Community Infrastructure Levy in Hounslow
Residential CIL in Hounslow is charged per m² of new gross internal area under the council's charging schedule (effective 2015-07-24). Mayoral CIL 2 Band 2 (£72.73/m²) is charged on top by the Greater London Authority. Extensions under 100 m² that create no new dwelling are not liable (reg 42); owner-occupiers can claim the self-build, annex or extension exemption — but only before work starts.
| Zone | Adopted rate | Indexed rate | Applied |
|---|---|---|---|
| CIL Zone 1 (East)Residential (all forms except student housing). Latest published indexed figure is 'start of 2025' (to nearest £1) from the council's Infrastructure Funding Statement 2024/25; no 2026 £ figure published.Source: Hounslow charging schedule · verified 2026-09-18 | £200.00 | £302.00 (2025) | £302.00/m² |
| CIL Zone 2 (Central)Residential (all forms except student housing). Latest published indexed figure is 'start of 2025' (to nearest £1) from the council's Infrastructure Funding Statement 2024/25; no 2026 £ figure published.Source: Hounslow charging schedule · verified 2026-09-18 | £110.00 | £166.00 (2025) | £166.00/m² |
| CIL Zone 3 (West)Residential (all forms except student housing). Latest published indexed figure is 'start of 2025' (to nearest £1) from the council's Infrastructure Funding Statement 2024/25; no 2026 £ figure published.Source: Hounslow charging schedule · verified 2026-09-18 | £70.00 | £106.00 (2025) | £106.00/m² |
Source: charging schedule · council CIL page · verified 2026-09-18. Schedule approved by Full Council 14 July 2015, effective 24 July 2015. Charging zone map is Figure 1 inside the schedule PDF (no separate map URL). Retail >280 sqm £155; healthcare/education/emergency nil; all other uses £20 (student housing charged at all-other-uses rate); covered residential parking charged at residential rate. Council page states 2026 index value is 400 but no 2026 Annual CIL Rate Summary with indexed £ figures was found (2020 and 2021 summaries only), so the latest published indexed figures (start of 2025, from IFS 2024/25: East £302, Central £166, West £106, retail £234, other £30) are used with indexYear 2025. Instalments policy (effective 24 July 2015): liability <=£500,000 paid in full within 60 days of commencement; >£500,000 two instalments - greater of £500,000 or half within 60 days, remainder within 240 days. Council consulted on a draft revised charging schedule (proposed Central £160, West £100) - not adopted as of pages fetched. Schedule PDF is hosted on council's exacom CIL portal, linked from the council page.
| Scheme | Liability | Exemption | At stake if filed wrong |
|---|---|---|---|
| Rear extension, 120 m², owner-occupier | £21,448 – £44,968 | Form 9 | £44,968 |
| Garden annex, 60 m², for a relative | £10,724 – £22,484 | Form 8 | £22,484 |
| New self-build house, 180 m² | £32,171 – £67,451 | Form 7 | £67,451 |
| Small developer, 3 flats, 240 m² (no exemption) | £42,895 – £89,935 | none | £89,935 |
Indicative — the council's Liability Notice is definitive. Under 100 m² and no new dwelling is not liable at all (reg 42).
Free liability range and exemption check. The £29 report gives the filing order for Forms 1, 2, 6 and 7/8/9 with dates and the surcharge at each step.
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