If you wish to claim insurance and property tax, you are required to limit your employment expenses to the amount of your commission income. 

This link indicates what work-in-home expenses may be claimed by salaried employees.  It specifically excludes home insurance and property taxes.

http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns206-236/229/slry/wrkspc-eng.ht...

This link indicates that you can claim home insurance and property taxes if you are claiming as a commissioned employee.  However remember that the total amount of your employment expenses can not exceed your commission income.

http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns206-236/229/cmmssn/hm-eng.html