Builder4.com provide links to websites related to builders, contractors, consulting, architecture, appraisal consultants, architectural consultants, engineering and more.

Bidding

Listings
Provides construction information, advertising, material locations, new company exposer, landfill locations and bid results.
http://www.westernstarupdate.com/
Information source for commercial construction in New Hampshire, Vermont and Maine.
http://www.constructionsummary.com/
Internet marketplace for viewing, downloading, and printing password-protected plans and specifications of construction projects nationwide.
http://www.constructionbidding.com/
Database of civil projects. Includes RFPs and RFQs for finding contracts. Registration required.
http://www.civilprojects.com/