Richardson TX bathroom remodel permit rules
Richardson's building department processes permits via cor.net. The permit trigger is system modification — relocated plumbing, new or extended circuits, structural changes. Cosmetic work at existing rough-ins requires no permit. Call (972) 744-4000. Texas requires TSBPE-licensed plumbers (tsbpe.texas.gov) for plumbing permits and TDLR TECL-licensed electricians (tdlr.texas.gov) for electrical permits. Texas has no state GC license and no Section 1101.4 equivalent.
Texas has no state GC license requirement — any contractor can manage residential projects. TSBPE-licensed plumbers and TDLR TECL-licensed electricians are required for permitted trade work. DFW sits on Blackland Prairie expansive clay soil that swells when wet and shrinks when dry, causing slab movement. All DFW homes are slab-on-grade — no basements. Oncor is the TDU (Transmission and Distribution Utility) in ERCOT's deregulated market for most of the DFW metro; homeowners choose their retail electricity provider. Atmos Energy serves natural gas.
Richardson is a mature telecom and tech-industry suburb — most of its housing was built between 1960 and 1990, meaning panel capacity should be assessed before adding EV or heat pump circuits.
Every Richardson bathroom sits on a concrete slab foundation — there is no basement or crawl space below. All drain lines run under the slab. Moving any drain connection requires sawcutting through the concrete, excavating below, rerouting the plumbing, and repouring. A TSBPE plumber's assessment of the most efficient slab routing before the layout is finalised saves money. Budget $2,000–$4,500 for the slab break portion of any drain relocation.
Three Richardson bathroom scenarios
| Factor | What it means for your project |
|---|---|
| Slab-on-grade universal | Every drain move = slab break. $2,000–$4,500 per point. No basements in Richardson. |
| TSBPE + TECL licenses | Texas licensed plumber and electrician required. No TX GC license. |
| No TX Section 1101.4 | No mandatory fixture upgrade triggered by plumbing permit. |
| Oncor TDU (ERCOT) | Oncor is the TDU for Richardson (ERCOT deregulated). Atmos E... |
| Atmos Energy gas | 1-888-286-6700. Gas line check before any gas fixture changes. |
Phone: (972) 744-4000 | cor.net
TX Plumber license (TSBPE): tsbpe.texas.gov
TX Electrician license (TDLR TECL): tdlr.texas.gov
Oncor Electric (TDU): 1-888-313-4747 | oncor.com
Atmos Energy (gas): 1-888-286-6700 | atmosenergy.com
Common questions about Richardson bathroom remodel permits
Why is moving plumbing expensive in Richardson TX?
All homes are slab-on-grade — every drain relocation requires a slab break. Budget $2,000–$4,500 for the concrete work per drain change point.
Does Richardson TX have a Section 1101.4 fixture upgrade rule?
No. Texas has no equivalent. Apply via cor.net.
Information based on Richardson official sources and applicable state/local building codes as of April 2026. Codes and fees change — verify current requirements before starting work. For a project-specific report, use our permit research tool.