Located at the north end of Folsom’s historic Sutter Street, this empty lot presented complex challenges. Soil conditions required a soil-nail retaining wall with waterproofing to stabilize the slope and support the old street running at the site’s highest elevation. The retaining wall was extended and used to enclose the two-level subterranean parking garage. From the exterior, the wall makes the five-story building appear as though it rests on a granite base, helping the building’s Gold Rush-era design blend into the historic district’s character. A.P. Thomas Construction, Inc. also applied value engineering to the project, which allowed the original four-story space to house an additional floor.