。
Last night around 10 I passed by your house.
Literal
Last-night 10-o'clock around you-of house-of side [object-を] pass-[past-った]-[sentence-final-よ].
Note that 通る ('to pass through, pass by') takes を for the path traveled — a quirk of motion verbs in Japanese. そば ('side, nearby') is a common spatial noun. The whole sentence is casual, reporting an observation or a failed visit.