Orleans ADU Regulations
Current zoning bylaws, requirements, and permit process for Accessory Dwelling Units in Orleans, Massachusetts. Last updated: October 2025.
Please Note: This information is provided for general informational purposes only and should not be considered legal or professional advice. ADU regulations are subject to change, and individual circumstances may vary. We strongly recommend verifying all requirements, zoning bylaws, and permit procedures directly with the Town of Orleans Building Department or Planning Board before beginning any planning or construction activities. Town officials can provide the most current regulations and guidance specific to your property and project.
Bullet Point Summary
- Maximum Size: 1200 sq.ft.
- Owner Occupancy Required: Previously required year-round owner occupancy, but this conflicts with state law and is now unenforceable
- Number of ADUs Permitted: One per property
- Attached vs. Detached: Both allowed
- Parking Requirements: Subject to state limits (max 1 space)
- Design Requirements: Additions cannot increase lot coverage by more than 2% of lot area
- Septic/Title 5 Requirements: Health Department must determine adequate septic capacity for both units
- Rental Restrictions: If rented, must be for periods not less than 90 days; all rentals must be registered with Town
- Special Incentives: Lower Cape Housing and ADU Resource Center provides technical assistance; Housing Assistance Corporation runs "My Home Plus One ADU Program"
- Application Process: Building permit; register rentals through Town permit portal
Additional Information
For the most up-to-date and complete regulations, please contact the Orleans Building Department or visit the town's official website.
Our ADU specialists can help you navigate Orleans's specific requirements and design an ADU that meets all local regulations while maximizing your property's potential.