The existing facilities of a plumbing corporation are remodeled and vertically enlarged with two stories of office space. The existing ground story is clad in black slate, contrasting with the lighter colored fiber cement board of the addition. Transition from the stone-clad base to the addition is articulated with a continuous steel channel. Perforated aluminum awnings on the south-facing street façade are utilized to control light and heat gain during warm months. North-facing spaces open onto a large terrace with views of the Manhattan skyline. The addition was constructed without interrupting facility operations on the existing ground floor. This project received a 2009 Building Brooklyn Award.