Accessory Dwelling Units and State Law Compliance
Montgomery County
Summary
State law requires the county to allow ADUs broadly by October 2026. This ZTA allows ADUs in all zones, eases parking rules, and scraps outdated setback limits — but affordability remains a hurdle with construction costs now topping $250,000.
At a glance
- Total mentions
- 2
- Last 30 days
- 0
Last discussed Jul 27, 2026.
Impact analysis
No direct county cost from the ZTA itself, but members want a potential subsidy program since ADU construction runs $250,000-$300,000.
Homeowners who want to build rental or family units on their lots, and tenants seeking more housing options.
Some neighbors have objected to ADU proposals in single-family neighborhoods, as one speaker's contested permit shows.
Mentions & discussions (2)
PHP Committee Worksession - Jul 27, 2026
State law requires the county to allow ADUs broadly by October 2026. This ZTA allows ADUs in all zones, eases parking rules, and scraps outdated setback limits — but affordability remains a hurdle with construction costs now topping $250,000.
Council Session - Jun 9, 2026
The county is updating ADU rules to comply with 2025 state law — bigger units, more zones allowed — but speakers pressed the council to go further and kill the owner-occupancy requirement they say has stalled ADU production (only about 222 ADUs since 2019).
Related development
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