Ghosts on the Loose (1943)

Glimpy's surprisingly beautiful sister gets married to Jack, a young engineer, and will move to a 'bargain' suburban house neither has ever seen. During the honeymoon, Mugs orders the gang to fix up the house for the newlywed but mistakenly pick the 'haunted' house next door, which is occupied by some mysterious and nefarious live men, dodging in and out of secret panels - clearly up to no good.