Cost to Bathroom Plumbing Rough-In in San Francisco, CA (2026)
If you’re budgeting a bathroom plumbing rough-in in San Francisco, most projects run $3,195-$10,223, 28% above the $4,500 national average. What moves that number most is usually one thing: Distance from Main Stack. On its own it can swing the cost by $1,000 - $5,000, so that’s the decision to slow down on before you sweat the smaller stuff.
Easiest place to save: Position the new bathroom as close to the main drain stack as possible - every 10 feet of additional drain run adds $300-$600 in materials and labor
In the West Coast (where San Francisco sits): CA licensed plumbers command 25-35% premium over national average; permit processing can be slow.
$3,195-$10,223 in San Francisco
28% above the national average · 1.28x cost multiplier
Expect to pay $3,195-$10,223 for a bathroom plumbing rough-in in San Francisco, about 28% above the national benchmark. The West Coast region's contractor market and material costs account for most of this difference. The detailed breakdown below shows how budget, mid-range, and premium projects compare at San Francisco prices.
Cost Breakdown in San Francisco
| Line Item | Low | Mid | High |
|---|---|---|---|
| Cost per fixture | $639 | $1533 | $3195 |
| Materials | $1,020 | $1,912 | $3,825 |
| Labor | $2,560 | $4,479 | $8,959 |
| Permits | $765 | $1,020 | $1,912 |
| Total | $4,345+28% vs. national avg | $7,411+28% vs. national avg | $14,696+28% 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 San Francisco may shift costs slightly.
| Material | Cost/Unit | Best For |
|---|---|---|
| PEX Supply Lines | $0.50-$1.50/ft | 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 | Homes with existing copper systems where matching is requiredLong-lasting, naturally antimicrobial, handles high heat |
| ABS Drain Pipe | $1-$2/ft | 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 | Standard drain and vent applications in most residential projectsWidely code-approved, durable, resistant to chemicals |
| Cast Iron Drain | $3-$8/ft | Matching existing cast iron systems in older homesVery quiet, extremely durable, required in some jurisdictions |
Other Projects in San Francisco
San Francisco Estimate
Typical Range
$3,195-$10,223
vs. National Average
28% above national
Cost Multiplier
1.28x
Cost Per fixture
$639-$3195
This 1.28x estimate prices San Francisco labor from BLS Occupational Employment and Wage Statistics (May 2025) and applies a lighter regional adjustment to materials and permits, which vary less by metro than labor does. Actual bids vary by contractor, project scope, and timing.
See national average costs →