How to dig a borewell in a residential property( villa ) in Manjaly,
ernakulam Distirict, India?

How is a borewell dug ?

With a water well drilling rig? I assume you would hire a contractor
to drill the well for you. Depending on the geology, they would either
use rotary or hammer drill techniques.

This site may give you some idea of the possibilities.

http://www.wn.org/wnstore/PDFs/WNIA/5-1.pdf

I also discovered this one, that seems to indicated that you may need approval:

http://www.elaw.org/resources/text.asp?id=2846 

This site is not from your district, but it suggests that the Ground
Water Department is there to offer technical assistance:

http://malappuram.nic.in/gw.html

Good luck.

I would also be rather careful

- bore holes dug in India have produced water saturated with minerals,
I think it was Aluminium, and they were literally poisonous
- quite a scandal, but to be fair, nobody thought of testing the water
for the un-obvious

Recently, on the radio, I heard about somebody having a well dug in
Nigeria, it was entirely manual and done by two guys in about three
weeks.

This is going to sound odd, but about 20 years ago a Belgian company
wanted a bore hole drilled in the UK, they sent over a farmer for the
day (he did not like to leave his cows over-night) he wandered around
with his stick, told them where to drill and to what depth - and
returned to his farm.

To the delight of the locals, and to the disgust of London
consvervationists, there is a medium sized production plant in the
midst of an area of natural beauty.

Basically, what I am saying is :-

1) Check out the quality of the neighbours wells - it might be poison
2) Check out local well diggers