6700 SF Office Building For Sale or Lease. This is a great opportunity to own a small office building in the St. Louis Metro. Priced well below replacement cost at $81.94 psf and 13.08% Proforma Cap Rate!!!! Currently used as a multi-tenant owner-user office with the property owner occupying the 1st floor. Owner would stay occupying a smaller office on the 2nd floor or vacate. High tenant finish on the first floor. Some offices with decks and patio