Howard County, MD solar installation & market data
Updated February 18, 2026 By The SolarDNA Data Team
Howard County has 595 solar installations across 18 zip codes at a median installed cost of $3.10/W, installations up 82.7% over the trailing twelve months, and an installs-weighted Market Score of 53.
Active installations
595
Zip markets
18
Median cost
$3.10/W
12-mo growth
▲ 82.7%
Installers active
0
County Market Score
Excellent · installs-weighted across 18 zips
Best zip in Howard County scores higher than 99% of U.S. zip markets.
Versus Maryland
How Howard County compares with the state
Installed cost
$0.62/W below
state median $3.71/W
Market score
53 vs 68
Maryland scores 68
Share of state installs
1.89%
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
Next-12-month outlook: 341–461 installs (midpoint 401)
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
Howard County by year
349 installs in the trailing twelve months vs 191 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Howard County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|
Zip markets
Zips in Howard County
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 21042 | 119 | $2.70 | 56 A |
| 20723 | 79 | $3.26 | 53 A |
| 21043 | 62 | $2.90 | 54 A |
| 21044 | 56 | $3.34 | 52 A |
| 21075 | 53 | $3.29 | 53 A |
| 21029 | 48 | $2.89 | 54 A |
| 21045 | 39 | $3.60 | 51 A |
| 20759 | 37 | $3.05 | 54 A |
| 20794 | 29 | $3.76 | 50 B |
| 21046 | 26 | $3.00 | 54 A |
| 20777 | 11 | $3.18 | 53 A |
| 21738 | 11 | $3.35 | 52 A |
| 21794 | 7 | $2.70 | 55 A |
| 21036 | 6 | $2.95 | 54 A |
| 21737 | 6 | $2.25 | 57 A |
| 20763 | 3 | $3.30 | 52 A |
| 21723 | 2 | $2.63 | 55 A |
| 20701 | 1 | $5.37 | 42 C |