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Enfield, London

Rear extension drawings in Enfield

In Enfield the first question is which rules still apply to your address, before depth comes into it. Our rear extension drawings for Enfield houses start at £695 including VAT, and we begin by checking the green belt map and the borough's 33 Article 4 areas, because either can change what the national allowances give you.

From £695 (VAT included)

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

    How Enfield judges a rear extension

    We only quote a council rule when we can point to the page of the council's own document. For rear extensions in Enfield we hold no depth or garden figure of that kind, so we state none. The working yardstick is the national permitted development limit, and anything beyond it is a matter of judgement on neighbour impact and character.

    That judgement rests on things a drawing can show: how far the new wall projects beyond the neighbours' back walls, how tall the flank wall is along the boundary, and where the nearest windows sit. Each goes on the plan or section, with the original rear wall marked, because earlier extensions use up the allowance.

    Where you intend to rely on national rights, we first confirm that no Article 4 direction on your street has taken them away.

    Finished white-rendered rear house extension with large glazed doors

    Local figures for Enfield

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Green Belt share of the council area37 % of council area covered by green-belt polygons—planning.data.gov.uk
    Article 4 direction areas33 Article 4 direction area polygons published by the council—planning.data.gov.uk
    Conservation areas24 named conservation areas published by the council—planning.data.gov.uk
    Listed building entries301 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Householder decisions934 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted83.4 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Larger home extension prior approvals granted35 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Larger home extension prior approvals refused27 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Domestic gardens share of land (GLUD 2005)21.7 % of land that is domestic garden (GLUD 2005)2005data.london.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
    Approved Document L Vol 1 2021, para 10.7(d)Windows, roof windows, rooflights and doors in an extension should not exceed 25% of the extension floor area plus the area of openings removed or covered—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 Enfield

    Householder applications by street in Enfield

    Streets in Enfield with the most householder applications, and the share approved
    StreetApplicationsApproved
    Lonsdale Drive4385%
    Wynchgate3784%
    Prince George Avenue3583%
    South Lodge Drive3274%
    Old Park Ridings2964%
    The Chine2966%
    Beech Hill Avenue2876%
    Chase Road2856%
    Lakenheath2870%
    Lancaster Avenue2877%
    Winchmore Hill Road2875%
    Conway Road2778%
    Merryhills Drive2785%
    Derwent Road2573%
    Woodland Way2567%
    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

    The larger home extension route in Enfield

    Nationally, a single-storey rear extension may reach 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey, and the larger home extension scheme goes further, to 6 m (attached) / 8 m (detached), single storey, height max 4 m; not on article 2(3) land or an SSSI. Enfield is a heavy user: its latest twelve months of national statistics show 35 granted against 27 refused.

    A split that close means neighbours here do respond when the council writes to them, and an objection turns the officer's attention to the effect on the adjoining house. For that reason we prepare a short neighbour-impact sheet even though the application itself is brief.

    The scheme covers the single-storey extension only. A scheme with a second floor needs full permission, and the two-storey version is set out under double-storey extension drawings in Enfield.

    If the council has not notified a decision within 42 days of receiving the information, the national rule allows work to begin. We would still wait for the written decision, since a late objection can turn into a refusal.

    Green belt, conservation and Article 4 in Enfield

    Green belt covers 37 per cent of the borough, and a house inside it faces the test that extensions must not be disproportionate to the original building. The map comes first and the depth follows.

    The council publishes 24 conservation areas and has mapped 33 Article 4 direction areas, and Historic England lists 301 entries. A listed house needs separate consent for work to its back wall, so we flag that on the first call.

    Enfield's housing and its householder record

    Houses account for 61.2 per cent of Enfield households and domestic gardens cover 21.7 per cent of the borough's land, which is why a rear extension is an everyday project here.

    The council decided 934 householder applications in its latest published year, granting 83.4 per cent, with 92.4 per cent decided within eight weeks or an agreed extension. That describes the past, and it is no promise for any one house.

    Building regulations and levy on an Enfield extension

    Whichever planning route you take, the Building Regulations apply. The limiting values for new elements are: New elements in existing dwellings, limiting U-values W/(m²·K): roof 0.15, wall 0.18, floor 0.18, windows 1.4 (or WER Band B), doors 1.4. Large openings are capped too: Windows, roof windows, rooflights and doors in an extension should not exceed 25% of the extension floor area plus the area of openings removed or covered.

    On cost, Residential extensions and annexes can claim exemption (claim before commencement), and for a householder scheme the biodiversity rule is: Householder applications are exempt from biodiversity net gain. We note both in the handover so nothing surprises you after a decision.

    The Enfield drawing set and its fee

    A set holds existing and proposed plans, sections and elevations with location and block plans. The fee starts at £695, VAT included and fixed before you commit. A second chartered architectural technologist checks every sheet and we redraw free of charge if the council asks for changes. The council's householder fee is £548, paid separately.

    Nearby projects and councils

    For the borough as a whole see architectural drawings in Enfield. A room in the roof above the extension is covered by loft conversion drawings in Enfield. Neighbouring councils include Barnet and Haringey.

    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.
    Two-storey rear extension under construction on a semi-detached house
    Every side considered
    Flick across the turntable to spin it.

    Other services in Enfield

    Rear extension drawings nearby

    Questions

    Is the larger home extension route common in Enfield?

    Yes. The latest national figures show 35 granted and 27 refused.

    Does green belt affect my rear extension in Enfield?

    It can. Green belt covers 37 per cent of the borough, and extensions there must not be disproportionate to the original building.

    How much do rear extension drawings cost in Enfield?

    From £695 including VAT, fixed before you commit.

    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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