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Greenwich, London

Dormer loft conversion drawings in Greenwich

Dormer loft conversion drawings for a Greenwich house cost £695 including VAT, and the first job is to learn what kind of land the house stands on. The borough holds 23 conservation areas, 540 listed entries and 1 World Heritage Site, so a roof that is a routine job in one street can be a heritage question in the next.

From £695 (VAT included)

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

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We use it to check conservation areas and constraints.
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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 dormer loft conversion 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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    Slate-clad roof extension on a yellow-brick London terraced house

    No dormer table in Greenwich, so heritage sets the tone

    Greenwich has an adopted plan, the Royal Greenwich Local Plan: Core Strategy with Detailed Policies, dated 2,014, but we found no published table of dormer clearances in it, and we do not invent one. What the borough does publish, through the planning data service, is where its heritage sits, and that map governs the roof far more than any ruler.

    Historic England lists 28 entries at Grade I, 45 at Grade II* and 466 at Grade II within the boundary. A house on one of those entries, or next to one, draws a closer look at the roofscape, and a dormer that would pass unnoticed elsewhere may be asked to step back or change its cladding.

    In practice we start with the question an officer would ask: can the new box be seen from the street or from a neighbouring protected building, and if so what does it do to the roofline? The answer decides whether we propose a rear dormer, a smaller flat-roofed box or a rooflight scheme.

    Converted loft bedroom with roof windows and a Juliet balcony

    Local figures for Greenwich

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Conservation areas23 named conservation areas published by the council—planning.data.gov.uk
    Listed building entries540 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Grade I listed entries28 list entries—planning.data.gov.uk
    worldHeritageSites1 World Heritage Sites intersecting the LPA boundary—planning.data.gov.uk
    Households living in a house48.4 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk
    Average price, terraced545,565 GBP2026-07publicdata.landregistry.gov.uk
    Householder decisions624 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted77.1 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications decided in time94.2 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Approved Document K 2013, para 1.13, Diagram 1.4Loft conversions where 2.0 m cannot be achieved: 1.9 m at the centre of the stair, 1.8 m at the side (half width)—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 Greenwich
    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

    Conservation areas and the permitted development line in Greenwich

    23 conservation areas cover many of the borough's older streets. The national position is plain: Class B roof enlargements are not permitted development on article 2(3) land. A dormer there goes to the council as a planning application, drawn in enough detail for a heritage officer to read.

    Outside those areas many Greenwich houses keep their rights, and a modest rear dormer can stay within the national volume limit. The check has two parts: has the roof already been extended, and does an Article 4 direction apply? A previous loft conversion by an earlier owner counts against the allowance, so we ask for the old paperwork or measure the roof ourselves.

    What the Greenwich housing market asks of a loft

    Only 48.4 per cent of the borough's 114,052 households live in a house or bungalow, and 41.1 per cent own their home. A dormer is a house project, so the first question for many Greenwich owners is whether the building is a house at all or a converted flat.

    Land Registry figures give an average terraced sale price of £545,565 and a semi-detached average of £712,724. The average price across all property types moved by -1.4 per cent over twelve months, a useful figure when you weigh a loft against a move.

    Domestic gardens make up 23.2 per cent of the land in the borough. The back garden is usually where the dormer is built from, so access for scaffold and a delivery of steel is part of what we plan.

    How Greenwich decides householder applications

    The council decided 624 householder applications in its latest year, granted 77.1 per cent and decided 94.2 per cent on time. A real share of householder cases does not end in a grant, which is a reason to draw the dormer cleanly rather than test the limits of the roof.

    These numbers cover every home project in the borough, from porches to extensions, so they say little about one dormer. We use them for timing: with decisions arriving on time, you can book a builder to follow the decision date with reasonable confidence, and we will say plainly if your address makes a pre-application conversation sensible.

    Your Greenwich dormer drawings, price and next steps

    The set shows existing and proposed floor plans, the stair, a dormer section with the roof build-up dimensioned, the elevations and the location and block plans. The stair gets particular attention: under the building regulations the loft stair is allowed reduced headroom, and we show the measured figure, Loft conversions where 2.0 m cannot be achieved: 1.9 m at the centre of the stair, 1.8 m at the side (half width), on the section so the engineer and builder start from the same number.

    The fee is £695 including VAT, fixed in advance, with an independent check by a second MCIAT chartered architectural technologist. If Greenwich asks for changes, we redraw at no charge.

    A related option is loft conversion drawings in Greenwich, which covers the wider choice of roof forms. For the borough as a whole, see architectural drawings in Greenwich. Neighbouring councils apply their own tests, for example Lewisham and Bexley.

    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.
    Brick cottage with a tiled roof, chimneys and a front dormer window
    Storey by storey
    Move up and down — the car travels between floors.

    Other services in Greenwich

    Dormer loft conversion drawings nearby

    Questions

    Do I need planning permission for a dormer in Greenwich?

    Often not, if the house keeps its permitted development rights and the dormer stays within the national limits. In a conservation area, or where an Article 4 direction applies, you do. We check the address first.

    Does Greenwich publish dormer size limits?

    We found none in the adopted plan or in guidance we could verify, so we quote none. The design is judged on its effect on the street and on heritage.

    Is a dormer allowed near the World Heritage Site in Greenwich?

    It depends on the plot and how visible the roof is. The borough contains 1 World Heritage Site, and a roof near it gets closer scrutiny, so we map the address before we draw.

    How much are dormer loft conversion drawings in Greenwich?

    From £695 including VAT, fixed before you commit. Council fees are 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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