Manhattan’s luxury housing market slowed last week, with just 12 contracts signed for $4 million or more, according to Olshan Realty’s report on Monday. That’s seven deals fewer than the week prior.

A very long renovation may have been worth the wait. The townhouse at 144 E. 65th St., which was the longtime home of the late David Rockefeller but has been a construction zone in recent years, has ...