Basic
$9,733 – $23,358 per project
Gas cast-iron boiler around 85% AFUE with copper fin-tube baseboard, two zones with zone valves, expansion tank and circulator, filled and purged
Whole-house hydronic heat: new boiler plus baseboard or radiators for a typical 1,500-2,500 sq ft home, installed.
Install Hydronic Heating System in Seattle, Washington typically costs $11,450 to $27,480 per project as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Prices in Seattle are 19.0% higher than the national average for install hydronic heating system.
National average: $10,000 – $24,000 per project
$9,733 – $23,358 per project
Gas cast-iron boiler around 85% AFUE with copper fin-tube baseboard, two zones with zone valves, expansion tank and circulator, filled and purged
$11,450 – $27,480 per project
Condensing gas boiler around 92% AFUE with copper fin-tube baseboard, two zones with zone valves and thermostats, filled and purged
$14,313 – $34,350 per project
Modulating-condensing gas boiler around 95% AFUE with outdoor reset, high-output fin-tube baseboard, two circulator zones, smart thermostats
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $4,680 – $11,232 | job |
| Labor | labor | $4,690 – $11,256 | job |
| Supplies & Other | supplies | $1,248 – $2,995 | job |
| Equipment & Disposal | equipment | $832 – $1,997 | job |
Labor costs in Seattle run proportionally higher than materials, which may favor material-heavy solutions.
Connect with local install hydronic heating system contractors in Seattle for personalized quotes based on your specific project.