Dreaming of running on a treadmill outside a stranger's house can symbolize a few different things. Treadmills often represent a sense of routine or being in a cycle where you are exerting energy but not necessarily making progress. This could suggest you feel stuck in a situation in your waking life, perhaps related to your goals or ambitions.
The setting outside a stranger's house may indicate feelings of unfamiliarity or insecurity about your current path. It might suggest that you are trying to find your place or identity in a new environment or situation that feels foreign to you.
Consider reflecting on areas in your life where you feel you are working hard but not seeing results. Are there situations where you feel out of place or uncertain about your direction? This dream could be prompting you to assess your current efforts and consider whether they align with your true desires and goals.