Complete Guide to ADUs in Massachusetts: Design, Building & Cost Considerations

Accessory Dwelling Units (ADUs) are transforming residential neighborhoods across Massachusetts. Whether you’re looking to maximize property value, provide housing for family, or generate rental income, an ADU offers flexibility and modern living solutions.
What is an ADU?
An ADU is a self-contained living space on your property—a separate entrance, kitchen, bathroom, and sleeping area. Common types include detached cottages, garage conversions, basement apartments, and accessory structures.
Massachusetts ADU Benefits
- Property Value: Increase home value by 20-30% with an ADU
- Rental Income: Generate passive income in tight Massachusetts housing markets
- Multigenerational Living: House aging parents or adult children independently
- Community Impact: Increase housing supply in limited markets
Design & Planning Considerations
Massachusetts ADU projects require careful coordination with local zoning regulations, setback requirements, permitting processes, utility connections, and architectural consistency with your primary residence.
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Building an ADU: The Design-Build Process
Professional ADU contractor Massachusetts firms handle every phase—from feasibility studies and permits to construction and final inspection. This integrated approach ensures your ADU is completed on schedule, on budget, and to code.
Ready to add an ADU to your property? Work with experienced design-build contractors who specialize in Massachusetts ADU projects to turn your vision into reality with transparent pricing and daily progress updates.



