Once again, the dog days of August impacted the luxury market last week, as only 10 contracts were signed at $4 million and above. The total volume: a modest $78,565,000.

Stat Geek Alert: Last week marked the first time since July 1, when New York hiked the mansion tax, that a property went to contract asking over $20 million. Since then, only 3 contracts have been signed at asking prices above $10 million—and all were townhouses.

The No. 1 contract was a townhouse at 807 Park Avenue, asking $26.5 million, reduced from $39 million. This 25-foot-wide house has 12 stories, and is approximately 24,000 square feet. In 2004, it was sold by Sean “P. Diddy” Combs to developers for $14.3 million. The house was divided into 3 apartments, each with 4 floors. It has been on and off the market for more than a decade, marketed variously as a condo and a mega-mansion. Annual real estate taxes are $268,268.

The No. 2 contract was 29A at 181 East 65th Street, asking $8.5 million. It sold within days of listing to a buyer who lives in the building. The condo has 2,940 square feet including 4 bedrooms and 4 bathrooms. It has 10-foot ceilings and views of Central Park from the living room and master bedroom. The owner purchased the unit for $7.2 million in January 2007. The building is known as the Chatham Condominium, and was designed by architect Robert A.M. Stern in 2000. Amenities include a doorman, fitness center, and garage.