You would be required to apply for permission to buy a landed
property (house or semi-detached). PR's are considered on a case by case basis, and the gahmen doesn't tell us much about the rules.
However, one can apply a bit of logic and come up with some reasonable conditions for being granted permission.
a) You have been here for quite some time, pay your taxes, and are otherwise a good immigrant.
b) You are running a business and/or if working for a company, you are here for the long term.
c) You've got kids in school, especially if male.
d) You have the salary and finances to support buying and maintaining a landed property.
e) You are using the property for personal use and not for rent or investment.