Our genius-plumbers are licensed to mount a range of Water Heater systems, from different brand names to residential or commercial. Setting up a water heater costs $703 and $1,750+, or an average of $1,000+, consisting of the unit and labor. Tankless heating units cost concerning $900 to $3,500. Water heaters cost $350 to $3,000+ for the unit alone while plumbing labor runs $40 to $200 per hr. The National Standard is $1,150. The normal Range: $700 - $1,680. Low End - High End: $337 - $9,890.