MD SB891

Counties and municipal corporations must adopt local laws by October 1, 2026 authorizing accessory dwelling units (ADUs) on properties with single-family detached homes as the primary dwelling

ADUs must be no greater than 75% of the size of the primary dwelling unit and may be either detached structures or attached additions to the main home

Local laws may not impose setback requirements exceeding existing accessory structure setbacks, and may establish additional off-street parking requirements only after completing a parking study with a waiver process

Deed restrictions, HOA bylaws, and other covenants cannot impose unreasonable limitations that prohibit ADU development, though restrictions on short-term rentals of ADUs remain permissible

HOA governing bodies may treat ADUs as separate lots for purposes of voting on association matters and levying assessments