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Lewisham, London

Building regulations drawings in Lewisham

Building regulations drawings in Lewisham start at £845 including VAT and cover the structure, insulation, fire safety and drainage that building control checks. The borough's planning guidance was rewritten recently, so we draw the technical set to match the current documents.

From £845 (VAT included)

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    Lewisham's current plan and the guidance behind your drawings

    Lewisham's development plan is the Lewisham Local Plan 2020-2040, adopted in 2,025. For a householder the working document is the Alterations and Extensions SPD, and for a house on a modest plot the Small Sites SPD may also be relevant.

    A recently adopted plan is useful to a client because the rules are settled and the older guidance cited by neighbours and builders may no longer apply. When we draw the technical set we check which document a planning officer will be reading, then keep the form, roof line and materials on our sheets consistent with it.

    Building regulations drawings are not judged on those documents. They are judged against the Approved Documents, and the two meet at the details: a flat roof needs enough build-up to be insulated and drained, yet planning may care about its thickness at the eaves. We resolve that on paper so the builder does not resolve it on site.

    If your project adds homes on a small plot, say so at the first call. Lewisham publishes the Small Sites SPD for that kind of scheme, and it can change which drawings are needed and who else must be involved.

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

    Local figures for Lewisham

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Local planLewisham Local Plan 2020-2040—lewisham.gov.uk
    Local plan adopted2,025—lewisham.gov.uk
    Supplementary planning documentAlterations and Extensions SPD2019lewisham.gov.uk
    Supplementary planning documentSmall Sites SPD2021lewisham.gov.uk
    Article 4 directions57 Article 4 directions published by the council—planning.data.gov.uk
    Article 4 direction areas89 Article 4 direction area polygons published by the council—planning.data.gov.uk
    Conservation areas30 named conservation areas published by the council—planning.data.gov.uk
    Listed building entries367 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Households living in a house42.2 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk
    Householder applications granted89.4 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications decided in time95.2 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Building Regulations 2010 reg 14A(6)Building control body must decide a full plans application within 5 weeks, or longer if agreed in writing—legislation.gov.uk
    Approved Document L Vol 1 2026, p.2AD L 2026 (Home Energy Model) takes effect 24 Mar 2027 for non-higher-risk work—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 Lewisham
    Building regulations, layer by layerPart A: structure: Approved Document A: Structure, 2004 edition incorporating 2004, 2010 and 2013 amendments. Part B: fire safety: All dwellings: fire detection and alarm system minimum Grade D2 Category LD3 (BS 5839-6), mains-operated smoke alarms to BS EN 14604. Part L: insulation: New elements in existing dwellings, limiting U-values W/(m²·K): roof 0.15, wall 0.18, floor 0.18, windows 1.4 (or WER Band B), doors 1.4. Part K: stairs: 2.0 m clear headroom over stairs. Full plans application: Building control body must decide a full plans application within 5 weeks, or longer if agreed in writingPart A: structurePart B: fire safetyPart L: insulationPart K: stairsFull plans applicationABCDE

    Building regulations, layer by layer

    The Approved Documents that shape most house projects, from structure to the application itself.

    A · Part A: structure
    Approved Document A: Structure, 2004 edition incorporating 2004, 2010 and 2013 amendments
    B · Part B: fire safety
    All dwellings: fire detection and alarm system minimum Grade D2 Category LD3 (BS 5839-6), mains-operated smoke alarms to BS EN 14604
    C · Part L: insulation
    New elements in existing dwellings, limiting U-values W/(m²·K): roof 0.15, wall 0.18, floor 0.18, windows 1.4 (or WER Band B), doors 1.4
    D · Part K: stairs
    2.0 m clear headroom over stairs
    E · Full plans application
    Building control body must decide a full plans application within 5 weeks, or longer if agreed in writing

    Article 4 directions and heritage in Lewisham

    Lewisham has 57 Article 4 directions across 89 mapped areas, and also 30 conservation areas.

    Article 4 directions are planning rules, not building regulations. The practical result is that a Lewisham street can need a planning application for work that would be permitted a few streets away, and the technical drawings then have to match the approved design, not a looser one.

    The borough boundary also meets 1 World Heritage Site, and Historic England records 367 list entries. We check the address against all of these before pricing, so the set you receive is for the route that actually applies. A technical drawing cannot rescue a design that planning has not accepted, and a planning approval cannot excuse a detail that fails the Approved Documents. Both approvals are needed, and we line them up before the builder is booked.

    Choosing the building control route in Lewisham

    With full plans, building control must decide within a set period. Building control body must decide a full plans application within 5 weeks, or longer if agreed in writing. A building notice skips that step and moves the checking onto site.

    Roughly 42.2 per cent of Lewisham households live in a house or bungalow and most of the rest in flats. Alterations to terraced houses often involve a party wall, a chimney breast or a shared drain, which is why we favour full plans for them.

    The notice rules are short but easy to miss. Give notice of intention to start; work may start 2 days after the notice. After that, the rule is: Notify commencement within 5 days after work is regarded as commenced.

    Planning decisions in Lewisham, and how they affect your timetable

    Lewisham decided 578 householder applications in its latest published year and granted 89.4 per cent. 95.2 per cent were decided on time.

    Those numbers cover all householder projects and tell you nothing about one house. What they do suggest is that the council's planning team keeps to its timetable, so the technical drawings should be ready by the time consent arrives. We start them once the design is settled, not after the decision.

    What the Lewisham set includes

    Expect foundation and floor plans, sections, wall, floor and roof build-ups, a drainage layout and a materials specification, drawn from the same model as the planning drawings. A second chartered technologist checks each sheet, and building control queries are answered with revised sheets at no extra fee.

    Energy rules are changing. AD L 2026 (Home Energy Model) takes effect 24 Mar 2027 for non-higher-risk work, so we state which edition the set is designed to, depending on when you submit.

    We ask for the planning decision or certificate, any survey you already hold and details of the existing drains.

    Before you start building, read about planning drawings in Lewisham and about structural calculations in Lewisham, because the engineer's figures feed straight into our sheets.

    Nearby boroughs and related services

    A property across the boundary follows another council's guidance. See building regulations drawings in Greenwich, in Bromley or in Southwark for those. If you are unsure whether the work needs planning at all, a lawful development certificate in Lewisham settles that, and the architectural drawings in Lewisham page covers the borough as a whole.

    What you receive

    Building regulations section drawing showing the construction build-up
    Sample drawing. Building regulations section showing construction build-up for a building control check.
    House extension under construction with scaffolding, new glazed doors and building materials
    Every layer specified
    Move across to open the layers; move down to pick one.

    Questions

    Does Lewisham's Article 4 direction affect building regulations drawings?

    Not directly, because Article 4 directions are planning rules. They can mean you need planning permission first, and the technical set must then follow the approved design.

    Which Lewisham planning documents apply to a house extension?

    The Lewisham Local Plan 2020-2040 and the Alterations and Extensions SPD are the main ones. We check which apply to your address before drawing.

    What do building regulations drawings cost in Lewisham?

    From £845 including VAT, fixed up front, with building control charges separate.

    Which energy rules will my Lewisham drawings follow?

    AD L 2026 (Home Energy Model) takes effect 24 Mar 2027 for non-higher-risk work. We design to the edition that governs your submission date.

    Sources and dates

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    Tell us about your property.

    We check the constraints, then send a fixed fee. Messages before 3pm get a reply the same working day.