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

01Newham, London

Mansard roof drawings in Newham

A mansard changes the pitch of a roof, and Newham's home-extension SPD says new roof pitches should match the original house. That makes the case for a mansard here a matter of evidence on the street. We draw the existing roofline and the proposal together, from £845 including VAT.

From £845 (VAT included)

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    02The brief

    The two roof tests in Newham's SPD

    The Altering and Extending your Home SPD sets out the council's roof guidance. On what must stay, its short form is retain front slopes, ridges, parapets: street-facing slopes, ridge lines and chimneys, with parapets and eaves kept where practicable. On form, it asks you to match original pitch, with extensions kept subservient.

    A mansard replaces the original pitch, so the second test is the hard one for a house with a conventional roof. The case for it usually rests on a street where roof extensions already break the line. We survey the neighbours' roofs first and draw what the evidence supports.

    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 Newham

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Roof alterations should keep street-facing slopes, ridge lines and chimneys; retain parapets and eaves where practicableretain front slopes, ridges, parapetsNo periodnewham.gov.uk, Altering and Extending your Home SPD (adopted February 2018), general design principles
    New roof pitches should match the original house; extensions subservient with clear set-backsmatch original pitchNo periodnewham.gov.uk, Altering and Extending your Home SPD (adopted February 2018), general design principles
    Supplementary planning documentAltering and Extending your Home SPD2018newham.gov.uk
    Conservation areas9 named conservation areas published by the councilNo periodplanning.data.gov.uk
    Listed building entries125 list entries (Historic England, within the LPA boundary)No periodplanning.data.gov.uk
    Householder decisions388 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted86.9 %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
    Class AA, para AA.1(c)Class AA additional storeys exclude houses built before 1 Jul 1948 or after 28 Oct 2018No 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.

    Newham6 neighbouring councils
    Councils bordering Newham

    04The streets

    Householder applications by street in Newham

    Streets in Newham with the most householder applications, and the share approved
    StreetApplicationsApproved
    Hampton Road4077%
    Osborne Road3497%
    Claremont Road2365%
    Capel Road1988%
    Windsor Road1863%
    Field Road1580%
    Sherrard Road1586%
    Latimer Road1479%
    Monega Road1486%
    Sidney Road1492%
    South Esk Road1479%
    Lonsdale Avenue1383%
    Kensington Avenue1260%
    Tennyson Road1282%
    Bristol Road1170%

    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, Newham: set-back and parapet: retain front slopes, ridges, parapets. 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 Newham: set-back and parapet
    retain front slopes, ridges, parapets
    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

    Heritage layers on a Newham roof

    The council publishes 9 conservation areas, and Historic England records 125 list entries, 115 of them Grade II. Class AA is not available on article 2(3) land, so a house in one of the areas needs a planning application for an extra storey.

    A listed house needs consent for a roof change as well; the route is on the page for listed building consent drawings in Newham. Newham's data also records an Article 4 direction on HMO conversions (C3 to C4), which governs use and leaves the roof tests unchanged.

    Eaves, dates and the permitted development gap

    Class B permitted development expects the original eaves to be kept or put back, and a parapet-fronted mansard normally removes them. Class AA has date limits as well. Class AA additional storeys exclude houses built before 1 Jul 1948 or after 28 Oct 2018.

    Domestic gardens cover 16.9% of Newham's land in the GLA's older land-use data, so a rear roof storey sits close to the neighbours. We show the roof against both neighbours in section and elevation.

    How householder applications have gone

    Newham decided 388 householder applications in the latest return, and 86.9% were granted. That is a general guide to ordinary home alterations, and it says little about a mansard on its own.

    The council's householder fee is £548. Party structure notice at least 2 months before work, under the Party Wall etc. Act 1996.

    Next steps and neighbouring pages

    If the house also needs a lower floor, see basement conversion drawings in Newham. Across the border, mansard roof drawings in Redbridge cover a council whose SPD sets out its dormer limits in detail. The overview 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

    Will Newham accept a mansard on a terraced house?

    We cannot say how an officer will decide. The SPD asks you to match original pitch, so a mansard needs a clear case, and we say early in the constraints check whether your street offers one.

    Does Class AA let me add a storey in Newham?

    Only outside conservation areas and for houses within the date limits. Class AA additional storeys exclude houses built before 1 Jul 1948 or after 28 Oct 2018. Class AA is not available on article 2(3) land.

    What does the application cost?

    Our fee starts at £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

    86.9%

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

    Photograph: Lorenc Memaga

    09Further reading

    Other services in Newham

    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 Newham: roofline rules