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Rows of brick terraced houses and gardens on a residential street

Hounslow, London

Change of use drawings in Hounslow

Hounslow's Class E direction is among the newest in London, and it came into force while many investors were still assuming the permitted route was open. Our change of use drawings in Hounslow start from £879, and we check whether your unit is inside the specified areas before you plan the layout.

From £679 drawings + £200 survey (£879 total), no VAT to add

  • MCIAT chartered
  • £2m PI insured
  • LABC Partnered
  • Fixed fees, no VAT to add

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We use it to check conservation areas and constraints.
Pick the council that decides your application.
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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 change of use 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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    A recent direction with a long consultation

    The council's Article 4 page records the Class MA and Class ZA direction as confirmed 4 March 2025, in force 22 April 2025. It was made after a six-week consultation, and the council confirmed it only after taking the representations into account.

    It removes two rights. Class MA covers commercial, business and service premises turning into dwellings; Class ZA covers demolishing certain commercial buildings and replacing them with homes. Both now need full applications in the specified areas.

    The areas are town centres, large and small neighbourhood centres, strategic industrial locations, locally significant industrial sites and key office locations. Outside them, the national route remains: Class E to C3 by prior approval after 2 years' continuous Class E use.

    Georgian brick terrace with sash windows, arched fanlight doorways, stone steps and iron railings in London

    Local figures for Hounslow

    Figures with their unit, period and source
    MeasureValuePeriodSource
    The direction removing the Class MA right (Class E to dwellings) and the Class ZA demolition right was made on 17 April 2024, consulted on from 19 April to 31 May 2024, confirmed on 4 March 2025 and came into force on 22 April 2025, for the specified areas.confirmed 4 March 2025, in force 22 April 2025—hounslow.gov.uk, Council page: Article 4 Directions, Class MA and ZA direction
    A borough-wide Article 4 direction removes the right to change a family home to a small HMO; it comes into force on 4 September 2023 and applies when three or more people in separate households newly occupy the property after that date. The council will not enforce against existing HMOs.borough-wide from 4 September 2023—hounslow.gov.uk, Council FAQ: Dwellinghouses to Small HMOs Article 4 Direction, implementation date answers
    Additional HMO Licensing was designated on 11 September 2025 and applies borough-wide: from 11 December 2025 all HMOs in Hounslow must be licensed under it, unless exempt.all HMOs from 11 December 2025—hounslow.gov.uk, HMO Licensing Policy 2025, additional licensing section
    Sch 2 Pt 3 Class MA, para MA.1(1)(b)Class E to C3 by prior approval after 2 years' continuous Class E use—legislation.gov.uk
    GPDO 2015 art 3(9A)Homes created under PD must meet the nationally described space standard—legislation.gov.uk
    Approved Document E 2003 incl. 2015, Table 0.1aSeparating walls 43 dB DnT,w+Ctr (min); floors and stairs 43 dB airborne (min), 64 dB L'nT,w impact (max) for dwellings formed by material change of use—gov.uk
    TCPA 1990 s55(3)(a)Using a single dwellinghouse as two or more dwellinghouses is a material change of use—legislation.gov.uk
    Change of use of a building to one or more separate dwellinghouses, not more than 10: per dwellinghouse, from 1 Apr 2026610 GBP per dwelling—ribblevalley.gov.uk
    Households living in a house54 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk
    Green Belt share of the council area22 % of council area covered by green-belt polygons—planning.data.gov.uk
    Minor application decisions312 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Minor applications granted72.4 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Minor applications decided in time97.1 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Conservation areas33 named conservation areas published by the council—planning.data.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 Hounslow
    Which application your project needsLawful Development Certificate decision: 8 weeks. Prior approval decision: 42 days. Householder decision: 8 weeksYour projectWithin permitted development?Lawful Development CertificatePrior approvalHouseholder applicationYesLarger rear extensionNoABC

    Which application your project needs

    The usual route for a house; flats and listed buildings follow other rules.

    A · Lawful Development Certificate decision
    8 weeks
    B · Prior approval decision
    42 days
    C · Householder decision
    8 weeks

    Shared houses: the borough-wide rule

    For houses turned into shared lets, Hounslow's direction is borough-wide from 4 September 2023, and additional licensing is all HMOs from 11 December 2025. See HMO conversion drawings in Hounslow.

    Splitting a house into flats is its own route, because Using a single dwellinghouse as two or more dwellinghouses is a material change of use. See flat conversion drawings in Hounslow.

    Standards the layout must meet

    New homes must meet the space standard: Homes created under PD must meet the nationally described space standard. Between floors, Separating walls 43 dB DnT,w+Ctr (min); floors and stairs 43 dB airborne (min), 64 dB L'nT,w impact (max) for dwellings formed by material change of use.

    Hounslow has 54 per cent of households in houses and Green Belt covers 22 per cent of the borough. Many conversion candidates are small vacant office units at the edge of centres, where noise from aircraft and roads adds to the sound brief.

    The council's record and fees

    Hounslow decided 312 minor applications in the latest published year, granted 72.4 per cent and decided 97.1 per cent in time. It has 33 conservation areas.

    The fee to change a building to separate dwellings is £610 each in a scheme of not more than ten, paid to the council.

    Next steps

    For the borough overview see architectural drawings in Hounslow. The prior approval drawings page covers the permitted route where it is open.

    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.
    Brick cottage with a tiled roof, chimneys and a front dormer window
    The street around you
    Move across the plinth — the blocks rise around the pointer.

    Other services in Hounslow

    Change of use drawings nearby

    Questions

    When did Hounslow's Class E direction take effect?

    The council records it as confirmed 4 March 2025, in force 22 April 2025.

    Which areas are covered?

    Town centres, neighbourhood centres, strategic and locally significant industrial sites and key office locations, as mapped by the council.

    Do small HMOs need permission in Hounslow?

    Yes: the borough-wide direction is borough-wide from 4 September 2023.

    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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