COSTAR GROUP INC

Our headquarters is located at 1331 L Street, NW, in downtown Washington, DC, where we occupy approximately 169,000 square feet of office space, with a lease that expires on May 31, 2025 (with two five-year renewal options). Our headquarters is used primarily by our North America operating segment. Our principal facility in the U.K. is located in London, where we occupy 42,000 square feet of office space. Our lease for this facility has a term ending August 31, 2025. This facility is used by our International operating segment, including our recent acquisition, OnTheMarket.

Our staff in Richmond, Virginia occupy an owned building located at 501 S 5th Street, where we occupy approximately 310,000 square feet, an owned building located at 901 Semmes Avenue, where we own and occupy approximately 117,000 square feet; and leased space at 951 E Byrd St., where we occupy approximately 97,000 square feet. These locations house research, product development and sales functions. All of our owned properties are held under fee simple ownership and are not materially encumbered.

We also operate certain of our research, development and sales functions out of additional leased office spaces in Irvine, California; San Diego, California; and Atlanta, Georgia. Additionally, we lease office space in a variety of other metropolitan areas. These locations include, among others, the following: Hendersonville, Tennessee; Norfolk, Virginia; Boston, Massachusetts; New York, New York; San Francisco, California; and Los Angeles, California.

We believe these facilities are suitable and appropriately support our business needs.