Re: Placing walls extremely laggy after new patch
@beccas24 Please test in a clean user data folder. Move your entire Sims 4 folder out of Documents\Electronic Arts and onto your desktop, and when you launch the game, a clean folder will spawn with no content. Don't add anything to it yet; just see whether the lag is still there.
If you get lag in a clean folder, try bringing up the Options menu (the three dots in the upper right corner of your screen). That seems to get rid of Build mode lag for some people, some of the time. It's not really a solution, just useful to know whether it works for you too.
It would also be helpful to see a dxdiag on this computer. You can attach one to a post here.
https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/