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Side return extension plans in Basingstoke and Deane — a glazed side-return infill opening up a period kitchen
Basingstoke and Deane · Side Return Extension Drawings & Planning

Side return extension plans in Basingstoke and Deane

Side-return infill drawings for Basingstoke and Deane terraces — the glazed extension that fills the redundant side alley and opens up the kitchen, drawn to Basingstoke and Deane Borough Council's guidance, delivered in days and revised free until your decision, with a free approval-odds check first.

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What the data says about planning in Basingstoke and Deane

Basingstoke and Deane 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. Basingstoke and Deane contains Ashmansworth, Basingstoke Canal, Bradley conservation areas (Ashmansworth designated 1989), 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.

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 Basingstoke and Deane Borough Council needs a full application. Basingstoke and Deane carries at least one Article 4 direction, and conservation areas including Ashmansworth, Basingstoke Canal and Bradley remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Basingstoke and Deane is determined against an 8-week statutory target.

Ashmansworth (conservation area designated in 1989), Basingstoke Canal (conservation area designated in 1977), Bradley (conservation area designated in 1992), Bramley and Bramley Green (conservation area designated in 1983), Brown and Chilton Candover (conservation area designated in 1981), Church Oakley (conservation area designated in 1976), Church Road, Tadley (conservation area designated in 1982), Cliddesden (conservation area designated in 1981), Basing & Upton Grey (ward of Basingstoke and Deane), Bramley (ward of Basingstoke and Deane), Evingar (ward of Basingstoke and Deane), Oakley & The Candovers (ward of Basingstoke and Deane), Tadley & Pamber (ward of Basingstoke and Deane) and Winklebury & Manydown (ward of Basingstoke and Deane) — these are the Basingstoke and Deane pockets our drawings cover most. Heritage designations here include Ashmansworth, Basingstoke Canal, Bradley, Bramley and Bramley Green, Brown and Chilton Candover, Church Oakley, Church Road, Tadley and Cliddesden. Basingstoke and Deane Borough Council weighs each proposal against the adopted Basingstoke and Deane local plan and Basingstoke and Deane Borough Council's design guidance for householder work, where the 25,000 homes here are 17% 1973-1982, 14% 1965-1972, 7% pre-1900, which is what sets the realistic roof and rear-projection options. On roofs the borough is shallow trussed roofs typical of 1970s building and shallow-pitched roofs and integral garages typical of that period's building, over 1970s and early-1980s houses (17% of 25,000 homes), late-1960s and early-1970s houses (14%) and Victorian and earlier houses (7%).

Designations, stock and decisions in Basingstoke and Deane

Heritage designation is the single biggest variable in Basingstoke and Deane, and it is address-specific: Ashmansworth (conservation area designated in 1989), Basingstoke Canal (conservation area designated in 1977), Bradley (conservation area designated in 1992), Bramley and Bramley Green (conservation area designated in 1983), Brown and Chilton Candover (conservation area designated in 1981), Church Oakley (conservation area designated in 1976), Church Road, Tadley (conservation area designated in 1982) and Cliddesden (conservation area designated in 1981). Inside those boundaries permitted development is curtailed and Basingstoke and Deane 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, Basingstoke and Deane takes in Basing & Upton Grey, Bramley, Evingar, Oakley & The Candovers, Tadley & Pamber and Winklebury & Manydown. Basingstoke and Deane Borough Council has 3 recorded Article 4 directions — check the address before assuming PD applies in the district.

On stock, Basingstoke and Deane is 1970s and early-1980s houses (17% of 25,000 homes), late-1960s and early-1970s houses (14%) and Victorian and earlier houses (7%) — which is why shallow trussed roofs typical of 1970s building and shallow-pitched roofs and integral garages typical of that period's building govern what a loft or rear projection can realistically be. Basingstoke and Deane Borough Council decided 616 householder applications in the latest published year and granted 96%, with 59% issued inside the eight-week target. We work from the council's own published record.

