pbuilder
http://www.netfort.gr.jp/~dancer/software/pbuilder.html.en
pbuilder is meant to simulate how a package would be built by the buildd processes after a package is uploaded to Debian
let's get stated
use visudo as root to add a like like:
<your_linux_user> ALL = /usr/sbin/pbuilder to allow sudo execution of pbuilder by your Linux user