Ben Affleck has purchased a new multi-million dollar L.A. estate, TMZ has learned, all but marking the end of his marriage to Jennifer Lopez.

Real estate sources tell TMZ … Ben just closed escrow on the Pacific Palisades mansion for $20.5 million. The stunning residence has 5 beds and 6 baths with breakfast and dining areas, a separate family room, den, walk-in closets, media room, powder room, guest house and on and on and on.