Sub-Panel Installation Cost in Phoenix, AZ (2026)

Sub-Panel Installation in Phoenix, AZ costs $707–$2,615 in 2026, with most homeowners paying around $1,661. That’s about 4% below the national average (BLS cost index: 0.96). Licensed electricians in the Phoenix-Mesa-Chandler metro charge $60–$105/hour. Typically takes 4-8 hours Phoenix typically requires permits for this work, running $75–$250.

Updated April 2026Based on public BLS & industry data

Estimated Cost

$707–$2,615

Mid-range estimate for 1 panel in Phoenix, AZ. Labor: $60–$105/hr.

Sub-panel (60-100A): $80–$300/each
Feeder wire (6/3 or 4/3): $100–$400/lot
Breakers for sub-panel: $40–$150/set
Conduit & fittings: $30–$150/lot
Grounding & bonding kit: $15–$40/each

Calculate Your Cost

Number of sub-panels

1–3 panel

Material Grade

Additional Factors

Detached building (underground run)(+$400–$1,200)

Main panel upgrade needed first(+$1,200–$3,000)

Factors That Affect Cost

1Sub-panel amperage and number of spaces
2Distance from main panel
3Underground vs. overhead feeder run
4Number of circuits to install in sub-panel
5Main panel capacity (upgrade may be needed)

Permit Note

Maricopa County permits are required for most construction work. Residential permits run $50–$200. The city offers expedited review for an additional fee.

Sub-panel vs. main panel upgrade

If your main panel is 200A and has open slots, you may just need more breakers. If it's full or you need power in a remote location, a sub-panel is the right solution.

Sizing your sub-panel

Calculate the total load of everything the sub-panel will serve. Add 20% headroom and choose the next standard size. Always install more spaces than you think you need.

How We Calculate These Numbers

Our cost estimates are built from publicly available data including the Bureau of Labor Statistics (BLS) Occupational Employment & Wage Statistics, HomeGuide, Thumbtack, and Fixr cost databases. Material prices reflect national averages from major retailers, cross-referenced across 3+ sources for accuracy.

For Phoenix, we apply a regional cost-of-living multiplier of 0.96 (4% below the national average) based on BLS regional data. Labor rates reflect the local Phoenix metro market as of 2026.

QuotrPro Pricing Research Team

AI-powered estimating platform used by contractors across the US. Data reviewed quarterly against BLS and industry benchmarks.

These are estimates for planning purposes. Actual costs vary by project scope, contractor, and market conditions. Always get 2–3 quotes from licensed professionals.

Frequently Asked Questions

When do I need a sub-panel?

When your main panel is full, you're finishing a basement, building a detached garage, or adding an in-law suite. Sub-panels provide local breaker access.

What size sub-panel should I get?

A 60A panel works for a small workshop. A 100A panel handles a finished basement or detached garage with power tools and HVAC.

Does the neutral need to be separated?

Yes. In a sub-panel, the neutral bus and ground bus must be separate (not bonded). This is a common DIY mistake and code violation.

How far can a sub-panel be from the main?

There's no NEC distance limit, but longer runs require larger wire to compensate for voltage drop. A 100-foot run may need 2/0 wire for 100A.