National Office Center is a 32,000 SF two story office building located in the heart of Collin County on SH 121. This is an amazing location with frontage on SH 121 and signage facing 121. Units are available from 3,000 - 32,000 SF. Each floor is 16,000 SF. Our Phase 1 building is sold out and completed. Construction on Phase 2 is planned for January 1, 2023 and will deliver Feb. 2024. Call today for more details or to reserve your space.