Medical Office Stability: Consistent Yields in a Fluctuating Commercial Landscape

Commercial Real Estate | Orange County, CA — September 7, 2026

While traditional office towers across Orange County continue clawing their way back from the remote-work hangover, one corner of the office sector never needed the recovery narrative in the first place. Medical office buildings (MOBs) have quietly become the most defensive asset class in commercial real estate, and nowhere is that more visible than right here in OC. If you’ve been chasing yield in a market where cap rates keep shifting under your feet, it’s worth understanding why this niche has stayed so boring — in the best possible way.

The Numbers Tell the Story

Orange County’s medical office vacancy currently sits around 8.5%, with asking rents pushing past $3.48 per square foot, according to Colliers’ latest local market data. Compare that to the county’s broader office market, where overall vacancy was running about 15.7% in Q1 2026 — nearly double the medical office rate, even after a year-over-year improvement of roughly 335 basis points reported by Cushman & Wakefield.

Zoom out to the national picture and the pattern holds. Medical office occupancy averaged 92.3% in 2025, dwarfing the 80.2% average for conventional office space. MOB rents climbed 6.2% over the past two years while general office rents actually fell 3.4% over the same stretch. Investors have taken notice: medical office transaction volume grew from roughly $29 billion in 2016 to about $154 billion in 2025, and institutional-quality cap rates have compressed 25 to 50 basis points from 2023-2024 levels, now averaging around 6.3% nationally, with the broader range for Q1 2026 deals running 5.5% to 8.5% depending on tenant credit, lease structure, and location.

Why Medical Office Keeps Winning

The demand driver isn’t complicated — it’s demographic math. Orange County is home to more than 450,000 residents aged 65 and older, roughly 14% of the county’s population, and that share is projected to climb toward 18-25% by the 2040s as the county continues to age in place. Older patients need more frequent primary care visits, chronic disease management, and outpatient procedures, and they need that care close to home, with easy parking and accessible buildings — exactly the profile MOBs are built for.

That demand is showing up in leasing activity. The broader Los Angeles-Orange County metro logged roughly 331,000 square feet of medical office leasing in a single recent quarter and more than 1.5 million square feet over the trailing twelve months, with major health systems — Providence, Kaiser Permanente, UCLA Health, and Cedars-Sinai among them — anchoring much of that absorption.

Supply Is the Investor’s Best Friend Here

Unlike multifamily or industrial, where developers can chase demand with new construction, medical office supply in Orange County is structurally constrained. Land scarcity and an entitlement and permitting process that can take years — often longer than a typical health system’s planning horizon — have kept new construction well below what demographic demand alone would justify. For owners of existing, well-located medical buildings, that scarcity is doing a lot of the heavy lifting on rent growth and occupancy without any effort on their part.

What This Means If You’re Underwriting a Deal

For commercial investors weighing where to deploy capital in a market where cap rates on office, retail, and even some multifamily product have been volatile, medical office offers something increasingly rare: a defensible, demographically backed thesis. A few things worth keeping in mind as you evaluate opportunities:

Tenant credit quality matters more than almost any other variable — a single-tenant building leased to a major health system on a long-term lease will price tighter than a multi-tenant building full of independent practitioners, even in the same submarket.

Location relative to hospital campuses and residential density drives both leasing velocity and rent premiums, since patients and practitioners alike are optimizing for convenience.

Building specs — ceiling heights, HVAC capacity, plumbing for exam rooms, ADA accessibility — carry real weight in medical office underwriting in a way they simply don’t for general office space, and retrofitting older buildings to meet those specs is where a lot of “value-add” medical office plays either pencil or don’t.

The Bottom Line

Medical office isn’t the sector generating headlines about record rent growth or trophy sales, and that’s precisely the point. In a commercial landscape where cap rates have been a moving target and traditional office has struggled to find its footing, Orange County’s medical office market has delivered something investors have been craving: predictability, backed by demographics that aren’t going anywhere. If you’re looking to place capital in an asset class with a durable demand story and structurally limited new supply, this is a niche worth a serious look — whether that means acquiring a stabilized asset or evaluating a value-add conversion candidate near one of the county’s major health campuses.

The Asbury Team works both sides of Orange County’s commercial market, from investment sales to tenant representation, and we track these submarket dynamics closely. If you’re considering a medical office acquisition, disposition, or lease, reach out — we’d be glad to walk through what we’re seeing on the ground.