You will see your Sim either under PlayedorUnplayed Households.
If you want your Sim to move into a home intheNeighborhood, pick 'Manage Households' at the top right cornerinthe map view. As you can see on the picture below, the House is toobig for the Lot, but you're still able to move itaround, rotate and place it. To startplayingwith this feature, open the Move Lot & Housesection (icon with 4 arrows) and select Move Lot.
The new Update now allows you to moveyour entire Lot (not just the House).