Garage Electrical Installation Pricing for Electricians
Electricians should charge $1,500–$4,000 for a comprehensive attached garage electrical upgrade including a subpanel, 4–6 circuits, LED lighting, and outlets. Detached garage electrical installations with underground feeder run $3,000–$8,000. Individual garage circuits run $250–$500 each, and a 240V outlet for a welder or compressor costs $400–$800.
Garage electrical upgrades are one of the most common home improvement projects, driven by the rise of home workshops, EV ownership, and the need for functional workspace. Most older garages have inadequate electrical — often just a single circuit serving a light and one or two outlets. Upgrading a garage to a fully functional workspace or workshop creates a high-value project with clear scope and strong margins.
Assessing Garage Electrical Needs
Start every garage project with a thorough assessment. Key questions: What does the homeowner plan to use the garage for (parking, workshop, gym, home office, storage)? What is the current electrical setup (number of circuits, outlet locations, lighting)? Is the garage attached or detached? Does the homeowner need 240V for specific tools or equipment? Is an EV charger planned now or in the future? A basic garage upgrade (better lighting and a few more outlets) might involve 2–3 new circuits at $500–$1,000 total. A full workshop conversion needs 4–8 circuits, a subpanel, and possibly 240V service — a $2,000–$5,000 project. Always ask about future plans — a homeowner who says "just a couple outlets" today often wants EV charging, a workshop, or a home gym within a few years. Wiring for future needs during the initial project is far cheaper than coming back later.
Attached Garage Electrical Pricing
Attached garages are simpler because you can run circuits directly from the main panel through the common wall. For a basic upgrade (add 2 circuits, 4–6 outlets, and improve lighting), plan 4–6 hours of labor and charge $800–$1,500. For a comprehensive upgrade with a 60A or 100A subpanel, 4–6 dedicated circuits, ample 120V outlets around the perimeter, one or two 240V outlets, and LED shop lighting, plan 8–14 hours and charge $2,000–$4,000. The subpanel approach (Eaton or Square D 60A–100A load center at $100–$250 wholesale) is recommended for any installation with more than 3 new circuits because it simplifies routing — one feeder cable from the main panel to the garage subpanel instead of multiple individual circuit runs. A 60A subpanel with 6/3 SER cable and a 2-pole 60A breaker at the main panel costs $200–$400 in materials for a typical 20-foot run.
Detached Garage Electrical Pricing
Detached garage electrical is a premium project because of the underground feeder run. The underground conduit and wire from the main panel to the detached garage is the major cost driver. For a 60-foot underground run (typical for suburban properties): trenching costs $10–$20 per linear foot for hand digging or $5–$12 per foot with a trencher rental ($150–$250/day). PVC conduit (1" schedule 40) runs $0.50–$1.00 per foot. Wire (6/3 for 60A or 2/2/2/4 aluminum SER for 100A) runs $3–$7 per foot. Total underground feeder cost for 60 feet: $800–$2,000. Add a 60A–100A subpanel with breakers ($200–$400), interior wiring ($500–$1,500 for 4–6 circuits), and lighting ($200–$500). A complete detached garage electrical installation runs $3,000–$8,000 depending on distance, service size, and interior circuit count. For runs over 100 feet, use 2/2/2/4 aluminum SER cable instead of copper 6/3 to save 30–40% on wire cost while maintaining adequate ampacity.
