Maryland ADU planning starts here
Could an ADU work on your Maryland property?
Check the property questions that matter before paying for plans. Start with what you know and leave with a clearer list of what to verify.
A preliminary planning check, not a determination of eligibility or permit approval.
Not sure who reviews your address?
Find Who Reviews My Property →
Choose your next decision
What do you need to know?
Start with your property, or go straight to the part of planning you are working on.
From research to a project
Three steps before you commit.
Use the existing tools and guides to work through each decision in order.
- 01 · PROPERTY
Verify the starting point
Confirm who reviews the address and what remains unknown about the property.
Find the reviewing authority → - 02 · SCOPE & BUDGET
Shape a realistic plan
Work through size, placement, utilities and costs before choosing a build option.
Open the planning workspace → - 03 · TEAM & PERMITS
Prepare for the next conversation
Organize property records and questions for your local office and project team.
Open the permit checklist →
Explore local ADU rules
Already know your county?
Choose a county on the map, or use the selector for county, city and town guides.
A mailing city may differ from the zoning authority. Check your address with the Jurisdiction Finder.
Interactive county map
Explore Maryland by county
Choose “Show interactive map” to explore Maryland visually, or use the county selector to find local research.
Boundary geometry: Maryland iMAP / State Highway Administration / DoIT. Status colors follow the shared research records; each jurisdiction has its own review date.
Browse all county, city and town guides
Local rules. Clearer context.
Know what’s settled.
See what’s changing.
County and municipal responsibilities can differ. Our research shows what’s established, what’s changing, and what still needs confirmation.
Explore the Maryland Rules Tracker ↗Local research at a glance24 county-level guides + municipal carve-outs +
Each record has its own review date. Unverified means research is incomplete, not that ADUs are prohibited.
Ready for professional help?
Take your project
to the next conversation.
Already checked your jurisdiction, project type and major site constraints? You can submit a project request to our developing Maryland referral pilot.
The network is still being built. A request does not guarantee a match, quote, professional availability or permit approval. Review the consent and privacy details before submitting.
See how Project Help works →Or browse the Maryland professional directory →
Beyond the property checks
Plan for the life you want.
Closer to family.
Room to be yourself.
Explore how an ADU could fit into your family-care plan.
Explore family care ↗THE FINANCIAL PICTUREMake the numbers
work together.
Understand financing options alongside the full project budget.
Explore financing ↗THE RIGHT SUPPORTChoose your team
with confidence.
Know what to ask an architect before committing to design.
Plan your design team ↗Start with your property
Make your next
ADU decision clearer.
Preliminary planning guidance. Confirm property-specific requirements with the reviewing office.
Independent research. Practical guidance.
Created by Gijo John, Founder & Independent Researcher. We translate official Maryland sources into homeowner planning guidance—and label the gaps. We are an independent information resource, not a permitting agency, contractor or architectural firm.