Purchase in b-17

Dear members,

I have been following this forum since long. I must say that they are many property gurus especially qayuum sb, imtiaz sb, jdm, isloo whom expertise and research about real estate is commendable.

So my query is that i want to purchase plot in b-17, c-1 block for construction purpose. Being my first investment in real estate i dont know how to check the land from construction perspective although i physically visited plot and didn't find anything unusual. There is a option of soil test but owner of plot will not allow me to conduct that prior to purchase. Please help me in this regard and show me way forward.