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Texas Contractor NetworkThe Texas trades directory
How-To & Guides 8 min read • Apr 28, 2026

Master Bathroom Remodeling Checklist: Plumbing Rough-Ins, Tile & City Permits

Step-by-step master bathroom renovation checklist for Texas homeowners and contractors, covering permits, framing adjustments, dual vanities, exhaust ventilation, and inspection phases.

A master bathroom remodel involves more trades per square foot than almost any other home improvement project. Following an orderly phase-by-phase checklist prevents costly rework, failed municipal inspections, and hidden moisture damage.

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Phase 1: Preconstruction & Permitting

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  • Confirm layout drawings with precise centerline dimensions for plumbing rough-ins (dual vanity sinks, toilet flange clearance, shower valve).
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  • Submit permit applications to the local city building department (plumbing permit for valve/drain work, electrical permit for lighting/GFCI circuits).
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  • Order long-lead specialty items early (freestanding soaking tub, thermostatic shower valves, custom vanity, custom tile).
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Phase 2: Demolition & Rough Mechanicals

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  • Inspect subfloor and framing for water rot or termite damage around the old toilet and tub.
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  • Upsize shower drain to 2-inch PVC with proper slope to main stack.
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  • Install dedicated 20-amp electrical circuits for vanity receptacles and heated towel bars.
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  • Install blocking in wall studs for shower grab bars, heavy glass hinges, and vanity hanging cleats.
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Phase 3: Waterproofing & Inspections

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  • Pass city rough plumbing and electrical inspections before closing wall cavities.
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  • Install cementitious backer unit (CBU) or waterproof foam board with sealed seams.
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  • Execute a mandatory 24-hour shower pan flood test to verify leak-free pan integrity.
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Frequently Asked Questions

What trades are required for a complete master bathroom remodel?

A full gut remodel typically requires a licensed plumber, a licensed electrician, a tile setter/waterproofer, a drywall finisher/painter, a custom glass installer, and a countertop fabricator, managed by a licensed general contractor.

How many CFM does a master bathroom exhaust fan need in Texas?

Building codes require 1 CFM per square foot of bathroom area for rooms under 100 sq ft. For larger master baths with enclosed toilet rooms or luxury showers, 100 to 150 CFM with an exterior roof or soffit discharge is recommended to combat Texas humidity.

What is a shower pan flood test?

A flood test involves plugging the shower drain and filling the waterproof pan with water up to the top of the curb (at least 2 inches deep) for 24 hours to prove zero leakage before any tile is laid.

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