The Mixed-Use Owner's Income Audit: 12 Things to Check Before You Lease Another Space

Mixed-use buildings are the workhorse of the outer boroughs: a storefront, two or three floors above it, and an owner who has held it for a decade or two and manages it in the evenings. They are also, in my experience across 100+ landlord engagements, the most under-earning asset class in the city, because every floor is treated as a separate problem and nobody audits the whole.

Below is the audit I run on every mixed-use property before advising an owner on a single lease. Most buildings fail at least four of these. Fixing them is where the 50–300% income growth comes from.

The rent roll

1. Every lease, expiration and escalation, on one page. If you cannot see the next 36 months of expirations at a glance, you are negotiating each renewal blind. Half the owners I meet do not have this document.
2. Rent per square foot by floor, against current demand. Not against the building's history — against what an active tenant in this submarket pays today for that size and condition. Upper floors in Bushwick, Ridgewood and Sunset Park are routinely 30–60% under demand.
3. Who is actually in the space. Subtenants, roommates, businesses that have quietly changed — the rent roll says one thing and the building says another. The gap is leverage at renewal.

The ground floor

4. Retail term and structure. A ten-year flat retail lease signed in a soft market is the single most expensive document most mixed-use owners hold. If the term is short, the renewal is your best income event in years. If it is long, the question becomes whether a buyout, a relocation or a percentage-rent amendment is worth pursuing. 5. Use and frontage. Is the storefront being used for the highest-value purpose the zoning allows? Ground floors on commercial corridors have moved from dry goods to food, wellness, and service uses that pay materially more per foot. 6. Basement and rear yard. Almost always given away for free in the retail lease, and almost always worth separating and pricing.

The upper floors

7. Unit size versus the active tenant. Floors delivered as one 2,500-square-foot office rarely lease quickly in the boroughs. The same floor as two or three units, each with a door and a name, leases faster and for more. This is the highest-return change most owners never make. 8. Certificate of occupancy versus actual use. If the C of O says office and the floor has a residential tenant, or vice versa, you have both a risk and an opportunity. Clean it up before you re-lease. 9. Access, light and ceiling height as pricing inputs. A walk-up third floor with north light and 11-foot ceilings is a creative-office product. A second floor with a private entrance is a professional-services product. Price them as what they are, not as "upstairs."

The expense side

10. Pass-throughs you are not passing through. Tax escalations, water, sprinkler, insurance increases — customary in NYC commercial leases and missing from a surprising number of long-held mixed-use buildings. Adding them at renewal is pure income. 11. Utilities and metering. One electric account feeding three tenants is a monthly subsidy you are paying. Submetering pays for itself within the first year in nearly every case.

The exit

12. What a buyer's underwriter would do with this rent roll. Every dollar of stabilized annual income in a Brooklyn or Queens mixed-use building is worth roughly $14–$18 of value at current cap rates. An owner who raises income by $60,000 a year through the eleven items above has added roughly $900,000 to a million dollars of value, whether or not they ever sell.

Mixed-use income is not lost in one big mistake. It is lost in nine small ones that nobody has ever written down together.

What to do with the audit

Run it. Score the building. Then sequence the fixes: renewals and pass-throughs first (no capital, immediate), submetering and C of O clean-up second, unit division third. That sequencing is the consulting engagement — a plan for the whole building, from someone whose fee does not depend on any one lease being signed.