Rent per Foot

Rent per square foot links unit size to revenue assumptions. A smaller unit may command more rent per square foot while producing less rent in total. The right comparison depends on how much floor area each unit uses and what renters in that market will pay.

Unit size and rent are independent assumptions

Illustrative 200 × 65 ft double-loaded floor plate with a 5 ft corridor. Unit depth is 30 ft; unit width is selected net unit area / depth. Whole bays fit independently on each side; leftover end area is unleased. Monthly rent per SF is an assumption, not a market measurement. NOI uses 95% collection and 35% expenses. Hard cost is $200/GSF.

That assumption moves through the pro forma: projected rent is adjusted for vacancy and expenses, then used to estimate income and value. If the rent assumption changes, the project’s capacity to carry cost changes too. This is why a unit-size decision can be financial as well as spatial.

The relationship is a prompt for testing, not a universal design formula. Rent varies by location, unit quality, amenities and market conditions. An architect can ask what rent and size assumptions support the proposed mix, then show the spatial consequences of alternatives. Comparing total rent as well as rent per area prevents the ratio from standing in for the entire business case.