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Redbridge, London

House extension drawings in Redbridge

House extension drawings for a Redbridge home start at £695 including VAT. The Housing Design Guide SPD gives rule-of-thumb depths, heights and set-backs for the main extension types, so the first sketch can be tested against real figures.

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    Finished white-rendered rear house extension with large glazed doors

    House extension drawings in Redbridge: the Housing Design SPD's figures

    For single-storey rear extensions the SPD gives maximum depths from the original rear wall, as a rule of thumb: 3.5 m terraced (incl. end terrace) and semi-detached; 4.5 m detached. They are guidance, not a wall, but they are the figures the council measures from.

    Height is covered as well. Flat-roof rear extensions are generally 3 m flat; 4 m pitched ridge, and pitched roofs must not encroach on first-floor windows. The guidance also limits the parapet on a flat roof, so the edge detail has to be drawn, not left to the builder.

    The daylight test uses the SPD's 45-degree rule: 45 degrees (plan and elevation). The first-floor footprint must fit within the line on plan, and in elevation the extension must fit within lines drawn upwards from the nearest ground-floor window. We plot both lines on every Redbridge sheet.

    Two-storey rear extension under construction on a semi-detached house

    Local figures for Redbridge

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Single-storey rear extensions: maximum depths from the original rear wall, a rule of thumb.3.5 m terraced (incl. end terrace) and semi-detached; 4.5 m detached—redbridge.gov.uk, Redbridge Housing Design SPD (Sept 2019), p.13, para 3.2.2 (PDF p.14)
    Flat-roof rear extensions generally 3 m high (parapet max 150 mm); pitched roofs eaves no higher than 3 m and 4 m overall, and must not encroach on first-floor windows.3 m flat; 4 m pitched ridge—redbridge.gov.uk, Redbridge Housing Design SPD (Sept 2019), p.13, paras 3.2.5-3.2.6
    45-degree rule: lines at 45 degrees from the centre of the nearest habitable window of the neighbour; the first-floor footprint must fit within it, and in elevation the extension must fit within lines drawn upwards from the nearest ground-floor window.45 degrees (plan and elevation)—redbridge.gov.uk, Redbridge Housing Design SPD (Sept 2019), p.14, para 3.3.4
    Single-storey side extensions: width no more than half the width of the host house; depth not beyond the host except when combined with a rear extension.half the host width—redbridge.gov.uk, Redbridge Housing Design SPD (Sept 2019), p.15, para 3.4.1
    First-floor rear element generally a maximum of 3 m deep, also subject to the 45-degree rule; ground floor follows single-storey depths.3 m—redbridge.gov.uk, Redbridge Housing Design SPD (Sept 2019), p.14, para 3.3.1
    First-floor rear element no more than half the width of the original rear elevation; eaves no higher than the host's.half the original rear width—redbridge.gov.uk, Redbridge Housing Design SPD (Sept 2019), p.14, paras 3.3.2-3.3.3
    Two-storey side extensions: first floor set back at least 0.5 m from the main front elevation; on open-character corner plots set in 1 m from the side boundary.0.5 m set-back; 1 m to boundary (open corner plots)—redbridge.gov.uk, Redbridge Housing Design SPD (Sept 2019), p.16, paras 3.5.3-3.5.4
    Where a two-storey side and rear extension are combined, the first-floor rear element is set in 0.5 m from the side elevation of the extension.0.5 m—redbridge.gov.uk, Redbridge Housing Design SPD (Sept 2019), p.16, para 3.5.5
    Green Belt share of the council area34 % of council area covered by green-belt polygons—planning.data.gov.uk
    Conservation areas16 named conservation areas published by the council—planning.data.gov.uk
    Listed building entries134 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Larger home extension prior approvals granted46 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Larger home extension prior approvals refused93 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Householder decisions991 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted82.8 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications decided in time94.7 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Domestic gardens share of land (GLUD 2005)27.4 % of land that is domestic garden (GLUD 2005)2005data.london.gov.uk
    GPDO 2015 Sch 2 Pt 1 Class A, para A.1(f)(i)3 m (attached) / 4 m (detached) beyond the original rear wall, single storey—legislation.gov.uk
    Householder: alterations/extensions to a single dwellinghouse, from 1 Apr 2026548 GBP—ribblevalley.gov.uk
    Supplementary planning documentHousing Design Guide SPD2019redbridge.gov.uk
    Households living in a house66.2 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk

    A blank value means the figure has not been published, not that there are none. Check your own address with the council.

