Montgomery County’s updated ADU zoning took effect October 5, 2026 under Ordinance 20-36 (ZTA 26-06). Review the 75% size standard, parking, setbacks and licensing, while keeping pending Bill 41-26 separate.
Howard County’s CB 3-2026 is effective. Learn the 75% exterior-footprint size rule, owner-occupancy requirement, short-term-rental ban, $25 application and the parking issue homeowners should verify before designing.
Maryland HB 1466 limits HOA restrictions on ADUs but does not eliminate HOA authority. Learn what counts as an unreasonable limitation, what HOAs may still regulate, and how voting and assessments work.
A primary-source guide to Maryland HB 1466: ADU size, local approval, setbacks, parking, HOA rules, utilities, property taxes and real homeowner questions ahead of the October 1, 2026 local-law deadline.
