Quick answer: HB 1466 does not automatically legalize an old or unpermitted Maryland ADU, and it does not spell out a statewide rule for every ADU that existed before a new local ordinance. Maryland Department of Planning says HB 1466 is silent on existing ADUs and recommends that local governments recognize legally existing ADUs when … Read more
Quick answer: Maryland’s statewide ADU law does not waive building or fire-safety requirements. Maryland Department of Planning says state law requires residential fire sprinkler systems in newly constructed one- and two-family dwellings, which includes newly constructed ADUs. Existing-house conversions, garage conversions, manufactured homes and attached ADUs can follow different code paths, and local building departments … Read more
Chevy Chase View adopted Ordinance 105 in July 2026 to bring its ADU rules into compliance with Maryland law. The ordinance removes the old 15-ft/25-ft detached-ADU setbacks, uses ordinary accessory-building setbacks with height/length modifiers, removes the extra ADU parking requirement, and limits a detached ADU to no more than 75% of the principal dwelling’s floor area. See the Town and Montgomery County permit path before building.
The Town of Somerset requires its own ADU permit in addition to Montgomery County approvals. Current Town rules use height- and length-based accessory-building setbacks, a one-space ADU parking rule, rear-yard coverage limits and Town Council review. See how Town and County requirements interact before planning an ADU.
The Town of Chevy Chase adopted Ordinance 26-03 on July 8, 2026, effective August 7, revising ADU setbacks to match ordinary accessory-building rules and setting a 75% size limit. See interior/corner-lot setbacks, height/length increases, rear-yard coverage, nonconforming structures and the Town/Montgomery County permit split.
Garrett Park introduced Ordinance 2026-7 on September 14, 2026 to bring Town accessory-building and parking rules into compliance with Maryland’s ADU law. The Town declined an ADU traffic study, so the proposal avoids a special ADU parking requirement. See current 5-ft setbacks, privacy/lighting changes, the Sept. 28 adoption meeting and what homeowners should verify.
Laytonsville held a September 1, 2026 public hearing on Draft Ordinance 03-26 to bring its zoning code into compliance with Maryland’s ADU law. See what is confirmed, what the older zoning code says, how historic-district review fits in, and what homeowners should verify before planning an ADU.
Smithsburg’s current code defines accessory apartments as internal, attached or detached second dwellings and Maryland’s ADU inventory documents them in TR/TC with special-exception treatment in SR. See setback, height, parking, water-allocation and 2026 state-law issues to verify before building.
Sharpsburg’s current zoning ordinance says an accessory building does not include a separate detached living unit, while Town records show officials began working on HB 1466 ADU zoning amendments in 2025. See the 5-ft accessory-structure setback, current zoning baseline, and what homeowners should verify before planning an ADU.
Keedysville posted a September 18 notice for an October 7, 2026 public hearing on a zoning amendment to permit and regulate ADUs. See the Town’s current accessory-building setback and height rules, Maryland’s 75% standard, and what homeowners should verify before planning an ADU.
