CDA property tax tariff on residential buildings in Islamabad sectors

I will be very thankful if somebody provides me information about CDA property tax tariff on residential buildings in Islamabad sectors. Moreover, is there any kind of property tax on residential buildings which are build on 25x40 or 25x50 sized plots in G-13 or I-10 sectors.

By: JAHANGIR AHMED
umer_jah@yahoo.com