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Haringey, London

HMO conversion drawings in Haringey

Haringey sets a floor-space bar before it will consider a house for HMO use: the policy permits conversion only where the original gross internal floor space is greater than 120m2. Our HMO conversion drawings in Haringey start from £995 including VAT, prepared by MCIAT chartered architectural technologists, and we measure the house before we design anything.

From £995 (VAT included)

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  • £2m PI insured
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  • Fixed fees, VAT included

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    Architectural model of a four-storey London stucco townhouse in its terrace, with a portico, area railings, sash windows, a cornice and chimney stacks
    The house as it stands: four storeys over a lower ground floor.Existing Proposed worksAn illustrative model, built for this page.

    How we work on hmo conversion drawings

    Seven steps from first call to approval.

    The same model cut through the middle: every floor, the stair, the chimney breasts, the new mansard, rear extension and basement in section
    Section through the model: every floor on one datum.

    1. Enquiry and constraints check

      We check the property against conservation areas, listed status, Article 4 directions, tree preservation orders, flood zone and planning history. We choose the right route and send a fixed quote.

    2. Measured survey

      We survey the house on one datum: rooms, levels, boundaries, drains, trees and the neighbours' windows that the 45° and 25° tests depend on.

    3. Design options

      We model the house in Revit and show you options in 3D and plan, with the planning strategy and the precedents in your street.

    4. Design frozen

      You choose an option in writing. Nothing changes after this without your say.

    5. Independent check

      A second chartered technologist checks every sheet against the council's validation checklist and the policy. A senior review signs it off before anything is submitted.

    6. Submission

      We prepare the forms, certificates, fee and documents and submit through the Planning Portal.

    7. Officer liaison

      We answer the planning officer and make any amendments within five working days, at no charge until approval.

    Free redraws until approval. Every drawing set is checked independently, and the checker is never the person who drew it.

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

    Haringey's floor-space rule for HMOs

    The council's Development Management policy on HMOs applies to small HMOs of three to six people inside the Article 4 area, as well as larger ones. It permits conversion only where the original gross internal floor space exceeds 120m2 and there is no harmful over-concentration of HMOs. Both conditions must be met.

    The measurement is of the house as originally built. Extensions added later do not count, so the first piece of work is a floor-area calculation from historic plans and our survey. A small terrace in Tottenham or Wood Green may fall short, and we say so at the free check rather than after the fee is spent.

    The Article 4 direction removes permitted development for small HMOs in the area mapped by the council. If your address is outside the mapped area, the national position that a change from C3 to C4 is permitted development may apply, and we confirm it before you rely on it.

    Red-brick mansion blocks and shopfronts on a street corner

    Local figures for Haringey

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Conversion to an HMO, including small HMOs (3-6 people) inside the Article 4 Direction area, is only permitted where the gross original internal floor space is greater than 120m2 and there is no harmful over-concentration of HMOs (Policy DM17 A).120m2—haringey.gov.uk, Development Management DPD 2017, p.36, Policy DM17 A
    Minor application decisions617 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Minor applications granted82.2 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Minor applications decided in time89.5 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Planning decisions, all types (PS2)1,469 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Planning applications granted, all types (PS2)85.2 % of decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Article 4 directions25 Article 4 directions published by the council—planning.data.gov.uk
    Conservation areas33 named conservation areas published by the council—planning.data.gov.uk
    Households living in a house38.9 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk
    Borough CIL residential rate£443.52/m² (Western zone); £276.16/m² (Central zone); £60.24/m² (Eastern zone)2026 indexed rate; schedule rates £368.12 / £229.21 / £50 (2022 schedule, index 332 to 400)haringey.gov.uk
    Article 4 direction for HMOs (C3 to C4)Yes—haringey.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 Haringey
    Building regulations, layer by layerPart A: structure: Approved Document A: Structure, 2004 edition incorporating 2004, 2010 and 2013 amendments. Part B: fire safety: All dwellings: fire detection and alarm system minimum Grade D2 Category LD3 (BS 5839-6), mains-operated smoke alarms to BS EN 14604. Part L: insulation: 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. Part K: stairs: 2.0 m clear headroom over stairs. Full plans application: Building control body must decide a full plans application within 5 weeks, or longer if agreed in writingPart A: structurePart B: fire safetyPart L: insulationPart K: stairsFull plans applicationABCDE

    Building regulations, layer by layer

    The Approved Documents that shape most house projects, from structure to the application itself.