    Councils bordering Redbridge

    Householder applications by street in Redbridge

    Streets in Redbridge with the most householder applications, and the share approved
    StreetApplicationsApproved
    Wensleydale Avenue3773%
    Kings Avenue3371%
    Gyllyngdune Gardens3239%
    Malford Grove3171%
    Wanstead Park Avenue2989%
    Broadwalk2791%
    Falmouth Gardens2788%
    Levett Gardens2758%
    Beehive Lane2548%
    Goodmayes Lane2471%
    High View Road2483%
    Woodlands Avenue2486%
    Beattyville Gardens2378%
    Bressey Grove2386%
    Monkhams Avenue2386%
    Counts of householder applications by street; no individual applications are shown. Streets with fewer than five applications are left out.Source: GLA Planning London Datahub, householder applications, all years held. Contains public sector information licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2026.
    Single-storey rear extension: the permitted development limitsDepth beyond the original rear wall: 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey. Maximum height: 4 m. Within the zone near the boundary: Eaves no higher than 3 m where within 2 m of the curtilage boundary. Larger extension under prior approval: 6 m (attached) / 8 m (detached), single storey, height max 4 m; not on article 2(3) land or an SSSIABCD

    Single-storey rear extension: the permitted development limits

    The house in section with a rear extension; the dashed lines mark the zone near the boundary.

    A · Depth beyond the original rear wall
    3 m (attached) / 4 m (detached) beyond the original rear wall, single storey
    B · Maximum height
    4 m
    C · Within the zone near the boundary
    Eaves no higher than 3 m where within 2 m of the curtilage boundary
    D · Larger extension under prior approval
    6 m (attached) / 8 m (detached), single storey, height max 4 m; not on article 2(3) land or an SSSI

    Side, infill and wraparound extensions in Redbridge

    Single-storey side extensions are asked to be no more than half the host width, and not to go beyond the host house in depth except when combined with a rear extension. The preferred approach to rear projections is an infill extension that does not extend beyond the rear elevation of the existing projection.

    Wraparound extensions need particularly careful consideration, with low eaves and shallow pitched roofs to limit the impact on neighbours. Our wraparound extension drawings in Redbridge show how that is drawn on a typical plot.

    A side extension and a rear extension built together have to meet the tests for both, which is where the figures above start to interact.

    Going up: two-storey extensions

    The first-floor rear element is generally 3 m deep at most, also subject to the daylight rule, and no more than half the original rear width, with eaves no higher than the host's. The ground floor follows the single-storey depths.

    For two-storey side extensions the figures are: 0.5 m set-back; 1 m to boundary (open corner plots). Where a two-storey side and rear extension are combined, the first-floor rear element is set in 0.5 m from the side elevation of the extension.

    Read together, those tests give a stepped shape. Our double-storey extension drawings in Redbridge show how it is drawn.

    Green Belt, conservation areas and listed buildings

    About 34 per cent of Redbridge is Green Belt, and an extension to a house inside it is judged on proportionality against the original building. The borough also has 16 conservation areas and 134 listed building entries.

    About 66.2 per cent of households live in a house, and domestic gardens cover around 27.4 per cent of the land, so many homes here have both a house and a garden to extend into. We check the address for each constraint in the free constraints check before quoting.

    Prior approval and permitted development in Redbridge

    Where permitted development applies, a single-storey rear extension may follow the national rule: 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey. A Lawful Development Certificate in Redbridge confirms it in writing.

    The larger home extension route has a public record in Redbridge. In its latest published year the council granted 46 and refused 93. Refusals outnumber grants, so the neighbour consultation is worth treating as a real test.

    How Redbridge decides householder applications, and what we draw

    The council decided 991 householder applications in its latest published year, granted 82.8 per cent and decided 94.7 per cent within eight weeks or an agreed extension. The fee for a single dwelling is £548, paid to the council.

    A Redbridge extension set shows existing and proposed floor plans, elevations and sections, plus the location and block plans. Drawings start at £695 with VAT included, and a second MCIAT chartered technologist checks each sheet. If the council asks for changes we redraw at no charge until approval.

    For the whole borough, see architectural drawings in Redbridge. Neighbouring owners in Newham work to different guidance.

    What you receive

    Planning drawing sheet for a rear extension with plans, elevations and sections
    Sample drawing. Planning drawings for a rear extension: plans, elevations and sections on one sheet set.
    House extension under construction with scaffolding, new glazed doors and building materials
    Every side considered
    Flick across the turntable to spin it.

    Other services in Redbridge

    House extension drawings nearby

    Questions

    How deep can a rear extension be in Redbridge?

    Redbridge's Housing Design SPD gives rule-of-thumb single-storey depths of 3.5 m terraced (incl. end terrace) and semi-detached; 4.5 m detached, measured from the original rear wall.

    What is Redbridge's 45-degree rule?

    It is a daylight test: 45 degrees (plan and elevation). The first-floor footprint must fit within the line on plan, and the extension must fit within lines drawn upwards from the nearest ground-floor window.

    How deep can a first-floor rear extension be in Redbridge?

    Generally 3 m at most, also subject to the daylight rule, and no more than half the original rear width.

    How much do house extension drawings cost in Redbridge?

    From £695 including VAT, fixed up front. The council's householder fee, £548, is paid separately.

    Sources and dates

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