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Why Are Class B and C Office Spaces Seeing the Greatest Drops?

Vacancy Rates and Leasing Trends: A Closer Look at the Data The rising vacancy rates are a major disruptor in the traditional office space paradigm.

schedule9 min read|sell0 topics
listIn This Guide
  1. 01Vacancy Rate Trends
  2. 02Market Drivers
  3. 03Class B and C vs. Class A Performance
lightbulbKey Takeaways
  • Class B and C office buildings are experiencing the steepest value declines post-pandemic
  • Older buildings lack the amenities, technology, and sustainability features tenants now demand
  • Flight-to-quality trend is concentrating demand in Class A properties at the expense of lower tiers
  • Conversion to residential, medical, or mixed-use may be the best path for obsolete office stock

Rising office vacancy rates have fundamentally shifted market dynamics from landlord-favorable to tenant-advantaged conditions. The national office vacancy rate climbed to 18.8% in April, up 210 basis points year-over-year. San Francisco's vacancy surged 650 basis points to 25.9%, reflecting structural market changes.

This dramatic shift provides tenants unprecedented negotiating leverage. Abundant available space enables demand for lower rents, better amenities, and flexible lease terms previously unavailable.

Market Drivers

Multiple factors converge to create current office headwinds:

Hybrid Work Adoption: Remote and hybrid models have reduced demand for traditional office space, requiring building owners to reconfigure layouts and accept lower occupancy rates.

Rising Interest Rates: With rates meaningfully higher than 15-year averages, property values decline without corresponding rent increases. Nearly $1.5 trillion of commercial real estate debt requires refinancing before 2026, while credit availability has tightened for smaller lenders.

Oversupply of Aging Stock: Many markets contain excessive older office buildings that lack modern amenities and technological infrastructure, making them uncompetitive against newer Class A properties.

Class B and C vs. Class A Performance

Class B and C properties bear the brunt of this market shift. These older, less centrally located buildings experience substantially higher vacancy rates than premium Class A properties. Companies increasingly upgrade to Class A spaces when reducing total footprint, leaving Class B and C properties underutilized.

Regional variances compound the problem. Bustling urban centers maintain Class A demand, while suburban and secondary locations struggle with Class B and C vacancies. Tech-heavy regions experienced steeper work-from-home adoption, disproportionately impacting regional office markets.

The

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About this guide: This content is for educational purposes. Market data referenced reflects conditions as of Q2 2026. Sources include CoStar, CBRE Research, NAR, and industry publications. Always consult with qualified CRE professionals before making investment decisions.
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