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Slate-clad roof extension on a yellow-brick London terraced house
Photograph: Daniel Sikpi

01Redbridge, London

Mansard roof drawings in Redbridge

Redbridge's Housing Design SPD writes its roof rules around rear dormers, parapets and hip-to-gable work, and a mansard meets the parapet line first. We draw the roof against those tests and against the 16 conservation areas in the borough, from £845 including VAT.

From £845 (VAT included)

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    02The brief

    What the Housing Design SPD says about roofs

    The Housing Design Guide SPD sets the council's roof tests. Rear dormers are acceptable in principle but must stay subordinate: set down from the ridge, above the eaves line and in from the shared boundary and roof edge, with less set-in from the edge on hipped roofs. Its position on terrace parapets and front or side dormers is: no raised parapets; no front/side dormers.

    On hip-to-gable the SPD's line reads: generally refused if out of character. Our data holds no mansard-specific test, so a mansard is read against these same character tests, and the parapet line is where it is most exposed.

    Rear view of brick terraced houses in London with slate roofs and chimney stacks along the shared roofline
    Brick cottage with a tiled roof, chimneys and a front dormer window
    Photograph: Tanya Barrow

    03The record

    Local figures for Redbridge

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Hip-to-gable generally refused where out of character or harming symmetry of a semi-detached pairgenerally refused if out of characterNo periodredbridge.gov.uk, Housing Design SPD (adopted September 2019), para 3.6.1
    Terrace parapet walls not to be built up; front and side dormers generally inappropriate unless characteristic of streetno raised parapets; no front/side dormersNo periodredbridge.gov.uk, Housing Design SPD (adopted September 2019), para 3.6.3
    Supplementary planning documentHousing Design Guide SPD2019redbridge.gov.uk
    Conservation areas16 named conservation areas published by the councilNo periodplanning.data.gov.uk
    Listed building entries134 list entries (Historic England, within the LPA boundary)No periodplanning.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
    Class AA, para AA.1(b)Class AA is not available on article 2(3) landNo periodlegislation.gov.uk
    Householder: alterations/extensions to a single dwellinghouse, from 1 Apr 2026548 GBPNo periodribblevalley.gov.uk

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

    Redbridge5 neighbouring councils
    Councils bordering Redbridge

    04The streets

    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.

    GLA Planning London Datahub, householder applications

    05The drawing

    A mansard roof in sectionA, Redbridge: set-back and parapet: no raised parapets; no front/side dormers. B, Permitted development and the eaves: Class B requires the original eaves to be maintained or reinstated, which a parapet-fronted mansard normally removes. C, Additional storeys under permitted development: Class AA additional storeys exclude houses built before 1 Jul 1948 or after 28 Oct 2018. D, Fire protection to the stair: New storey above 4.5 m by loft conversion: protect the full escape route with fire-resisting doors (min E 20) and partitions (min REI 30)ABCD

    A mansard roof in section

    A London terrace with a mansard behind the parapet. The lettered marks show the limits the legend gives.

    A Redbridge: set-back and parapet
    no raised parapets; no front/side dormers
    B Permitted development and the eaves
    Class B requires the original eaves to be maintained or reinstated, which a parapet-fronted mansard normally removes
    C Additional storeys under permitted development
    Class AA additional storeys exclude houses built before 1 Jul 1948 or after 28 Oct 2018
    D Fire protection to the stair
    New storey above 4.5 m by loft conversion: protect the full escape route with fire-resisting doors (min E 20) and partitions (min REI 30)
    The mansard in three dimensions3D
    Scroll the page: the model turns with it.

    06The detail

    Designations that change the route

    Historic England records 134 list entries in the borough, 12 of them at Grade II*, and a roof change to a listed house needs consent as well as permission. The route is covered by listed building consent drawings in Redbridge.

    Class AA is not available on article 2(3) land, and the Class AA date limits apply elsewhere: Class AA additional storeys exclude houses built before 1 Jul 1948 or after 28 Oct 2018. Redbridge also records an Article 4 direction on HMO conversions (C3 to C4), which governs use and not roofs.

    Reading the householder record

    Redbridge decided 991 householder applications in the latest return, and 82.8% were granted. Householder work covers every ordinary alteration, so the figure is background and says nothing definite about a roof storey.

    Class B asks for the original eaves to be kept, and a parapet-fronted mansard normally removes them. That is why a mansard here is a householder application, with a council fee of £548.

    What the drawings show

    We draw the existing and proposed roof in plan, section and elevation on one datum, with set-downs and set-ins dimensioned against the SPD's tests. A new storey brings its own fire rule: New storey above 4.5 m by loft conversion: protect the full escape route with fire-resisting doors (min E 20) and partitions (min REI 30).

    The new roof must meet the thermal limits for new elements in existing homes: New elements in existing dwellings, limiting U-values W/(m²·K): roof 0.15, wall 0.18, floor 0.18, windows 1.4 (or WER Band B), doors 1.4. Party structure notice at least 2 months before work, under the Party Wall etc. Act 1996.

    Next door and below ground

    A lower floor is covered in basement conversion drawings in Redbridge, and the neighbouring approach in mansard roof drawings in Newham. The general route is on the mansard roof drawings hub.

    Planning sheet for a single-storey rear extension: proposed ground floor plan and rear elevation, with the Property Architecture title block
    Sample drawing. Proposed plan and rear elevation from a planning application set, sheet 03 at 1:50.

    07The papers

    What the drawings rest on

    Converted loft bedroom with roof windows and a Juliet balconyLoft conversions
    Photograph: Imad Clicks
    Loft floor plan marked up in an independent review, with three critical issues clouded and explained
    Sample drawing. A loft plan with the reviewer’s mark-up: stair pitch, dormer cheeks and roof ventilation.

    08Correspondence

    Questions

    Can I build a dormer instead of a mansard in Redbridge?

    A rear dormer is acceptable in principle under the SPD if it stays subordinate. We draw the set-down, the set-back from the eaves and the set-in from the boundary so the officer can check each against the guidance.

    Does Redbridge allow raised parapets on terraces?

    The SPD's short-form position is: no raised parapets; no front/side dormers. That bears directly on a parapet-fronted mansard, so we say early whether your terrace allows a different roof form.

    How much do the drawings cost?

    From £845 including VAT, fixed up front. The council fee is £548, paid separately.

    Upper floors of a large yellow-brick Victorian house in London with chimney pots

    82.8%

    Householder applications granted, Redbridge, 1 July 2025 - 30 June 2026. Source: assets.publishing.service.gov.uk

    Photograph: Lorenc Memaga

    09Further reading

    Other services in Redbridge

    Mansard roof drawings nearby

    10Sources

    Sources and dates

    Licences

    Kensington street lined with brick townhouses and lit streetlamps beneath an orange dusk sky

    Send us the address of your house.

    We look up the conservation area, listing and Article 4 position, then reply with a fixed fee. A message before 3pm is answered the same working day.

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    Mansard roof drawings in Redbridge: SPD roof rules