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Havering, London

Rear extension drawings in Havering

Havering's extensions guide sets the usual rear depth at 3 m terrace / 4 m semi or detached; 45 degrees, and Green Belt covers 53 per cent of the borough, so where your house stands matters as much as how big the extension is. Our rear extension drawings for Havering 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 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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    House extension under construction with scaffolding, new glazed doors and building materials

    What Havering's extensions guide says about the back of a house

    The council's Residential Extensions and Alterations SPD gives a plain general rule: rear extensions go up to 3 m terrace / 4 m semi or detached; 45 degrees. The first figure applies to a terraced house, the second to a semi-detached or detached one, and any greater depth must sit inside a 45 degree angle taken from the boundary at that point.

    Height has its own line. A single-storey extension is generally held to 3 m with a flat roof, and a hip-pitched roof is expected to fall away from the boundary so the wall facing your neighbour stays low.

    The angle is the part most owners have not met. It makes extra depth possible on a wide plot, as long as the additional length lies within the line. We draw that line on the plan, so the officer can see it is respected without measuring anything.

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

    Local figures for Havering

    Figures with their unit, period and source
    MeasureValuePeriodSource
    As a general rule, rear extensions go up to 3 m deep for a terrace house and 4 m for a semi-detached or detached house; greater depth must sit within a 45 degree angle from the 3 m or 4 m point on the boundary.3 m terrace / 4 m semi or detached; 45 degrees—havering.gov.uk, Havering Residential Extensions and Alterations SPD 2011, p.19, para 5.3
    Total height of a single storey extension generally no more than 3 m with a flat roof; hip pitched roofs away from the boundary.3 m—havering.gov.uk, Havering Residential Extensions and Alterations SPD 2011, p.20, para 5.6
    Green Belt share of the council area53 % of council area covered by green-belt polygons—planning.data.gov.uk
    Conservation areas11 named conservation areas published by the council—planning.data.gov.uk
    Listed building entries146 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Householder decisions985 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted85.9 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications decided in time97.8 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Larger home extension prior approvals granted21 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)19.5 % of land that is domestic garden (GLUD 2005)2005data.london.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

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

    Councils bordering Havering
    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

    Long suburban gardens and neighbours' extensions

    Many Havering houses have room behind them for some depth, but a neighbour's conservatory or kitchen extension may already be in place. We survey what the neighbours have built first, because it affects both the angle test and the boundary wall height.

    Domestic gardens cover 19.5 per cent of the borough's land in the Greater London Authority's land-use data, and the garden you keep deserves a place on the drawing.

    Roof choice is a design decision with planning consequences. A flat roof keeps the boundary low, a hip can echo the main roof, and a lantern lets light into a deep plan. We model your preference against the height guide and show the section, so you can judge it before committing.

    Green Belt, heritage and the route to permission

    Green Belt polygons cover 53 per cent of Havering. A house inside them is judged against a proportionality test stricter than the ordinary design guide, and we check the boundary before suggesting a size.

    The borough also has 11 conservation areas and 146 listed building entries. An ordinary suburban house may still qualify for permitted development, and a deeper extension can use prior approval; the latest return shows 21 larger home extension prior approvals granted and 27 refused.

    Otherwise the route is a householder application, with a council fee of £548, paid to the council apart from our fixed fee. Where the garden backs onto open land we also draw the extension in its setting, since that changes what an officer expects to see from the rear.

    How quickly Havering decides householder applications

    Havering decided 985 householder applications in its latest published year and granted 85.9 per cent. 97.8 per cent were decided within the target or an agreed extension.

    That pace helps when you are lining up a builder, but the figures cover every kind of householder project and say nothing certain about one house. We use them to plan the programme, not to promise a result. Starting the building regulations drawings while the application is with the council means the structural and thermal details are ready when permission arrives.

    What we draw, what it costs and what follows

    A Havering set includes existing and proposed plans, elevations and sections, with a location plan and a block plan. The fee starts at £695 with VAT included, fixed before you commit. A second chartered architectural technologist checks every sheet, and we redraw free of charge if the council asks for changes.

    For the borough overview, see architectural drawings in Havering. For the national picture, read our general guide to rear extension drawings in London.

    Related projects and neighbouring councils

    A first-floor addition is a different project; see double-storey extension drawings in Havering. To compare every shape, read house extension drawings in Havering.

    Across the boundary the guidance differs in Barking and Dagenham, Redbridge and Thurrock.

    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 Havering

    Rear extension drawings nearby

    Questions

    How deep can a rear extension be in Havering?

    The council's guide sets 3 m terrace / 4 m semi or detached; 45 degrees. The first figure is for terraced houses, the second for semi-detached and detached, and greater depth must sit within the angle line.

    How high can a single-storey extension be in Havering?

    Generally no more than 3 m with a flat roof, with hip pitched roofs sloping away from the boundary.

    Does Green Belt affect extensions in Havering?

    Yes. Green Belt covers 53 per cent of the borough, and extensions there are tested for proportionality.

    How much do rear extension drawings cost in Havering?

    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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