Rent Per Square Foot Explained

Commercial rent gets quoted in dollars per square foot per year, which is a convention that confuses anyone used to monthly residential rent. Once the basic math is clear, comparing properties becomes far easier, and the conversation with brokers and landlords across the Salt Lake City commercial market makes a lot more sense.

The formula takes the quoted annual rate, multiplies by square footage, and divides by 12 for the monthly payment. A 4,200 square foot office suite quoted at $24 per foot works out to 4,200 times 24, or $100,800 annually, divided by 12, for $8,400 per month in base rent. That is the starting point. What gets added depends on the lease structure.

Three lease types dominate the Salt Lake City market and each calculates total rent differently. Gross leases bundle most expenses into one rate. The quoted number is close to total occupancy cost. Modified gross leases split certain expenses between landlord and tenant, often using a base year approach where the tenant pays increases above the first year’s expense level. Triple net leases quote a lower base rent and add tenant share of property taxes, building insurance, and common area maintenance on top. A $16 NNN rate with $5 per foot of NNN charges totals $21 per foot all in.

Comparing properties without normalizing to the same lease structure produces wrong conclusions consistently. A Silicon Slopes office at $30 modified gross is different from a Sugar House office at $22 NNN with $7 of NNN charges. Both round to roughly $30 per foot all in, but one looks much more expensive on the asking sheet. The right comparison is total occupancy cost per foot, not headline rate.

Escalations compound rent over the lease term. Most commercial leases include annual increases of 2.5 to 3 percent, sometimes tied to CPI with caps and floors. A $20 starting rate with 3 percent escalations becomes about $26 by year 10. Tenants signing longer leases should model total rent across the full term, because the year one number understates true commitment significantly.

Free rent and tenant improvement allowances reduce effective rent. Three months of free rent on a five year lease at $24 per foot saves the tenant six months of expense, which works out to an effective rent reduction of about $1 per foot averaged across the term. A $40 per foot TI allowance on a 3,000 foot suite is $120,000 of landlord investment that offsets buildout costs the tenant would otherwise fund. Both move real money even though neither shows up in the headline rent.

Useable versus rentable square footage adds another layer. Rentable square footage includes the tenant’s exclusive space plus a proportional share of common areas like lobbies, hallways, and restrooms. Useable square footage is just the tenant’s exclusive space. Multi tenant office buildings in downtown Salt Lake City often charge rent on rentable footage that is 12 to 18 percent larger than the useable footage. Tenants who care about cost per useable foot need to make that calculation explicitly.

Utah’s property tax reset on sale affects NNN tenants directly. When a building sells, taxable value typically resets to market, often increasing the tax bill noticeably. Under NNN leases, that increase flows through to tenants. Tenants signing NNN leases shortly before or after a building sale should verify whether the quoted NNN number reflects the new tax basis.

Omada Commercial, known as top commercial real estate agent in Salt Lake City, runs full occupancy cost comparisons for tenants evaluating space across the Wasatch Front. Understanding rent per square foot properly is the foundation for any rational leasing decision.