Best Plumbing in Irving, TX — 17 Vetted Contractors

Yes. The City of Irving requires a permit for water heater replacements. Your licensed plumber should pull this permit before starting work — it's included in most reputable contractors' quotes. The permit triggers a city inspection that confirms the installation meets the 2021 IPC with Texas amendments, including the 18-inch elevation requirement for garage installations. If a contractor tells you a permit isn't needed, that's a red flag. Verify permit requirements directly with Irving Development Services at cityofirving.org.

The most reliable early indicator is an unexplained increase in your water bill — even $20–$40/month above your baseline warrants investigation. Other signs: warm or damp spots on the floor, the sound of running water when all fixtures are off, or cracks appearing in interior walls or flooring. Irving's expansive clay soil makes slab leaks more common here than in many other Texas cities. A licensed plumber can perform electronic leak detection ($300–$600) to pinpoint the location before any repair work begins. Don't wait — a slow slab leak can undermine your foundation.

Go to tsbpe.texas.gov and use the license lookup tool — it takes under a minute. Enter the plumber's name or license number and confirm their license is active and in good standing. Texas requires all compensated plumbing work to be performed by a TSBPE-licensed Master or Journeyman Plumber. This is a state-level requirement, not city-specific, so it applies to every plumber working in Irving. Never skip this step, even for small jobs.

Yes, meaningfully so. Irving's water supply comes through the Dallas Water Utilities system, which draws from surface reservoirs. DFW water hardness typically runs 150–250 mg/L — classified as moderately to very hard. Over time, this accelerates scale buildup inside water heaters (reducing efficiency and lifespan), clogs aerators and showerheads, and degrades appliance components. If your water heater is under 10 years old and already showing efficiency drops, hard water scale is a likely culprit. A whole-house water softener ($800–$2,500 installed in the Irving market) is a legitimate long-term investment here.

It varies more than almost any other plumbing repair, which is why getting multiple quotes is essential. Electronic detection alone runs $300–$600. Repair options include tunneling under the slab ($3,000–$8,000+ depending on depth and access), epoxy pipe lining for certain pipe types ($2,000–$5,000), or rerouting the line through the attic or walls ($1,500–$4,000). The right method depends on the pipe material, leak location, and your home's layout. Any contractor who quotes a slab leak repair without first doing detection and a camera inspection is guessing.

May is the start of peak season in DFW, so response times are stretching. For true emergencies (active flooding, no water to the house), most Irving plumbers can respond same-day or within a few hours. For non-emergency scheduled work, expect 2–5 business days for the earliest available slot with reputable contractors. If you're getting quotes for planned work, book early in the week. Demand typically peaks July–August, so if your project can wait until fall, you'll likely get faster scheduling and more competitive pricing.

Possibly, yes — and it depends on what's in the walls. Homes built between 1978 and 1995 in Irving may have polybutylene supply lines (gray plastic pipe, sometimes labeled 'PB' or 'Quest'), which have a documented failure rate and should be replaced. Homes from this era also frequently have cast-iron drain lines under the slab that corrode from the inside. A plumber with a camera can inspect your drain lines ($150–$300) and give you a condition assessment. If you're buying a pre-1990 Irving home, make this part of your due diligence before closing.

Minor repairs — replacing a faucet, swapping a toilet flapper, installing a new showerhead — are generally fine for a capable DIYer and don't require a permit. Anything involving the water supply lines, drain lines, water heater, or any work that opens walls or touches the slab requires a licensed plumber and typically a permit under Irving's code. Unpermitted work can create problems when you sell the home and may void your homeowner's insurance coverage for related damage. The TSBPE enforces this at the state level, not just locally.