All - In order to get the best and latest costs, you will need to contact several contractors who build only specialized commercial buildings (not your run-of-the-mill office building.) Then contact several architectural firms that have designed buildings with requirements similiar to what a museum would need. Don't take up a lot of their time. Just tell them you are doing a preliminary needs assessment & only need a "ballpark" figure. This will save you a lot of time & frustration. Hope this helps. Gerri Green Development Officer Mesa Southwest Museum ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).