Ellis Bottom Line Bookkeeping, LLC Share: Accounting/Bookkeeping Visit Website Request Info 729 Main Street Longmont, CO 80501 720-494-2552 303-682-2553 (fax) www.ellisblb.com About Map About Downtown Longmont family-owned bookkeeping firm specializing in bookkeeping, payroll and tax preparation services. What's Nearby? Distance: 5 10 15 20 25 50 mi.