DFW Plumbing Permit Requirements & Fees by City (2026): Do You Need One?

Decision guide

How to decide what happens next

Start by identifying whether the issue is isolated to one fixture or affects several drains. If the problem is spreading, includes dirty water, or risks property damage, treat it as urgent and request provider guidance.

Checklist

DFW plumbing permit requirements by city: what's actually required

Permit rules, fees, and who's allowed to pull the permit differ by city - verified directly from each city's own official building/plumbing permit documentation.

• Dallas: a permit is required for most plumbing work, and the City's own permitting guide states a permit is always required for water heater and boiler replacement even though some in-kind fixture repairs are exempt. The minimum permit fee is $100.00. A licensed contractor registered with the City can pull it, or a homeowner with a Homestead Exemption Certificate who occupies the dwelling can pull the permit and do the work themselves.
• Fort Worth: permits are priced per fixture or appliance rather than a flat minimum. The City's own Table 1-I fee schedule lists $10.34 for the first fixture or appliance and $4.22 for each additional one, with sewer, water service, gas service, and backflow preventer work each billed as their own separate line item. When a third-party inspector is used instead of a City inspector, the fee is reduced by multiplying the total by 0.35.
• Arlington: plumbing permits carry a flat $100.00 base/trade permit fee under the City's own fee schedule, on top of itemized per-item add-ons for fixtures, water heaters, backflow devices, and gas lines. Skipping the permit is a real risk - Arlington's schedule sets the penalty for unpermitted work equal to the permit fee itself, effectively doubling the cost once it's caught.
• Plano: the City's own permit-required list explicitly names "water heaters (replacing or adding)." The plumbing permit fee is calculated at $0.01 per square foot with a $45.00 minimum, and new single-family construction also carries a separate $75.00 Plumbing Certificate fee.
• Every DFW city not named here still requires its own permit for most non-in-kind plumbing work under the same Texas plumbing code framework - fee amounts and whether a homeowner can legally pull their own permit differ enough even between neighboring cities that assuming one city's rule applies to another is a common, avoidable mistake. Always confirm with your own city's building inspection department before starting work.

Verification

How to confirm what your specific job needs before you start

• Check your city's own published Building Inspection/Permitting fee schedule (linked in each city note above) before assuming a repair is too small to need a permit - Dallas and Plano both explicitly list water heater replacement as requiring one even though it feels like a simple swap.
• If you want to do the work yourself, check whether your city allows a Homestead Exemption-based self-permit the way Dallas does, versus requiring a licensed, City-registered contractor to pull it - this decides whether DIY is even a legal option before cost ever matters.
• Ask whether a third-party inspection option is available and whether it changes your fee - Fort Worth's own schedule applies a 0.35 multiplier discount when a third-party inspector is used instead of a City inspector.
• Budget for the real total, not just the headline minimum - Arlington's and Fort Worth's schedules both layer itemized per-fixture or per-device add-ons on top of (or instead of) a base fee, so a multi-fixture job can cost noticeably more than the quoted minimum alone.