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Waltham Forest, London

Daylight and sunlight report in Waltham Forest

Waltham Forest asks for a daylight and sunlight assessment on every major application, on proposals that may harm light to neighbours' homes and gardens, and on new homes in a restricted setting. It also wants a shadow study through the day and year and a short non-technical summary. We prepare all of it, quoted as a fixed fee after a free constraints check.

Fixed quote after a free constraints check

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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 daylight and sunlight reports

    Seven 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.

    Free redraws until approval. Every drawing set is checked independently, and the checker is never the person who drew it.

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    Rows of brick terraced houses and gardens on a residential street

    What Waltham Forest's validation list asks for

    The council's local validation checklist sets out the trigger as All Major; or potential adverse impact. The assessment must follow the current BRE guide, include an overshadowing study with shadow diagrams through the day and year, and come with a non-technical summary.

    The third trigger is the least common: new homes in a restricted setting. A house built in the end of a garden, a mews infill or a flat created in a basement counts, because the new rooms have to be shown to receive acceptable light. That sets Waltham Forest apart from boroughs that test only the effect on neighbours.

    The non-technical summary is worth taking seriously. Neighbours and ward councillors read it, and a summary that a layperson can follow often decides whether an objection rests on a misunderstanding. We write it as a short page with plain language and a few images from the model.

    Georgian brick terrace with sash windows, arched fanlight doorways, stone steps and iron railings in London

    Local figures for Waltham Forest

    Figures with their unit, period and source
    MeasureValuePeriodSource
    A Daylight/Sunlight assessment is required for all Major applications and for proposals that may adversely affect daylight or sunlight to adjoining properties (including gardens or amenity space) or create new homes in a restricted setting. It must follow the current BRE guide 'Site layout planning for daylight and sunlight', include an overshadowing study (shadow diagrams through the day and year) and a non-technical summary.All Major; or potential adverse impact—walthamforest.gov.uk, Waltham Forest Local Validation Checklist 2025 (national and local, key changes highlighted), p.19, item 21
    Households living in a house55.1 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk
    Owner-occupied households48.9 % of households owner-occupied (owned outright or with mortgage/loan)Census 2021nomisweb.co.uk
    Conservation areas15 named conservation areas published by the council—planning.data.gov.uk
    Article 4 directions15 Article 4 directions published by the council—planning.data.gov.uk
    Listed building entries118 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Tree preservation orders231 tree preservation orders published by the council—planning.data.gov.uk
    Householder decisions771 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted81.5 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Minor applications granted76.6 %1 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 Waltham Forest
    Which application your project needsLawful Development Certificate decision: 8 weeks. Prior approval decision: 42 days. Householder decision: 8 weeksYour projectWithin permitted development?Lawful Development CertificatePrior approvalHouseholder applicationYesLarger rear extensionNoABC

    Which application your project needs

    The usual route for a house; flats and listed buildings follow other rules.

    A · Lawful Development Certificate decision
    8 weeks
    B · Prior approval decision
    42 days
    C · Householder decision
    8 weeks

    Terraces, garden suburbs and the shadow study

    Waltham Forest is mixed: 55.1 per cent of households live in a house or bungalow, and 48.9 per cent own their home. Narrow terraces and wider suburban plots both occur, and the light problem differs between them.

    On a narrow terrace the shadow study through the year is the heart of the case. A rear extension on the south side throws a long winter shadow over the neighbour's patio, but in summer the same wall casts little. A single snapshot can mislead in either direction, which is why the council asks for the day and year.

    The council's Residential Alterations and Retrofit SPD sets out the extension forms it supports. We test the permitted shape against actual windows and report where it still takes light.

    Heritage, trees and Article 4

    The borough has 15 conservation areas and 15 Article 4 directions, the latter covering 807 mapped areas. Historic England lists 118 entries. Inside an Article 4 area, work that would normally be permitted development needs a planning application, and the validation list then applies.

    Trees matter here too, since the council has made 231 tree preservation orders. A protected tree on the boundary both shades the garden and limits where an extension can go. Our survey records trees so the model shows where they stand.

    What the council's record shows

    The council decided 771 householder applications in the latest published year and granted 81.5 per cent, with 90.7 per cent decided on time. Minor schemes were granted at 76.6 per cent across 525 decisions.

    The on-time figure leaves room for delay, so a complete application matters. Where the scheme goes beyond a house extension, our planning consultant service in Waltham Forest can carry the wider case, and our planning drawings in Waltham Forest share the model.

    How we prepare the assessment

    We survey the house, photograph the neighbouring elevations and build a three-dimensional model of the street. The tests are vertical sky component and daylight distribution at the affected windows, annual sunlight hours where orientation requires, and the overshadowing study through the day and year for gardens and amenity space. For new homes, the light in each habitable room is added.

    The written report names every window and explains each result in plain English. The BRE guide is advisory and London policy asks for flexibility, so where a shortfall is modest we say why it may be reasonable. A second chartered technologist checks the geometry before the report is issued.

    If a window fails, we try the practical remedies on the model, such as a lower eaves or a shallower depth, and show you the effect.

    Cost and next step

    The fee is fixed after a free constraints check and depends on the windows to be tested, whether new homes are involved and the site. Send an address and a sketch.

    Read the daylight and sunlight overview for the method and the architectural drawings page for Waltham Forest for the rest of our work. Next door, the rules differ: see Redbridge and Newham.

    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
    The street around you
    Move across the plinth — the blocks rise around the pointer.

    Other services in Waltham Forest

    Daylight and sunlight reports nearby

    Questions

    What does Waltham Forest ask for in the assessment?

    Use of the current BRE guide, an overshadowing study with shadow diagrams through the day and year, and a non-technical summary.

    Does a new home in a garden need the report?

    Yes. The checklist covers new homes in a restricted setting, so the light inside each new habitable room is tested.

    Why a shadow study through the year?

    Shade changes with the season. A winter shadow can be long and a summer one short, so one date can mislead.

    Will I get a plain-English version?

    Yes. We write the non-technical summary the council asks for as a short page with images from the model.

    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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