I am unable to get the alchemy lab for my whiterun house but it lets me pay the 500 gold. Is anyone else experiencing problems like this and is it a caused buy the new patch or DLC.

Its the dlc this worked for me

UESP:With the recent installation of the Dawnguard DLC, Players may encounter a bug when purchasing Decor for Breezehome from Proventus Avenicci. After initially purchasing the Alchemy Room it will not disappear from the list of Available Decor, It will remain constantly available for purchase and will not appear in Breezehome. One way to fix this issue is to temporarily uninstall the Dawnguard DLC, make the purchases then re-install the Dawnguard DLC