Risks in buying unfinished house

[Raki]

Hello Friends ,

Need your help/suggestions in finding risks in buying an unfinished house ?

Description of property
=======================

Owner of the house(G+1) is actually a reseller who got house from first owner as-is
and couldnot complete too because of lack of funds .

Current owner took loan on this property in a co-op bank .
Propety is having A katha and katha is on current owner's name
In EC property is registered as purchase of home .

Flooring,bathrooms,electrical work,wood work and front elevation are pending .

Looks like house is left unfinished from nearly 2 years .
===========================

==> When I asked for approved plan he said it is with bank and
said he will get it before we start legal verification . Also he said
he will get renewed plan after agreement and asked to mention this
sale agreement if required .

==> He is ok to register the sale agreement if I need .

==> What else I need to take care ?

==> Do I need to get any other documents related to BESCOM(owner says there was electricty
meter but is stolen) , BWSSB (as that locality has kaveri water) ?

==> Will there be any other problems for me to finish the house if I buy it as-is ?

Thanks,
Raki