"Colbyt" wrote in message
...

"Jim B" wrote in message
...

If I engage contractors or builder to rebuilding and enlarge
a house, what will be the percentage for labor and building
material?

The reason why I ask the question, is how much can I save
if I do some of the manageable work myself, like installing
windows, doors, gutters, sidings, internal drywalls, piping
and etc.

Tough to answer. As an example, windows and drywall are very different. A
$500 window may cost $50 to install, but $500 worth of drywall may cost
$1500 to install. Change that window from $500 to a cheapo at $100 or a
fancy one at $2000 and the cost of installing it may remain the same.

What you want to do is talk to the contractor and tell him what you are
interested in doing. He can give a price on the complete structure, he can
give you a cost broken down for framing, electrical, etc. Some will be very
happy to work with you on that basis.

One hint; Get someone to do the drywall. The pro can do the job quickly
and much easier that you can handle the big sheets. Money well spent.
--
Ed
http://pages.cthome.net/edhome/