Free Plumbing Cost Calculator

Get instant estimates for any plumbing job — faucets, toilets, water heaters, repipes, drain clearing, sewer repairs, and more. Select your job type and we calculate everything.

Job Details

Number of faucets to install/repair

How to Estimate Plumbing Work

Plumbing estimates combine fixture costs, labor hours, and access complexity. Unlike painting or roofing where you price by square foot, plumbing is priced per fixture or per job — and difficulty of access is the single biggest labor variable.

Fixture costs vary wildly by grade. A builder-grade toilet runs $100-150, while a Toto Washlet is $800+. Same install labor — the fixture cost is what changes the total. Always quote specific fixtures, not vague "toilet install" pricing.

Access difficulty is where you make or lose money. A faucet swap with easy under-sink access takes 45 minutes. The same faucet behind a wall with corroded galvanized supply lines takes 4 hours. Price accordingly — our calculator adjusts labor by access difficulty.

Don't forget the hidden costs. Permits ($150-400 for water heaters, repipes), drywall repair after wall access ($200-500), disposal of old fixtures ($50-100), and code-required upgrades (expansion tanks, earthquake straps, shutoff valves). These add up fast and catch contractors off-guard.

Multi-unit jobs deserve discounts. If you're replacing 3 toilets in one trip, the per-unit cost should be lower — you only mobilize once. Our calculator applies automatic multi-unit discounts (5-20% depending on quantity).

Plumbing Cost FAQ

How much does a plumber charge per hour in 2026?

Licensed plumbers charge $75–$150 per hour for standard work, or $150–$250/hour for emergency and after-hours calls. Most plumbers also charge a service call fee ($50–$100) just to show up. Many jobs are quoted flat-rate rather than hourly — especially fixture installs and water heaters.

How much does it cost to replace a water heater?

A standard 40-50 gallon tank water heater runs $1,200–$2,200 installed. Tankless water heaters cost $2,000–$4,500 installed. The price difference is mainly in the unit itself and the additional gas/electrical work tankless systems require. Always include permit fees ($100–$300).

PEX vs copper for a whole house repipe?

PEX costs 40–60% less ($4,000–$8,000 vs $6,000–$12,000), installs faster (fewer connections), resists freezing, and works for most residential applications. Copper lasts 50+ years, has a proven track record, and may add more resale value. Most modern plumbers recommend PEX unless you have a strong preference for copper.

When do I need a plumbing permit?

Permits are required for water heaters, repipes, new gas lines, sewer work, and new bathroom rough-ins in most cities. Simple fixture swaps (faucet, toilet, disposal) typically don't require permits. Cost: $100–$400 including inspection. Skipping permits can void insurance and create legal problems when selling your home.

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