Washington County, MD solar installation & market data
Updated December 28, 2022Older data · growth withheldProvisional score · under 500 installs By The SolarDNA Data Team
Washington County has 109 solar installations across 14 zip codes at a median installed cost of $3.88/W, recent growth not yet measurable, and an installs-weighted Market Score of 50.
Active installations
109
Zip markets
14
Median cost
$3.88/W
12-mo growth
—
Installers active
0
County Market Score
Great · installs-weighted across 14 zips
Best zip in Washington County scores higher than 97% of U.S. zip markets.
Versus Maryland
How Washington County compares with the state
Installed cost
$0.17/W above
state median $3.71/W
Market score
50 vs 68
Maryland scores 68
Share of state installs
0.35%
of 31.5K tracked statewide
Battery attach
0.0%
state 0.0%
Statewide momentum
▲ 35.7%
residential solar added in Maryland, 12 months through Jul 2026
Statewide market
127.7K systems
7.8% of homes · utility-reported through Jul 2026
Growth & pricing
Washington County by year
85 installs in the trailing twelve months vs 24 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Washington County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|
Zip markets
Zips in Washington County
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 21740 | 50 | $3.87 | 50 B |
| 21742 | 18 | $3.92 | 49 B |
| 21783 | 10 | $3.35 | 52 A |
| 21713 | 7 | $2.80 | 55 A |
| 21756 | 6 | $3.04 | 53 A |
| 21722 | 5 | $3.60 | 51 A |
| 21750 | 4 | $6.51 | 38 D |
| 21719 | 2 | $4.07 | 49 B |
| 21747 | 2 | $4.28 | 48 B |
| 21767 | 1 | $5.46 | 42 C |
| 21782 | 1 | $4.24 | 48 B |
| 21795 | 1 | $4.57 | 46 B |
| 21779 | 1 | $9.24 | 38 D |
| 21733 | 1 | $2.93 | 54 A |