The full build-period split for Basingstoke and Deane runs pre-1900 3% (190 homes), 1900-1918 0% (30 homes), 1919-1929 0% (10 homes), 1930-1939 6% (350 homes), 1945-1954 3% (170 homes), 1955-1964 30% (1,850 homes), 1965-1972 33% (1,990 homes), 1973-1982 4% (260 homes), 1983-1992 5% (310 homes), 1993-1999 4% (220 homes) and 2000-2008 3% (170 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.

Basingstoke and Deane Borough Council also decides for Basing & Upton Grey, Bramley, Evingar, Oakley & The Candovers, Tadley & Pamber and Winklebury & Manydown, so a decision in Basingstoke and Deane 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 Basing View, Basingstoke Town and Chineham and the surrounding villages of Old Basing, Oakley and Sherborne St John. and Chineham Business Park and Hampshire International Business Park. 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.

The published numbers behind a Basingstoke and Deane application

Published figures for Basingstoke and Deane and Basingstoke and Deane Borough Council. These are the numbers that decide what is realistic on your street, so we work from them rather than from national averages.

MeasureBasingstoke and Deane
Dwellings recorded25,000
Built pre-1900190 (3%)
Built 1900-191830 (0%)
Built 1919-192910 (0%)
Built 1930-1939350 (6%)
Built 1945-1954170 (3%)
Built 1955-19641,850 (30%)
Built 1965-19721,990 (33%)
Built 1973-1982260 (4%)
Built 1983-1992310 (5%)
Built 1993-1999220 (4%)
Built 2000-2008170 (3%)
Built before 191912%
Built 1919–19395%
Built 1945–200867%
Conservation areas in Basingstoke and Deane8 (Ashmansworth, Basingstoke Canal…)
Conservation areas district-wide43
Article 4 directions recorded3
Householder applications decided616
Householder applications granted96%
Decided within 8 weeks59%

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 Basingstoke and Deane Borough Council's own, from MHCLG live table PS2 for the year to 31 March 2026.

Side returns drawn for Basingstoke and Deane's period terraces

The side return is the classic terrace fix, and Basingstoke and Deane has the stock for it — the borough is built largely from 1970s and early-1980s houses (17% of 25,000 homes), late-1960s and early-1970s houses (14%) and Victorian and earlier houses (7%), and the Victorian and Edwardian versions almost all have an L-shaped back addition with a wasted alley beside it. Fill that alley and the dark galley kitchen becomes a bright, square room the full width of the house. Basingstoke and Deane Borough Council judges the infill against the adopted Basingstoke and Deane local plan and Basingstoke and Deane Borough Council's design guidance for householder work, and because it runs along the party boundary, the neighbour relationship is read before the design.

That boundary is where the drawings earn their keep. We set the infill wall on or up to the line, keep the roof — usually a glazed lantern or a shallow pitch tying into the existing back-addition slope — below the neighbour's first-floor windows, and detail the rainwater and party-wall junction so the build is watertight and the Party Wall Act is satisfied. Basingstoke and Deane contains Ashmansworth, Basingstoke Canal, Bradley conservation areas (Ashmansworth designated 1989), so materials, fenestration and roof form are assessed against the appraisal, so we resolve it on the section rather than leave it to the case officer.

Many of Basingstoke and Deane's terraces sit in conservation areas — Ashmansworth, Basingstoke Canal, Bradley, Bramley and Bramley Green, Brown and Chilton Candover, Church Oakley, Church Road, Tadley and Cliddesden among them — where a side extension is no longer permitted development. Basingstoke and Deane Borough Council has 3 recorded Article 4 directions — check the address before assuming PD applies in the district. We confirm the designation before a line is drawn.

Isometric side return extension drawing for a Basingstoke and Deane terrace

Does a side return extension need planning permission in Basingstoke and Deane?

