis climbing away from the river — dimensioned against the 3m and 7m limits and drawn to Southampton City Council's guidance.
Two storey extension drawings for Weston — postwar estate housing along the shore of Southampton Water — dimensioned against the 3m and 7m limits and drawn to Southampton City Council's guidance.
Two storey extension drawings for Peartree — terraces and semis around Peartree Green and its historic church — dimensioned against the 3m and 7m limits and drawn to Southampton City Council's guidance.
The first-floor limits are tighter than the ground-floor ones. This is how the common cases compare.
| Scheme | Permitted development? | Deciding limit | What Southampton City Council checks |
|---|---|---|---|
| Two-storey rear, 3m projection, 7m+ to boundary | Often yes | 3m projection / 7m boundary | Roof match, side-window glazing |
| Two-storey rear, under 7m to boundary | No — full application | Rear-boundary distance | Overlooking, daylight, garden loss |
| Two-storey side extension | No — full application | Side elevation | Gap to boundary, street rhythm |
| Two-storey wraparound | No — full application | Combined footprint | Bulk, massing, neighbour amenity |
| Any two-storey on designated land | No — full application | Designation | Character and appearance |
Limits from the GPDO 2015, Schedule 2, Part 1, Class A — two-storey rear extension conditions.
A fixed process built around how Southampton City Council validates and decides two-storey applications.
Send us your Woolston postcode and garden depth. We measure the 7-metre boundary rule against your plot, confirm designation status, and score your odds against live Southampton City Council decisions.
We measure the original rear wall, eaves and ridge heights, garden depth and every neighbouring window that faces the site — the inputs the daylight and overlooking case is built from.
Chartered designers develop the two-storey addition to your brief with the roof and eaves resolved, and we coordinate the load path so the structural scheme and the planning scheme are the same building.
We submit the application, manage validation and case-officer queries, and revise the drawings free until Southampton City Council issues its decision.
Often, but not always. A two-storey rear extension can be permitted development if it projects no more than 3 metres, sits at least 7 metres from the rear boundary, does not exceed the existing eaves and ridge, and has obscure-glazed non-opening side windows below 1.7 metres. In Woolston, the 7-metre rule is what most commonly forces a full application to Southampton City Council.
No part of a permitted-development two-storey rear extension may come within 7 metres of the boundary opposite the rear wall of the house. It exists to protect the neighbour behind you from being overlooked at first floor. On shorter Woolston gardens this is decisive, and we measure it on survey before any design work rather than discovering it at validation. Southampton City Council is the decision-maker.
Not under permitted development — two-storey side extensions always need a full application to Southampton City Council. They are assessed on the gap to the boundary, whether the street's rhythm of spaces between houses survives, and whether the extension is subordinate to the original. Setting the first floor back from the front building line and down from the ridge is what usually makes the difference. This applies to your Woolston address specifically.
Overlooking is the most common objection, and it is answerable on the drawings. We position habitable-room windows away from neighbouring gardens, obscure-glaze and fix shut anything on the flank below 1.7 metres, and show the sight lines in section. Where the geometry is tight, a rooflight or a high-level window gives the same daylight without the mutual overlooking that draws objections. This applies to your Woolston address specifically. Southampton City Council is the decision-maker.
Almost certainly. Excavating within 3 metres of a neighbouring structure and building on or up to the boundary both trigger the Party Wall etc. Act 1996, and a two-storey extension usually does both. It is entirely separate from Southampton City Council's planning decision, so we flag the notice period early and detail the junction on the drawings. This applies to your Woolston address specifically.
Yes. Adding a floor changes the load path from roof to foundation, so beams, padstones and foundation depths all need designing and calculating for building control. Planning and building regulations are separate consents, and the structural set is what building control assesses — we prepare both so the approved scheme is the buildable one. This applies to your Woolston address specifically. Southampton City Council is the decision-maker.
We quote each Woolston two-storey extension individually, because plot depth, roof form and structural complexity vary house to house, and send a fixed, no-obligation quote within one working day. It covers the drawing pack with free revisions until Southampton City Council approves. Call 020 7864 7245 to start.
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