Thinking about moving your shower to a new spot or updating your bathroom layout? You’re not alone—but how difficult is it to reroute plumbing in a showerreally depends on several critical factors. Whether you’re a seasoned DIYer or a first-time homeowner, understanding the complexity, cost, and potential pitfalls can save you time, money, and stress. In this guide, we’ll break down everything you need to know—so you can make an informed decision with confidence.
What Does “Rerouting Shower Plumbing” Actually Mean?
Rerouting shower plumbing involves changing the path of water supply lines (hot and cold) and the drainpipe to accommodate a new shower location or updated fixtures. This isn’t just about shifting a showerhead—it often means cutting into walls, floors, or even ceilings to access and redirect pipes safely and up to code.
According to the National Association of Home Builders (NAHB), plumbing modifications account for nearly 25% of unexpected costs in bathroom renovations. That’s why knowing what you’re getting into matters.
How Difficult Is It to Reroute Plumbing in a Shower? (Key Factors)
The difficulty level ranges from moderate to very high, depending on these variables:
1. Home Construction Type
Slab foundation homes: Extremely challenging. Pipes run under concrete, requiring jackhammering or rerouting overhead through walls/ceilings.
Raised foundation or basement: Easier access to pipes below, reducing labor and cost.
Multi-story homes: Upper-floor reroutes may require opening ceilings below—adding complexity.
2. Distance of the New Location
Moving the shower just 1–2 feet might only need minor pipe extensions. But relocating across the room could mean:
Running new supply lines from the main manifold
Installing a new P-trap and vent for the drain
Ensuring proper slope (¼ inch per foot) for drainage
3. Existing Pipe Material
Copper or PEX: Flexible and easier to work with (especially PEX).
Galvanized steel: Older, corroded pipes may need full replacement—increasing scope and cost.
💡 Pro Tip: The Uniform Plumbing Code (UPC) requires all new plumbing work to meet current standards—even if your existing system is grandfathered in.
Clean and white bathroom with amenities.
Step-by-Step: What’s Involved in Rerouting Shower Plumbing?
Here’s a realistic breakdown of the process (best performed by a licensed plumber unless you have advanced skills):
Step 1: Shut Off Water & Drain Lines
Turn off the main water supply and open faucets to relieve pressure. Drain remaining water from pipes.
Step 2: Access Existing Plumbing
Open drywall or flooring to expose current supply and drain lines. Use a stud finder and utility scanner to avoid electrical wires.
Step 3: Plan the New Route
Maintain proper venting (within 5 feet of the trap, per UPC)
Ensure drain slope: ¼ inch per horizontal foot
Keep hot/cold supply lines parallel and insulated if in unconditioned space
Step 4: Install New Pipes
Use ½-inch PEX for supply lines (standard for showers)
Install a new 2-inch PVC drainpipe with correct pitch
Connect to existing stack or install new vent if needed
Step 5: Pressure Test & Inspect
Plumbers typically perform a 15-minute pressure test at 80 PSI to check for leaks before closing walls. Most municipalities require a plumbing inspection before drywall goes back up.
Step 6: Restore Finishes
Patch drywall, re-tile, and reinstall fixtures. Don’t skip waterproofing—use a membrane like Schluter-Kerdi for wet areas.
📌 Real-World Example: A homeowner in Austin, TX, rerouted their shower 4 feet in a slab home. Total cost: $4,200, including $1,800 for concrete cutting and repouring. Timeframe: 5 days.
DIY vs Hiring a Professional: Which Is Right for You?
Unless you’ve successfully completed similar projects, hiring a pro is strongly recommended. A single leak behind a wall can cause $10,000+ in water damage—far outweighing labor savings.
Undiscovered rot or mold behind walls (adds $500–$2,000)
Outdated electrical near plumbing (requires electrician coordination)
Permit fees: $100–$400 in most U.S. cities
Tile matching: If you’re not redoing the whole bathroom, finding matching tile can be impossible
⚠️ Warning: Skipping permits may void your home insurance if a leak occurs later.
How Much Does It Cost to Reroute Shower Plumbing?
National averages (2025 data from HomeAdvisor and Angi):
Scope
Average Cost
Minor reroute (<2 ft)
$800 – $1,500
Moderate (new wall location)
$2,000 – $3,500
Full relocation (slab home)
$3,500 – $7,000+
Labor typically accounts for 60–70% of the total. Always get 3 written estimates—and verify license numbers via your state’s contractor board.
FAQ Section
Q1: Can I move my shower without rerouting plumbing?
Only if you’re keeping it within the same “plumbing bay” (same wall or directly adjacent). Even then, minor adjustments are usually needed for valve alignment or drain positioning.
Q2: How long does rerouting shower plumbing take?
Most jobs take 1–3 days for pros. DIYers should allow at least a week, factoring in drying time, inspections, and learning curves.
Q3: Do I need a permit to reroute shower plumbing?
Yes, in nearly all U.S. jurisdictions. Permits ensure work meets safety codes and protect you during resale. Unpermitted work can delay home sales or trigger fines.
Q4: Can PEX pipe be used for shower supply lines?
Absolutely. PEX-A or PEX-B is code-approved, freeze-resistant, and easier to install than copper. Just ensure fittings are compatible (e.g., SharkBite or crimp rings).
Q5: What’s the biggest mistake homeowners make?
Assuming “it’s just pipes.” Plumbing affects structural integrity, moisture control, and ventilation. Cutting corners leads to mold, leaks, or failed inspections.
Q6: Will rerouting affect water pressure?
Not if done correctly. However, excessively long runs or undersized pipes (less than ½-inch) can reduce pressure. A plumber will calculate flow rates to prevent this.
Conclusion
So, how difficult is it to reroute plumbing in a shower? It’s not a weekend fix—it’s a precision job that blends engineering, craftsmanship, and code compliance. While the idea of a dream bathroom is exciting, success lies in planning, professional help, and respecting the hidden complexities behind your walls.
If this guide helped clarify your next steps, share it with a friend tackling a bathroom remodel! And don’t forget to pin it on Pinterest or tweet it—your network will thank you.
✅ Final Tip: Always get a fixed-price contract—not hourly—for plumbing reroutes. It protects you from budget creep and ensures accountability.
Your perfect shower starts with smart plumbing—not guesswork.
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