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Ealing, London

House extension drawings in Ealing

House extension drawings for an Ealing home start at £695 including VAT. Ealing publishes a dedicated guide to residential extensions, and it tests two things before almost any other: how deep the extension goes, and how much garden is left afterwards.

From £695 (VAT included)

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    Finished white-rendered rear house extension with large glazed doors

    Ealing's own rules for house extensions

    The council's SPD 4 - Residential extensions is the document planning officers apply to a householder extension. For a single-storey rear extension it treats 3 m deep; 3 m high as the acceptable size in most cases, where the house has not been extended before and lines up with its neighbour. Detached houses may go further.

    The garden test is separate and just as firm. The guide says an extension must not reduce the garden below 50 m2 / 75 m2, the smaller figure for a house with fewer habitable rooms and the larger for a bigger one. A long rear extension on a modest plot can therefore fail on garden size even when its depth is acceptable.

    Side extensions get their own limit: a single-storey side extension should follow the depth of the house, be set back from the frontage and keep to 3 m height. For two storeys the guide asks for 1 m set-back; 1 m from boundary; 0.5m ridge set-down, and it does not encourage two-storey side extensions in the first place.

    Two-storey rear extension under construction on a semi-detached house

    Local figures for Ealing

    Figures with their unit, period and source
    MeasureValuePeriodSource
    In most cases a single-storey rear extension up to 3 metres deep and 3 metres high is acceptable where the house has not been extended and aligns with its neighbour; detached houses may go larger.3 m deep; 3 m high—ealing.gov.uk, SPD 4 Residential Extensions, p.14
    An extension must not reduce the garden below 50 m2 for a house with under 5 habitable rooms, or 75 m2 for a larger house (UDP Table 5D).50 m2 / 75 m2—ealing.gov.uk, SPD 4 Residential Extensions, p.15; p.10
    Single-storey side extensions should generally follow the depth of the house, be set back from the frontage and be no more than 3 metres high.3 m height—ealing.gov.uk, SPD 4 Residential Extensions, p.11
    Two-storey side extensions are not encouraged; where proposed they should be set back at least one metre from the front wall at first floor, set in at least one metre from the side boundary, and have a ridge at least 0.5m below the main ridge.1 m set-back; 1 m from boundary; 0.5m ridge set-down—ealing.gov.uk, SPD 4 Residential Extensions, p.11-12
    Conservation areas31 named conservation areas published by the council—planning.data.gov.uk
    Green Belt share of the council area6 % of council area covered by green-belt polygons—planning.data.gov.uk
    Listed building entries309 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Householder decisions946 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted87.2 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications decided in time95.3 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Larger home extension prior approvals granted18 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Larger home extension prior approvals refused70 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Supplementary planning documentSPD 4 - Residential extensions—ealing.gov.uk
    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
    Householder: alterations/extensions to a single dwellinghouse, from 1 Apr 2026548 GBP—ribblevalley.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 Ealing

    Householder applications by street in Ealing

    Streets in Ealing with the most householder applications, and the share approved
    StreetApplicationsApproved
    Brentham Way4290%
    Corringway3476%
    Bilton Road2889%
    Norwood Road2872%
    Ashbourne Road2783%
    Fielding Road2689%
    Tentelow Lane2571%
    Brunswick Road24100%
    Ludlow Road2491%
    Meadvale Road2395%
    St Albans Avenue2391%
    Woodfield Road23100%
    Denison Road21100%
    Laughton Road2183%
    Rusthall Avenue2185%
    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.
    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

    What Ealing's guide rules out

    Some answers are firmer than others. The guide treats roof terraces and balconies on extensions as unacceptable in most cases, because of overlooking, so a flat roof that looks like a terrace opportunity should be drawn as a flat roof and nothing more.

    Inside conservation areas the stance tightens. Rear extensions there should not span the full width of the house, and wraparound side-and-rear extensions are discouraged and usually refused. Ealing has 31 conservation areas, so this is a live constraint for many owners, not a footnote.

    Two-storey rear extensions must look subordinate and, where possible, sit back from shared boundaries. Those that harm a neighbour's light, outlook or privacy will not be permitted, which is why we test the neighbours' windows on the survey.

    Permitted development or planning permission in Ealing

    The national rule allows a single-storey rear extension of 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey, no higher than 4 m. The guide's figure applies to planning applications, so a project beyond the permitted limits still has a route: a householder application, set out in our planning drawings in Ealing.

    Prior approval offers more depth, 6 m (attached) / 8 m (detached), single storey, height max 4 m; not on article 2(3) land or an SSSI, but Ealing's record shows it is hard to win. In the latest published year the council granted 18 larger home extension prior approvals and refused 70.

    Where the house qualifies for permitted development, a Lawful Development Certificate in Ealing is worth having before the build begins. Green Belt covers 6 per cent of the borough, so check that too if your house is near its edge.

    How Ealing has been deciding householder applications

    Ealing decided 946 householder applications in its latest published year and granted 87.2 per cent. 95.3 per cent were decided within eight weeks or an agreed extension. Those figures cover all householder work, so they tell you about the council and not about your plans.

    What the drawings include and what they cost

    An Ealing set contains existing and proposed floor plans, elevations and sections, plus location and block plans, with the garden area shown so the council can check it against its guide. Extension drawings start at £695 with VAT included, fixed before you commit.

    A second chartered technologist checks every sheet before submission. If the council asks for changes, we redraw at no charge until approval. The council's application fee, £548 for a householder case, is paid to the council.

    If the work touches a shared wall or digs near a neighbour's foundations, the Party Wall Act applies: Adjacent excavation notice at least 1 month before work: within 3 m and deeper than the neighbour's foundations, or within 6 m and cutting a 45° line from their foundations.

    Other extension types and nearby boroughs

    To look at one shape, see rear extension drawings in Ealing, side return extension drawings in Ealing or wraparound extension drawings in Ealing. For everything we do in the borough, start at architectural drawings in Ealing.

    Next door, the guidance differs. Compare house extension drawings in Hounslow, in Brent or in Hillingdon, or see the London-wide guide to house extension drawings.

    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.
    House extension under construction with scaffolding, new glazed doors and building materials
    Every side considered
    Flick across the turntable to spin it.

    Questions

    How deep can a rear extension be in Ealing?

    Ealing's extensions guide treats 3 m deep; 3 m high as acceptable in most cases for a single-storey rear extension. Permitted development can allow more on some houses, and detached houses may go larger.

    How much garden must I keep after an extension in Ealing?

    The guide asks for at least 50 m2 / 75 m2, depending on the size of the house. We show the remaining garden area on the drawings.

    Can I build a wraparound extension in an Ealing conservation area?

    Ealing's guide says wraparound extensions are discouraged in conservation areas and usually refused, so a different layout is normally needed.

    How much do house extension drawings cost in Ealing?

    From £695 including VAT, fixed up front. Council fees are separate.

    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.