In some photos, the 47-year-old English filmmaker wore a white tracksuit and shoes.
Ritchie was seen entering the front door.
He reportedly emerged some time later. Rocco was seen in the doorway of the house, hinting he was already at his mother's and would stay there for the night, reported Ace Showbiz.
Ritchie was cycling the relatively short distance to his ex-wife's home.
Madonna's reunion with Rocco came after the exes got warned by a High Court judge that they could ruin what is left of their son's childhood if they failed to settle their bitter custody battle.