08/03/2026
🏡 Interested in Building an ADU in Andover, Massachusetts?
An Accessory Dwelling Unit can create valuable additional living space while helping homeowners prepare for changing family, housing, and financial needs.
An ADU can be used as:
âś… Housing for aging parents
âś… A private space for adult children
âś… A long-term rental unit
âś… A guest suite
âś… A multigenerational living arrangement
✅ An investment in your property’s future
Andover currently allows qualifying ADUs by right in zoning districts where single-family residences are permitted, subject to the Town’s zoning bylaw, site-plan review process, building requirements, setbacks, parking rules, and other applicable regulations. The protected ADU size is generally limited to 900 square feet or 50% of the principal dwelling’s gross floor area, whichever is smaller.
The approval process may involve:
âś… An initial property and zoning review
âś… Preparation of a site plan
âś… Architectural and building plans
âś… ADU site-plan review
âś… Building, electrical, plumbing, and mechanical permits
âś… Construction inspections
âś… Final approval and Certificate of Occupancy
At SAS Contracting & Development, we help coordinate the entire project—from the first property evaluation through permitting, engineering, construction, and final inspections.
Before beginning an ADU project, the property should be reviewed for zoning compliance, setbacks, lot coverage, parking, utilities, wetlands, septic or sewer capacity, and access requirements.
📍 Serving Andover and surrounding communities
📞 603-401-8282
đź“§ [email protected]
Let’s turn your ADU idea into a well-planned, professionally constructed addition to your property.