Some single-storey side returns in Basingstoke and Deane are permitted development, but the width and boundary make an application more likely than for a straight rear extension. You will normally need to apply to Basingstoke and Deane Borough Council if any of these apply:

  • The side extension is wider than half the width of the original house
  • It is more than one storey, or higher than 4 metres (or higher than the eaves along the side)
  • The property is on designated land — side extensions are not permitted development in conservation areas
  • You are combining the side return with a rear extension beyond 3 metres, which reads as a wraparound
  • Your terrace is in a conservation area such as Ashmansworth and Basingstoke Canal, where side-extension rights are removed
  • An Article 4 direction applies to your street — Basingstoke and Deane operates several, so this is checked first

Basingstoke and Deane side return approval rates — live from council data

Below is Basingstoke and Deane Borough Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Basingstoke and Deane Borough Council granted 96% of 616 householder decisions in the year to 31 March 2026, 59% of them inside eight weeks. Side returns hinge on width, roof glazing and the party boundary, so a pack that resolves those details 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.

96%householder applications approved in Basingstoke and Deane
87%national average — Basingstoke and Deane is 9 points above the national average

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What side return extensions get approved in Basingstoke and Deane

Across Ashmansworth, Basingstoke Canal and Bradley, the approved side return is a single-storey infill roofed with a glazed lantern or roof light to pull daylight deep into the plan, its flank wall built on the boundary and finished to match the host brick. On the borough's 1970s and early-1980s houses (17% of 25,000 homes), this is frequently the single biggest gain in usable ground-floor space, and where it stays within the width and height limits it can proceed under permitted development or a lawful development certificate.

The 25,000 homes here are 17% 1973-1982, 14% 1965-1972, 7% pre-1900, which is what sets the realistic roof and rear-projection options. We keep the glazed roof below the neighbour's cill line, set the gutter and the party-wall flashing so water and maintenance are designed in, and — where owners want the full open-plan room — pair the infill with a rear extension as a single wraparound application. That way Basingstoke and Deane Borough Council sees one coherent scheme rather than two overlapping ones.

Side return extension squaring off the ground floor of a Basingstoke and Deane terrace

Side return extensions across Basingstoke and Deane

We draw side-return infills on every terraced street in the borough. A few of the neighbourhoods where Basingstoke and Deane side returns come up most often:

Ashmansworth

Side return extension drawings for Ashmansworth's conservation area designated in 1989 — width-checked, party-wall detailed and drawn to Basingstoke and Deane Borough Council's guidance.

Basingstoke Canal

Side return extension drawings for Basingstoke Canal's conservation area designated in 1977 — width-checked, party-wall detailed and drawn to Basingstoke and Deane Borough Council's guidance.

Bradley

Side return extension drawings for Bradley's conservation area designated in 1992 — width-checked, party-wall detailed and drawn to Basingstoke and Deane Borough Council's guidance.

Bramley and Bramley Green

Side return extension drawings for Bramley and Bramley Green's conservation area designated in 1983 — width-checked, party-wall detailed and drawn to Basingstoke and Deane Borough Council's guidance.

Brown and Chilton Candover

Side return extension drawings for Brown and Chilton Candover's conservation area designated in 1981 — width-checked, party-wall detailed and drawn to Basingstoke and Deane Borough Council's guidance.

Church Oakley

Side return extension drawings for Church Oakley's conservation area designated in 1976 — width-checked, party-wall detailed and drawn to Basingstoke and Deane Borough Council's guidance.

Is your Basingstoke and Deane side return permitted development or a full application?

Whether a side return in Basingstoke and Deane needs permission comes down to width, storeys and whether the street is designated. This is how the cases compare.

