Gridline Properties | 652 followers on LinkedIn. Full-service commercial real estate brokerage in Miami's Urban Core. We help our clients build legendary neighborhoods. | Gridline Properties is a full-service commercial real estate brokerage firm based in Miami’s urban core. The firm specializes in geographic driven brokerage services that include landlord and tenant representation, strategic real estate planning, and investment sales and dispositions. It is our ongoing pursuit to build a company of ideas, and by way of this notion we set out to create a culture that keeps us current and competitive.