We invite Houston tenants to list available sublease space. Search available sublease spaces in Houston.View property photos, floorplans, pricing details and more. 520 Post Oak, Houston, TX is a Class "A" office building in Post Oak Park, with a heavily wooded, park-like setting adjacent to the Galleria area. A sublease is an agreement where someone takes over part or all of an existing lease. This type of lease involves at least three parties. Get details and reviews regarding a particular Houston accommodation. Post listings for sub-lease. We can help you lease excess space in Houston office buildings, Houston commercial real estate, and Houston commercial property. Texas Medical Center Sublease Available, ±10,000 SF can be divided.