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Redbridge, London

Double-storey extension drawings in Redbridge

We prepare double-storey extension drawings for Redbridge houses from £1,295 including VAT. The borough's own design guide is specific about the upper floor: a first-floor rear element is generally held to 3 m deep, so the design starts from that figure rather than from the maximum a plot could physically take.

From £1,295 (VAT included)

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    Finished white-rendered rear house extension with large glazed doors

    Redbridge's rules for a double-storey extension

    Redbridge sets out its expectations in the Housing Design Guide SPD. For the rear, it says a first-floor element should generally be no more than 3 m deep and is also subject to the 45-degree rule. The width limit is just as firm: half the original rear width, and the eaves should not rise above those of the original house.

    A side extension is judged on a different set of tests. The guide asks for the upper storey to be pulled back from the front of the house, and on open corner plots to be set in from the side boundary: 0.5 m set-back; 1 m to boundary (open corner plots). Where a side and a rear extension are combined into one L-shaped addition, the first-floor rear part steps in again by 0.5 m from the side elevation of the new work.

    These are the dimensions your drawings are tested against, so we put them on the model before the first sketch. A ground floor can run deeper than the floor above it, and the stepped result is often how a Redbridge family gets a larger kitchen and a bedroom over it without crossing the line.

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

    Local figures for Redbridge

    Figures with their unit, period and source
    MeasureValuePeriodSource
    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
    Conservation areas16 named conservation areas published by the council—planning.data.gov.uk
    Green Belt share of the council area34 % of council area covered by green-belt polygons—planning.data.gov.uk
    Listed building entries134 list entries (Historic England, within the LPA boundary)—planning.data.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
    Class A, para A.1(h)Over one storey: max 3 m beyond the original rear wall and not within 7 m of the rear boundary—legislation.gov.uk
    Approved Document B Vol 1, 2019 ed. incl. 2026 amendments, para 2.10Escape window: unobstructed openable area at least 0.33 m², at least 450 mm high and 450 mm wide, bottom of opening no more than 1100 mm above floor—gov.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.
    The 45-degree test in planTest used in daylight assessments: 45 degrees (plan and elevation). Redbridge guidance: 45 degrees (plan and elevation)AB

    The 45-degree test in plan

    A line from the middle of the neighbour's nearest window: the extension should stay behind it.

    A · Test used in daylight assessments
    45 degrees (plan and elevation)
    B · Redbridge guidance
    45 degrees (plan and elevation)

    What the national rules add

    Under permitted development, the limit for anything above one storey is stated as: Over one storey: max 3 m beyond the original rear wall and not within 7 m of the rear boundary. In a conservation area the position is simpler and stricter: No rear extension of more than one storey under PD on article 2(3) land. Redbridge has 16 conservation areas, so the address check comes first.

    A Redbridge double-storey scheme therefore usually needs a householder application, drawn to the local guide above. Our house extension drawings in Redbridge page covers the wider choice between extension types.

    Redbridge houses and what they tend to need

    Around 66.2 per cent of Redbridge households live in a house, and 57.1 per cent own their home. For many of those owners, building over a new ground-floor room is the obvious way to gain a bedroom.

    The Green Belt covers 34 per cent of the borough area, and the borough has 134 listed building entries. A house near either brings extra tests on bulk and setting, which we flag at the first call instead of after the design is drawn.

    How Redbridge has decided householder applications

    In its latest published year Redbridge decided 991 householder applications. It granted 82.8 per cent of them and decided 94.7 per cent within eight weeks or an agreed extension.

    These cover all householder work, not only two-storey additions, so they tell you about pace rather than your chances. Drawing to the guide's dimensions from the start avoids an obvious reason for a request to change.

    Upper-floor windows, fire safety and structure

    A new bedroom needs a way out. Approved Document B sets the escape window as: Escape window: unobstructed openable area at least 0.33 m², at least 450 mm high and 450 mm wide, bottom of opening no more than 1100 mm above floor. Side-facing upper windows have their own condition: Upper-floor side windows obscure-glazed and non-opening below 1.7 m above floor.

    The extra storey also loads the walls below, so the beams and foundations are checked by an engineer and shown on the drawings. See structural calculations in Redbridge when that stage arrives, and building regulations drawings for the full submission.

    Price, what you receive and neighbouring boroughs

    The fee is £1,295 with VAT included, fixed before you commit, and the council fee for a householder application is £548 paid separately. You receive both floors, elevations, sections and the location plans, each sheet checked by a second chartered technologist, and we redraw at no charge if the council asks for changes.

    If a single-storey scheme might do, compare it with rear extension drawings in Redbridge. Elsewhere in east London, the same job across the border is covered in Waltham Forest and Barking and Dagenham. For everything we do locally, see architectural drawings in Redbridge, and for the rules nationally the double-storey extension drawings overview.

    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

    Double-storey extension drawings nearby

    Questions

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

    Redbridge's design guide generally limits a first-floor rear element to 3 m, and it must also satisfy the 45-degree rule. The ground floor below follows the single-storey depths.

    Can a Redbridge two-storey side extension go up to the boundary?

    Not on an open corner plot. The guide asks for the following: 0.5 m set-back; 1 m to boundary (open corner plots).

    Do I need planning permission for a double-storey extension in Redbridge?

    Usually. The permitted development limit is tight (Over one storey: max 3 m beyond the original rear wall and not within 7 m of the rear boundary), and in any of the borough's 16 conservation areas it does not apply.

    How much do double-storey extension drawings cost in Redbridge?

    From £1,295 including VAT, fixed up front. The council's application fee is separate.

    Sources and dates

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