It's something that always happens to me as well, but it's just how the game was made. For example, In Sims 3 Wii, you cannot build a house, you can furnish a house of your choice but you can't build on it, you can just add walls inside the building you have, and yes- it's very annoying for everyone, but Ots just like pro's and con's (In this case, it being a con) but you can still live happy though! To conclude, I hope this helped and it is a very depressing thing that you can't build- MAJOR SET DOWN! But I guess everyone has to wing life (like the saying 'yolo'- You Only Live Once). I do hope this really helped, as remember guys, keep Simming! ~ThatGirlySimmer <3