Cost to Bathroom Plumbing Rough-In in St. Louis, MO

$2,200–$7,040 in St. Louis

12% below the national average · 0.88x cost multiplier

In St. Louis, a bathroom plumbing rough-in runs $2,200 to $7,040 on average — about 12% below what homeowners pay nationwide. The Midwest market's labor costs account for most of the gap, with material pricing and local permitting fees adding to the spread. Use the cost table below to compare budget, mid-range, and premium options side by side.

Cost Breakdown in St. Louis

Line Item	Low	Mid	High
Cost per fixture	$440	$1056	$2200
Materials	$704	$1,320	$2,640
Labor	$1,760	$3,080	$6,160
Permits	$528	$704	$1,320
Total	$2,992-12% vs. national avg	$5,104-12% vs. national avg	$10,120-12% vs. national avg

Budget

Single bathroom, close to existing stack, supply and drain.

Mid-Range

Full bathroom rough-in, moderate distance from stack, proper venting.

Premium

Remote location, slab penetration or long run, complex venting.

Material Options

Material prices below are national averages; availability in St. Louis may shift costs slightly.

Material	Cost/Unit	Pros	Cons	Best For
PEX Supply Lines	$0.50-$1.50/ft	Flexible, freeze-resistant, fast to install, less expensive than copper	Can't be used for outdoor or UV-exposed applications	Most residential supply line applications; the dominant choice in new constructionFlexible, freeze-resistant, fast to install, less expensive than copper
Copper Supply Lines	$2-$4/ft	Long-lasting, naturally antimicrobial, handles high heat	More expensive than PEX, requires soldering skills, prone to theft in vacant properties	Homes with existing copper systems where matching is requiredLong-lasting, naturally antimicrobial, handles high heat
ABS Drain Pipe	$1-$2/ft	Lightweight, easy to cut and glue, lower cost than cast iron	Not allowed in all jurisdictions, can be noisier than cast iron	New construction and additions in areas where it's code-approvedLightweight, easy to cut and glue, lower cost than cast iron
PVC Drain Pipe	$0.80-$1.50/ft	Widely code-approved, durable, resistant to chemicals	Stiffer than ABS, slightly more complex joining process	Standard drain and vent applications in most residential projectsWidely code-approved, durable, resistant to chemicals
Cast Iron Drain	$3-$8/ft	Very quiet, extremely durable, required in some jurisdictions	Heavy and expensive, requires specialized tools to cut	Matching existing cast iron systems in older homesVery quiet, extremely durable, required in some jurisdictions

Other Projects in St. Louis

Full Kitchen Remodel

Basement Finishing

Roof Replacement (Asphalt Shingles)

Back to national average for Bathroom Plumbing Rough-In

St. Louis Estimate

Typical Range

$2,200–$7,040

vs. National Average

12% below national

Cost Multiplier

0.88x

Cost Per fixture

$440–$2200

Estimates apply St. Louis's 0.88x regional cost multiplier to national averages. Actual bids vary by contractor, project scope, and timing.

See national average costs →