What is the risk in a land lease co-op?

The structure is easy to state. The cooperative owns the improvement and holds a long lease of the land, paying ground rent to the fee owner. Shareholders own shares in that corporation, so what they ultimately hold is an interest in a building sitting on land the corporation does not own.

Rent resets are the near-term risk. Leases set periodic adjustments, often tied to an appraisal of the land or to a formula, and an adjustment that lands during the holding period flows straight into maintenance. Buildings that have absorbed a reset carry visibly higher carrying charges, and buildings approaching one carry uncertainty instead.

Expiration is the long-term risk. As the remaining term shortens, lenders shorten with it, because a loan cannot sensibly run past the lease. That constrains the buyer pool, which constrains resale, and the effect starts long before the lease actually ends. Ask for the exact expiry date, not a rounded description of it.

Diligence is therefore lease diligence. Read the ground lease and its amendments, find the reset dates and the method, ask whether the corporation has any right to purchase the land, and read the building’s financial statements for what it has reserved against the next adjustment. A discount on price is not by itself a reason to skip that reading.