What development costs here.

Average conditions attached to a consent, from the decision notices we have read (15 in Lewisham), and how long each type takes from receipt to decision.

Most common conditions: other (15) · approved drawings (14) · time limit (13) · materials (7).

1 of the 145 agreements on file carry a pound total we have read: median £500, mean £500, largest £500, £500 in total. Small undertakings dominate the median; the extraction is still running, so treat these as from the deeds read, not the borough total.

Not enough read deeds with a stated unit count yet.

Scheme size is the unit count parsed from the proposal; agreements without one are left out here.

Every obligation in the Lewisham agreements we have read, grouped by what it is for — the money by type where a sum is stated, and how often each type appears at all (most obligations are unpriced: build this, provide that).

Red tick = London share across every deed read (2,311).

Approved schemes since 2015 with a unit count in the proposal; “with s106” means we hold the agreement — a floor, not the council's full count. Smallest scheme here with an agreement on file: 2 units.

Share of approved 10+ unit schemes with an agreement on file (boroughs with 100+ deeds held) — highest Croydon 83%, lowest Kingston Upon Thames 30% · Lewisham 41%. On small schemes (1–9 units) agreements are rare everywhere except where a small-sites tariff applies: Lambeth 56%, Hackney 54%, Kensington And Chelsea 48%, Camden 44%.

Policy thresholds differ too — most boroughs seek affordable housing from 10 units (national threshold), some (Islington) charge a small-sites contribution from the first unit; the deed rate above is what actually happens, not what the policy says.