I was all set to tell you to have a look at ImproveNet's website and their Project Tools page ( http://www.improvenet.com/projecttools/index.html ) for an easy, zip code based estimator, but they don't have an online estimator or project calculators for electrical work. I know they use zip codes if you submit a request for a referral on their 'Find a Contractor' link on their Services page( http://www.improvenet.com/services/index.html ) and I assume the referral info comes back with a ballpark estimate based on the project description. I wonder why they don't include electrical estimates though.