Real Estate in Garnavillo, IA Portzen Construction205 S Main StGarnavillo, IA, 520495632523719BuildersConstruction CompaniesGeneral ContractorsPlumbersReal EstateSci Construction Wille Donald & Leo Construction25094 Great River Rd Ste 1Garnavillo, IA, 520495632522034BuildersBuilding ContractorsReal Estate Show MoreSee AlsoApartments