Cost to Install a Tankless Gas Water Heater

February 2023

Tankless Gas Water Heater Installation CalculatorZip Code
Heaters
Item detailsQtyLow  High
Gas Water Heater Cost 
Non-discounted retail pricing for: 8.5 gpm tankless gas water heater at 35F temperature rise. 0.92 energy factor. Digital controller. Requires natural gas supply and 3" vent connection at unit. 5 yr limited warranty.		1 heater$1,557.56$1,751.03
Tankless Gas Water Heater Installation Labor, Basic 
Basic labor to install tankless gas water heater with favorable site conditions. Mount and secure new unit. Upgrade vent ducting. Upgrade gas connection to 200K BTU. Route and connect gas and water from existing supply lines. Leak and cycle test. Includes planning, equipment and material acquisition, area preparation and protection, setup and cleanup.		1 heater$1,557.56$1,751.03
Tankless Gas Water Heater Installation Job Supplies 
Cost of related materials and supplies typically required to install tankless gas water heater including: connectors, fittings and mounting hardware.		1 heater$1,557.56$1,751.03
Tankless Gas Water Heater Installation Equipment Allowance
Job related costs of specialty equipment used for job quality and efficiency, including: Pipe cutting and threading, tubing cutter, brazing kit and pipe wrenches. Daily rental. Consumables extra.		1 heater$1,557.56$1,751.03
Option: Remove Water Heater
Detach and turn off connections. Drain unit. Remove from premises. Disposal costs/fees not included.		1 heater$1,557.56$1,751.03
Gas Water Heater Debris Disposal
Costs to load and haul away old materials, installation waste and associated debris.		1 heater35.437540.3125
 Unused Minimum Labor
Balance of 2 hr(s) minimum labor charge that can be applied to other tasks.		   
Totals - Cost To Install Tankless Gas Water Heater   
Average Cost per Heater  
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For a basic project in zip code 47474 with 1 heater, the cost to Install a Tankless Gas Water Heater starts at $3,063 - $3,584 per heater. Actual costs will depend on job size, conditions, and options.

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Unit Costs: How Pros Price

Unlike other websites that publish pricing from unrelated jobs in the past, Homewyse creates up-to-date estimates from current Unit Costs. The Unit Cost method delivers high accuracy by using location, details and options for the unique requirements of each job. Contracting, trade, design and maintenance businesses rely on the Unit Cost method for transparency, accuracy and fair profits.


Cost to Install a Tankless Gas Water Heater - Notes and General Information

These estimates are for BASIC work performed in serviceable conditions by qualified trade professionals using MID GRADE materials. Work not mentioned on this page and/or work using master craftsman, premium materials and project supervision will result in HIGHER COSTS! Explore the full range of gas tankless water heater new installation labor options and material prices here.

These estimates are NOT substitutes for written quotes from trade professionals. Homewyse strongly recommends that you contact reputable professionals for accurate assessments of work required and costs for your project - before making any decisions or commitments.

The cost estimate includes:

  • Costs for local material / equipment delivery to and service provider transportation to and from the job site.
  • Costs to prepare the worksite for Tankless Gas Water Heater Installation, including costs to protect existing structure(s), finishes, materials and components.
  • Labor setup time, mobilization time and minimum hourly charges that are commonly included for small Tankless Gas Water Heater Installation jobs.

The cost estimate does NOT include:

  • Costs for removing, relocating, repairing, or modifying existing framing, surfacing, HVAC, electrical, and plumbing systems - or bringing those systems into compliance with current building codes.
  • Costs for testing and remediation of hazardous materials (asbestos, lead, etc.).
  • General contractor overhead and markup for organizing and supervising the Tankless Gas Water Heater Installation. Add 13% to 22% to the total cost above if a general contractor will supervise this project.
  • Sales tax on materials and supplies.
  • Permit or inspection fees (or portion thereof) required by your local building department for your overall project.

References - Tankless Gas Water Heater Installation

Tankless Gas Water Heater Installation Budget Management

Tankless Gas Water Heater Installation Cost Infographic - critical areas of budget risk and savings

This infographic highlights decisions and site issues that can cause large cost variances in the typical Tankless Gas Water Heater Installation budget.


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