Carroll County, MD Solar Energy: Panel Permits (2026)
Key Facts
- Accessory use cap
- 200% of principal use's electric consumption
- Ground setback
- 100 feet from property lines, no variance
- Residential building buffer
- 150 feet minimum
- Ground-mounted height
- 15 feet maximum
- Site plan trigger
- over 5,000 sq ft ground-mounted
- Excluded district
- Historic District (accessory use)
Summary
Carroll County allows rooftop and yard solar arrays as an accessory use by right in every zoning district except the Historic District, capped at 200% of the property's electric consumption. Ground-mounted systems over 5,000 square feet trigger a full Chapter 155 site plan review, and setbacks run 100 feet from property lines with no variances allowed.
(A) Purpose. The intent of this section is to provide for the safe, effective, and efficient utilization of solar energy generating systems while protecting the rights, health, safety and welfare of adjoining land uses and landowners through appropriate zoning and land use controls. (B) Roof-mounted accessory use systems. Solar energy generating systems shall be an accessory use when the facility generates electricity in an amount that does not exceed 200% of the electric consumption of the principal use... (E) Solar energy generating systems, development process. ... (3) All ground-mounted solar energy generating systems, including associated buildings and access roads, that cover more than 5,000 square feet of area shall be subject to Chapter 155, Development and Subdivision of Land, including § 155.050 Site Plan Requirements.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-15: Supplement contains: Local legislation current through July 30, 2026).
Full Breakdown
153(B) and (C), roof- and ground-mounted solar energy generating systems qualify as an accessory use, and are permitted in every zoning district except Historic, as long as output stays at or below 200% of the principal use's electric consumption. Residential and Conservation District ground-mounted arrays are size-capped by lot size (120 square feet on lots up to half an acre, rising to the aggregate roof area on lots over three acres), and no variance to that size or setback is allowed in the Residential Districts.
153(D)-(F): they are a permitted use up to 5 megawatts in nearly every district, but systems over 5 megawatts are barred from Residential and most Commercial Districts and from Designated Growth Areas entirely. ' Ground-mounted structures cannot exceed 15 feet in height, and glare must be mitigated with glare-reduction technology plus a certified glare hazard analysis. 050. Systems with a development plan accepted for review before November 1, 2024 are grandfathered to the older rules.
Violations & Fines
Violations of the county zoning chapter, including unpermitted solar installations, are punished under § 158.999: a general fine of up to $1,000 per Md. Code, Land Use Article, with each day a violation continues counted as a separate offense. The chapter also sets a civil penalty schedule of $50 for a first offense, $100 for a second, $200 for a third, and $500 for each subsequent offense, plus the possibility that an unpaid abatement cost is added to the property's tax bill.
Frequently Asked Questions
Do I need a permit for rooftop solar panels in Carroll County?
How far must a ground-mounted solar array sit from my property line?
When does a solar project need county site plan review?
Sources & Official References
Other rules in Carroll County
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