Side return typePermitted development?What it gainsWhat Basingstoke and Deane Borough Council checks
Single-storey infill, within limitsOften yes, if under half the house widthFull-width kitchen-dinerWidth, 4m height, roof glazing
Single-storey, over half widthNo — full applicationWider room, more lightBoundary treatment, neighbour amenity
Two-storey side returnNo — full applicationRoom above as well as belowBulk, overlooking, terrace rhythm
Wraparound (side + rear)No — full applicationL-shaped open-plan ground floorCombined footprint, garden retained

In conservation areas such as Ashmansworth and Basingstoke Canal, side extensions are not permitted development and always need a full application.

Four steps to an approved Basingstoke and Deane side return

A fixed process built around how Basingstoke and Deane Borough Council validates and decides side-return applications — most drawings are submission-ready within seven days of survey.

  1. 1

    Free approval check

    Send us your Basingstoke and Deane postcode and terrace type. We confirm your conservation and Article 4 status, whether the infill stays within the side-extension width limit, and score your odds against live Basingstoke and Deane Borough Council decisions.

  2. 2

    Measured survey

    We measure the side alley, the back-addition wall, floor and eaves levels and the neighbour's window heights — the numbers the width limit, roof pitch and party-wall detailing depend on.

  3. 3

    Side return design & drawings

    Chartered designers develop the infill and its glazed roof to your brief, drawn inside the permitted-development limits or to Basingstoke and Deane Borough Council's extension guidance, with the boundary and party-wall junction detailed.

  4. 4

    Submission & follow-through

    We submit the certificate or application, manage validation and case-officer queries, and revise the drawings free until Basingstoke and Deane Borough Council issues its decision.

Frequently asked questions

Does a side return extension need planning permission in Basingstoke and Deane?

Sometimes not. A single-storey side-return infill can be permitted development if it is no wider than half the original house, no higher than 4 metres, and the property is not on designated land. In Basingstoke and Deane you will need a full application to Basingstoke and Deane Borough Council for anything wider or taller, for a two-storey side return, and for any side extension in a conservation area such as Ashmansworth and Basingstoke Canal, where those rights are removed.

What is a side return extension on a Basingstoke and Deane terrace?

It is an infill that fills the narrow open alley running alongside the rear back-addition of a Victorian or Edwardian terrace — the strip of ground that is usually too small to use. Building over it squares off the ground floor, so a cramped galley kitchen becomes a full-width room. Basingstoke and Deane's period terraces are ideally suited to it, which is why the side return is one of the borough's most common extensions. Basingstoke and Deane Borough Council is the decision-maker.

Do I need a party wall agreement for a side return in Basingstoke and Deane?

Almost always. A side return is built on or up to the boundary with your neighbour, so the Party Wall etc. Act applies and you must serve notice before work starts — this is entirely separate from Basingstoke and Deane Borough Council's planning decision. We detail the party-wall junction on the drawings and flag the notice early so a surveyor can be appointed without delaying the build.

Can I combine a side return with a rear extension in Basingstoke and Deane?

Yes, and it is common — the combined L-shape is a wraparound extension. Once the side infill joins a rear projection beyond the permitted-development depth, the whole thing needs a full householder application to Basingstoke and Deane Borough Council rather than qualifying as permitted development. We draw it as one coherent scheme so the council assesses a single footprint, which reads more clearly than two overlapping proposals.

How long does Basingstoke and Deane Borough Council take to decide a side return application?

A householder planning application in Basingstoke and Deane runs to a statutory eight-week target, and a lawful development certificate to eight weeks as well, though an incomplete pack can stall at validation. Because a side return involves the boundary and roof glazing, a complete, well-detailed submission matters — we prepare it validation-complete and manage officer queries to keep the decision on track. Basingstoke and Deane Borough Council is the decision-maker.

How much do side return extension plans in Basingstoke and Deane cost?

We price each Basingstoke and Deane side return individually, because alley width and roof form vary house to house, and send a fixed, no-obligation quote within one working day. It covers the full drawing pack with free revisions until Basingstoke and Deane Borough Council approves, and we confirm at the outset whether your infill is permitted development or needs an application. Call 020 7864 7245 to start.

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