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Sevenoaks, Kent

Architectural drawings in Sevenoaks

Around 93 per cent of the Sevenoaks district is Green Belt, which shapes how big a home can grow. We are MCIAT chartered architectural technologists, and our architectural drawings in Sevenoaks start from £745 including VAT. Every job begins with a free check of the designations on your address.

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    Sevenoaks in numbers

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Green Belt share of the council area93 % of council area covered by green-belt polygons—planning.data.gov.uk
    Conservation areas41 named conservation areas published by the council—planning.data.gov.uk
    Listed building entries1,659 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Scheduled monuments26 scheduled monuments intersecting the LPA boundary (Historic England)—planning.data.gov.uk
    Registered parks and gardens17 registered parks and gardens intersecting the LPA boundary (Historic England)—planning.data.gov.uk
    Householder decisions641 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted90.3 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications decided in time94.9 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Minor applications granted85.5 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Households living in a house84.1 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk
    Owner-occupied households71.5 % of households owner-occupied (owned outright or with mortgage/loan)Census 2021nomisweb.co.uk
    Average price, detached1,012,433 GBP2026-07publicdata.landregistry.gov.uk
    Lawful development certificate applications (PS1)205 certificates2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Supplementary planning documentResidential Extensions SPD2009sevenoaks.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 Sevenoaks
    Constraints check: SevenoaksConservation areas: 41 named conservation areas published by the council. Listed building entries: 1,659 list entries (Historic England, within the LPA boundary)41Conservation areasA1,659Listed building entriesC

    Constraints check: Sevenoaks

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

    A · Conservation areas
    41 named conservation areas published by the council
    C · Listed building entries
    1,659 list entries (Historic England, within the LPA boundary)

    Architectural drawings for Sevenoaks homes in the Green Belt

    Green Belt policy is the first question for most Sevenoaks extensions. Where it applies, the council weighs how much a house has already grown against the size of the original building. The district publishes a Green Belt SPD for exactly this test, and we read it before we draw a single line.

    That changes how we work. We measure the original house, add up past extensions, and show the proposed floor area against both on the application sheets. A clear comparison answers the officer's first question on page one.

    The council's Residential Extensions SPD sets the design expectations for the extension itself, and the Sevenoaks Residential Character Area Assessment SPD describes how each part of the district is meant to look. A scheme that follows both is easier to approve.

    Rows of brick terraced houses and gardens on a residential street

    Heritage in Sevenoaks: conservation areas and listed houses

    The district has 41 conservation areas, published by the council. In these areas the council can ask for materials, window patterns and roof pitches that match their surroundings.

    Historic England records 1,659 list entries here: 31 at Grade I, 91 at Grade II* and 1,532 at Grade II. One entry can cover several buildings, and a listed house needs separate consent for most alterations.

    The district also holds 26 scheduled monuments and 17 registered parks and gardens. If your property sits near one, we say so at the first call.

    What Sevenoaks homeowners usually build

    84.1 per cent of the 49,013 households here live in a house or bungalow, and 71.5 per cent own their home. With most homes owner-occupied houses, rear and side extensions, loft rooms and garden outbuildings are the natural projects here.

    Values make the work worthwhile. A semi-detached home averages £537,825 and a detached one £1,012,433, so extra space is often cheaper than moving. On larger plots, the Green Belt test then decides how much of the space you can use.

    How the council has decided householder applications

    Sevenoaks decided 641 householder applications in its latest published year and granted 90.3 per cent. In all, 94.9 per cent met the eight-week target or an agreed extension.

    Minor applications, which include many new homes and conversions, were granted at 85.5 per cent from 303 decisions. These are past results for the whole district, not a forecast for your plot.

    The council's own planning search lets you read decided cases in your road. We do that too, and we cite any near neighbour with a similar extension in the covering note.

    Prior approval and certificates in Sevenoaks

    Larger single-storey rear extensions can use the prior approval route. In the latest published year the council recorded 0 grants and 1 refusal for them, so the volume is tiny and hard to read as a trend.

    Lawful development certificates are far more common, with 205 certificates in the same period. A certificate gives you written proof that work was lawful, which matters when you sell.

    We use our Lawful Development Certificate drawings in Sevenoaks when the work is clearly permitted, and a full application when it is not.

    Where to go next in Sevenoaks

    Most clients start with planning drawings in Sevenoaks or rear extension drawings in Sevenoaks. Larger plots often need new build drawings, and the technical set follows as building regulations drawings in Sevenoaks.

    On the borders, we also cover Bromley, Dartford and Tandridge.

    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 Sevenoaks house in the Green Belt?

    About 93 per cent of the district is, so it is likely. We check your exact address for free before you pay, because it sets how much you can add.

    How much do architectural drawings cost in Sevenoaks?

    Householder planning drawings start at £745 including VAT, fixed and published in advance. The council's application fee is separate.

    Which guidance does Sevenoaks use for extensions?

    The Residential Extensions SPD and the Green Belt SPD, read with the Sevenoaks Residential Character Area Assessment SPD. We draw to all three.

    Do I need permission to extend a listed house in Sevenoaks?

    Usually yes, and listed building consent is a separate application. The district has 1,659 list entries, so tell us at the first call if yours is one.

    Sources and dates

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    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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