Do You Have to Move the Plumbing for a Tub-to-Shower Conversion?
Do you have to move the plumbing for a tub-to-shower conversion? Usually not as much as you fear. In most Colorado Springs bathrooms, the drain shifts a short distance and the supply lines stay put. The tearing-the-whole-floor-open scenario homeowners picture is the exception, not the rule. Knowing the difference up front is what keeps a tub-to-shower conversion from ballooning into a project you didn’t sign up for.
Let’s walk through the real problem, what causes it, and how a clean conversion actually comes together.
The problem: homeowners assume “new shower” means “new plumbing”
When people imagine swapping a tub for a shower, they picture jackhammers, an open concrete slab, and a plumber chasing pipes across the room. That mental image does two things: it inflates the budget in their head, and it makes them put off a project that would genuinely improve their daily life.
Here’s what’s really going on. A standard alcove tub and a shower live in almost the same footprint. A common tub runs about 60 inches long and 30 to 32 inches deep. A shower base built to replace it often lands in that same 60 by 32 opening. The walls framing that space usually stay exactly where they are. So the “new plumbing” worry is mostly about one thing: the drain.
If you’re weighing this against a bigger project, our full bathroom remodels page lays out where a focused conversion ends and a full renovation begins.
The diagnosis: it’s the drain location, not the whole system
A bathtub drains at one end, tight against the wall. A shower drains from the center of its base, or wherever the base is molded to drain. That gap between the old tub drain and the new shower drain is the entire “moving the plumbing” question in most conversions.
Why the drain has to shift
The distance is often modest. If your tub drained at the far end and your new shower base drains dead center, that’s roughly 24 to 30 inches of relocation. In a home with a crawl space or an accessible basement below, a plumber reaches the drain from underneath, cuts in the new position, and reties it to the existing trap and stack. No slab work at all.
When it gets more involved
The harder case is a slab-on-grade bathroom, common in newer Colorado Springs and El Paso County builds. Here the drain runs through concrete. Relocating it means cutting a channel in the slab, moving the line, and patching. That’s real work, but it’s a defined, one-day scope, not an open-ended dig. A good crew scopes it before quoting so the number holds.
The supply side, your hot and cold lines, almost never moves the way the drain does. The valve does change. A tub filler and a shower valve sit at different heights, so the plumber swaps the valve body and adjusts the stub-outs inside the wall. That’s a wall-open task, not a floor-open one.
For a wider look at how a conversion fits into a Colorado Springs bathroom project, see our tub-to-shower conversion overview.
The fix: how a clean conversion actually comes together
Once you know the drain and valve are the moving parts, the sequence makes sense.
First, the tub comes out along with the surround. The plumber confirms the existing drain and trap condition while the wall and floor are open. This is the moment to catch a corroded trap or a slow-draining line, exactly the kind of thing that hides behind a tub for 20 years.
Second, the drain is relocated to match the new base. Third, the shower valve replaces the tub valve. Fourth, the base is set dead level, the walls are waterproofed, and tile or a solid surround goes up. Level matters here more than anywhere else, because a base that’s off by even a little sends water to the wrong corner.
Three real scenarios and what the plumbing looked like
A 1970s ranch off Austin Bluffs, crawl space below. The homeowner wanted a walk-in shower in a 60 by 32 alcove. The drain moved about 26 inches, reached entirely from the crawl space. No slab work, no floor opened in the bathroom itself. The plumbing portion was a fraction of the total project.
A slab-built home in Falcon. Same size alcove, but drain relocation meant cutting the concrete. The crew scored and removed a narrow channel, moved the line, and patched it before the base went in. It added a day and a line item, but because it was scoped up front, there was no change order mid-project.
A guest bath in a Broadmoor-area home. The tub was fine, but the surround leaked. The homeowner assumed a full plumbing overhaul. In reality the drain stayed put, only the valve swapped, and most of the work was waterproofing and tile. The plumbing was the smallest part of the job.
When to act
The best time to plan a conversion is before a leak forces your hand. If your tub surround is failing, your caulk lines never stay clean, or you simply never use the tub, you’re already paying for a fixture you don’t want. A dry, well-planned July project beats an emergency repair after water has gotten behind the wall.
If you’re gathering ideas and pricing, our post on bathroom remodel cost myths clears up where the money actually goes, and our Colorado Springs service area page covers the neighborhoods we work in. For a broader planning walkthrough, start with our bathroom remodel guide.
Frequently Asked Questions
Does a tub-to-shower conversion always require moving the drain?
Not always. If your new shower base is designed to drain near where the old tub drained, the line may barely move. Most conversions do shift the drain some distance because tubs drain at one end and showers drain toward the center, but “some distance” is often two feet or less, not a whole new run.
Will the walls have to come out?
The wall around the tub does get opened during a conversion, because that’s how the plumber reaches the valve and how new waterproofing goes in behind the tile or surround. But the framing itself usually stays. You’re opening a wall, not rebuilding the room.
How do I know if my bathroom is on a slab or has a crawl space below?
If your home has a basement or a crawl space, a plumber can often check the drain from underneath. Slab-on-grade homes, common in newer builds around El Paso County, have plumbing set in concrete, which changes how the drain gets relocated. We confirm this during a free in-home consult so the quote reflects your actual house, not a guess.
Wondering what a conversion would take in your specific bathroom? Call Springs Bath Remodel for a free in-home design consult, and we’ll tell you exactly what has to move and what doesn’t before you commit to anything.