In a rent-stabilized building, the expense side is the whole game.

In a rent-stabilized building, the revenue side is basically fixed. The rent guidelines board tells you what you can charge. So the expense side is the whole game.

Every dollar you save on operating costs drops straight to the bottom line, because you can't make it up on rent. That changes how you think about everything — staffing, vendor contracts, utilities, unit turnover.

Water and sewer is the one most operators underestimate. In New York City the rates move every year, and on a 100-unit building the annual bill is deep into six figures. A running toilet in ten units can quietly cost you more than a vacant apartment.

Insurance is the other one. Premiums have been climbing faster than allowable rent increases, and if you're not remarketing your policies at every renewal, you're leaving money on the table.

The discipline is simple: budget every line item like revenue is capped — because it is. The operators who win in stabilized housing aren't the ones with the cleverest rent projections. They're the ones who run the tightest building.

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