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Wandsworth, London

M&E drawings in Wandsworth

Wandsworth's Victorian terraces were built without a thought for extract fans, and every loft, basement or kitchen extension now has to add them. We draw M&E drawings for Wandsworth houses, lofts and basements so the ventilation, circuits and alarms are planned together and every trade prices the same layout. Fixed quote 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 m&e drawings

    Four 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. Building regulations

      Technical drawings are coordinated with the structural engineer's calculations, the drainage and the planning conditions.

    4. 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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    Pencil resting on a dimensioned technical drawing beside a scale rule

    What the Wandsworth Local Plan expects from services design

    Wandsworth adopted its current Local Plan in 2,023, and the sustainable design policy is the part that touches an M&E drawing. Paragraph E sets the energy duty: Energy assessment: all new residential. In plain terms, any new home needs an energy assessment that follows the London Plan hierarchy, and the validation list repeats it as item eleven.

    Paragraph H deals with heat. New development must keep overheating down through layout, materials and landscaping, and the council's reasoning cites London Plan SI4 cooling hierarchy. For a loft conversion under a dark roof that is not a technicality. We draw openable windows, vents and fan positions so the room can purge heat on a summer night.

    Water is in paragraph A: new homes must meet 110 l/p/d incl. 5 l external, secured by condition. The standard national figure is looser, so a Wandsworth home needs fittings chosen with care, and the M&E sheet lists them.

    None of this means a small refit needs a planning document. It means a services drawing for a Wandsworth house starts from the same questions the council asks of larger schemes: how is the home heated, how does it shed heat, how much water does it use and where does the rain go. Answering them on paper once is cheaper than answering them on site three times.

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

    Local figures for Wandsworth

    Figures with their unit, period and source
    MeasureValuePeriodSource
    LP10 para E: all new residential development and major non-residential development must submit an energy assessment following the London Plan energy hierarchy (validation item 11 repeats this; the Council's Sustainability Checklist is local guidance). Major schemes also need a Whole Life Cycle Assessment.Energy assessment: all new residential—wandsworth.gov.uk, Wandsworth Local Plan 2023-2038 (adopted 19 July 2023), LP10 para E, printed p.289 (PDF p.303); validation list p.12, item 11
    LP10 para H: new development must minimise overheating through layout, design, construction, materials and landscaping, following the London Plan cooling hierarchy (Policy SI4); para 15.24 onwards explains the hierarchy.London Plan SI4 cooling hierarchy—wandsworth.gov.uk, Wandsworth Local Plan 2023-2038 (adopted 19 July 2023), LP10 para H, printed p.290 (PDF p.304); para 15.24, printed p.293
    LP10 para A.7: new homes must incorporate water conservation measures to meet a maximum water efficiency standard of 110 litres per person per day (including 5 litres or less for external use), secured by planning condition.110 l/p/d incl. 5 l external—wandsworth.gov.uk, Wandsworth Local Plan 2023-2038 (adopted 19 July 2023), LP10 para A.7, printed p.289 (PDF p.303)
    LP12 para E: SuDS are required in all development; surface water discharge must reduce to greenfield run-off rates unless technically unfeasible, in which case at least 50% attenuation (objective 100%) of the existing site's peak run-off is required; surface water must not go to the foul sewer (para G).Greenfield rate, or at least 50% attenuation—wandsworth.gov.uk, Wandsworth Local Plan 2023-2038 (adopted 19 July 2023), LP12 paras E and G, printed p.313 (PDF p.315)
    Validation item 20: a Flood Risk Assessment is required for developments in flood zones 2, 3a and 3b, and in zone 1 for sites of 1 ha or more or land with critical drainage problems; it must show SuDS are incorporated unless clearly inappropriate.FZ2/3, or FZ1 1 ha+—wandsworth.gov.uk, Wandsworth Local Validation Checklist (July 2026), p.17, item 20
    Local plan adopted2,023—wandsworth.gov.uk
    Households living in a house31.4 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk
    Average price, semi-detached1,345,411 GBP2026-07publicdata.landregistry.gov.uk
    Conservation areas46 named conservation areas published by the council—planning.data.gov.uk
    Listed building entries312 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Registered parks and gardens9 registered parks and gardens intersecting the LPA boundary (Historic England)—planning.data.gov.uk
    Householder decisions977 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted91.9 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    AD F Vol 1 (2021), Table 1.1 intermittent extract, PDF p.16; 2026 edition Table 1.130 l/s—gov.uk
    AD F Vol 1 (2021), Table 1.1 intermittent extract, PDF p.16; 2026 edition Table 1.115 l/s—gov.uk
    AD F Vol 1 (2021), Table 1.1 intermittent extract, PDF p.16; 2026 edition Table 1.130 l/s—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 Wandsworth
    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

