If they are separate titles under different names, it is not possible as separate plans are required to be submitted to authority for each unit. The reason is because one side can't sign on the plan for the other side and vice versa. Separate files = authority looking at it as separate unit of houses. Each house will be required to be functional by itself. Your taking out staircase on one side already make it non functional and in separate files submission you can't remove the shared structure/party wall.

If they are separate titles under the same name or names, it is possible and subject to the authority.
If both is amalgamated into 1 title, it is confirmed possible.

This post has been edited by Phyarc: Apr 14 2022, 11:19 PM

Can be done, but need the mutual agreement between 2 owners for the share allocation.. it also depends on the land size per portion to determine the share in percentage. And yes, during amalgamation applicstion they may reject it, since they would follow latest ruling of foreigner not entitled to own landed property in Selangor.

Regarding your application to remain as 2 separate lots but to combine as single unit, no harm to ask the authority for special consideration if you have consent letter from adjoining lot (yours to wife's and vice versa). Usually authority follow the book meaning they would reject your case and you can have better chance by going top down in their organisation for such special case.