Some large, phased projects have really long design and construction schedules, so it can take quite a while to guide them through the LEED certification process. One such project began for us in 2012, the 255 S. King Street Hotel and Office towers, which were constructed on a joint four story podium containing parking and pedestrian level retail space. Phase 1 began with a 325,000SF hotel project that consisted of 297 rooms with a conference center and a health club with a pool. During construction, a popular local restaurant, 13 Coins, relocated to the ground floor of the new building.
Connected by an atrium, the second phase of the project added an 18 story, 292,000SF core and shell office tower to the podium. The office tower houses Avilara on several of the floors with some space yet to lease and contains a large roof top restaurant.
Since the towers share amenities provided in the podium floors, the LEED process undertook a master site approach with each tower being a separate LEED rating system project. The Phase 2 office tower was speculative long past the design process and well into construction of the Phase 1 hotel. This uncertainty created a significant challenge for the design and energy modeling of the conjoined building energy systems. ArchEcology spent a considerable amount of time and effort determining how to separately model each project given the complexity of the interdependent systems.
Finally in December of 2018 after six years in process, both projects successfully received LEED Silver certification.