Updated
Solar in Montgomery County, MD is permitted through the county's eSolar program, which uses SolarAPP+ for residential rooftop systems and pairs a building permit with a separate electrical permit. Standard Maryland SRECs traded near $40 in 2026, so county systems are sized mainly for bill savings rather than certificate income.
How permits work in Montgomery County
The county's Department of Permitting Services runs eSolar for residential rooftop solar. It takes plans checked through SolarAPP+ and issues the building permit for the panel attachment quickly, while the electrical permit for the connection is filed separately.
Two details catch people out. Townhouses four stories and taller are treated as commercial structures and go through the commercial solar permit, and ground arrays fall outside the rooftop fast lane. We file the right path for your house from the start.
Sources: montgomerycountymd.gov
What a system earns on this side of the line
Standard Maryland SRECs traded near $40 in 2026, and the compliance payment that caps them steps down from $45 per MWh in 2026 to $22.50 by 2030. That is a fraction of DC certificate values, so we size county systems to your usage and treat certificates as a bonus.
Maryland lets counties offer property tax credits for buildings with solar, and Montgomery County is among those that adopted one. Rules and amounts change, so we check the current terms with you before the design is final.
Sources: energysage.com, energy.maryland.gov
A county that already knows solar
In 2021, about 8,400 of Montgomery County's more than 300,000 homes had rooftop solar. That means many county houses now have systems old enough to need inverter replacements, repairs, roof work around the panels or a battery added.
We take those service calls on any installer's system, from monitoring reconnects to remove-and-reinstall for a new roof.
Sources: new.wtop.com
Where Montgomery County jobs usually start
Pick the job closest to yours; each page explains the work in detail.
Montgomery County solar questions
Yes. A building permit for the attachment and a separate electrical permit for the connection.
Townhouses four stories and taller go through the commercial solar permit instead.
Yes, but expect far less than DC. Standard Maryland SRECs traded near $40 in 2026.
Montgomery County has adopted one under Maryland law. We confirm current terms before design.
Yes, from repairs and inverters to removal for roof work.