Community Infrastructure Levy in Southwark
Residential CIL in Southwark is charged per m² of new gross internal area under the council's charging schedule (effective 2017-12-01). 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 |
|---|---|---|---|
| Zone 1Council publishes the indexed rate as a formula '£435 x 400/291' (Ip=400, Ic=291) rather than a printed figure; 597.94 is that formula evaluatedSource: Southwark charging schedule · verified 2026-09-18 | £435.00 | £597.94 (2026) | £597.94/m² |
| Zone 2Published as '£218 x 400/291'; 299.66 is the formula evaluatedSource: Southwark charging schedule · verified 2026-09-18 | £218.00 | £299.66 (2026) | £299.66/m² |
| Zone 3Published as '£54 x 400/291'; 74.23 is the formula evaluatedSource: Southwark charging schedule · verified 2026-09-18 | £54.00 | £74.23 (2026) | £74.23/m² |
Source: charging schedule · council CIL page · verified 2026-09-18. Current Revised CIL Charging Schedule took effect 1 Dec 2017 (first schedule 1 April 2015). Base residential rates (R) £435/£218/£54 read from the council's Annual CIL Rate Summary 2026 PDF (which restates the adopted schedule rates); a direct PDF of the 2017 adopted schedule could not be fetched (main CIL page and legacy attachment links returned 404), so chargingScheduleUrl points to the 2026 rate summary. The moderngov 'Appendix 1 CIL charging schedule' PDF fetched is the Dec 2013 draft (£400/£200/£50) and is superseded. Other 2017 rates: office Z1 £76, hotel Z1 £272 / Z2-3 £136, student direct-let £109, retail £136, all other uses £0. Zones shown on CIL Zones Map attached to the charging schedule (not fetched). Instalments: follows Mayor's policy - 2 instalments where liability >£100k (60 and 240 days); otherwise full payment within 60 days. A further revision (direct-let student housing to £250/m2 in Zones 1-2) was examined June 2026, examiner's report 27 July 2026, going to Sept 2026 Executive - residential rates unchanged. Mayoral CIL Band 2 on top.
| Scheme | Liability | Exemption | At stake if filed wrong |
|---|---|---|---|
| Rear extension, 120 m², owner-occupier | £17,635 – £80,480 | Form 9 | £80,480 |
| Garden annex, 60 m², for a relative | £8,818 – £40,240 | Form 8 | £40,240 |
| New self-build house, 180 m² | £26,453 – £120,721 | Form 7 | £120,721 |
| Small developer, 3 flats, 240 m² (no exemption) | £35,270 – £160,961 | none | £160,961 |
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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