Garage Lighting and Outlet Layout
Proper garage lighting makes a dramatic difference in usability. Replace single-bulb fixtures with 4-foot LED shop lights (Lithonia, Hykolity, or Barrina at $25–$50 each) or LED wraparound fixtures at $30–$60 each. A two-car garage needs 4–6 fixtures for even illumination — plan one fixture per 50 sq ft of floor space. Mount at 8 feet or flush to the ceiling. Charge $75–$150 per fixture installed on existing circuits, or $200–$400 per fixture on a new dedicated lighting circuit. For outlets, follow the NEC requirement of at least one receptacle on each garage wall (with a minimum of one GFCI-protected outlet). Workshop garages need far more — plan outlets every 4–6 feet at counter height (48 inches) around workbench areas, plus a floor-level outlet ring for power tools. Use 20A circuits with 12/2 Romex and spec-grade GFCI outlets ($15–$25 each) or one GFCI outlet per circuit protecting downstream standard outlets. Price per outlet: $75–$150 for additional outlets on existing circuits, $150–$250 for outlets on new circuits.
240V Circuits and EV Charger Pre-Wiring
Most garage workshop upgrades include at least one 240V circuit. Common 240V loads include welders (30A–50A), air compressors (30A), table saws and planers (20A–30A), and EV chargers (40A–50A). Price each 240V circuit at $400–$800 depending on amperage and wire run length. When installing a subpanel, include spare capacity for future 240V loads. A 100A subpanel gives ample room for both current and future needs, while a 60A panel limits expansion. The cost difference between a 60A and 100A subpanel setup is only $100–$200 in materials — always recommend the larger option. EV charger pre-wiring is a valuable upsell even if the homeowner does not currently drive an EV. Run a 50A circuit with a NEMA 14-50 outlet to the planned charging location during the initial installation — the incremental cost is $200–$400 if done alongside other work, versus $800–$1,500 as a standalone job later. Frame this as future-proofing: "Adding the EV outlet now costs a fraction of what it would cost as a separate project."
Permits and Project Approach
Garage electrical work requires a permit in most jurisdictions, especially for new circuits, subpanels, and underground feeders. Permit costs run $75–$250. For detached garages, some jurisdictions require a separate meter and disconnect — check local requirements before quoting. The inspection typically covers: proper grounding and bonding at the subpanel (separate ground and neutral bars in a subpanel), GFCI protection for all garage outlets, correct wire sizing and breaker ratings, proper burial depth for underground feeders (18 inches minimum for UF-B, 12 inches for rigid PVC conduit), and tamper-resistant receptacles if required by local code. For quoting, always perform an on-site assessment — measure the distance from the main panel to the garage, inspect the panel for capacity, and document the homeowner's requirements. Provide a written estimate with clear line items: subpanel and feeder, circuits and outlets, lighting, 240V circuits, and permit. This transparency builds confidence and reduces negotiation.
Frequently Asked Questions
A subpanel is recommended when adding more than 3 circuits to a garage. It centralizes the garage electrical at one location, simplifies future modifications, and requires only one feeder run from the main panel instead of multiple individual circuits. For detached garages, a subpanel is essentially required because you want to minimize the number of underground wire runs.
Create Professional Estimates in Minutes
Stop spending hours on estimates. QuotrPro uses AI to help electricians create accurate, professional proposals that win more jobs.
Try Free for 3 DaysNo credit card required · 30-day money-back guarantee
Related Articles
Dedicated Circuit Installation Pricing for Electricians
How to price dedicated circuit installations. Covers 120V and 240V circuits, home offices, appliances, workshops, and profit margins for electricians.
EV Charger Installation Pricing Guide for Electricians
How to price Level 2 EV charger installations. Covers 240V circuit costs, panel capacity checks, trenching for detached garages, and profit margins.
Panel Upgrade Cost: What Electricians Should Charge
Learn how to price electrical panel upgrades from 100A to 200A. Covers labor rates, material costs, permit fees, and profit margins for electricians.
Outdoor Electrical Installation Cost Guide for Electricians
How to price outdoor electrical installations. Covers patio outlets, outdoor kitchens, pool equipment, post lights, and profit margins for electricians.
Hot Tub and Spa Wiring Cost Guide for Electricians
How to price hot tub and spa electrical installations. Covers 240V circuits, GFCI disconnects, wire sizing, permit requirements, and profit margins.
More Electricians Estimating Guides
No credit card required