Toensing Construction builds ADUs across Rhode Island, including detached units, in-law suites, garage conversions & basement apartments. Licensed & insured, they handle permitting, design & construction for multigenerational & flexible living spaces.
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Amex Construction is a Hanover-based design-build ADU contractor serving Massachusetts' South Shore. They manage detached ADUs, barn conversions, and basement suites, handling design, permitting, septic upgrades, and construction under one contract.
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Keane Construction & Remodeling, LLC offers expert ADU construction in Westport, MA, with 32 years of experience. Services include site evaluation, custom design, permitting, and full build of detached or attached accessory dwelling units across Bristol County.
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Regulus Construction is a licensed ADU contractor serving MetroWest Massachusetts. They build detached backyard cottages, garage conversions, and in-law suites, managing design, permitting, and construction across 40+ towns.
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Baystate Group Builders Inc offers residential remodeling services including basement finishing, bathroom renovations, deck construction, carpentry, and painting. Led by Victor, the team is known for professionalism, clear communication, and quality craftsmanship.
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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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J. B. Cote Construction is an ADU contractor in Rhode Island & Massachusetts, specializing in detached ADUs, garage conversions, in-law suites & more. They manage design, permitting, zoning & energy-efficient construction from start to finish.
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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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NE Tiny Homes is a full-service ADU builder across the US, offering custom tiny homes, garage conversions, and ADUs from 352 sq ft. Transparent pricing, permit handling, and move-in-ready builds for rental income or in-law suites.
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Salas Construction builds custom ADUs in Rhode Island, including attached, detached, and garage conversions. Projects range from $200K–$500K and take 6–12 months. Uses include rentals, guest suites, and multigenerational living.
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DiStefano Brothers Construction builds ADUs in Rhode Island, including internal, attached, and detached units. They navigate RI regulations: by-right approval, size limits, occupancy rules, and long-term rental requirements for compliant accessory dwelling units.
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Victory Construction Services Inc. builds ADUs in Rhode Island, including garage conversions, basement ADUs, and detached units. Family-owned since 2016, licensed, insured, with 15+ years experience and a 1-Year Workmanship Guarantee. Free estimates available.
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New London’s unique blend of historic charm and modern living makes it an ideal location for thoughtfully designed ADUs. The city’s zoning regulations have adapted to accommodate these versatile structures, making now the perfect time to consider adding one to your property.
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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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Newport, Rhode Island is renowned for its stunning Gilded Age mansions, colonial architecture, and vibrant coastal culture. As one of America's most historically significant cities, Newport presents unique challenges and opportunities for ADU contractors. Much of Newport falls under strict historic district regulations overseen by the Newport Historic District Commission (HDC), meaning that any accessory dwelling unit construction must carefully respect the city's architectural heritage. Working with an experienced ADU contractor in Newport, RI who understands these local nuances is absolutely essential for a successful project.
Newport's zoning ordinances govern where and how accessory dwelling units can be built. Under Rhode Island's statewide ADU legislation, municipalities are required to permit ADUs in areas zoned for single-family and multi-family use. Newport has aligned its local codes accordingly, but property owners must still navigate specific local requirements, including:
Because Newport's historic districts cover a significant portion of the city — including areas like the Point Neighborhood and Broadway — many homeowners will need HDC sign-off before breaking ground. Skilled Newport ADU contractors are well-versed in preparing the documentation and design plans required for HDC review.
Given Newport's dense, older housing stock and limited lot sizes, certain ADU types tend to be more practical than others in this coastal city. The most common options include:
Carriage house conversions are particularly popular in Newport, given the city's wealth of historic outbuildings. A qualified ADU contractor in Newport can help homeowners transform these structures into fully functional living spaces while maintaining their historic character.
Hiring a local ADU contractor familiar with Newport, Rhode Island is critical. Local professionals understand the city's permitting timelines, HDC processes, coastal construction considerations, and relationships with municipal departments. Newport's proximity to the ocean also means contractors must account for coastal building standards, including wind resistance and moisture management. A knowledgeable contractor will ensure your ADU is built to last in Newport's demanding coastal environment while maximizing your property's value and rental potential.