Happy birthday ! I was excited when I turned 17 on the 17 th of March haha . So many years ago , now well not really , I ' m not that old <| sep |> I love building in all of the Sims games . Actually I do miss building in Sims 3 , it was my favourite thing to do in that game . I think it depends on what you like to build and how you like to play after a lot gets built . Do you move your sims in and play , do you share them or do you like custom content , and do you like to take pretty screenshots ? For sims gameplay Toss up TS 3 TS 4 depending on which game you like better . TS 3 has an edge up for open world , but this shouldn ' t affect your lot building . TS 4 only has open neighbourhood . Custom content I ' ve seen a lot of nice TS 4 houses and screens , however , custom content goes to TS 3 . You get a lot of options and can make your lots and scenery as cartoony and as realistic as you like . Aesthetics Good or bad you ' re kind of stuck on one TS 4 style , which I personally love . That is an aesthetic preference , but there are still more options in TS 3 . Sharing lots Gallery is super simple and doesn ' t require you to leave your game to add a lot to your game . Building itself Most others have covered it here , but honestly , as much as I miss CAST in TS 3 . and foundations . and different roofs . and garages and apartments . ahem . the new features in TS 4 building is underrated moving the building around the lot , different wall heights , wall friezes and mouldings , windows and wall art that you can move up and down , pressing alt to place objects off the grid , more countertop options that you can get pretty creative with . Here ' s the same lot I built in Sims 3 and Sims 4 for comparison And this is slightly unfair because the Sims 4 screen was taken on my laptop with medium settings , but except for missing some texture details and shadows , it ' s pretty accurate .