Published by Intelligent Office Boulder
August 21, 2026
3 minute read
Lease Math
Rent per square foot is the number everyone compares. It is also the number that hides the most.
Boulder office vacancy reached 16.9% in the first quarter of 2026, with space listed around $33.93 per square foot. A small business owner reads that, does quick arithmetic on a 300 square foot office, gets roughly $850 a month, and concludes that a real lease is affordable.
The arithmetic is correct and the conclusion is usually wrong. Here is everything that sits between the quoted rate and the amount that leaves your account each month.
Landlords quote rentable area, which includes your share of lobbies, corridors, restrooms, and mechanical rooms. The load factor in a multi tenant Boulder building commonly runs 12% to 18%. A 300 square foot office is quoted and billed closer to 345.
Rent is also usually quoted as a base rate with operating expenses, taxes, and insurance passed through on top. Ask whether a quote is full service or triple net before you compare it against anything.
Those pass throughs move year to year. In a building carrying high vacancy, the remaining tenants absorb a larger share of the same fixed operating costs, so a quote that looked competitive in year one can climb by year three without the base rate changing at all.
The Real Cost
The Term Trap
Moving from a three year term to a seven year term often unlocks 50% to 100% more tenant improvement allowance, because the landlord amortizes the investment over more months of guaranteed revenue. The concession is real, and it is priced.
For a Boulder company that raised a round last quarter or added two people this year, a seven year forecast is a guess. Signing one to save on carpet is an expensive way to buy flooring.
Put the fully loaded monthly cost of a lease next to the all in monthly cost of a private office and compare those two figures. A private office at Intelligent Office Boulder starts at $550 a month with furniture, internet, utilities, cleaning, a business address, mail handling, and meeting room access already inside the number.
The lease may still win. For a stable business that needs a specific layout and plans to stay put for a decade, it often does. Make that call against the total, and against a term you can actually commit to.
Watch
A short overview of how the office, address, and support services fit together for a small business.
Tell us how many people you need to seat and how often customers come in. We will give you one monthly number for the Boulder office that covers it.
Our Boulder office sits at 4450 Arapahoe Avenue, Suite 100, at Arapahoe and Foothills, a few minutes east of Pearl Street with free and ample parking. When you rent a private office here, you get a furnished room with 24/7 access, a business address, a private locked mailbox, and meeting rooms you can book when you need them.
You also get a front desk team you can walk out and talk to. They greet your visitors, handle your mail, and answer your business calls between 8 and 5. Every one of them works in the building you work in, which means your customers reach a person who knows where you are and what you do.
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