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ADU Construction · Queen Anne's County, Maryland
Permit required
In Maryland, a ADU Construction requires a building permit.
An accessory dwelling unit (ADU) always requires a building permit because it adds a habitable dwelling, including electrical, plumbing, mechanical permits and egress/zoning review. Plans are reviewed under the Statewide + local code (IRC 2021); apply through Queen Anne's County - Department Of Planning & Zoning before work begins.
Source: Statewide + local, IRC 2021 · Verified 2026 by StateDataIndex
Building an Accessory Dwelling Unit requires complex zoning, structural, and utility permits.
With a growing population of around 51,825 residents, Queen Anne's County maintains a relatively streamlined permitting process compared to major urban hubs. Processing typically takes 1 to 3 weeks.
Code Compliance & Inspections
Work on your ADU Construction in Queen Anne's County will be inspected to ensure full compliance with the current Maryland Building Performance Standards.
Local Zoning & Setbacks in Queen Anne's County
Regardless of the state permit rule above, Queen Anne's County still enforces property-line setbacks and local zoning for your ADU Construction. A permanent foundation or any electrical/plumbing hookup can also change what is required, so confirm with Queen Anne's County - Department Of Planning & Zoning before building.
Zoning & Cost Factors
Maryland integrates local zoning with state-level "Smart Growth" initiatives, heavily restricting sprawl and protecting the Chesapeake Bay watershed. Fortunately, Maryland maintains relatively builder-friendly regulations, keeping base permit fees competitive.
Estimated municipal base fee: $383–$585
This is a planning estimate only — actual fees in Queen Anne's County depend on your project valuation. A typical breakdown looks roughly like:
- Application Fee: ~$135
- Plan Review Fee: ~$90
- Inspection Fee: ~$225
Always confirm exact fees with your local building department before applying.
Cost Comparison: Queen Anne's County vs State Average
State Average Base Fee
Queen Anne's County Estimated Base Fee
*Chart represents median application base fees and does not include project valuation percentages.
Queen Anne's County Building Department
Office: Queen Anne's County - Department Of Planning & Zoning
Address: 110 Vincit St #104, Centreville, MD 21617, USA
Phone: (410) 758-1255
Source: official Queen Anne's County government records. Hours and procedures can change — call ahead to confirm.
How to Apply in Queen Anne's County
In Queen Anne's County, you or your contractor typically submit blueprints and a property survey to the local building department. Call ahead to confirm hours and accepted payment methods.
ADU Construction Requirements in Queen Anne's County
Typical Submittal Package
When applying for a ADU Construction permit, you or your contractor will generally need to submit the following documentation for the city's review:
- Comprehensive architectural and structural plans
- Foundation engineering reports
- Sewer, water, and utility connection plans
- Site plan showing property lines and setbacks
Standard Ordinances & Processing Time
Key code points for a ADU Construction in Queen Anne's County: ADUs typically have maximum square footage limits (often 800-1200 sq ft), height restrictions, and usually require dedicated off-street parking depending on local zoning.
Estimated processing time in Queen Anne's County: 10 to 14 business days.
Frequently Asked Questions
What happens if I build a ADU Construction without a permit in Queen Anne's County?
Building without authorization is considered a code violation. The local government can issue a Stop Work Order, forcing you to halt construction immediately. You may be subject to retroactive permit fees (often double the original cost), daily fines, or even a mandate to tear down the unpermitted work at your own expense.
Can a homeowner pull their own ADU Construction permit in Maryland?
Yes. Maryland generally allows property owners to act as their own general contractor under an Owner-Builder exemption. If you take this route, you assume full legal and financial liability and must ensure all work complies with the Maryland Building Performance Standards.
How much does a ADU Construction permit cost in Queen Anne's County?
As a planning estimate, base municipal fees for a ADU Construction permit in Queen Anne's County typically fall between $383 and $585. The final amount depends on your project valuation, so confirm the exact figure with the local building department.
How long does it take to get a ADU Construction permit in Queen Anne's County?
Based on the size of Queen Anne's County, the typical processing time is 10 to 14 business days. Times vary with the season and the building department application volume.
Where do I apply for a ADU Construction permit in Queen Anne's County?
You can apply through the Queen Anne's County - Department Of Planning & Zoning or online via the county permit portal. For questions, call (410) 758-1255.
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Read GuideBuilding It Yourself? Here's What You'll Need
Planning an ADU? Tools homeowners use in the design and layout phase:
📘
Backyard ADU Design Guide (Book)
View on Amazon →
📐
Laser Level
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🔍
Franklin ProSensor Stud Finder
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📏
25ft Tape Measure
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Other Permit Types in Queen Anne's County
Planning another home improvement project? Check the requirements and fees for:
Nearby Jurisdictions in Maryland
Building near the county line? Check requirements for neighboring areas: