020 7864 7245Request a fixed quote

Westminster, London

Architectural drawings in Westminster

Westminster has 4,015 list entries and 56 conservation areas. Our MCIAT chartered architectural technologists draw for homes here from £745 including VAT, and the heritage check always comes before the design.

Fixed quote after a free constraints check

  • MCIAT chartered
  • £2m PI insured
  • LABC Partnered
  • Fixed fees, VAT included

Request a fixed quote

We use it to check conservation areas and constraints.
Pick the council that decides your application.
A few lines: what you want to build, and anything the council has already said.
Add photos or drawings

Drop files here or choose from your device

PDF, JPG, PNG, DWG · up to 10 files, 90 MB in total

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

    Westminster in numbers

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Listed building entries4,015 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Conservation areas56 named conservation areas published by the council—planning.data.gov.uk
    Article 4 directions10 Article 4 directions published by the council—planning.data.gov.uk
    Tree preservation orders685 tree preservation orders published by the council—planning.data.gov.uk
    Households living in a house10.2 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk
    Owner-occupied households27.4 % of households owner-occupied (owned outright or with mortgage/loan)Census 2021nomisweb.co.uk
    Householder applications granted82 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications decided in time79 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Mayoral CIL charging band1 MCIL2 charging band (1-3)—london.gov.uk
    Mayoral CIL rate (indexed)96.97 £/m² (indexed, permissions granted in 2026)—london.gov.uk
    Local planCity Plan 2019-2040 (2026)—westminster.gov.uk
    Supplementary planning documentRoofs: a guide to alterations and extensions on domestic buildings SPG—westminster.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 Westminster

    Householder applications by street in Westminster

    Streets in Westminster with the most householder applications, and the share approved
    StreetApplicationsApproved
    Randolph Avenue1679%
    Ashworth Road1385%
    Clifton Hill1170%
    Ponsonby Place10100%
    Lancaster Mews938%
    Westbourne Park Road988%
    Carlton Hill886%
    Kilburn Lane886%
    Sutherland Place863%
    Wilton Row8100%
    Caroline Close733%
    Chester Row7100%
    Greenberry Street757%
    Hereford Road760%
    Hyde Park Gardens Mews775%
    Counts of householder applications by street; no individual applications are shown. Streets with fewer than five applications are left out.Source: GLA Planning London Datahub, householder applications, all years held. Contains public sector information licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2026.
    Constraints check: WestminsterConservation areas: 56 named conservation areas published by the council. Article 4 directions: 10 Article 4 directions published by the council. Listed building entries: 4,015 list entries (Historic England, within the LPA boundary)56Conservation areasA10Article 4 directionsB4,015Listed building entriesC

    Constraints check: Westminster

    What we check first on any Westminster address. Counts are for the whole council area.

    A · Conservation areas
    56 named conservation areas published by the council
    B · Article 4 directions
    10 Article 4 directions published by the council
    C · Listed building entries
    4,015 list entries (Historic England, within the LPA boundary)

    Architectural drawings in Westminster begin with heritage

    The listing breaks down as 205 at Grade I, 373 at Grade II* and 3,419 at Grade II. 1 World Heritage Site intersects the boundary, along with 28 registered parks and gardens.

    For an owner this changes the order of work. A listed house needs separate consent for most alterations, inside and out, and the application must explain what is significant about the building. We draw the existing house in enough detail to support that explanation.

    If your home is not listed it may still sit beside a listed neighbour, or inside a conservation area where changes visible from the street get close attention.

    Rows of brick terraced houses and gardens on a residential street

    Article 4, trees and the council's design guidance

    Westminster publishes 10 Article 4 directions, and the council records 685 tree preservation orders. A protected tree in a rear garden is a common reason a rear extension needs redesigning, so we look for them early.

    The development plan is the City Plan 2019-2040 (2026). Two older guides remain on the council's list for householders: Roofs: a guide to alterations and extensions on domestic buildings SPG and Mews: a guide to alterations SPG. The council notes that they refer to policy that predates the current framework, so we use them for their advice on form and materials, and take the rules themselves from the plan.

    Mews houses are a Westminster speciality. Their roofs, doors and ground-floor openings are tightly controlled, and a design that works in a terrace can fail in a mews.

    Who lives where: flats, leases and permitted development

    Just 10.2 per cent of the borough's 94,815 households live in a house, and only 27.4 per cent own their home. Most homes are therefore flats, and householder permitted development does not apply to flats.

    A lease usually adds a second layer of approval. The freeholder or managing agent will often want to see the same drawings as the council, plus the technical set, before agreeing to a licence for alterations.

    For the houses that remain, values are high. Terraced homes average £1,616,250 and detached houses £3,892,403 in the latest index, so every square metre of extension is worth taking seriously.

    How Westminster decides householder applications

    In the latest twelve months Westminster decided 366 householder applications and granted 82 per cent. Only 79 per cent were decided on time, so allow longer than the eight-week target when you plan a programme.

    Across every type of application the council decided 4,602 cases and granted 85.9 per cent. These figures describe the past, and they cannot tell you how your own house will be treated.

    The council search is the best source for local precedent. We read decisions on your street as part of the constraints check, and a recent approval at a similar house is a useful point of reference.

    Levy bands and certificates

    Westminster is in band 1 of the Mayor's levy at £96.97 per square metre for permissions granted this year. The borough levy is far higher, set out in the Westminster CIL Charging Schedule: £811.80/m² (Prime); £590.40/m² (Core); £295.20/m² (Fringe) [schedule rates £550, £400, £200]. Ask us to flag any liability early.

    The council logged 138 lawful development certificates in the latest year. For works that fit permitted limits, a Lawful Development Certificate in Westminster from £645 gives certainty.

    What we draw for Westminster homes

    Most clients begin with planning drawings in Westminster, and loft schemes follow with loft conversion drawings in Westminster. Afterwards come building regulations drawings in Westminster.

    Borders matter in central London, so see also Camden, Kensington and Chelsea and Lambeth.

    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.
    Georgian brick terrace with sash windows, arched fanlight doorways, stone steps and iron railings in London
    The street around you
    Move across the plinth — the blocks rise around the pointer.

    Nearby councils

    Questions

    Is my Westminster house listed?

    We check for free as the first step. The borough has 4,015 list entries, so the chance is real.

    How much are architectural drawings in Westminster?

    Householder planning drawings start at £745 including VAT. The council's fee is separate.

    Does Westminster have a guide for roof extensions?

    The council lists Roofs: a guide to alterations and extensions on domestic buildings SPG, though it warns that the guide predates the current policy framework.

    Can I extend a flat in Westminster under permitted development?

    No. Householder permitted development does not apply to flats, so an application is the normal route.

    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.

    Request a fixed quoteCall 020 7864 7245WhatsApp