House Extensions · W6 Hammersmith
Hammersmith & Fulham controls several W6 conservation areas; the Brackenbury Village grid and riverside terraces have strong character protection.
The borough-level guide to house extensions in Hammersmith and Fulham sets out how the same work is handled across the rest of the authority.
House extensions in Hammersmith are dominated by single-storey rear and side-return additions on W6's victorian and georgian terraces, riverside houses and, with double-storey and wrap-around schemes where the plot allows. Hammersmith & Fulham Council weighs depth, height and neighbour daylight; many extensions across Hammersmith, Brackenbury Village, Ravenscourt Park, Hammersmith riverside are Permitted Development, which we confirm with a Lawful Development Certificate before you build.
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical phase, ideal for victorian and georgian terraces, riverside houses and typical of Hammersmith.
Across Hammersmith, Brackenbury Village, Ravenscourt Park, Hammersmith riverside in W6, the dominant property is victorian and georgian terraces, riverside houses and mansion blocks across hammersmith and the brackenbury village streets. That stock shapes what house extension drawings looks like here: the right approach for a period terrace differs from a mansion-block flat or a new-build, and Hammersmith & Fulham Council judges each on design quality and neighbour impact. We survey the specific Hammersmith property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the W6 streetscape.
Housing stock in W6: Victorian and Georgian terraces, riverside houses and mansion blocks across Hammersmith and the Brackenbury Village streets.
Within the district: Hammersmith, Brackenbury Village, Ravenscourt Park, Hammersmith riverside.
Streets we know in W6: the Brackenbury Village grid, Hamlet Gardens, Ravenscourt Road and the Upper Mall riverside terraces. Each road has its own building line, boundary treatment and precedent that Hammersmith & Fulham Council weighs when assessing a house extension drawings scheme.
Conservation areas: Brackenbury, Ravenscourt, Hammersmith Mall, St Peter's Square. Inside these, most external work needs full planning and a Heritage Statement.
Getting around W6: Hammersmith on the District, Piccadilly, Circle and Hammersmith & City lines.
Regeneration: Hammersmith falls within or beside the Hammersmith town centre and riverside, which shapes local planning policy and design expectations.
Property values: around £600,000 for a flat and £1.2m-£1.8m for a house — a useful gauge of the build value an extension or loft adds in W6.
Borough character: Suburban-feel residential streets with strong conservation area coverage; well-established mansard precedents on many terraces.
Measured existing survey, photographic record, Article 4 and conservation check specific to Hammersmith before we quote.
2–3 design options at concept stage — alternative layouts, glazing, roof forms.
Site location plan, existing and proposed plans, elevations, sections, D&AS where required.
Part L thermal, Part B fire, Part M accessibility, structural strategy.
Steel beam, foundation, lintel design. Chartered engineer sign-off.
Party Wall notices where needed; Thames Water Build Over Agreement where within 3m of a public sewer.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Yes. The Victorian terraces in the Brackenbury grid suit side-return and rear kitchen extensions and loft conversions, but most of the grid is a conservation area, so full planning with a Heritage Statement is typically required rather than Permitted Development. We design to match the original brick and detailing and submit to Hammersmith & Fulham.
Yes. The Upper Mall and St Peter's Square houses are in conservation areas, several are listed, and the riverside sits in the Thames flood zone, so changes need full planning, often Listed Building Consent, and a flood-risk assessment. We provide the heritage and survey drawings these specialist projects require.
Usually yes, but inside the Ravenscourt conservation area a rear dormer needs full planning and front roof changes are resisted. We design the dormer to sit discreetly within the roofscape and detail it to match, submitting to Hammersmith & Fulham. Outside the conservation area, Permitted Development may apply.
Allow roughly 3-4 weeks for the drawings and around 8 weeks for the council's householder determination once submitted. On the Brackenbury and riverside conservation roads, consultation can add time, which we flag up front and carry through every officer query.
With Hammersmith property at around £600,000 for a flat and £1.2m-£1.8m for a house, the professional drawing fee is a small fraction of the value the work adds to W6's victorian and georgian terraces, riverside houses and. Hammersmith & Fulham Council charges its own statutory application fee on top (currently £548 for a householder planning application, £610 for a full application). We quote the drawings as one fixed price and the free site survey covers every W6 address.
