Community Infrastructure Levy in City of London
Residential CIL in City of London is charged per m² of new gross internal area under the council's charging schedule (effective 2014-07-01). Mayoral CIL 2 Band 1 (£96.97/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 |
|---|---|---|---|
| RiversideResidential (Riverside zone). Zone map is Figure 1 inside the charging schedule PDF and the Annual CIL Rate Summary 2026 PDF (no separate map file).Source: City of London charging schedule · verified 2026-09-18 | £150.00 | £251.05 (2026) | £251.05/m² |
| Rest of CityResidential (Rest of City zone).Source: City of London charging schedule · verified 2026-09-18 | £95.00 | £159.00 (2026) | £159.00/m² |
Source: charging schedule · council CIL page · verified 2026-09-18. Charging schedule approved 1 May 2014 by Court of Common Council, effective 1 July 2014. Annual CIL Rate Summary 2026 (published at the odd filename annual-cil-rate-summary-2024.pdf) gives 2014 BCIS index 239 and 2026 RICS CIL Index 400. Non-residential: Offices and all other uses £75 (indexed £125.52 in 2026); medical, education, emergency services nil. Instalments per schedule: <=£500k in one payment within 60 days of commencement; >£500k two instalments (greater of £500k or half within 60 days, remainder within 240 days). CIL web page currently states a different instalment policy (threshold £100,000: greater of £100k or half within 60 days, remainder within 240 days). 2025 indexed residential rates: Riverside £245.40, Rest of City £155.42.
| Scheme | Liability | Exemption | At stake if filed wrong |
|---|---|---|---|
| Rear extension, 120 m², owner-occupier | £30,716 – £41,762 | Form 9 | £41,762 |
| Garden annex, 60 m², for a relative | £15,358 – £20,881 | Form 8 | £20,881 |
| New self-build house, 180 m² | £46,075 – £62,644 | Form 7 | £62,644 |
| Small developer, 3 flats, 240 m² (no exemption) | £61,433 – £83,525 | none | £83,525 |
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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