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Hammersmith & Fulham, London

Wraparound extension drawings in Hammersmith and Fulham

Wraparound extension drawings in Hammersmith and Fulham meet a generous grant rate and a slow clock: 97.8% of householder applications were granted, yet only 79.8% were decided on time. Our MCIAT chartered architectural technologists draw them from £1,195 including VAT, with the timing built into your plan.

From £1,195 (VAT included)

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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 wraparound extension 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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    House extension under construction with scaffolding, new glazed doors and building materials

    Reading the Hammersmith and Fulham decision record

    Our data holds no borough supplementary document on house extensions for Hammersmith and Fulham, so we draw to the local plan and the street's own pattern, using neighbouring approvals found on the council's online planning search as precedent.

    Over the latest twelve months the council made 506 householder decisions and granted 97.8%. That rate describes past schemes, not yours, so it is no reason to submit a loose one.

    The speed figure tells a different story. Just 79.8% were decided within eight weeks or an agreed extension. Plan for a longer wait than the statutory period suggests, and book builders after the decision, not before. The quarterly returns to government for the year to March show a better on-time share of 90.5%, but the two figures come from different sources, so plan around the lower one.

    Brick house being extended, with a wide new opening supported over the ground floor

    Local figures for Hammersmith & Fulham

    Figures with their unit, period and source
    MeasureValuePeriodSource
    Conservation areas47 named conservation areas published by the council—planning.data.gov.uk
    Listed building entries268 list entries (Historic England, within the LPA boundary)—planning.data.gov.uk
    Householder decisions506 decisions1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications granted97.8 %1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Householder applications decided in time79.8 % decided within 8 weeks or an agreed extended period1 July 2025 - 30 June 2026assets.publishing.service.gov.uk
    Households living in a house24.6 % of households living in a house or bungalow (detached, semi-detached or terraced)Census 2021nomisweb.co.uk
    Average house price738,048 GBP2026-07publicdata.landregistry.gov.uk
    Mayoral CIL rate (indexed)96.97 £/m² (indexed, permissions granted in 2026)—london.gov.uk
    Domestic gardens share of land (GLUD 2005)17.1 % of land that is domestic garden (GLUD 2005)2005data.london.gov.uk
    Householder: alterations/extensions to a single dwellinghouse, from 1 Apr 2026548 GBP—ribblevalley.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 Hammersmith & Fulham

    Householder applications by street in Hammersmith & Fulham

    Streets in Hammersmith & Fulham with the most householder applications, and the share approved
    StreetApplicationsApproved
    Carthew Road2396%
    Rylett Crescent2296%
    Emlyn Road21100%
    Orbain Road19100%
    Quarrendon Street19100%
    Rannoch Road1994%
    St Maur Road1994%
    St Dionis Road18100%
    Gowan Avenue1781%
    Walham Grove1777%
    Banim Street16100%
    Doneraile Street16100%
    Felden Street1693%
    Mendora Road1692%
    Ravenscourt Road16100%
    Counts of householder applications by street; no individual applications are shown. Streets with fewer than five applications are left out.Source: GLA Planning London Datahub, householder applications, all years held. Contains public sector information licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2026.
    Single-storey rear extension: the permitted development limitsDepth beyond the original rear wall: 3 m (attached) / 4 m (detached) beyond the original rear wall, single storey. Maximum height: 4 m. Within the zone near the boundary: Eaves no higher than 3 m where within 2 m of the curtilage boundary. Larger extension under prior approval: 6 m (attached) / 8 m (detached), single storey, height max 4 m; not on article 2(3) land or an SSSIABCD

    Single-storey rear extension: the permitted development limits

    The house in section with a rear extension; the dashed lines mark the zone near the boundary.

    A · Depth beyond the original rear wall
    3 m (attached) / 4 m (detached) beyond the original rear wall, single storey
    B · Maximum height
    4 m
    C · Within the zone near the boundary
    Eaves no higher than 3 m where within 2 m of the curtilage boundary
    D · Larger extension under prior approval
    6 m (attached) / 8 m (detached), single storey, height max 4 m; not on article 2(3) land or an SSSI

    Heritage and housing stock

    The borough has 47 conservation areas and 268 list entries, a dense mix for a small area. A wraparound includes a side element, so inside a conservation area it cannot use the national permitted development rights and needs a planning application.

    Only 24.6% of households live in a house, and just 32.1% own their home. So the houses that suit a wraparound are scarce and valuable: the average home sells for £738,048. With so little of each plot to spare, we pay extra attention to the garden that remains once the extension is in. The Generalised Land Use Database puts domestic gardens at 17.1% of the borough.

    From survey to submission

    We measure the house, draw the existing plans, and test the wraparound as a whole before suggesting a route. For rear-only versions see our rear extension drawings in Hammersmith and Fulham, which often make a useful comparison on a narrow plot.

    If the design stays inside the permitted limits, a Lawful Development Certificate confirms it in writing; the borough handled 94 of them in its latest return year. Deeper rear-only schemes can also go through the larger home extension prior approval route: the council granted 3 and refused 1 in that year. A wraparound with a side element usually does not fit that route.

    Design choices for a Hammersmith and Fulham plot

    Plots here are often tight, with a side return that is little wider than a path. The question for a wraparound is therefore less about maximum floor area and more about what the remaining garden and the retained rooms receive. We test daylight to the old rear rooms, because a deep infill can turn a dining room behind it into a dark one.

    Materials matter in a heritage-dense borough. Stock brick that matches the host house, slim framed glazing and a roof that does not rise above the neighbour's boundary line all help the case. A parapet with a flat roof is common on terraces, and a sloping roof falling away from the neighbour can reduce the visual impact on their garden.

    Below ground there is a practical point. Shared drains often cross the side return, and building over them needs the water company's agreement before work starts. We mark the manholes on the survey and set the layout around them, so the builder does not meet the sewer for the first time with a digger.

    The set of drawings we issue records all of this in plan, elevation and section, so a planning officer, a building control surveyor and your builder read the same design.

    Cost, levy and neighbours

    The council's householder fee is £548. Mayoral CIL here sits in band 1, at £96.97 per square metre indexed for this year, though the levy generally bites only on larger additions, so most single-storey wraparounds will not owe it. We confirm that when we measure.

    Side and rear boundaries often call for notices under the Party Wall etc. Act, which our party wall notices service prepares. For everything else we do locally, see architectural drawings in Hammersmith and Fulham.

    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.
    Finished white-rendered rear house extension with large glazed doors
    Every side considered
    Flick across the turntable to spin it.

    Other services in Hammersmith & Fulham

    Wraparound extension drawings nearby

    Questions

    Why is the Hammersmith and Fulham grant rate so high?

    97.8% of 506 householder decisions were granted. The rate describes past schemes, so we still shape each one around the council's likely concerns before it goes in.

    How long will the council take?

    Only 79.8% were decided within eight weeks or an agreed extension, so allow more time than the statutory period.

    Do I need planning permission in a conservation area?

    Yes for a wraparound. The borough has 47 conservation areas and the national rules bar side extensions there.

    What is in a drawing set for this borough?

    Existing and proposed plans, elevations and sections, a location plan and a block plan, with a short design statement on height, daylight and materials. We can also submit the application for you and answer the case officer's questions as they arise.

    What do the drawings cost?

    From £1,195 including VAT, fixed up front. The council fee of £548 is paid separately.

    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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