Best Plumbing in Lewisville, TX — 7 Vetted Contractors

Yes. The City of Lewisville requires a plumbing permit for water heater replacements. Your licensed plumber should pull this permit before starting work — if they suggest skipping it to save money or time, walk away. The permit triggers an inspection that protects you if you ever sell the home or file an insurance claim. Permit fees in Lewisville are typically $50–$100 for a standard water heater swap. Confirm current fees with the City of Lewisville Development Services department.

The most common signs are: a water bill that spikes without explanation, the sound of running water when all fixtures are off, warm or damp spots on your floor (especially on a concrete slab), or low water pressure in one area of the house. Lewisville's expansive clay soil makes slab leaks more common here than in many other parts of the country. Don't ignore these signs — a small slab leak can erode your foundation over time. Call a plumber who offers leak detection services (acoustic or thermal imaging) before authorizing any concrete work.

Yes, Lewisville's municipal water supply — sourced primarily from Lewisville Lake and treated by the City of Lewisville Water Utilities — is considered hard, typically ranging from 150–250 mg/L as calcium carbonate. Hard water accelerates scale buildup inside water heaters, reduces the efficiency of appliances, and shortens the life of fixtures and valves. A whole-house water softener is a common and worthwhile investment for Lewisville homeowners. Installation typically runs $800–$2,200 depending on unit size and complexity.

Use the Texas State Board of Plumbing Examiners (TSBPE) online license lookup at tsbpe.texas.gov. You can search by name or license number. Always ask the plumber for their individual license number — not just the company name — because companies can send unlicensed workers. A valid Texas plumbing license will show as 'Active' in the TSBPE database. This takes under a minute and is the single most important vetting step you can take.

Most licensed plumbers in the Lewisville/DFW area charge a service call or diagnostic fee of $75–$125 to come out and assess the problem. Many apply this fee toward the repair cost if you proceed with them. Be cautious of companies advertising 'free estimates' — they often make up the difference in inflated repair quotes. For after-hours or emergency calls, expect a premium of $50–$150 on top of the standard service fee. Always confirm the fee structure before they arrive.

Possibly. Homes built in Lewisville between roughly 1978 and 1995 may have polybutylene (PB) supply lines — a gray plastic pipe that was widely used and later found to be prone to failure and leaks. PB was discontinued in the mid-1990s. If your home hasn't been repiped and you're in that vintage range, ask a licensed plumber to inspect. A full repipe to PEX typically costs $4,000–$12,000 depending on home size, but it eliminates a significant failure risk. Some homeowner insurance policies also exclude coverage for PB pipe failures.

Yes. The City of Lewisville requires annual backflow preventer testing for irrigation systems connected to the municipal water supply, per the city's cross-connection control program. Testing must be performed by a licensed plumber who holds a specific backflow assembly tester certification. Tests typically cost $50–$100 and results must be submitted to the city. If you haven't had yours tested this year, June — before peak summer watering — is the right time to schedule it.

For routine repairs (toilet, faucet, water heater), most established Lewisville plumbers can schedule within 2–5 business days during non-peak periods. In June and July — peak slab leak and water heater season in North Texas — wait times can stretch to 1–2 weeks for non-emergency work. Emergency services (burst pipe, active flooding) are typically same-day but carry after-hours premiums. If your issue isn't urgent, booking early in the week tends to get faster slots than calling Friday afternoon.