Bathroom Electrical Rough-In Cost for Electricians
Electricians should charge $1,200–$3,000 for a complete bathroom electrical rough-in including a dedicated 20A GFCI circuit for outlets, exhaust fan circuit, vanity lighting circuit, and overhead lighting. Master bathrooms with heated floors, towel warmers, and whirlpool tubs run $2,500–$5,000. Individual bathroom circuits cost $250–$500 each.
Bathroom electrical rough-in work comes from two primary sources: new construction and bathroom remodels. Both offer strong revenue potential because bathrooms have some of the most specific code requirements of any room — dedicated GFCI circuits, exhaust fan requirements, and wet-location ratings all demand licensed electrical work. Bathroom remodels are especially profitable because the walls are typically open, giving you easy access for new circuit runs.
NEC Code Requirements for Bathrooms
Bathrooms have specific electrical code requirements that drive your scope and pricing. Every bathroom needs: at least one 20A GFCI-protected circuit for receptacles (this circuit can serve receptacles in multiple bathrooms, but cannot serve lighting or other loads), GFCI protection on all receptacles within 6 feet of a water source, at least one wall switch-controlled light fixture, and an exhaust fan (required by IRC in bathrooms without an operable window, and required by many local codes regardless of windows). Additional code points: receptacles must be within 36 inches of each basin, all lighting fixtures in shower/tub areas must be rated for wet or damp locations (depending on zone), and any receptacle or switch within the shower/tub zone must be GFCI-protected. These requirements mean even a basic half-bath needs 2–3 circuits (outlet, light, fan), while a master bath can easily need 4–6 circuits.
Basic Bathroom Rough-In Pricing
A standard full bathroom rough-in includes: one 20A GFCI outlet circuit (12/2 NM-B to 1–2 receptacle locations), one lighting circuit (14/2 NM-B for vanity light, overhead light, and switch), one exhaust fan circuit (14/2 NM-B with separate switch or timer), and junction boxes for all devices. Materials for a basic rough-in run $100–$250: wire (100–200 feet of 14/2 and 12/2 at $0.40–$0.75/ft), junction boxes ($2–$5 each, 6–10 needed), GFCI outlet ($15–$25), standard outlets and switches ($2–$5 each), and wire connectors. Labor takes 4–8 hours depending on accessibility and routing complexity. Price a basic full bath rough-in at $800–$1,500. A half-bath with one outlet, one light, and an exhaust fan runs $500–$1,000. These are rough-in prices only — trim-out (installing devices, fixtures, and cover plates after drywall) adds $200–$400 and 2–3 hours of labor.
Master Bathroom Premium Features
Master bathroom remodels are where the real revenue is. Premium electrical features include: heated tile floors (Schluter DITRA-HEAT, NuHeat, or SunTouch mats at $10–$15 per sq ft for the mat, requiring a dedicated 15A or 20A circuit and a programmable thermostat) — charge $500–$1,000 for the electrical work including thermostat, circuit, and rough-in. Towel warmers (hardwired units by Amba or WarmlyYours at $200–$500 for the unit, requiring a dedicated circuit and timer switch) — charge $250–$500 for the electrical installation. Whirlpool or soaker tub with jets (requiring a dedicated 20A circuit, GFCI protection, and often a motor access panel) — charge $300–$600 for the electrical. Steam shower generators (Mr. Steam or ThermaSol at $1,500–$4,000, requiring a dedicated 240V circuit) — charge $400–$800 for the electrical work. A fully loaded master bath rough-in with all premium features can reach $3,000–$5,000 in electrical work alone.
Exhaust Fan Wiring and Options
Exhaust fan wiring is part of every bathroom electrical project. Basic exhaust fans (Broan-NuTone or Panasonic WhisperCeiling at $80–$200) require a single 14/2 NM-B cable from a wall switch to the fan location. For fan-light combos, use 14/3 cable to allow separate switch control of the fan and light. Premium options include: humidity-sensing fans that turn on automatically (Panasonic WhisperSense at $150–$250), fan-light-heater combos (Broan 765H at $100–$200), and fans with Bluetooth speakers (Homewerks 7130-16-BT at $100–$150). The wiring for premium fans varies — heater models require a dedicated 20A circuit due to the heat element load (1,300–1,500 watts). Charge $150–$300 for basic exhaust fan wiring and $250–$500 for premium fan installations requiring dedicated circuits or additional controls. Always use insulated flex duct from the fan to the roof or soffit vent — rigid duct is better for airflow but harder to route in tight bathroom spaces.
Vanity and Decorative Lighting Wiring
Bathroom lighting has evolved beyond a single vanity bar light. Modern master baths often include: vanity sconces on each side of the mirror (two junction boxes at 60–66 inches from the floor), an overhead vanity light (additional junction box above the mirror), recessed lighting over the tub and shower area (wet-rated IC housings required in shower zones), a decorative pendant or chandelier (popular in larger master baths), and LED mirror or medicine cabinet with built-in lighting (requiring an outlet behind the mirror). Each lighting element needs a junction box roughed in at the correct height and location before drywall goes up. Coordinate with the contractor and homeowner on exact fixture selections before rough-in — moving a junction box after drywall costs $150–$300 in rework. For the lighting rough-in, charge $75–$150 per junction box including the wire run from the switch location. A master bath with 6–8 lighting points runs $450–$1,200 for the lighting rough-in alone.
Remodel vs. New Construction Considerations
In new construction, bathroom rough-in is straightforward because walls are open. You can run wire freely, position boxes precisely, and coordinate with the plumber and HVAC before drywall. Price new construction bathroom rough-in 20–30% lower than remodel work because of the easier access. In remodels, the situation depends on whether the walls are opened up. A full gut remodel (walls opened to studs) is nearly as easy as new construction. A partial remodel where only some walls are opened requires fishing wire through finished cavities for some runs — plan additional time and price accordingly. The biggest remodel challenge is upgrading old wiring that does not meet current code. Many older bathrooms have no GFCI protection, share circuits with other rooms, and have inadequate exhaust fan wiring. Your remodel estimate should include bringing all electrical up to current code, which homeowners appreciate as added safety value rather than unnecessary cost.
Frequently Asked Questions
NEC allows bathroom receptacle circuits to be shared among multiple bathrooms, but they cannot serve other room types (no bedroom or hallway outlets on the bathroom circuit). The circuit must be 20A and GFCI-protected. Many electricians prefer a dedicated circuit per bathroom for simplicity and to avoid nuisance trips affecting multiple bathrooms simultaneously.
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