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

Administration & Preconstruction

Listings
Offers procurement and contract administration services for construction projects, developing corporate policy, and procedural manuals.
http://www.caservices2.com/
Plans and specifications for bidding on construction projects online. Services for contractors, subcontractors, construction managers, and more.
http://www.constructionbidding.com/
Specifications and contract documents refer to standards for roofing, plumbing, paint, ceilings, and other trades.
http://www.facilityspec.com/