Community Infrastructure Levy in Merton
Residential CIL in Merton is charged per m² of new gross internal area under the council's charging schedule (effective 2014-04-01). 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 |
|---|---|---|---|
| Colliers Wood, Raynes Park and WimbledonResidential.Source: Merton charging schedule · verified 2026-09-18 | £220.00 | £368.20 (2026) | £368.20/m² |
| Mitcham, Morden and West BarnesResidential.Source: Merton charging schedule · verified 2026-09-18 | £115.00 | £192.47 (2026) | £192.47/m² |
Source: charging schedule · council CIL page · verified 2026-09-18. Schedule approved 20 November 2013, effective 1 April 2014. Residential charging zones shown on the 'Community Infrastructure Levy Charging Zones Map' inside the schedule PDF (no separate URL). Only other rate: retail warehouses/superstores £100 borough-wide (2026: £167.36). 2026 effective rates from Annual CIL Rate Summary 2026 (https://www.merton.gov.uk/sites/default/files/2025-12/Annual%20CIL%20Rate%20Summary%202026.pdf, created 8 Dec 2025): index 400/239. Instalment policy is contained in 'CIL in Merton' guide June 2014 (/assets/Documents/cil_guide_june_14.pdf) - not fetched. Council page also links schedule at /assets/Documents/merton_cil_charging_schedule.pdf.
| Scheme | Liability | Exemption | At stake if filed wrong |
|---|---|---|---|
| Rear extension, 120 m², owner-occupier | £31,824 – £52,912 | Form 9 | £52,912 |
| Garden annex, 60 m², for a relative | £15,912 – £26,456 | Form 8 | £26,456 |
| New self-build house, 180 m² | £47,736 – £79,367 | Form 7 | £79,367 |
| Small developer, 3 flats, 240 m² (no exemption) | £63,648 – £105,823 | none | £105,823 |
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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