Hart Building is an adaptive reuse project on the historic Film Row (once occupied by a range of major film production studios from 1907 until the 1980s) near downtown Oklahoma City. The existing building fabric of a collection of warehouse buildings – the former home of the Hart Industrial Supply Company – is restored and combined with new elements to create a truly mixed-use workplace. Flipping the building’s front from the north to the south reorients the original entrance sequence to connect to the new landscaped parking lot and engage an old, forgotten alleyway. The new layout accommodates a pinwheel of activity arranged around an internal street that is both circulation and social core with public spaces and shared amenities coming off it. The building includes 40,000 square feet of Class A office space, of which AHMM’s own OKC HQ is a part. A new double-height, glazed atrium brings light deep into the centre of the plan, while an inserted bridge simplifies upper level circulation, and, in so doing, creates both spectacle and opportunities for chance encounter.