Why does solar installation cost vary by city?

Local labor rates, permit timelines, and demand differ across Southern California. Each city in our guides applies its own cost multiplier to the regional baseline, so a solar installation in a coastal premium market costs more than the same scope inland.

Is the price worth it — and how do I avoid overpaying?

Get at least three written bids for the identical scope, make finishes allowance-based, and check that permits and overhead-and-profit are shown as their own lines. Keystone matches you with up to 3 vetted contractors and will review a bid you already have.

Solar Installation Cost in Southern California (2026)

Q: How much does a solar installation cost in Southern California in 2026?

A mid-size solar installation typically runs $18k–$29k at the LA County baseline. Small projects start around $13k; large or high-end work can reach $45k or more. Orange County runs slightly above this and San Bernardino County below.

A mid-size solar installation typically runs $18k–$29k at the LA County baseline ($2.75–$3.75 per watt installed (pre-incentive)). Small projects start around $13k; large or high-end work can reach $45k or more.

Pricing varies across Southern California — Orange County runs a bit above the LA baseline and San Bernardino County below. Compare by county and city below.

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Solar Installation Cost by Size

Southern California baseline ranges (LA County = 1.0× baseline). Individual counties and cities vary — see below.

Size	Type	Range	Low	High
Small	1–2 bed home	4–5 kW	$13k	$19k
Medium	3 bed home	6–8 kW	$18k	$29k
Large	Large home / EV charging	10–14 kW	$27k	$45k

Solar Installation Cost by County

Los Angeles County

$18k–$29k

mid-size · 1.00× baseline

See LA County city-by-city

Orange County

$19k–$31k

mid-size · 1.05× baseline

See OC city-by-city

San Bernardino County

$16k–$25k

mid-size · 0.85× baseline

See SB County city-by-city

Solar Installation Cost by City

What Affects Solar Installation Cost?

System size (kW)
Panel brand and efficiency
Roof condition
Battery storage add-on
NEM 3.0 export rate
Utility interconnection

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Solar Installation Cost FAQs

Keep exploring

Compare other project costs, drill into solar installation by area, or read our guides.

Other project cost guides

Solar Installation by area

Renovation guides

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