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Barking and Dagenham, London

House extension drawings in Barking and Dagenham

Barking and Dagenham granted 66.5 per cent of householder applications in its latest year, so an extension here needs drawings that already respect the council's 3.65 m rear limit. Our house extension drawings for the borough start at £695 including VAT.

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 house 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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    Finished white-rendered rear house extension with large glazed doors

    House extension drawings in Barking and Dagenham: the SPD limits

    The borough's yardstick is the Residential Extensions and Alterations SPD, read alongside the Barking and Dagenham 2037 Local Plan, adopted in 2,024. On a terrace or a semi, a single-storey rear extension should not normally pass 3.65 m from the original back wall. A longer room is possible only if it stays inside a line drawn from the nearest corner of the adjoining house.

    Height and garden are capped in the same paragraph of the guide: 3 m flat / 3 m eaves / 4 m ridge; 50% garden. The garden test counts earlier extensions and sheds as well as the new work, so a plot already carrying a big outbuilding may have less room than the plan suggests.

    At first floor the test is angular. A rear addition upstairs must stay within 45 degrees drawn from the corner of the neighbouring house or its extension, and flat roofs are unwelcome in most cases. On a semi, the first floor of a side addition is set back 1 m from the main front wall.

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

    Local figures for Barking and Dagenham

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Terraced or semi-detached: single storey extensions should not normally exceed 3.65 m from the original rear wall; greater depth only within a 45 degree angle from the corner of adjacent dwellings.3.65 m—lbbd.gov.uk, Barking and Dagenham Residential Extensions and Alterations SPD 2012, p.10, para 5.3.2(a)
    Height: flat roof max 3 m; pitched roof eaves max 3 m and ridge max 4 m. Extensions should not normally cover more than 50% of the garden, including existing extensions and outbuildings.3 m flat / 3 m eaves / 4 m ridge; 50% garden—lbbd.gov.uk, Barking and Dagenham Residential Extensions and Alterations SPD 2012, p.11, para 5.3.2(d), (f)
    A first-floor rear extension must not extend beyond a 45 degree angle taken from the corner of the adjoining property (or its extension); flat roofs unacceptable in most cases; also 50% garden limit.45 degrees—lbbd.gov.uk, Barking and Dagenham Residential Extensions and Alterations SPD 2012, p.12-13, para 5.3.3(b)-(d)
    Semi-detached side extensions set back at least 1 metre at first floor from the main front wall; first floor of side extensions should be set off the side boundary where gaps are characteristic.1 m—lbbd.gov.uk, Barking and Dagenham Residential Extensions and Alterations SPD 2012, p.14-15, paras 5.4.2-5.4.3
    Larger home extension prior approvals granted10 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Larger home extension prior approvals refused36 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Householder decisions388 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted66.5 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Conservation areas4 named conservation areas published by the council—planning.data.gov.uk
    Article 4 directions3 Article 4 directions published by the council—planning.data.gov.uk
    Green Belt share of the council area14 % of council area covered by green-belt polygons—planning.data.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 Barking and Dagenham

    Householder applications by street in Barking and Dagenham

    Streets in Barking and Dagenham with the most householder applications, and the share approved
    StreetApplicationsApproved
    Westrow Drive5162%
    Upney Lane3579%
    Beccles Drive3467%
    Lyndhurst Gardens2862%
    Blake Avenue2270%
    Western Avenue2250%
    Salisbury Avenue2174%
    Lichfield Road1956%
    Melford Avenue1975%
    Rugby Road1958%
    East Road1861%
    Fanshawe Crescent1871%
    Marston Avenue1872%
    Sandringham Road1871%
    Woodbridge Road1869%
    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

    Becontree and the character of the housing

    The Becontree cottage estate has a dedicated council document, the Becontree Estate SPD and Design Code. Where a house sits inside the estate, its front, roof line and plot rhythm matter as much as the back garden, so we read that code before we draw the street elevation.

    Houses make up 68.8 per cent of households and domestic gardens cover 22.8 per cent of the land. The same layout repeats along whole roads, so a neighbour's earlier extension is the best evidence of what the officer has already accepted.

    What the decision record says about risk

    Of 388 householder decisions in the latest year, 66.5 per cent were granted, and every one was decided in time (100 per cent). Speed is dependable here, but roughly a third of cases were not granted, which is why we resolve the neighbour and garden tests before submission.

    The permitted-development prior approval route, for deeper single-storey rear extensions, is far harder. The council granted 10 and refused 36 in its latest published year. Unless neighbours are clearly content, we usually steer clients to a householder application drawn to the SPD, as set out in our planning drawings for Barking and Dagenham.

    Heritage, Green Belt and Article 4 checks

    The borough has 4 conservation areas, 49 listed entries and 3 Article 4 directions, and about 14 per cent of the area is Green Belt. A direction can remove permitted development rights in the area it maps.

    We mark each layer on the location plan before the design starts. If the house turns out to be affected, the drawing set changes in kind, not just in detail.

    Fee, deliverables and the next stage

    We charge £695, VAT included, fixed before you commit. The set has existing and proposed plans, elevations and sections, a location plan and a block plan. The council's householder fee, currently £548, goes straight to Barking and Dagenham.

    Energy limits apply to everything new: 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. When planning is settled, our building regulations drawings in Barking and Dagenham carry the same design into construction detail, and the loft conversion drawings show the alternative of building up.

    How a Barking and Dagenham job runs

    We start with a measured survey, because the SPD counts from the original rear wall and an earlier lean-to or kitchen may already sit beyond it. Original and later work are separated on the existing plans so nobody argues about the starting point.

    Then we test two or three shapes in 3D against the corner line of the next-door house. The comparison is written down before the design is fixed. A second chartered technologist checks the sheets for dimensions and consistency, and we issue a set the validation team can read without a call.

    If the council raises a point, we amend the drawings within the same fee. Neighbouring councils measure differently, so compare Havering and Newham, or return to the house extension drawings hub and the borough overview at architectural drawings in Barking and Dagenham.

    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.

    Other services in Barking and Dagenham

    House extension drawings nearby

    Questions

    How deep can a single-storey extension be in Barking and Dagenham?

    The SPD gives 3.65 m from the original rear wall on a terrace or semi, with more only inside the corner line it describes.

    Does the council often refuse larger home extensions?

    In its latest published year it refused 36 larger home extension prior approvals and granted 10, so we check the neighbours first.

    What do house extension drawings cost here?

    From £695 including VAT, fixed before you commit. The council fee is paid to the council.

    Does the Becontree estate code affect an extension?

    It can, particularly for the front and roof line. We read the Becontree Estate SPD and Design Code before drawing.

    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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