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Sonoma County, CA solar installation & market data

Updated May 6, 2026 By The SolarDNA Data Team

Sonoma County has 38,767 solar installations across 45 zip codes at a median installed cost of $4.63/W, installations down 9.7% over the trailing twelve months, and an installs-weighted Market Score of 43.

See Sonoma County on the map California market

Active installations

38,767

Zip markets

Median cost

$4.63/W

12-mo growth

▼ 9.7%

Installers active

1,098

County Market Score

Good · installs-weighted across 45 zips

Best zip in Sonoma County scores higher than 82% of U.S. zip markets.

Versus California

How Sonoma County compares with the state

Installed cost

$0.37/W above

state median $4.26/W

Market score

43 vs 53

California scores 53

Share of state installs

1.71%

of 2.3M tracked statewide

Battery attach

13.0%

state 12.7%

Statewide momentum

▲ 1.1%

residential solar added in California, 12 months through Jul 2026

Statewide market

2.3M systems

30.9% of homes · utility-reported through Jul 2026

Next-12-month outlook: 2,150–2,628 installs (midpoint 2,389)

Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±10% band. Not a forecast of permits or policy.

Growth & pricing

Sonoma County by year

2,511 installs in the trailing twelve months vs 2,782 before

Installations by year

Median installed cost, $/W DC by year

Installer comp set

Who installs in Sonoma County

Summed across every zip in the county

Export CSV

#	Installer	Installs	12-mo	Zips	$/W
1	SUNRUN	5,558	532	31	$4.50
2	TESLA	3,885	76	31	$5.10
3	NORTHERN PACIFIC POWER	2,064	0	33	$4.01
4	SUNPOWER	1,284	37	27	$4.92
5	ROCKIN ROOFERS	1,074	29	30	$4.30
6	SOLAR WORKS	1,021	33	32	$6.38
7	SOLARCRAFT SERVICES	926	35	26	$5.35
8	SUNTEGRITY SOLAR	793	42	26	$4.05
9	FREEDOM FOREVER	725	34	25	$5.40
10	CITADEL ROOFING AND SOLAR	659	31	27	$3.29
11	SYNERGY SOLAR	659	0	27	$4.50
12	PETERSENDEAN	644	0	31	$3.83
13	J J ELECTRIC	607	0	30	$3.91
14	BRIGHT OPS	605	180	19	$5.02
15	PURE POWER SOLUTIONS	521	23	22	$3.84
16	BETTER EARTH	506	0	23	$5.08
17	RGS ENERGY	496	0	31	$6.46
18	WESTCOAST SOLAR ENERGY	409	6	31	$4.36
19	TAYLOR ENERGY SYSTEMS	361	39	26	$3.98
20	A1 SOLAR POWER	344	0	25	$6.74
21	MICHAEL AND SUN SOLAR	339	0	24	$3.84
22	FIRST RESPONSE SOLAR	336	16	26	$3.74
23	SUN FIRST	330	4	22	$5.06
24	SUMMIT ELECTRIC	304	0	27	$4.15
25	SUNRISE SOLAR	301	23	24	$3.89

Zip markets

Zips in Sonoma County

Ranked by installations · click for the zip market

Zip	Installs	$/W	Score
95404	3,920	$4.65	44 C
95472	3,636	$4.74	41 C
95476	3,273	$4.73	47 B
95403	3,259	$4.48	47 B
94952	2,964	$4.43	44 C
95409	2,888	$4.69	43 C
94928	2,764	$4.37	43 C
94954	2,520	$4.42	44 C
95492	2,272	$4.60	48 B
95401	1,958	$4.77	40 C
95407	1,790	$4.98	37 D
95405	1,641	$4.44	48 B
95425	972	$4.69	44 C
95448	888	$4.92	35 D
95442	561	$5.12	37 D
94931	545	$4.64	39 C
94951	488	$4.39	40 C
95497	399	$5.20	36 D
95436	366	$4.51	39 C
95452	304	$4.51	39 C
94923	268	$4.57	38 D
95446	228	$4.82	37 D
95441	226	$5.03	36 D
95465	191	$5.12	35 D
95444	96	$3.91	41 C
95462	67	$4.13	39 C
95421	62	$5.99	31 F
95450	61	$5.44	33 D
95439	52	$4.52	37 D
94922	39	$5.14	34 D
95412	15	$4.22	39 D
94972	14	$4.12	39 C
94926	9	$6.87	28 F
95430	5	$4.14	39 C
95419	5	$5.24	34 D
95471	3	$4.41	38 D
95473	3	$7.02	28 F
95406	3	$6.01	30 F
95480	3	$4.32	38 D
95486	3	$6.78	28 F
95402	2	$4.71	36 D
94955	1	$7.77	28 F
94927	1	$8.64	28 F
95433	1	$2.02	48 B
94975	1	$7.39	28 F