San Mateo, CA 94403 solar market data
Updated April 28, 2026 By The SolarDNA Data Team
San Mateo 94403 has 1,992 solar installations at a median installed cost of $4.29/W, installations up 63.4% over the trailing twelve months, and a Market Score of 61 — higher than 99% of U.S. zip markets.
Zip Market Score
Excellent · higher than 99% of zips
Versus California
How 94403 compares with the state
Installed cost
$0.02/W above
state median $4.26/W
Market score
61 vs 53
California scores 53
Share of state installs
0.09%
of 2.3M tracked statewide
Battery attach
11.7%
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: 162–218 installs (midpoint 190)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±15% band. Not a forecast of permits or policy.
Growth & pricing
94403 by year
165 installs in the trailing twelve months vs 101 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 94403
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 374 | 14 | 5.98 | $5.12 |
| 2 | SUNRUN | 257 | 49 | 5.1 | $4.43 |
| 3 | LEONARD ROOFING | 188 | 0 | 3.13 | $3.80 |
| 4 | SUNPOWER | 71 | 1 | 16.58 | $4.80 |
| 5 | ROCKIN ROOFERS | 52 | 8 | 6.58 | $4.05 |
| 6 | SEMPER SOLARIS | 43 | 4 | 5.53 | $4.45 |
| 7 | PETERSENDEAN | 41 | 0 | 5.34 | $3.84 |
| 8 | SUN FIRST | 39 | 0 | 12.2 | $4.30 |
| 9 | CLEAN SOLAR | 32 | 1 | 6 | $4.44 |
| 10 | SOLAR OPTIMUM DESIGN ELECTRIC | 32 | 0 | 7.53 | $3.13 |
| 11 | YOUR ENERGY SOLUTIONS | 26 | 4 | 6.92 | $4.02 |
| 12 | COBALT POWER SYSTEMS | 24 | 2 | 6.61 | $5.27 |
Neighboring zips
The nearest zip markets
By distance between zip centroids
| Zip | Distance | Installs | $/W | Score |
|---|---|---|---|---|
| 94002 Belmont | 2.5 km | 1,668 | $4.45 | 44 |
| 94402 San Mateo | 2.7 km | 1,285 | $4.79 | 53 |
| 94404 San Mateo | 3.1 km | 1,036 | $4.46 | 49 |
| 94401 San Mateo | 4.3 km | 695 | $4.69 | 52 |
| 94065 Redwood City | 4.6 km | 444 | $4.34 | 40 |
| 94070 San Carlos | 5.5 km | 2,576 | $4.54 | 46 |
Same city
Other zips in San Mateo
Equipment
What gets installed in 94403
Share of systems with a recorded brand
Modules
LG ELECTRONICS16.5%
QCELLS NORTH AMERICA12.7%
SUNPOWER10.4%
YINGLI ENERGY CHINA5.4%
CSI SOLAR4.8%
Inverters
ENPHASE ENERGY38.5%
SOLAREDGE25.6%
TESLA7.9%
SUNPOWER7.0%
SMA AMERICA4.8%
Frequently asked
Quick answers about 94403
How many solar installations are there in 94403?
SolarDNA counts 1,992 active solar installations in San Mateo 94403, 1,967 of them residential, with data through April 28, 2026.
How much does solar cost in 94403?
The median residential system in 94403 cost $4.29 per watt over the trailing twelve months, $0.02/W above the California median.
Is solar growing in 94403?
Installations in 94403 are up 63.4%: 165 in the trailing twelve months versus 101 before.
Who installs solar in 94403?
TESLA, SUNRUN, LEONARD ROOFING lead the 265 installers with systems in 94403. The full comp set is above.
Is 94403 a good market for solar sales?
94403 scores 61 out of 100 (Excellent, higher than 99% of U.S. zip markets).