Key takeaways
- Typical cost in Longmont: $1,300–$3,000 (per installed panel); national range $1,300–$3,000.
- Biggest local factors: long heating season.
- How long it takes: Most panel upgrades take about 4–8 hours of labor, plus utility scheduling.
- Permits: A permit is required, typically $50–$300; the electrician usually pulls it.
- Best timing: Upgrade before adding electric heat or a heat pump for winter.
- Before you hire: get at least three written, itemized quotes from licensed, insured Colorado contractors.
How much does electrical panel upgrade cost in Longmont, CO?
An electrical panel upgrade typically costs $1,300–$3,000, with an average around $2,150. Amperage, meter and service changes, and subpanels drive the price. Colorado prices run at the U.S. average, so a typical Longmont job lands around $1,300–$3,000. Local labor rates, permit fees and your home's specifics move the final number.
| Item | Typical cost | Notes |
|---|---|---|
| 100-amp panel installed | $800–$1,500 | |
| 150-amp panel installed | $1,300–$1,600 | |
| 200-amp panel / 100→200 amp upgrade | $1,300–$3,000 | |
| 400-amp service | $2,000–$4,000 | |
| Meter box | $200–$800 | Must match the new service |
| Subpanel | $400–$1,750 | |
| Permit | $50–$300 | Electrician usually pulls it |
Longmont is big enough to have a solid pool of local contractors, and many regional companies also serve the area, so getting three quotes is easy.
How we calculate costs
National ranges come from published cost surveys (cited below). Local estimates apply an approximate state cost index. Read our methodology.
Electrical Panel Upgrade cost questions for Longmont, CO
- What is the cost of 100-amp panel installed in Longmont, CO? The typical cost of 100-amp panel installed in Longmont, CO is $800–$1,500.
- What is the cost of 150-amp panel installed in Longmont, CO? The typical cost of 150-amp panel installed in Longmont, CO is $1,300–$1,600.
- What is the cost of 200-amp panel / 100→200 amp upgrade in Longmont, CO? The typical cost of 200-amp panel / 100→200 amp upgrade in Longmont, CO is $1,300–$3,000.
- What is the cost of 400-amp service in Longmont, CO? The typical cost of 400-amp service in Longmont, CO is $2,000–$4,000.
- What is the cost of meter box in Longmont, CO? The typical cost of meter box in Longmont, CO is $200–$800. Must match the new service.
- What is the cost of subpanel in Longmont, CO? The typical cost of subpanel in Longmont, CO is $400–$1,750.
- What is the cost of permit in Longmont, CO? The typical cost of permit in Longmont, CO is $50–$300. Electrician usually pulls it.
- What is the cost of move the panel in Longmont, CO? The typical cost of move the panel in Longmont, CO is $800–$3,000.
- What is the cost of main breaker replacement in Longmont, CO? The typical cost of main breaker replacement in Longmont, CO is $200–$300. $500–$2,000 if the bus bar is damaged.
- What is the cost of AFCI/GFCI breakers in Longmont, CO? The typical cost of AFCI/GFCI breakers in Longmont, CO is $35–$60 each. Often required by code.
What affects electrical panel upgrade in Longmont
Longmont has cold, snowy winters and warm summers. Upgrade before adding electric heat or a heat pump for winter.
Signs you need a panel upgrade
- Breakers trip often
- Lights flicker or dim when appliances run
- You rely on power strips or can't run appliances together
- The panel buzzes, feels hot or smells burnt
- Rust or visible damage
- A Federal Pacific or Zinsco panel, or plans for an EV charger or heat pump
Common questions about electrical panel upgrade in Longmont
How much does an electrical panel upgrade cost in Longmont, CO?
Most panel upgrades cost about $1,300–$3,000 in Longmont, CO. A 100-to-200-amp upgrade typically runs $1,300–$3,000 nationally.
Do I need a 200 amp panel?
Most modern homes with central air, electric appliances or an EV charger are planned around 200 amps. A load calculation tells you for sure.
Is a Federal Pacific or Zinsco panel dangerous?
Both are widely flagged as outdated, and many electricians recommend replacing them.
How much does a subpanel cost?
A subpanel typically costs $400–$1,750 installed and can add circuits for a garage, addition or EV charger.
Timeline, permits and DIY in Longmont
How long it takes
Most panel upgrades take about 4–8 hours of labor, plus utility scheduling.
Permits
A permit is required, typically $50–$300; the electrician usually pulls it. Check with the Longmont building department for local rules.
DIY or hire a pro?
Not a DIY job: a licensed electrician must do the work and coordinate with the utility.
Questions to ask Longmont contractors
Ask every bidder the same questions so you can compare quotes apples to apples.
- Did you do a load calculation for my home?
- Does the quote include the meter, permit and utility coordination?
- Which breakers will be AFCI or GFCI to meet code?
- Will the power be off, and for how long?
Maintenance that prevents costly repairs
- Have the panel inspected if breakers trip often
- Never ignore buzzing or burning smells
- Label circuits clearly
How to hire for electrical panel upgrade in Longmont
- Use a licensed, insured electrician.
- Ask for a load calculation to size the new service.
- Confirm the permit, inspection and utility coordination are included.
- Get the warranty for parts and labor in writing.
Electrical Panel Upgrade in Longmont: FAQs
How much does an electrical panel upgrade cost in Longmont, CO?
Nationally, most upgrades cost $1,300–$3,000. Local permit fees and utility requirements change the final price.
Do I need a permit for a panel upgrade in Longmont?
Yes. A licensed electrician typically pulls the permit and coordinates with the utility.
Will I need a panel upgrade to add a heat pump in Longmont?
Possibly. Ask for a load calculation; many older homes need 200-amp service for heat pumps and EV chargers.
How much does electrical panel upgrade cost in Longmont compared to the national average?
With Colorado's regional cost index of 1.00, expect roughly $1,300–$3,000 in Longmont, versus $1,300–$3,000 nationally.
How long does electrical panel upgrade take in Longmont?
Most panel upgrades take about 4–8 hours of labor, plus utility scheduling. Permit and inspection scheduling in Longmont can add a few days.
Do I need a permit for electrical panel upgrade in Longmont?
A permit is required, typically $50–$300; the electrician usually pulls it. Confirm with the Longmont or county building department.
Which Longmont ZIP codes does this guide cover?
This guide applies to Longmont ZIP codes 80501, 80502, 80503, 80504, plus the surrounding area.
Electrical Panel Upgrade near Longmont
6 mi away · pop. 4,006Mead, CO
7 mi away · pop. 4,476Gunbarrel, CO
8 mi away · pop. 9,263Erie, CO
9 mi away · pop. 21,420Firestone, CO
10 mi away · pop. 11,999Lyons, CO
10 mi away · pop. 2,147Berthoud, CO
10 mi away · pop. 6,031Frederick, CO
10 mi away · pop. 11,413Dacono, CO
10 mi away · pop. 4,792
Other home services in Longmont
Sources: This Old House — Cost to upgrade an electrical panel · Angi — Cost to upgrade an electrical panel. Ranges are rounded estimates; see our editorial policy.
Local risk factors reflect general Colorado climate patterns; check FEMA's National Risk Index for county-level ratings. Local estimates apply an approximate regional cost index to national ranges.