For years, a specific kind of quiet defined certain houses on The Hill. A five-bedroom rental near campus, three names on the lease, two more people living there anyway because Boulder capped how many unrelated adults could legally share a roof. Those extra roommates paid rent. They just didn't exist on paper. If the water heater broke or the landlord decided to change the locks, they had no standing to object. Colorado lawmakers cited exactly this pattern when they passed the bill that ended it, and Boulder was one of the cities where the pattern ran deepest.
That rule is dead now. But if you're evaluating a University Hill property as an investment, the mistake is assuming the constraint disappeared. It didn't. It moved from a headcount written into city code to a square-footage calculation written into the building maintenance standard. That distinction is the whole story for anyone underwriting rental income near CU Boulder in 2026.
What actually happened, and when
Colorado's House Bill 24-1007, known as the HOME Act, was signed by Governor Polis on April 15, 2024, and took effect July 1, 2024. It strips cities and counties of the authority to limit how many people can live together based on family relationship. A city can still cap occupancy, but only through demonstrated health and safety standards such as building code, fire code, or wastewater capacity rules, or through affordable housing program guidelines. Boulder's response, laid out on the city's own occupancy limits page, was to administratively stop enforcing any rule based on the number of unrelated people in a unit and shift enforcement entirely to the International Property Maintenance Code.
Worth sitting with for a moment: Boulder residents had already weighed in on this exact question and said no. In 2021, city voters rejected a ballot measure to loosen local occupancy limits, 52 to 48. That's a close vote in a city that leans progressive on most housing questions, and it tells you the old rule had real local support, not just inertia. The state legislature overrode that outcome three years later. Whatever you think of the policy, it's useful context for a buyer trying to gauge how contested this ground still is in the neighborhood you're about to invest in.
Before the override, Boulder's cap topped out at five unrelated adults depending on zoning, higher than Fort Collins' long-standing three-person "U+2" limit but still a hard ceiling that had nothing to do with the size of the house. Over five years, the city logged roughly 150 complaints tied to occupancy violations, and just over half resulted in a confirmed violation. That's the enforcement backdrop the new rule replaced.
The number that replaced the headcount
Here's what actually governs a University Hill rental house now. The IPMC requires every bedroom to be at least 70 square feet, and it requires at least 50 square feet per occupant of that bedroom. Those aren't the same test, and the difference matters for underwriting.
A single occupant needs a room of at least 70 square feet, since that flat minimum exceeds the 50-square-foot-per-person threshold at one person. But add a second occupant to that same room and the math changes: two people require at least 100 square feet, not 70. A 90-square-foot bedroom clears the flat minimum easily but still can't legally house two people under the per-occupant standard.
Rough translation for a walk-through:
| Bedroom size | Occupants the room can legally support |
|---|---|
| 70 to 99 sq ft | 1 |
| 100 to 149 sq ft | 2 |
| 150 to 199 sq ft | 3 |
| 200+ sq ft | 4 |
That table is the actual ceiling on a University Hill rental house now, not the old headcount rule and not an assumption that the law change means unlimited density. A five-bedroom Victorian near Ninth Street with modest, original-era bedrooms might legally support fewer total occupants than a newer five-bedroom build with larger rooms, even though both have the same bedroom count on the listing sheet. The code also sets minimum living and dining room square footage tied to the total number of occupants in the unit, so a bedroom count that pencils on paper can still fail if the shared common space doesn't scale with it.
If you're comparing two University Hill houses purely by bedroom count, you're comparing the wrong number.
The licensing catch nobody mentions
There's a second wrinkle that catches buyers who assume the state law settled everything. Boulder's rental licensing code carries its own owner-occupied exemption, separate from the occupancy rule. A dwelling occupied by the owner, or by family members at least 21 years old, that rents to no more than two people unrelated to the owner's family, qualifies for a licensing exemption. Cross that threshold to three unrelated tenants and you need a rental license, full inspection cycle included, even though the city no longer caps how many unrelated people can legally share the space.
In practice, that means a buyer planning to live in part of a University Hill house and rent rooms to help cover the mortgage needs to plan for licensing the moment they add a third unrelated tenant, regardless of what the state occupancy law technically allows. The headcount rule that used to cap the whole property is gone. A different headcount, tied to licensing rather than occupancy, is still very much alive.
What this means for underwriting a purchase
None of this shows up on a listing sheet. It shows up when you walk the property with a tape measure and pull the rental license history.
A few things worth doing before you make an offer on a University Hill rental property. Measure every bedroom rather than trusting the listed bedroom count, since the IPMC math cares about square footage, not the label on the floor plan. Ask whether the property currently carries a valid rental license and whether that license transfers or needs to be reapplied for at sale, since Boulder's rental license code ties the license name to the deed. Review the existing lease if tenants are staying through the transaction, since a landlord's own lease terms can still set occupancy tighter than city code now permits, and that lease controls until it expires or is rewritten. If the property is a condo or shares an HOA, pull the governing documents separately. Private HOA covenants operate independently of the state occupancy law and can still restrict rentals or set their own occupancy terms regardless of what the city or state allows.
On rent itself, University Hill's numbers as of mid-2026 tell a market still shaped by the academic calendar more than by the occupancy law change. Average asking rent across the neighborhood sat near $1,647 a month as of June 2026, with house rentals averaging well above apartment rentals, a gap that reflects the premium tenants pay for whole-house student housing near campus rather than a shift tied to the new occupancy rules. As of late August 2026, roughly six in ten University Hill housing units were renter-occupied rather than owner-occupied, according to Census-based estimates, a ratio that has defined this neighborhood for decades and isn't about to change because a state law rewrote how landlords count roommates.
The occupancy law didn't create a rental gold rush on The Hill. It removed one legal barrier and replaced it with a different one that requires more precision to evaluate, not less.
A few questions worth asking before you buy
Does this affect Boulder's short-term rental rules too? No. Boulder's short-term rental licenses remain restricted to owner-occupied primary residences, a separate framework that the occupancy law change doesn't touch. If short-term income is part of your plan for a University Hill property, that's a different set of rules entirely.
Can a landlord still legally limit roommates below the new code maximum? Yes. A lease can still set a lower occupancy number than the city's code allows. The lease controls what a tenant can do on that property regardless of what the state law technically permits citywide.
Does an HOA's own rental policy still apply? Yes. HOA covenants are a private contract, not a municipal ordinance, and they aren't affected by HB24-1007 or by Boulder's enforcement shift. Always review governing documents on any condo or townhome purchase in University Hill separately from the occupancy question.
Buying a rental property near CU Boulder was never just about counting bedrooms, and it's less so now that the rule everyone assumes they understand has quietly become a square-footage calculation. If you're evaluating a University Hill house, a condo near Pearl Street, or any income property in Boulder County, The Bernardi Group can walk the numbers with you before you write an offer. Start Your Strategy Session and bring the listing sheet. We'll bring the tape measure.
