020 7864 7245Request a fixed quote

Kingston upon Thames, London

L-shaped dormer drawings in Kingston upon Thames

L-shaped dormer drawings in Kingston upon Thames suit suburban houses with a rear wing and a long garden behind. Domestic gardens cover 30.9% of the borough's land, so the roof is seen from many windows, and the council has 28 conservation areas to respect.

Fixed quote after a free constraints check

  • MCIAT chartered
  • £2m PI insured
  • LABC Partnered
  • Fixed fees, VAT included

Request a fixed quote

We use it to check conservation areas and constraints.
Pick the council that decides your application.
A few lines: what you want to build, and anything the council has already said.
Add photos or drawings

Drop files here or choose from your device

PDF, JPG, PNG, DWG · up to 10 files, 90 MB in total

    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 l-shaped dormer 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.

    Request a fixed quote
    Rear view of brick terraced houses in London with slate roofs and chimney stacks along the shared roofline

    Gardens, overlooking and the L-shaped dormer

    Kingston upon Thames is a garden borough by the numbers. The national land-use database puts domestic gardens at 30.9% of the land, and a long rear garden means the back of your roof is a visible feature from houses on all sides. An L-shaped dormer enlarges that visible roof, so we show it from the garden of every adjoining house.

    The geometry matters more than the label. A dormer that stops short of the party walls, keeps a margin from the eaves and carries a clean, flat face reads as part of the house. One that is stepped, bulky or too close to the boundary invites neighbours to object, and an objection is what turns a quick decision into a slow one.

    We draw the existing roof, the L in plan and section, and the rear elevation with the neighbours' windows marked. If the proportions are wrong, we show a smaller option next to the larger one.

    Slate-clad roof extension on a yellow-brick London terraced house

    Local figures for Kingston upon Thames

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Domestic gardens share of land (GLUD 2005)30.9 % of land that is domestic garden (GLUD 2005)2005data.london.gov.uk
    Conservation areas28 named conservation areas published by the council—planning.data.gov.uk
    Listed building entries163 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Article 4 directions3 Article 4 directions published by the council—planning.data.gov.uk
    Article 4 direction areas114 Article 4 direction area polygons published by the council—planning.data.gov.uk
    Tree preservation zones7,145 tree preservation zone polygons published by the council—planning.data.gov.uk
    Green Belt share of the council area17 % of council area covered by green-belt polygons—planning.data.gov.uk
    Householder decisions742 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted83 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications decided in time92.5 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.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 Kingston upon Thames
    Loft enlargement in section: the permitted development limitsExtra roof volume allowed: 40 m³ (terrace house) / 50 m³ (any other house) additional roof volume. Set-back from the eaves: Original eaves maintained; enlargement set at least 0.2 m from the eaves measured up the roof slope, so far as practicable (not required for hip-to-gable or roofs joining a rear/side extension). Height limit: No part higher than the highest part of the existing roofABC

    Loft enlargement in section: the permitted development limits

    A dormer on the rear slope, with the limits that decide whether it needs planning permission.

    A · Extra roof volume allowed
    40 m³ (terrace house) / 50 m³ (any other house) additional roof volume
    B · Set-back from the eaves
    Original eaves maintained; enlargement set at least 0.2 m from the eaves measured up the roof slope, so far as practicable (not required for hip-to-gable or roofs joining a rear/side extension)
    C · Height limit
    No part higher than the highest part of the existing roof

    The Kingston policy documents

    The borough's planning policy is led by the Core Strategy (with Kingston Town Centre Area Action Plan 2008), adopted in 2,012. Beneath it sits the Residential Design SPD, the document we read first when drawing a roof extension.

    Both documents are older than the newest London guides, so we do not copy the approach from other boroughs. We read what Kingston says now, cite the relevant paragraphs in the design and access note and let the drawings show the compliance. Where the old wording is silent on an L, we explain the design by analogy to the rules for a single dormer and say so openly, which gives the officer less to guess at.

    Heritage adds a second layer. The council has 28 conservation areas and Historic England lists 163 entries, a modest figure beside inner London boroughs. Inside a conservation area a roof enlargement is not permitted development, and we check the address before suggesting a route.

    Article 4 and tree zones

    Kingston records 3 Article 4 directions, but they cover 114 separate mapped areas, so one direction can reach many streets. We read each one that touches the property rather than assume it concerns only the area named.

    The council also maps 7,145 tree preservation zones. In a borough with this much garden, a protected tree near the rear wall can affect where the builder places scaffolding, and we note it on the drawings.

    Several layers overlay the same street: tree zones, Article 4 areas and conservation area boundaries. We print the overlay map for your address and attach it to the quote. Green Belt covers 17% of the council area. A dormer adds no footprint, so Green Belt usually matters less than the other checks, but houses near its boundary need it looked at.

    How the council decides householder work

    Kingston decided 742 householder applications in the latest year and granted 83%. 92.5% were decided within eight weeks or an agreed extension.

    Not every application meets the target, and the ones that run over are often those with objections, which is why we spend time on neighbour views and why we look at planning drawings in Kingston upon Thames as a complete package rather than a single sheet.

    The Mayor of London levy this year is 72.73 pounds per square metre of new floorspace. A roof conversion inside the existing envelope usually adds none, and we say so on the quote. If you also plan a rear extension, the two projects share one survey and one set of structural drawings, which is cheaper than commissioning them separately and avoids contradictions between the plans.

    Related drawings in Kingston upon Thames

    A straight rear dormer is cheaper than an L and may be enough, so compare dormer loft conversion drawings in Kingston upon Thames before you decide. The general loft conversion drawings in Kingston upon Thames page sets out the stair and fire rules. For the borough as a whole, see architectural drawings in Kingston upon Thames, or compare L-shaped dormer drawings in Merton.

    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.
    Converted loft bedroom with roof windows and a Juliet balcony
    Storey by storey
    Move up and down — the car travels between floors.

    Other services in Kingston upon Thames

    L-shaped dormer drawings nearby

    Questions

    Do I need planning permission for an L-shaped dormer in Kingston upon Thames?

    It depends on the address. The borough has 28 conservation areas and 3 Article 4 directions, and inside either a dormer may need an application.

    How often does Kingston grant householder applications?

    The council granted 83% of its householder decisions in the latest year. That describes the borough rather than your house.

    Why do neighbours matter so much for a Kingston dormer?

    Large gardens mean a roof is visible from many windows, and domestic gardens cover 30.9% of the borough's land. We show the dormer from adjoining gardens in the drawings.

    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.

    Request a fixed quoteCall 020 7864 7245WhatsApp