    A · Part A: structure
    Approved Document A: Structure, 2004 edition incorporating 2004, 2010 and 2013 amendments
    B · Part B: fire safety
    All dwellings: fire detection and alarm system minimum Grade D2 Category LD3 (BS 5839-6), mains-operated smoke alarms to BS EN 14604
    C · Part L: insulation
    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
    D · Part K: stairs
    2.0 m clear headroom over stairs
    E · Full plans application
    Building control body must decide a full plans application within 5 weeks, or longer if agreed in writing

    What an HMO drawing set shows for Haringey

    The set shows existing and proposed floors with every bedroom measured, shared kitchens and bathrooms, escape routes and alarm positions. In Haringey we add an original-floor-area schedule, so the officer can verify the threshold without a request.

    Bedrooms are tested against the national sleeping-room figures: Sleeping rooms: at least 6.51 m² (one person over 10), 10.22 m² (two persons over 10), 4.64 m² (child under 10); floor under 1.5 m ceiling height not counted. Fire safety follows: All dwellings: fire detection and alarm system minimum Grade D2 Category LD3 (BS 5839-6), mains-operated smoke alarms to BS EN 14604. Licensing sits outside planning and covers larger households: Licence required for an HMO occupied by 5 or more persons in 2 or more households.

    The council's local plan framework is the Haringey Local Plan: Strategic Policies 2013-2026 (consolidated with 2017 alterations), with the Development Management DPD, Site Allocations DPD and Tottenham Area Action Plan, adopted in 2,013, so we cite the policy text itself.

    Haringey's application record

    A change of use to an HMO is normally a minor application. Haringey decided 617 in the latest year, granted 82.2 per cent and decided 89.5 per cent in time. For householder cases it granted 90.3 per cent of 689 decisions.

    Haringey's overall grant rate across all application types reached 85.2 per cent from 1,469 decisions in the Planning Statistics series. A borough-wide average says little about one house, so the evidence has to be on the page.

    Housing, heritage and protected land

    38.9 per cent of Haringey households live in a house or bungalow and 37.2 per cent own their home.

    There are 33 conservation areas and 25 Article 4 directions, and Historic England lists 289 buildings here. 21 entries sit on the Heritage at Risk Register. Green Belt covers 2 per cent of the borough.

    If your house is in a conservation area, changes to the front elevation, such as an extra door or bin store, are judged for their effect on the street, and we draw them accordingly.

    Levies, price and where to go next

    Haringey's levy is zoned: £443.52/m² (Western zone); £276.16/m² (Central zone); £60.24/m² (Eastern zone). The Mayoral levy is band 2, at an indexed £72.73 per square metre for permissions granted this year. Check liability for a conversion without new floor area with the council.

    The application is built on planning drawings in Haringey. For self-contained units rather than let rooms, see flat conversion drawings in Haringey. If you want to test a certificate route first, our lawful development certificates in Haringey page explains it.

    We also draw HMO conversions in Barnet, and the borough overview is architectural drawings in Haringey.

    We read the council's register at https://publicregister.haringey.gov.uk/pr/s/register-view?c__r=Arcus_BE_Public_Register for earlier HMO and conversion decisions near your address before we draw. The survey follows, then layouts in plan and 3D, and you choose one in writing before the design is frozen. A second chartered technologist checks each sheet, and we redraw at no charge until approval if officers ask for changes, without promising the outcome.

    What you receive

    Building regulations section drawing showing the construction build-up
    Sample drawing. Building regulations section showing construction build-up for a building control check.
    Pencil resting on a dimensioned technical drawing beside a scale rule
    Unit by unit
    Move up and down — the nearest units slide out.

    Other services in Haringey

    HMO conversion drawings nearby

    Questions

    What is Haringey's minimum floor space for an HMO?

    The policy allows conversion only where the original gross internal floor space is greater than 120m2, with no harmful over-concentration of HMOs.

    Do small HMOs need permission in Haringey?

    Inside the mapped Article 4 area, yes. Elsewhere the national rule applies: C3 to C4 is permitted development unless an Article 4 direction removes it.

    How many minor applications does Haringey grant?

    82.2 per cent of 617 decisions in the latest published year.

    Sources and dates

    City of London skyline glowing at dusk across the Thames under a dramatic orange sky

    Tell us about your property.

    We check the constraints, then send a fixed fee. Messages before 3pm get a reply the same working day.

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