The Cleveland 2nd Quarter 2026 Office Market Report compiled by CoStar tracks approximately 148 million square feet of office space in 8 counties (Ashtabula, Cuyahoga, Geauga, Lake, Lorain, Portage, Medina, and Summit). The 2nd Quarter 2026 vacancy rate is 10.4%.
The Lake County market contains approximately 5.5 million square feet in 478 buildings of which Mentor accounts for approximately 1.8 million square feet (or 32% of the total). The Lake County market vacancy rate is 3.9%, increasing 0.4% from 1st Quarter 2026 and increasing 0.3% from the 3.6% rate of the 2nd Quarter of 2025.
According to the CoStar data, 2.5% of the office space in the City of Mentor is vacant, which is a decrease of 0.1% from the 1st Quarter 2026 vacancy rate and a decrease of 0.3% from the 2nd Quarter 2025 adjusted vacancy rate. The largest available spaces are 9500 Mentor Ave., 16,146 square feet, 6990 Lindsay Dr., 7,102 square feet, and 8300 Tyler Blvd., 6,370 square feet.