Rockville, MD Solar Energy: Panel Permits (2026)
Key Facts
- Max height (most zones)
- 20 ft. for freestanding solar
- I-L/I-H zones
- height up to zone limit
- Exceeding I-L height
- Special Exception required
- Rooftop home solar
- excluded from this use category
- Glare
- must be minimized, all zones
Summary
Rockville zoning treats ground-mounted solar as a Renewable Energy System, capping freestanding units at 20 feet in most zones and requiring Special Exception approval to build taller in the I-L zone.
Renewable Energy System means free-standing, ground-mounted equipment
necessary for the on-site generation and use of energy from renewable energy sources.
Zoning Ordinance - City of Rockville, MD 131 This use does not include solar canopies over parking facilities, Electric Vehicle
Charging, or any systems or structures accessory to individual dwelling units.
(b) Use standards. In all zones, the following standards apply:
(1) Glare. Renewable Energy Systems must minimize glare.
(c) Conditional use standards.
(1) In the RMD-15, RMD-25, RHD, all MXTD zones, MXCD, MXCT, MXNC, MXC, MXE, and
MXB zones, and the Park zone, the following additional standards apply:
A. Renewable Energy Systems must be accessory to a principal use.
B. Height.
1. The maximum height for freestanding solar systems is 20 feet.
2. The maximum height for freestanding wind systems is 50 feet or the height
allowed in the zone, whichever is greater.
(2) In the I-L and I-H zones, height up to the height allowed in the zone is allowed without
a Special Exception approval.
(d) Special Exception use standards. In the I-L zone, Renewable Energy Systems in excess of the
height allowed in the zone may be permitted by the Board of Appeals under Article 4,
Full Breakdown
The City of Rockville Zoning Ordinance regulates freestanding, ground-mounted solar equipment as a 'Renewable Energy System': a use category that explicitly excludes systems accessory to individual dwelling units, so most rooftop residential solar panels fall outside this section entirely. In the RMD-15, RMD-25, RHD, MXTD, MXCD, MXCT, MXNC, MXC, MXE, and MXB zones and the Park zone, freestanding solar systems are capped at 20 feet in height and must be accessory to a principal use. In the I-L and I-H industrial zones, height is allowed up to whatever the zone otherwise permits; taller systems in I-L require Special Exception approval from the Board of Appeals under Article 4, Division 4.3. Glare must be minimized in every zone.
Violations & Fines
Installing a freestanding solar system above the 20-foot cap outside the I-L zone, or without required Special Exception approval where one applies, is a zoning violation subject to enforcement action.
Frequently Asked Questions
Does Rockville's Renewable Energy System zoning rule apply to rooftop solar panels on a house?
How tall can a freestanding solar array be in Rockville?
Sources & Official References
Other rules in Rockville
Compare Rockville to another location·View the Maryland solar energy overview
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