Electric Heat for Your Garage — Twin Cities Installation
Electric heat in a garage means a dedicated 240-volt circuit, a properly sized heater — unit heater, infrared, or baseboard — and a licensed local electrician who knows Minnesota load calculations and code. Norske Electric (MN license #EA005268) has handled garage heating installs across the Twin Cities metro for 18 years, holds a BBB A+ rating, and carries a 5.0-star average across 622 verified reviews. Every install is permitted, inspected, and backed by full liability insurance.
A cold garage in a Minnesota winter isn't just uncomfortable — it damages vehicles, cracks concrete, and turns every task into a miserable one. Getting this done right the first time means sizing the heater to your garage's cubic footage, running the correct wire gauge, and installing a dedicated breaker that won't trip every time the unit kicks on. That's the work we do every week across the metro.
Which Heater Type Is Right?
Three types dominate garage electric heat installs: unit heaters (forced-air), infrared radiant heaters, and electric baseboard heaters. Each has a different electrical demand and a different installation profile.
Forced-air unit heaters circulate warm air fast — good for large, open bays. They typically draw 240 volts and require a 30- to 60-amp dedicated circuit depending on wattage. Infrared heaters warm objects and people directly rather than the air, which makes them efficient in drafty garages with poor insulation. Baseboard heaters work well in smaller, insulated spaces but they're slow to recover heat after a door opens.
Honestly, most homeowners overthink the heater choice and underthink the electrical capacity. The heater brand matters far less than whether your panel has room for another 240-volt circuit and whether the wiring gauge matches the load. That's where we start every quote.
Electrical Requirements for Garage Heat
Most electric garage heaters require a dedicated 240-volt circuit — you can't share it with outlets, lights, or other loads. The breaker size depends on the heater's wattage rating. A 5,000-watt heater at 240 volts draws roughly 21 amps, so a 30-amp breaker with 10-gauge wire is the minimum. Larger 7,500-watt units need a 40-amp circuit with 8-gauge wire.
If your panel is already near capacity — common in homes built before 1990 with 100-amp service — you may need a panel upgrade before the heater circuit can be added safely. We check panel capacity before quoting any garage heat job. We won't pull wire to a panel that can't support it safely.
The circuit also needs to be GFCI-protected if the heater is within six feet of a sink or in an unfinished garage space, per current NEC requirements adopted in Minnesota. We handle the permit and the inspection — you don't have to coordinate that separately.
What the Installation Process Looks Like
The process starts with a site visit — we look at the panel, measure the garage, and confirm the heater location before any wire gets pulled. If you've already purchased a heater, we verify it's correctly sized for the space. If you haven't, we'll tell you exactly what wattage range to shop.
From there: permit application with the local jurisdiction, circuit run from the panel to the heater location, mounting, connection, and inspection scheduling. Most installs complete in a single day. Complex runs — detached garages, long conduit runs through finished space, or panels that need work first — take longer, and we'll tell you upfront if that's the case.
We don't subcontract. The electrician who pulls your permit is the one doing the work. That matters when the inspector shows up and has questions.
Detached Garage Installs: What Changes
A detached garage adds a layer of complexity: you need a subpanel or a dedicated feeder circuit run underground from your main panel to the structure. Minnesota requires this underground run to be in conduit at the correct burial depth — 24 inches for PVC, 6 inches for rigid metal conduit under concrete.
If the garage doesn't have electricity at all, we often recommend installing a small subpanel rather than running individual circuits for the heater, lights, and outlets separately. A subpanel is more expensive upfront but far cheaper than opening the same trench twice.
Electrical companies vary widely on how they handle detached garage work. Some quote only the heater circuit and leave the feeder run as a surprise add-on. We quote the complete scope — feeder, subpanel if needed, circuit, and heater connection — so the number you see is the number you pay.
Norske Electric: 18 Years, 622 Reviews
Norske Electric is a family-owned electrical company serving the Twin Cities metro since 2007. Owner Brevik Tharaldson built the business around one principle: do the job the way you'd want it done in your own house. That's not a slogan — it shows up in how we quote, how we permit, and how we clean up after ourselves.
We hold MN electrical license #EA005268, carry full liability insurance, and have earned a BBB A+ rating, the Angie's List Super Service Award, and the Best of HomeAdvisor designation. Our 5.0-star average across 622 reviews isn't something we bought — it's what happens when you do straightforward work at a fair price without hiding anything.
If you need a licensed Twin Cities electrician for a garage heating project, call (952) 443-4113. We're available Monday through Friday, 7 a.m. to 6 p.m., and emergency service is available when something can't wait.
Frequently Asked Questions
Do I need a permit to install electric heat in my garage?
Yes, in virtually every Twin Cities jurisdiction, a new 240-volt circuit for a garage heater requires an electrical permit and inspection. Skipping the permit isn't just a code violation — it's a problem when you sell the house and the inspector flags unpermitted electrical work. Norske Electric handles the permit application and coordinates the inspection as part of every install.
How much electricity does a garage heater use?
A 5,000-watt electric garage heater running at full output draws about 21 amps at 240 volts. Running it eight hours a day at Minnesota's average residential rate adds roughly $30–$50 per month to your electric bill depending on usage and rate. Infrared heaters are more efficient in drafty or high-ceiling spaces because they heat surfaces rather than air, so they cycle off sooner.
Can I use a 120-volt heater in my garage to avoid a new circuit?
You can, but you shouldn't expect meaningful results in a Minnesota winter. A 120-volt heater maxes out around 1,500 watts — enough to take the edge off a small, well-insulated space, not enough to maintain working temperatures when it's below zero outside. If you have a two- or three-car garage, a 120-volt unit is wasted money. The right answer is a 240-volt dedicated circuit and a properly sized heater.
Will my existing panel support a garage heater circuit?
It depends on your panel's current load and the number of open breaker slots. Homes with 100-amp service and older panels often don't have capacity for an additional 30- to 60-amp 240-volt circuit without a panel upgrade. We check your panel before quoting — if an upgrade is needed, we tell you before any work starts, not after.
How long does a garage heater installation take?
A straightforward attached-garage install — panel to heater, single circuit — typically finishes in one day. A detached garage with no existing power, or a job that requires panel work first, takes longer. We give you a realistic timeline at the quote stage. We don't tell people 'one day' and then need to come back three times.
What's the difference between an infrared heater and a forced-air unit heater for a garage?
Forced-air unit heaters heat the air and circulate it — they warm the whole space faster but lose heat quickly when garage doors open. Infrared heaters emit radiant heat that warms objects and people directly, so they're more efficient in garages with poor sealing or high ceilings. Both require 240-volt dedicated circuits. The right choice depends on how your garage is built and how you use it — we can walk you through both options on-site.
Serving the Twin Cities Metro
Norske Electric serves homeowners throughout the Minneapolis–St. Paul metro area, including Apple Valley, Bloomington, Brooklyn Park, Burnsville, Eagan, Eden Prairie, Excelsior, Golden Valley, Lakeville, Maple Grove, Medina, Minnetonka, Orono, Plymouth, and Savage. Our licensed, bonded, and insured electricians dispatch from our offices in Hamel and Savage and respond quickly to projects of every size. Call (952) 443-4113 for a free estimate or to schedule service.