Our 501(c)7 is trying to raise money for a building for the membership. Does any fundraising get taxed if used exclusively for the building?

Are you asking whether donors can deduct contributions they made from their taxes? The answer is no - a donation to a social club does not qualify to be deducted. See IRS pub 526 for details:

www.irs.gov/pub/irs-pdf/p526.pdf