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

01Hackney, London

Mansard roof drawings in Hackney

A mansard in Hackney usually needs a householder planning application, because the permitted routes to a new roof storey are closed by the roof's own eaves, the age of the house and conservation area status. We draw the roof, the street elevation and the neighbours' rooflines to the council's tests, from £845 with VAT included.

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    02The brief

    What Hackney publishes for roofs, and what it does not

    We hold no Hackney figure for roof height, pitch or dormer size on file, and we do not substitute one. What the council does publish is its Residential extensions and alterations SPD, alongside Hackney Local Plan 2033 (LP33), and we read both against your street before drawing.

    Where the council gives no number, the tests that bind are the national ones in the next section.

    Brick cottage with a tiled roof, chimneys and a front dormer window
    Upper floors of a large yellow-brick Victorian house in London with chimney pots
    Photograph: Lorenc Memaga

    03The record

    Local figures for Hackney

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Conservation areas37 named conservation areas published by the councilNo periodplanning.data.gov.uk
    Article 4 directions77 Article 4 directions published by the councilNo periodplanning.data.gov.uk
    Listed building entries555 list entries (Historic England, within the LPA boundary)No periodplanning.data.gov.uk
    Class B, condition B.2(b)(i)(aa)Class B requires the original eaves to be maintained or reinstated, which a parapet-fronted mansard normally removesNo 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
    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
    Party Wall etc. Act 1996 s3(2)(a)Party structure notice at least 2 months before workNo periodlegislation.gov.uk

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

    Hackney6 neighbouring councils
    Councils bordering Hackney

    04The streets

    Householder applications by street in Hackney

    Streets in Hackney with the most householder applications, and the share approved
    StreetApplicationsApproved
    Winston Road5288%
    Osbaldeston Road3969%
    Rushmore Road3783%
    Forburg Road3165%
    Olinda Road3171%
    Durlston Road3089%
    Powerscroft Road3093%
    Brooke Road2874%
    Elderfield Road2580%
    Glyn Road25100%
    Kyverdale Road2576%
    Lavender Grove2477%
    Alkham Road2370%
    Clifden Road2391%
    Culford Road2376%

    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, Permitted development and the eaves: Class B requires the original eaves to be maintained or reinstated, which a parapet-fronted mansard normally removes. B, Additional storeys under permitted development: Class AA additional storeys exclude houses built before 1 Jul 1948 or after 28 Oct 2018. C, 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)ABC

    A mansard roof in section

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

    A Permitted development and the eaves
    Class B requires the original eaves to be maintained or reinstated, which a parapet-fronted mansard normally removes
    B Additional storeys under permitted development
    Class AA additional storeys exclude houses built before 1 Jul 1948 or after 28 Oct 2018
    C 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

    Why the permitted routes seldom fit a mansard

    Two national rules do most of the work. Class B requires the original eaves to be maintained or reinstated, which a parapet-fronted mansard normally removes. And for the upward-extension route: Class AA additional storeys exclude houses built before 1 Jul 1948 or after 28 Oct 2018.

    A conservation area closes the second route altogether. Class AA is not available on article 2(3) land. That leaves a householder application, for which the council's fee is £548, paid to the council separately from ours.

    Heritage layers on a Hackney roof

    Hackney designates 37 conservation areas and keeps a register of 77 Article 4 directions, and the national list holds 555 entries inside the borough. We check each layer in the free constraints check, before we price, because an early finding changes the route.

    A listed house needs a second application for the roof itself, covered under listed building consent drawings in Hackney.

    What the roof set contains

    Existing and proposed plans, sections and elevations of the roof, drawn on one surveyed datum, with the new roofline set against both neighbours. The Party Wall etc. Act 1996 adds a notice duty: Party structure notice at least 2 months before work.

    Building Regulations detail follows. 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). Loft conversions where 2.0 m cannot be achieved: 1.9 m at the centre of the stair, 1.8 m at the side (half width). A lower floor under the same house is a separate job, drawn under basement conversion drawings in Hackney.

    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

    Rear view of brick terraced houses in London with slate roofs and chimney stacks along the shared rooflineParty wall services
    Photograph: Ben Hadfield
    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 add a mansard to a Hackney house under permitted development?

    Rarely. Class B requires the original eaves to be maintained or reinstated, which a parapet-fronted mansard normally removes. A conservation area also rules out the upward-extension class. The free constraints check tells you which applies to your address.

    Does a mansard in a Hackney conservation area need anything extra?

    It needs planning permission rather than a permitted route, because Class AA is not available on article 2(3) land. If the house is also listed it needs listed building consent as well.

    What does the mansard drawing set cost?

    Mansard roof drawings start at £845 with VAT included. The council's application fee is separate. Our full route for period roofs is on the mansard roof drawings hub.

    Converted loft bedroom with roof windows and a Juliet balcony

    37

    named conservation areas published by the council

    Conservation areas, Hackney. Source: planning.data.gov.uk

    Photograph: Imad Clicks

    09Further reading

    Other services in Hackney

    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 Hackney