Reading a Duplex Rent Roll: What the Numbers Actually Tell You

How to interpret a duplex's rent roll and separate real income history from optimistic projections before making an offer.

A rent roll looks like a simple document. Two lines, two rents, maybe a lease end date. But it is often the most misleading piece of paper in the entire transaction, because it tells you what has happened without telling you why, and it says nothing about what happens next.

Start by asking how long each tenant has been in place. A tenant who has stayed five years at a below-market rent tells you something different than a tenant who moved in three months ago at a rent that has never been tested by a renewal. Long-term tenants at low rents often mean an owner who avoided conflict. New tenants at high rents often mean a seller who priced a unit for the sale, not for the long run.

Check whether the rent includes utilities, parking, storage, or anything else that inflates the number without reflecting recurring income. A rent roll that bundles a garage fee into the monthly figure can make a property look ten or fifteen percent stronger than it actually is once you unbundle it.

Ask for the actual lease documents, not just a summary sheet. Verbal agreements, month-to-month arrangements, and rents that changed informally over time rarely show up accurately in a one-page summary. The lease is the only document that tells you what you are legally entitled to collect.

Finally, treat any rent roll as a starting point for negotiation, not a finished argument. If the spread between current rent and what you believe is realistic rent is wide, that spread belongs in your offer price, not in your optimism about future increases.