Accessory Dwelling Unit (ADU) Text Amendments Under HB 1466
Carroll County
Summary
State law forced the county to allow ADUs on single-family lots by October 1, 2026. The board complied but raised the bedroom cap to three and kept HOA covenants intact. Guerin worries it will eventually spur lot subdivision fights.
At a glance
- Total mentions
- 11
- Last 30 days
- 0
Discussed at 1 meeting in the last 60 days; most recently Sep 17, 2026.
Impact analysis
Property owners may bear septic expansion costs; a 10,000-square-foot discharge area requirement is under statewide review.
Homeowners wanting rental income or housing for family members on their lot.
HOA residents concerned state law limits their associations' ability to restrict ADUs.
Mentions & discussions (11)
Board of County Commissioners Open Session - Sep 17, 2026
State law forced the county to allow ADUs on single-family lots by October 1, 2026. The board complied but raised the bedroom cap to three and kept HOA covenants intact. Guerin worries it will eventually spur lot subdivision fights.
Board of County Commissioners Public Hearing - Sep 3, 2026
The county must update its rules on accessory dwelling units — think in-law suites, garage apartments, or backyard cottages — to comply with state law. This could open more options for multigenerational living and rental income on existing lots.
Board of County Commissioners Open Session - Jul 30, 2026
Staff planned to ask the commissioners to schedule a public hearing on changes to county code chapters covering accessory dwelling units — the in-law suites and backyard cottages debate heading toward a formal hearing.
Carroll County Planning and Zoning Commission - Jul 8, 2026
The state's new HB 1466 law forces counties to allow accessory dwelling units, but commissioners worry ADUs could multiply homes on preserved farms where taxpayers paid to extinguish lot rights. They added a prohibition on ag-preserved properties and want a state legal answer.
Carroll County Planning and Zoning Commission - Jun 16, 2026
State law forces Carroll to allow ADUs nearly everywhere starting October 1. Commissioners worry the 75 percent size cap, parking, and — especially — agricultural preservation easements could be undercut, and want a letter pushing back on the state.
Carroll County Planning and Zoning Commission - Jun 3, 2026
The state is forcing every Maryland county to allow accessory dwelling units — in-law apartments, garage apartments, basement units — by October 1. Commissioners grumbled about the mandate, debated parking and size limits (75% of the primary home), and asked whether someone could plop a shipping container on a side lot. Final text comes back June 16.
Carroll County Planning and Zoning Commission - May 19, 2026
The county is rewriting its ADU code to comply with state legislation from HB 1466. Big questions on the table: how to calculate the 75% size limit, preventing ADUs from being carved off as separate lots, how HOAs interact with the rules, and what septic and well requirements apply on rural lots.
Carroll County Planning and Zoning Commission - May 6, 2026
The county needs to update its zoning text to comply with House Bill 1466, which affects where accessory dwelling units like in-law suites and garage apartments can be built. This could eventually expand housing options for homeowners across Carroll County.
Board of Education (BOE)/Board of County Commissioners (BCC) Joint Meeting - Apr 23, 2026
The county is moving a text amendment on accessory dwelling unit requirements and prohibitions — driven by state law HB 1466 — to the Planning Commission for review.
Carroll County Planning and Zoning Commission - Apr 21, 2026
New state laws on developer vesting (Housing Certainty Act) and a study on housing in commercial zones could preempt local control, and ADU requirements must be in local code by October 1. Commissioners expect fights next session.
Board of Zoning Appeals - Jan 27, 2026
The Board reaffirmed that accessory dwellings must be within 50 feet of the main house, rejecting a proposal to place one 290 feet away. The ruling signals the county treats that distance limit as a firm requirement, not a flexible guideline.
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