Loss to Lease Underwriting Skill

An underwriting-grade Skill that calculates Loss to Lease (and Lease Gain) for a multifamily rent roll, breaks the gap out unit by unit rather than netting it into one number, and gives you the underwriting read on what it means for the deal. From there, it projects the burn-off month by month as leases renew under whatever capture assumption you choose, full market, partial, or a capped annual increase, and runs a direct-capitalization valuation sensitivity showing exactly what that captured upside is worth at your cap rate. The core math runs through a bundled calculator rather than freehand estimation, so multi-period, compounding schedules come out reliably, not approximately.

Works on a single average rent roll or a full unit-level rent roll with mixed unit types and staggered lease expirations, in Claude chat. Vacant units are excluded automatically. If code execution isn’t available in your environment, the Skill tells you it’s estimating rather than presenting the same numbers as verified. (Read more about the skill here)

Note: No copy-pasting required, and it runs consistently every time.