Rohnert Park's Apartment Risk Is Shrinking Student Demand, With New Supply Years Away

In the second quarter of 2026, Rohnert Park buildings made up 135 of the 282 apartment units listed for sale across Sonoma County. That is nearly half the county's offered inventory, from a city that is nowhere near half the county's housing stock. Three listings accounted for those units. Park Meadows at 7425 Camino Colegio, 61 units, was asking $15.1 million at a 5.96% cap rate. Allegro Student Apartments at 8025 Beverly Drive, 36 units, was asking $11 million at 6.25%. The Grove at 7400 Bridgit Drive, 38 units, was asking $8.55 million, also at 6.25%. Countywide, closed sales that quarter averaged a 5.5% cap rate.

Those are asking terms from a snapshot taken last summer, not closed prices. They still raise the right question for anyone looking at an income property in this city. A buyer of a Rohnert Park building near campus is buying a tenant base tied to Sonoma State University. The size of that base has changed faster than anything else in the local rental math.

The Number to Check Before the Cap Rate

On its fall 2026 census day, September 15, Sonoma State's Division of Academic Affairs reported a total headcount of 4,527. A year earlier the figure was 5,000, and ten years before that it was 9,408, according to the Sonoma State Star.

The total hides a shift inside it. Post-baccalaureate students, meaning credential and graduate students, rose to 618 this fall and now make up nearly 14% of the student body. The university says that group has grown four years in a row. For fall 2025, SSU's facts page lists 4,392 undergraduates and 608 graduate and post-baccalaureate students.

The fall 2026 undergraduate figure comes from subtracting the 618 post-baccalaureate students from the 4,527 total.

The whole decline, and then some, came from undergraduates. That matters to a landlord because undergraduates are the group that rents rooms by the bed in the off-campus market. In one year the university lost close to 500 of them. Graduate and credential students are a smaller group, and many are working professionals who rent differently. A three-bedroom leased to three sophomores and a unit leased to one credential student are different underwriting problems.

Where Those Students Lived

In January 2025, the Press Democrat reported that the campus could house up to 3,100 students. About 65% of undergraduates lived off campus, mostly in Rohnert Park's K, O and W sections. The same article quoted the city's leaders on how much the university shapes the local economy. Gerard Giudice, then mayor, is quoted in the headline: "A lot of people say we aren't a college town, but we are."

SSU's own facts page now lists about 1,500 residential students, mostly first- and second-year. That count is not an occupancy rate, and the two figures come from different dates. Set beside the reported capacity of up to 3,100, though, it suggests campus housing has room to take more students. Any student the university houses on campus is one fewer prospective tenant for a fourplex on a K-section street.

The Press Democrat framed this as a possible upside for the city. Sonoma County rentals were tight, and students leaving could free up units. For an owner, the same effect shows up as a longer re-leasing period on units that used to turn over each August without much effort.

The New Supply Arrives Too Late to Explain Anything

Investors in most Bay Area submarkets underwrite against new construction: lease-up concessions down the street and new Class-A units pulling tenants up-market. In Rohnert Park the market-rate pipeline is far enough out that it cannot explain much about rents in 2026 or 2027.

Sources for the table are the Press Democrat's October 16 report on the downtown plans, the city's Development Activity Tracker, updated October 20, 2026, and Burbank Housing's groundbreaking announcement.

The downtown site has been a long project. The city bought the former State Farm campus for $12.5 million in April 2022, after an earlier developer pulled out, and approved selling it to CenterCal for $11.2 million last November. The Terraces will serve a different population than student renters. Mountain Shadows has not yet filed a formal application.

So for an existing building near campus, the next few years of rent performance depend mostly on demand: how many undergraduates enroll, and how many of them live off campus. Rent growth and vacancy assumptions should be built from enrollment, not from a list of projects.

What Could Bring Some Demand Back

Athletics will return. The Sonoma State Star reported on September 13 that the Seawolves are scheduled to come back in the 2027-28 academic year with 10 NCAA Division II teams, six women's and four men's. The university's commitment tracker shows $8 million set aside for a possible Division II return. It also covers a one-time $45 million state commitment, of which $33,297,947 had been allocated as of August 2026. Before the cuts, the Press Democrat reported that about 150 of roughly 230 student-athletes lived on campus. On those 2025 ratios, the team rosters alone would add only a small number of off-campus renters.

The university is also recruiting. It hosted the CSU College Night for Northern California on September 14, with all 22 CSU campuses present. Recruiting events like that one will show up in the fall 2027 census, if they show up at all.

The repair work follows real losses. The 2025 cuts involved more than 100 layoffs, six closed departments and nearly two dozen degree programs, according to the Press Democrat. Fewer programs and fewer faculty and staff also mean fewer renters connected to the university in some way.

Underwriting a Building Near Campus

None of this makes a Rohnert Park building a poor purchase. In the Q2 listings, sellers were already asking cap rates above the county's closed-sale average, which suggests some of this risk was being priced in. The question is whether the rent roll supports the price you would pay. These are the questions I would work through on any offering in the K, O or W sections:

1. What share of the rent roll is student-occupied, and on what lease terms? Twelve-month leases signed each August behave differently from year-round tenancies held by working households.
2. How did occupancy and re-leasing time change from August 2024 through August 2026? Those three leasing seasons cover the cuts and the two most recent enrollment declines.
3. Are rents quoted per bed or per unit? Per-bed pricing loses value faster when roommates are harder to find.
4. Would the floor plans work for non-student renters if needed? Unit mix, parking and laundry decide how easily a building can shift its tenant base.
5. What vacancy assumption does the pro forma use, and where does it come from? A countywide figure is not a Rohnert Park student-market figure. Ask for property-level history.
6. Does the deal still work if undergraduate enrollment stays flat or keeps falling? Run that case before you count on athletics or recruiting to bring renters back.

The September census answers one of these questions for the whole market. The rest come from the seller's lease files, rent rolls and turnover records for August 2024 through August 2026.

If you are weighing a Rohnert Park income property, or deciding whether to sell one before the next leasing season, Mershad Rezayati can help you separate the student share of the rent roll from the rest and price the building on the demand it actually has. Get in touch to go through the numbers on a specific property.