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Sutton, London

Wraparound extension drawings in Sutton

Sutton is the kind of borough where a wraparound extension has room to work: gardens cover 34.5 per cent of the land, and the council has only 8 conservation areas. Our wraparound extension drawings for Sutton houses start at £1,195 including VAT, and they are written to use that room without losing the permitted development rights most Sutton homes still hold.

From £1,195 (VAT included)

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  • Fixed fees, 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 wraparound 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

    Space is on your side in Sutton

    Domestic gardens make up 34.5 per cent of Sutton's land, and 62.9 per cent of households live in a house. Many plots are deep enough that an L-shaped extension leaves a proper garden behind it, which makes the question of how much to build more open than in the inner boroughs.

    With more room comes a different risk. A wraparound that fills the side and back may be allowed on paper while leaving a tight, overshadowed garden. We draw the garden as carefully as the building, with a terrace, a path to the rear boundary and the trees that stay.

    Owner occupation is high at 64.4 per cent of households, so most clients are building for themselves. The drawings are set out accordingly: one main living space opening onto the garden, with the older rooms retained as quieter spaces.

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

    Local figures for Sutton

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Domestic gardens share of land (GLUD 2005)34.5 % of land that is domestic garden (GLUD 2005)2005data.london.gov.uk
    Households living in a house62.9 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk
    Owner-occupied households64.4 % of households owner-occupied (owned outright or with mortgage/loan)Census 2021nomisweb.co.uk
    Green Belt share of the council area14 % of council area covered by green-belt polygons—planning.data.gov.uk
    Conservation areas8 named conservation areas published by the council—planning.data.gov.uk
    Listed building entries209 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Householder decisions601 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted91.8 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications decided in time94.8 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Larger home extension prior approvals granted9 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.gov.uk
    Larger home extension prior approvals refused35 decisions2025 Q2 to 2026 Q1 (1 Apr 2025 to 31 Mar 2026)assets.publishing.service.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 Sutton

    Householder applications by street in Sutton

    Streets in Sutton with the most householder applications, and the share approved
    StreetApplicationsApproved
    Higher Drive3570%
    Oaks Avenue3179%
    Banstead Road South3090%
    The Gallop2893%
    Ridge Road2680%
    Foresters Drive2391%
    Pine Ridge2385%
    Pine Walk2383%
    Boundary Road2276%
    Caldbeck Avenue2273%
    Cornwall Road2282%
    Carshalton Park Road2171%
    Kingsmead Avenue2190%
    Alington Grove2095%
    Chiltern Road2090%
    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

    Sutton's design guidance for extensions

    The council's Design of Residential Extensions SPD is the main document, supported by the Urban Design Guide SPD and the Sutton Local Plan 2016-2031, adopted in 2,018. We found no dimensioned rule for wraparounds in the guidance we reviewed, so Sutton treats an L-shaped extension through its general tests for side and rear additions: a subordinate design, a respect for the building line and no unacceptable loss of light or privacy.

    A side element is where those tests bite. Houses in a suburban street are usually set a little apart, and a side wing that closes the gap changes the street scene even when it is single storey. We show the front elevation with the side wall set back from the principal facade, and mark the distance to the boundary so that the gap is visible on the sheet.

    Sutton is also a place with Green Belt. 14 per cent of the borough's area is covered, and houses on or beside it follow stricter rules on how much an extension may add. We confirm the status of the site first.

    Heritage is light, so permitted development is realistic

    Sutton has 8 conservation areas and 209 listed entries, a small number for its size, so most addresses sit outside any designation. That makes permitted development a realistic route here, more than it is in Southwark or Richmond.

    The limits are: Side extension: single storey, max 4 m high, max half the width of the original house; and 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey. They are tested together, because Limits apply to the total enlargement (new part plus any existing enlargement it joins). We tot up the original house, previous extensions and the proposal on one sheet, and a lawful development certificate then gives written proof for a future sale.

    Going beyond the basic rear depth means prior approval, and Sutton's figures show how that goes: in the latest national statistics the council granted 9 and refused 35. A householder application is the likelier choice for a deep wraparound.

    Sutton householder decisions

    The council decided 601 householder applications in its latest published year, granted 91.8 per cent and decided 94.8 per cent within eight weeks or an agreed extension. Those cover every kind of home project, not wraparounds in particular, and they are no promise on a decision.

    They do tell us that the process is predictable, so a build programme can be planned with a sensible window for the decision. We put that window into the timeline we give clients at the start.

    Wraparound extension drawings in Sutton: what is included

    The set covers existing and proposed plans, sections and elevations, a location plan and a block plan, checked by a second chartered technologist. The fee is £1,195 including VAT, fixed in advance. If the council asks for changes before deciding, we redraw at no charge, and the council's fee is £548.

    Large windows are tempting on a garden elevation, but they are limited: 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. We show the total on the elevation sheet.

    Related drawings and neighbouring boroughs

    If you want proof of permitted development, see lawful development certificate drawings in Sutton. Single-element alternatives are rear extension drawings in Sutton and side return extension drawings in Sutton. The borough overview is architectural drawings in Sutton. Nearby, Merton and Croydon set their own limits.

    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 Sutton

    Wraparound extension drawings nearby

    Questions

    Can a Sutton house have a wraparound under permitted development?

    Often, because Sutton has few conservation areas. The side and rear parts count against one national total, so previous extensions matter. We add them up before drawing.

    Does Green Belt affect wraparound extensions in Sutton?

    On the addresses it covers, yes. Green Belt takes up 14 per cent of the borough and carries stricter limits on how much a house may be enlarged.

    How much do wraparound extension drawings cost in Sutton?

    From £1,195 including VAT, fixed before you commit. The council's fee is separate.

    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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