Boiler replacement cost in Saint Paul

A residential boiler replacement commonly plans around $7,000 to $15,000 in the Twin Cities as of September 2026. The spread reflects boiler output, number of zones, near-boiler piping, pumps, controls, venting, water treatment, access, and whether radiators or baseboards need work. Ask for a heat-loss basis and a description of the piping changes. A boiler is part of a hydronic system, so the cheapest equipment swap may not deliver the best balance or efficiency.