    Drainage, flood zones and basements

    The flood and drainage policy makes SuDS a requirement in all development, and its target is Greenfield rate, or at least 50% attenuation. Surface water must not be sent to the foul sewer. For a terrace with a rear addition, that means thinking about where the new roof drains before the roof is drawn.

    The council's validation list adds a flood risk assessment, and it describes who needs one as FZ2/3, or FZ1 1 ha+. Wandsworth runs along the Thames and the lower Wandle, so a basement or a lowered ground floor on a low street is worth checking against the flood maps before you commit.

    The council also publishes non-statutory guidance on basement extensions, and its Housing SPD covers rear extensions, roof extensions and loft conversions as well. Basements bring their own services: sump pumps, non-return valves, mechanical ventilation and a second means of drainage. We draw those on the same set so the structural engineer, the drainage designer and the electrician use one reference.

    Terraces, semis and the services inside them

    Only 31.4 per cent of households live in a house or bungalow here, and the average semi-detached home sold for £1,345,411 in the latest Land Registry month. At that value many owners plan a new kitchen, new bathrooms, a loft and often a rewire in one programme.

    A kitchen hood that vents outside needs 30 l/s, a bathroom 15 l/s and a utility room 30 l/s. In a mid-terrace the nearest outside wall may be at the back, so the duct from a front bathroom has to travel; we test the run in the model before the joists are cut.

    Wandsworth has 46 conservation areas, 312 listed building entries and 9 registered parks and gardens. Visible external plant is the most common reason a services design is sent back, so we position flues and terminals at the rear or in a side return wherever we can.

    Loft conversions deserve a separate word. A new stair, a bathroom and a heat source in the roof space all need routes down through rooms that already exist. We follow the route from the roof to the consumer unit and the stack, and we note where a boxed pipe or duct will show in a first-floor ceiling, so you can decide whether the compromise is acceptable.

    What the set contains and how it is used

    You receive a power and lighting plan per floor, a ventilation plan with each fan's duty, a consumer unit schematic, an alarm layout and a fittings schedule. The council decided 977 householder applications in its latest year and granted 91.9 per cent.

    The set goes beside our building regulations drawings in Wandsworth, and if you need the heating and hot water design, our MEP design service explains how that works. For more about the borough, read architectural drawings in Wandsworth.

    Your electrician certifies the installation, and our sheets give them everything needed to do it. Send us the plans and we will quote a fixed fee after a free constraints check.

    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.

    Other services in Wandsworth

    M&E drawings nearby

    Questions

    Does a Wandsworth loft conversion need an energy assessment?

    The Local Plan paragraph is aimed at new residential development. A loft conversion for an existing home usually sits outside it, but the overheating paragraph is a good guide to how we draw ventilation.

    What water limit applies to a new home in Wandsworth?

    The Local Plan sets a stricter per-person figure than the national default, secured by condition. Our M&E sheet lists the fittings so the calculation can be checked.

    Can you draw services for a Wandsworth basement?

    Yes: pumped drainage, ventilation, power and alarms are shown on the same set, with notes for your structural engineer and flood consultant.

    How is the work priced?

    Fixed quote after a free constraints check, based on floors and systems.

    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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