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Sutton, London

Garden room drawings in Sutton

Garden room drawings in Sutton start at £495 including VAT. Sutton is a garden-rich borough, with 34.5 per cent of the borough in domestic garden and 64.4 per cent of households owning their home, so a studio or office at the bottom of the garden is a common project.

From £495 (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 garden room 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

    How Sutton judges a garden room

    Sutton's Design of Residential Extensions SPD is the document an officer turns to for domestic outbuildings that need permission, alongside the Urban Design Guide SPD. We have not found a measured size limit in either, so the national limits form the envelope and the guidance supplies the test: a building that looks subordinate and keeps a reasonable garden around it.

    With big plots the risk is not a lack of space but a room that grows. A very large outbuilding invites questions about use, and one that starts to look like a second house is treated as one. We recommend sizing the room to its purpose, and we draw the use on the plans so the officer reads an office, studio or gym.

    The local plan is the Sutton Local Plan 2016-2031, which provides the policy framework for any application beyond permitted development.

    We also check for rear access. In some Sutton roads a service lane or a neighbour's side passage runs behind the garden, and that affects how materials arrive and how the room is seen from outside the plot.

    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
    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
    Households living in a house62.9 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk
    Householder applications granted91.8 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Average price, detached1,038,684 GBP2026-07publicdata.landregistry.gov.uk
    GPDO Sch 2 Pt 1 Class E, para E.1(e)Max 2.5 m if within 2 m of a boundary; otherwise 4 m dual-pitched roof or 3 m any other roof—legislation.gov.uk
    Class E, para E.1(b)Buildings may not cover more than 50% of the curtilage (excluding the original house)—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 Sutton
    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

    Green Belt, conservation areas and heritage in Sutton

    About 14 per cent of the borough is mapped as Green Belt, and a garden room there is tested for openness. A low room set close to the house is read more kindly than a tall one at the far fence, even where the order would let you build it.

    Heritage is a lighter constraint here, with only 8 conservation areas and 209 listed building entries, plus 2 registered parks and gardens. Where one applies, the rules are firm: On article 2(3) land, no outbuilding between a side wall and the boundary, and Garden buildings within the curtilage of a listed building are not permitted development.

    Because so few addresses are affected, the common Sutton case is a plain permitted development garden room, and the main task is to prove it.

    Garden room permitted development in Sutton

    Houses make up 62.9 per cent of households, and the gardens are deep, so most plots meet the cover rule easily: Buildings may not cover more than 50% of the curtilage (excluding the original house). The height test is the one to design around: Max 2.5 m if within 2 m of a boundary; otherwise 4 m dual-pitched roof or 3 m any other roof.

    A lawful development certificate in Sutton is the document that proves it, and it is worth having where a sale or remortgage is likely. Where the design goes beyond the order, a householder application follows, and Sutton granted 91.8 per cent of 601 decisions, deciding 94.8 per cent in time. Our planning drawings in Sutton set carries it.

    Average prices run from £464,085 for terraced homes to £1,038,684 for detached ones, so the garden is a real part of the value.

    Deep gardens bring their own detail. A room at the far end needs a service route for power and, sometimes, drainage, and the drawings show the trench line, any change of level and the path to the door, so the builder prices the whole run and not only the box.

    Building Regulations, price and next step

    A small detached office is usually exempt: Detached single-storey building up to 30 m², no sleeping accommodation, at least 1 m from the boundary or substantially non-combustible, is exempt. If a room is to be slept in, our building regulations drawings in Sutton cover the technical detail.

    The fixed fee is £495, VAT included. The set holds a site plan, floor plan, elevations, a section and a 3D view of the room in your garden; any council fee is separate.

    More on the borough is on the architectural drawings in Sutton page, and the national rules are on the garden room drawings page. We redraw free until approval if the council asks for changes, and we make no promise on the outcome.

    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

    Garden room drawings nearby

    Questions

    Does a garden room in Sutton need planning permission?

    Usually not, if it keeps within the national height, eaves and cover limits and is used only for the house. Heritage and Green Belt layers can change that.

    Is Sutton's Green Belt a problem for a garden room?

    Not always, but openness is tested harder there, so a low room near the house is the safer design. We check the map for your address.

    How big can a garden room be in a large Sutton garden?

    The national order limits height and total cover, not floor area as such. Size the room to its use, since an oversized one invites questions.

    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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