Water Heater Installation in Gaithersburg, MD

Standard 40–50 gallon tank water heater installation costs $800–$2,500 including the unit and labor. Tankless water heater installation runs $1,500–$4,000. Heat pump water heaters cost $1,200–$3,500 installed. Costs vary by city and local permit requirements.

Replacing a like-for-like tank water heater typically takes 2–3 hours. Switching from tank to tankless requires additional gas line or electrical work and can take a full day.

In most U.S. jurisdictions, yes. Water heater replacement requires a plumbing permit and inspection. A licensed plumber will pull the permit as part of the job. Unpermitted work can void homeowner insurance and cause problems at resale.

Tank water heaters last 8–12 years. Tankless units last 15–20 years with proper maintenance. If your unit is over 10 years old and needing repairs, replacement is usually the better investment.

Browse the 7 licensed plumbers listed above for Gaithersburg, MD. Each listing includes a direct phone number — call directly without filling out a form or submitting a lead. Look for plumbers with verified ratings and reviews.