I have often said that the ideal “rowhouse” is one between two famielies with young children.
Make sure your windows are really well-insulated and turn down your thermostat. Let their heat percolate through your walls.
Must be an extended family.
I had an apartment once that was between two others, had one behind it, and was under one, so my heating/cooling bills were negligible.
I have a tendency to drop the thermostat in the winter, and bundle up, then raise the thernostat in the summer and strip off as much as possible. Until I get chillled....