Boston ADUs add rental income ($1,500–$3,000/month), boost property value, and support multi-generational living. Boston ADU Builder offers detached, attached, garage, and basement conversions, handling design, permits, and construction in 8–12 months.
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ADU Building Systems LLC builds factory & site-built ADUs in Massachusetts, including detached, attached & converted units. Offering 10-year structural warranties, cost savings up to 50%, and full-service design to turnkey construction.
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Trusted Boston ADU builders specializing in attached, detached, and two-story accessory dwelling units. Stick-built construction ensures code compliance and lasting value. Services include design, permitting, and full project management for multigenerational living or rental income.
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ADUs are now legal statewide in Massachusetts. Atlantic Property Development builds custom Accessory Dwelling Units on the North Shore, offering design, permitting, and construction services for detached, attached, and garage conversion ADUs.
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KBR Remodeling & General Contractors builds ADUs in Rhode Island, including garage conversions, basement ADUs, in-law suites & detached guest houses. Family-owned since 1993, woman & veteran-owned, licensed & insured with 50 years experience.
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Luxe & Co. Accessory Dwellings is a Massachusetts ADU builder offering full-service design, construction, and permitting. Founded by Hope Beckman and Sage Conti, they specialize in high-end ADUs including in-law suites, carriage houses, and home offices.
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Spring Home Improvement offers expert ADU contractor services in Norfolk, MA. Family-owned since 2012, they handle design, permits, and construction with 10+ years of experience, transparent pricing, and a one-year labor warranty.
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13 Gables Inc, a licensed MA general contractor with 38+ years experience, builds custom ADUs including detached units, garage conversions & in-law suites. Massachusetts' 2025 Affordable Homes Act now allows ADUs by right in single-family zones.
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Pro's Edge Small Homes is a licensed ADU contractor in MA & NH with 20+ years experience. They offer turnkey design, permitting & modular construction of granny flats, in-law suites & backyard cottages, including a free property evaluation.
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BuildX is a premier ADU builder in Southeastern Massachusetts with 40+ years of experience and $450M+ in projects. Offering custom stick-built ADUs, a 100-day build guarantee, and transparent pricing starting from $254,540.
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The Backyard Homes line of ADUs are manufactured in over a dozen production facilities and available in 48 states. After being constructed in one of our modern plants the unit is delivered to the project site for the builder to install.
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Hawthorn Builders offers end-to-end ADU construction, managing consultation, design, permitting, and building. As a detached ADU and garage conversion contractor, they complete accessory dwelling units in ~90 days with minimal disruption.
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Rockhouse Construction builds ADUs across Rhode Island, including Providence, Warwick, and Cranston. Options include detached, attached, garage, and basement conversions. Costs range from $60,000 to $480,000+, varying by size and finish level.
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Bradford Construction Management brings commercial-grade project management to every ADU we build across the North Shore. That means daily photo documentation so you always know what's happening on site, transparent pricing so there are no budget surprises, and a clear schedule with real milestones.
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River City Construction is a Boston-based ADU contractor specializing in home additions, garage conversions, in-law suites & detached backyard cottages. They manage design, permitting & full construction under one roof.
read moreWestborough, Massachusetts is a vibrant town in Worcester County known for its rich history, strong tech industry presence, and well-preserved natural landscapes including the Westborough State Park and Lake Chauncy. As housing demand continues to grow in this desirable MetroWest community, many homeowners are turning to ADU contractors in Westborough, MA to add Accessory Dwelling Units to their properties. Whether you're looking to house aging parents, generate rental income, or add flexible living space, working with experienced local ADU contractors is essential to navigating Westborough's specific zoning and building requirements.
Before breaking ground, homeowners and ADU contractors in Westborough must carefully review the town's zoning bylaws. Westborough falls under Massachusetts General Law Chapter 40A, and the state's 2021 ADU legislation encourages municipalities to allow accessory dwelling units by right in single-family zones. However, local regulations still govern key aspects of ADU construction, including:
Skilled ADU builders in Westborough, Massachusetts are experienced in constructing several types of accessory dwelling units suited to the town's mix of colonial-style homes, newer subdivisions, and larger residential lots. Common ADU types include:
Hiring a local ADU contractor in Westborough, MA offers significant advantages over working with a general contractor unfamiliar with the area. Local professionals understand the town's permitting process through the Westborough Building Department, have established relationships with local inspectors, and are familiar with the soil conditions, climate considerations, and architectural styles common in the region. This local expertise helps keep your project on schedule and within budget.
When selecting an ADU construction company in Westborough, look for contractors who are fully licensed in Massachusetts, carry proper liability insurance, provide detailed written contracts, and have a proven portfolio of completed ADU projects in the MetroWest area. Investing in the right contractor ensures your ADU is built safely, legally, and to the highest quality standards.