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Epsom and Ewell, Surrey

Rear extension drawings in Epsom and Ewell

Epsom and Ewell publishes its householder tests as numbers: a maximum projection, a boundary wall height and daylight angles. Our rear extension drawings in Epsom and Ewell start from £679, and each of those numbers has a line on the drawings.

From £479 drawings + £200 survey (£679 total), no VAT to add

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  • Fixed fees, no VAT to add

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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 rear extension drawings

    Nine 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.

    8. Building regulations

      Technical drawings are coordinated with the structural engineer's calculations, the drainage and the planning conditions.

    9. Approval and hand-over

      Building control approval, then a next-steps pack covering the commencement notice, party wall timing and CIL.

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

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    The semi-detached test

    For a single-storey rear extension on a semi-detached house the council's householder guidance sets a maximum projection, a limit on the wall on the boundary (no higher than a stated figure with no windows) and a daylight angle measured from a stated height. The record reads: 3.25 m.

    The boundary wall rule is the one that surprises people. A solid wall on the boundary, no windows in it and kept low is acceptable; a taller wall or a window in the flank is not, however good the design is otherwise.

    We set out the extension from the neighbour's boundary and draw that wall explicitly, with its height and the angle test on the section.

    Brick house being extended, with a wide new opening supported over the ground floor

    Local figures for Epsom and Ewell

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Single storey rear extension onto a semi-detached single storey property: maximum projection 3.25 m, wall on boundary no higher than 2.5 m with no windows, 43 degree daylight angle from 2.5 m above ground.3.25 m—epsom-ewell.gov.uk, Epsom and Ewell Householder Applications SPG (Jan 2004), paras 9.1-9.3, p.7 of 9
    Single storey rear extension onto terraced properties: maximum projection 3.25 m; infilling beside an existing extension must satisfy a 45 degree plan angle and 25 degree angle from the horizontal at the neighbour's sill.3.25 m; 45 degrees—epsom-ewell.gov.uk, Epsom and Ewell Householder Applications SPG (Jan 2004), paras 11.1-11.4, p.8 of 9
    GPDO 2015 Sch 2 Pt 1 Class A, para A.1(f)(i)3 m (attached) / 4 m (detached) beyond the original rear wall, single storey—legislation.gov.uk
    Class A, para A.1(g)6 m (attached) / 8 m (detached), single storey, height max 4 m; not on article 2(3) land or an SSSI—legislation.gov.uk
    Householder: alterations/extensions to a single dwellinghouse, from 1 Apr 2026548 GBP—ribblevalley.gov.uk
    Larger home extension prior approvals granted3 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Larger home extension prior approvals refused0 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Green Belt share of the council area46 % of council area covered by green-belt polygons—planning.data.gov.uk
    Conservation areas28 named conservation areas published by the council—planning.data.gov.uk
    Listed building entries325 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Householder decisions411 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted86.9 %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

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

    Councils bordering Epsom and Ewell
    Single-storey rear extension: the permitted development limitsDepth beyond the original rear wall: 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey. Maximum height: 4 m. Within the zone near the boundary: Eaves no higher than 3 m where within 2 m of the curtilage boundary. Larger extension under prior approval: 6 m (attached) / 8 m (detached), single storey, height max 4 m; not on article 2(3) land or an SSSIABCD

    Single-storey rear extension: the permitted development limits

    The house in section with a rear extension; the dashed lines mark the zone near the boundary.

    A · Depth beyond the original rear wall
    3 m (attached) / 4 m (detached) beyond the original rear wall, single storey
    B · Maximum height
    4 m
    C · Within the zone near the boundary
    Eaves no higher than 3 m where within 2 m of the curtilage boundary
    D · Larger extension under prior approval
    6 m (attached) / 8 m (detached), single storey, height max 4 m; not on article 2(3) land or an SSSI

    The terrace test

    For terraced houses the same projection limit applies, and an infill beside an existing extension has to satisfy two angles, a plan angle and an angle from the horizontal at the neighbour's sill. The record reads: 3.25 m; 45 degrees.

    Terraced owners often want to fill the gap beside an old outrigger. That is the case where the angle tests do the most work, and where a drawn section through the neighbour's window decides the outcome.

    Permitted development and prior approval

    The national figures are larger: 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey as permitted development, and 6 m (attached) / 8 m (detached), single storey, height max 4 m; not on article 2(3) land or an SSSI by prior approval. The council's record on the longer route is 3 larger home extensions granted and 0 refused in the latest national statistics.

    Where the local projection is smaller than the permitted one, we explain the trade: a smaller extension by householder application, with its local tests, or a longer one under the permitted routes with their own conditions.

    Green Belt, heritage and decisions

    Green Belt covers 46 per cent of the borough, and there are 28 conservation areas and 325 list entries. The council decided 411 householder applications in the latest published year, granted 86.9 per cent and decided 94.9 per cent in time.

    The drawing set and what to read next

    A set shows existing and proposed plans, sections and elevations with the tests plotted. It starts at £679, fixed before you commit; the council's householder fee is £548, paid to the council.

    For the roof, see loft conversion drawings in Epsom and Ewell, and for the borough overview architectural drawings in Epsom and Ewell.

    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.
    Finished white-rendered rear house extension with large glazed doors
    Every side considered
    Flick across the turntable to spin it.

    Other services in Epsom and Ewell

    Rear extension drawings nearby

    Questions

    How far can a rear extension project in Epsom and Ewell?

    The council's guidance gives a maximum projection of 3.25 m for single-storey extensions, with boundary wall and daylight tests.

    What angles apply to terraced infill extensions?

    The record reads 3.25 m; 45 degrees.

    What does the council charge for a householder application?

    £548, paid to the council.

    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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