Do you need a permit to replace a roof in Washington, MO?

City of Washington, Missouri

city

405 Jefferson St, Washington, MO 63090

The City's Building Codes page states that the Building Official reviews building permits and construction "to ensure compliance with the 2021 International Building Code and the 2021 Edition of the International Residential Code for One and Two-Family Dwellings," and lists "2021 International Residential Code for One and Two-Family Dwellings" first among the "Current adopted City Building codes".

Washington's combined sales tax rate is 8.85% (use tax 8.475%), jurisdiction code 77416-071-000, per the Missouri Department of Revenue's Jurisdiction and Total Rate Database for the fourth quarter of 2026. The same table lists 1 smaller rate area inside the city where special taxing districts (ambulance and community improvement districts among them) add tax, at a combined sales rate of 9.6%. Missouri's own state rate is 4.225%; the rest is local. For a re-roof, 12 CSR 10-112.010(1) provides that "a contractor is the final user and consumer of the materials and supplies used and consumed in fulfilling a construction contract and which become part of a completed real property improvement," so the roofer pays tax when it buys the materials. Under 12 CSR 10-112.010(2)(A), "In general, title passes after installation is complete," and where title passes after attachment the contractor "does not collect tax on its transfer of ownership or title of the item."