Sixteen contracts were signed last week at $4 million and above, a standard-issue total for the week leading into Labor Day. The top 2 signed contracts were sponsor/developer sales in new condo buildings, both designed by Pritzker Prize-winners and both started marketing in 2013.

The No. 1 contract was PH40 at 50 United Nations Plaza, asking $18.25 million, and developed by Zeckendorf. The condo has 5,893 square feet including 5 bedrooms, 2 staff rooms, and 6.5 bathrooms. A living room, dining room, and library span 63 feet and overlook the East River. The building, designed by Foster+ Partners, has a concierge, fitness center, 75-foot swimming pool, a garage, children’s playroom, and storage.

The No. 2 contract was 43C at 157 West 57th Street, asking $17.5 million, reduced from $19 million, and developed by Extell. The unit has 3,466 square feet including 4 bedrooms and 4.5 bathrooms, and features expansive views of Central Park. The condo building was designed by architect Christian de Portzamparc, with interiors by Thomas Juul-Hansen. The 90-story, 90-unit condo was built above the 5-star Park Hyatt Hotel that has a separate entrance for its 210 rooms. Amenities include a fitness center, pool, private dining, a library lounge, a performance space, and a garage.