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Tankless water heater cost in Dallas: what 186 city permits show

The median declared value for residential tankless water heater installation in Dallas was $6,150. Half of all jobs fell between $4,000 and $8,487.

Tankless jobs are a small slice of the Dallas file, 186 permits against 1,695 for tank heaters, and they are declared at very different values.

The median was $6,150, close to three times the median for a tank heater ($2,200). The permit record does not say whether a job replaced an existing tankless unit or converted a home from a tank.

What stands out

• Half of all tankless jobs were declared between $4,000 and $8,487.
• One job in ten was declared at $12,000 or more.

What this number is, and is not

• It is the job value a contractor declared on a City of Dallas permit application. It is not an invoice, and the city does not audit it.
• It covers work done under a permit inside the city limits. Jobs done without a permit, and jobs in the suburbs, are not in the file.
• It describes the spread of past jobs. It is not a quote for your home.
• How we picked these permits: Plumbing permits whose description names a tankless water heater.

Before you sign

• Put your quote next to the middle-half range above. If it sits outside, ask what is different about your job.
• Ask whether the price includes pulling the city permit, and ask for the permit number.
• Get the scope in writing: the unit's brand and model, whether the gas line and venting are being changed, and whether a condensate drain or electrical outlet is being added.
• Texas licenses plumbers through the Texas State Board of Plumbing Examiners (TSBPE). Search TSBPE licenses.

More Dallas jobs

Source: City of Dallas Building Permits (Dallas OpenData, dataset e7gq-4sah), read November 15, 2026. Values between $150 and $150,000 are counted. Full method.