Where in Hammersmith and Fulham does a basement extension actually get determined?
Every Hammersmith and Fulham postcode district we draw in, the stock that dominates
it and the authority that validates a basement extension there. Hammersmith and Fulham fees below are the
statutory England rates for 2026, not basement extension estimates.
| Postcode | Area | Dominant stock | What it means for a basement extension |
|---|
| SW6 | Fulham / Parsons Green | Victorian terraces, mansion blocks | SW6 covers Fulham / Parsons Green only; Hammersmith & Fulham Council handles the basement extension. |
| W6 | Hammersmith / Brackenbury Village | Victorian terraces, mansion blocks | Hammersmith / Brackenbury Village sits wholly inside W6, so Hammersmith & Fulham Council validates every basement extension submitted from an W6 address. |
| W12 | Shepherd's Bush / White City | Victorian and Edwardian terraces | Shepherd's Bush / White City sits wholly inside W12, so Hammersmith & Fulham Council validates every basement extension submitted from an W12 address. |
| W14 | West Kensington / Barons Court | Victorian and Edwardian villas | West Kensington / Barons Court is split at W14. Either Hammersmith & Fulham Council or RBKC Planning can determine a basement extension here, so the W14 address is checked against both policies maps first. |
| SW10 | West Brompton / World's End | Georgian and Victorian terraces, listed buildings | West Brompton / World's End is split at SW10. Either RBKC Planning or Hammersmith & Fulham Council can determine a basement extension here, so the SW10 address is checked against both policies maps first. |
Which Hammersmith and Fulham neighbourhoods suit a basement extension best?
Roof pitch, wall build-up and plot depth change every few Hammersmith and Fulham
streets, and each one changes what a basement extension can achieve at that address.
- Sand's End (SW6) — Victorian terraces, riverside regen defines Sand's End, where victorian terraces, new-build set what a basement extension can do. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged across SW6. Any Sand's End basement extension is validated by Hammersmith & Fulham Council, with Imperial Wharf the usual Sand's End reference point on the site plan.
- Fulham (SW6) — basement extension work in Fulham means victorian terraces, mansion blocks. Fulham is Victorian bay-fronted terraces. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged throughout SW6. Hammersmith & Fulham Council decides the Fulham application, and Fulham Broadway anchors the Fulham location plan.
- Hammersmith (W6) — basement extension work in Hammersmith means victorian terraces, mansion blocks. Hammersmith is Victorian terraces, riverside character. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged throughout W6. Hammersmith & Fulham Council decides the Hammersmith application, and Hammersmith Bridge anchors the Hammersmith location plan.
- Shepherd's Bush (W12) — Victorian and Edwardian terraces defines Shepherd's Bush, where victorian and edwardian terraces set what a basement extension can do. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged across W12. Any Shepherd's Bush basement extension is validated by Hammersmith & Fulham Council, with Westfield London the usual Shepherd's Bush reference point on the site plan.
- White City (W12) — regenerated quarter, post-war estates defines White City, where post-war estates, new-build set what a basement extension can do. Post-war slab foundations make basements here expensive and rarely viable across W12. Any White City basement extension is validated by Hammersmith & Fulham Council, with Television Centre the usual White City reference point on the site plan.
- Parsons Green (SW6) — a basement extension in Parsons Green starts from victorian terraces, and Parsons Green reads as Victorian bay-fronted terraces around the green. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged in SW6. Hammersmith & Fulham Council assesses Parsons Green basement extensions against its own Parsons Green character guidance, and the location plan we draw for Parsons Green references Parsons Green park.
- Barons Court (W14) — a basement extension in Barons Court starts from edwardian mansion blocks, victorian terraces, and Barons Court reads as Edwardian mansion blocks, Victorian terraces. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged in W14. Hammersmith & Fulham Council assesses Barons Court basement extensions against its own Barons Court character guidance, and the location plan we draw for Barons Court references Barons Court Tube.
How do conservation areas and Article 4 affect a basement extension in Hammersmith and Fulham?
Conservation areas covering Hammersmith and Fulham: Hammersmith & Fulham Council runs 45, and Brackenbury Village, Fulham Palace Road, Parsons Green are the ones Hammersmith and Fulham owners meet most. A basement extension inside a Hammersmith and Fulham conservation area loses permitted development, so the Hammersmith and Fulham submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Brackenbury Village a basement extension is judged on the street elevation first.
Article 4 and your Hammersmith and Fulham basement extension: Article 4 removes PD for HMO conversions; restrictions on ground-floor shop-to-residential in certain streets. At a SW6 address that matters twice over, because Hammersmith & Fulham Council applies the direction unevenly across Hammersmith and Fulham — we read the Hammersmith and Fulham policies map for the exact SW6 address before quoting basement extensions.
The building fabric around Hammersmith and Fulham: 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. A basement extension in Hammersmith and Fulham is scoped against that stock first.
Which neighbouring authorities border Hammersmith and Fulham?
- Kensington and Chelsea — the Kensington and Chelsea boundary runs against Hammersmith and Fulham, so a basement extension a street from Hammersmith and Fulham is decided by RBKC Planning instead. Kensington and Chelsea runs 38 conservation areas across SW1 and its neighbours, which is why basement extensions priced for Hammersmith and Fulham are re-checked against Kensington and Chelsea policy whenever the Hammersmith and Fulham address sits on that edge.
- Brent — adjoining Hammersmith and Fulham, with 22 conservation areas centred on NW2. A basement extension on the far side of the Hammersmith and Fulham line is determined by Brent Council, so the Hammersmith and Fulham quote for basement extensions is checked against Brent guidance before it is issued.
- Ealing — cross the Hammersmith and Fulham boundary and Ealing Council takes the basement extension instead, applying 30 conservation areas of its own around W3. We re-price basement extensions at the Hammersmith and Fulham edge because Ealing policy and Hammersmith and Fulham policy rarely align on basement extension depth.
- Hounslow — the Hounslow boundary runs against Hammersmith and Fulham, so a basement extension a street from Hammersmith and Fulham is decided by Hounslow Council instead. Hounslow runs 30 conservation areas across W3 and its neighbours, which is why basement extensions priced for Hammersmith and Fulham are re-checked against Hounslow policy whenever the Hammersmith and Fulham address sits on that edge.
Sources for this Hammersmith and Fulham basement 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.