For a W6 project across Hammersmith, Brackenbury Village, Ravenscourt Park, Hammersmith riverside, expect roughly 3–4 weeks from instruction to submission: week 1 the measured survey, weeks 2–3 the drawings and your revisions, then validation and the statutory determination by Hammersmith & Fulham Council (8 weeks for a householder application). We carry the Hammersmith application through every officer query to the decision.
Hammersmith (W6) sits primarily in Hammersmith and Fulham, so applications are decided by Hammersmith & Fulham Council. Conservation areas within W6 include Brackenbury, Ravenscourt, Hammersmith Mall, St Peter's Square, where full planning and a Heritage Statement are required. We confirm the planning route for your exact address before quoting.
Almost always. Any structural work behind house extension drawings in Hammersmith — new openings, steel beams, loft floors, foundations — needs Building Regulations approval covering structure (Part A), fire escape (Part B) and insulation (Part L), submitted to Hammersmith & Fulham Council Building Control or an approved inspector. On W6's typically terraced and semi-detached stock, a Party Wall notice to adjoining neighbours is normally required before the steelwork. We coordinate both as part of the Complete package.
In value terms, yes. With Hammersmith (W6) property at around £600, 000 for a flat and £1.2m-£1.8m for a house, a well-designed extension or loft typically returns more than it costs in added floor area and sale value. The bigger risk is an unapproved or non-compliant scheme — which is why council-ready drawings and a clean Building Control sign-off matter on W6 homes.
Householders often approach us after a neighbour used a different council. Our full range is set out for SW6, W12 and W14.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every W6 postcode district we draw in, the stock that dominates it and the authority that validates a house extension there. W6 fees below are the statutory England rates for 2026, not house extension estimates.
| Postcode | Area | Dominant stock | What it means for a house extension |
|---|---|---|---|
| W6 | Hammersmith / Brackenbury Village | Victorian terraces, mansion blocks | A house extension at an W6 address in Hammersmith / Brackenbury Village is determined by Hammersmith & Fulham Council under its own Local Plan policies for Hammersmith / Brackenbury Village. |
| W6 | Hammersmith | Victorian terraces, mansion blocks | Hammersmith sits inside W6; house extension proposals here are determined by Hammersmith & Fulham Council. |
| W6 | Brackenbury Village | Victorian terraces | Brackenbury Village sits inside W6; house extension proposals here are determined by Hammersmith & Fulham Council. |
| SW6 | Fulham / Parsons Green | Victorian terraces, mansion blocks | Adjoining district to W6, also inside Hammersmith and Fulham for house extension purposes. |
| W12 | Shepherd's Bush / White City | Victorian and Edwardian terraces | Adjoining district to W6, also inside Hammersmith and Fulham for house extension purposes. |
| W14 | West Kensington / Barons Court | Victorian and Edwardian villas | Adjoining district to W6, also inside Hammersmith and Fulham for house extension purposes. |
Roof pitch, wall build-up and plot depth change every few W6 streets, and each one changes what a house extension can achieve at that address.
How designation changes a W6 (Hammersmith / Brackenbury Village) house extension: Hammersmith & Fulham Council maintains 45 conservation areas, including Brackenbury Village, Fulham Palace Road, Parsons Green. Inside any of them a W6 (Hammersmith / Brackenbury Village) house extension cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. Hammersmith Grove sets the tone for W6 (Hammersmith / Brackenbury Village) casework.
Article 4 and your W6 (Hammersmith / Brackenbury Village) house extension: Article 4 removes PD for HMO conversions; restrictions on ground-floor shop-to-residential in certain streets. At a W6 address that matters twice over, because Hammersmith & Fulham Council applies the direction unevenly across W6 (Hammersmith / Brackenbury Village) — we read the W6 (Hammersmith / Brackenbury Village) policies map for the exact W6 address before quoting house extensions.
What W6 (Hammersmith / Brackenbury Village) is built from: Victorian and Edwardian terraces — particularly two-storey bay-fronted terraces south of the river in Fulham and Parsons Green; mansion blocks along main roads. Suburban-feel residential streets with strong conservation area coverage; well-established mansard precedents on many terraces. That mix decides the house extension route in W6 (Hammersmith / Brackenbury Village) more than the postcode does, and it is what a Hammersmith & Fulham Council case officer reads first. A householder application costs £548 paid to Hammersmith & Fulham Council direct, with 8 weeks to a decision once validated.
Sources for this W6 house extension page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.
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