16 Best ADU Builders in Warwick, Rhode Island

Verified ADU contractors and builders in Warwick, RI

Showing 116 of 16 listings

All Phases Construction

We specialize in building accessory dwelling units for Rhode Island homeowners looking to expand their property's potential, whether through new construction or creative conversions in the Warwick area. Our team handles every phase of ADU development to maximize your home's value and functionality.

+1 401-402-9229
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buildPROS

We specialize in ADU construction and conversions throughout Warwick and the surrounding Rhode Island area, helping homeowners add secondary dwelling units to their properties. From planning to completion, we handle every aspect of building accessory units that maximize your home's potential.

+1 401-639-4423
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Couto Construction

Transform your underutilized garage into a functional living space with expert conversion services in Warwick, RI. From design to completion, our experienced team specializes in converting garages into bedrooms, home offices, or recreation areas that add value to your home.

+1 401-420-7248
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Exterior Innovations LLC

Transform your underutilized garage into a functional living space with expert conversion services in Warwick, RI. From design to completion, we specialize in converting garages into bedrooms, home offices, and recreational areas tailored to your needs.

+1 401-787-3050
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Garage Headquarters

Transform your underutilized garage into functional living space with expert conversion services in Warwick, RI. Our specialized team handles every aspect of garage-to-living-space conversions, from structural modifications to finishing touches that maximize your home's potential.

+1 877-624-2724
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JOE Garage Door Repair

Transform your garage into functional living space with expert conversion services in Warwick, RI, specializing in garage-to-room renovations that maximize your home's square footage. From design through completion, we handle all aspects of converting your garage into bedrooms, offices, studios, or recreation areas.

+1 401-468-0009
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McCormick Home Improvement

Specializing in accessory dwelling unit construction throughout Warwick, we help Rhode Island homeowners add valuable living space to their properties with expert ADU design and building services. From initial planning through final completion, our team handles every aspect of creating a functional, code-compliant secondary residence on your land.

+1 401-463-7674
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New Wave Construction

Specializing in accessory dwelling unit construction throughout Warwick, Rhode Island, this contractor transforms properties by building ADUs that maximize your home's potential and create valuable rental or multigenerational living spaces. From initial design consultation through final permitting and construction, they deliver quality ADU solutions tailored to your property and budget.

+1 508-965-3472
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R.E. Coogan Heating Inc

Transform your unused garage into a functional living space with expert conversion services in Warwick, RI, specializing in garage-to-living-space renovations that maximize your home's usable square footage.

+1 401-732-6562
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Rhode Island Renovations, LLC

Transform your Rhode Island garage into functional living space with expert conversion services tailored to Warwick homes. Our team specializes in converting garages into bedrooms, offices, recreational rooms, and more while maintaining quality craftsmanship and local building compliance.

+1 401-739-7331
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RI Construction

Transform your underutilized garage into functional living space with expert garage-to-bedroom and workshop conversions throughout Warwick. We specialize in seamless garage renovations that maximize your home's usable square footage while maintaining structural integrity and local building codes.

+1 401-274-2507
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RIHI The Home Improvement Specialist

Transform your underutilized garage into a functional living space with expert conversion services in the Warwick area. Whether you're looking to add a bedroom, home office, or recreation room, this specialist brings professional expertise to maximize your home's potential.

+1 800-474-4493
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Salas Construction

Enhance your property with a custom-designed attached or detached ADU. We specialize in designing and constructing custom ADUs that seamlessly integrate with your primary home, enhancing its value and equity.

(401) 217-9007
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Spagnolo Homes

Specializing in accessory dwelling unit construction throughout Warwick and Rhode Island, this builder helps homeowners maximize their property value by creating additional living spaces for rental income or multigenerational families. From design through completion, they deliver quality ADU builds tailored to local regulations and your home's unique layout.

+1 401-965-7245
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SuperbGarageDoor'sRepair

Transform your Warwick garage into functional living space with expert conversion services that maximize your home's potential. Our experienced team specializes in professional garage-to-living-space renovations, handling everything from structural modifications to finishing touches.

+1 401-593-1633
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United Home Experts of Rhode Island

Specializing in accessory dwelling unit construction throughout Rhode Island, this Warwick-based contractor transforms properties by building ADUs that maximize your land's potential and create valuable rental or multi-generational living spaces. Whether you're looking to add a detached cottage, convert existing structures, or construct a new in-law suite, they bring expert design and building expertise to every project.

+1 401-593-0101
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Frequently Asked Questions — ADU Builders in Warwick

How much does it cost to hire an ADU builder in Warwick?

ADU construction costs in Warwick, Rhode Island vary widely depending on size, type, and site conditions. Detached ADUs typically range from $150,000–$400,000+, while garage conversions and attached ADUs can be more affordable. Contact multiple builders in Warwick to get accurate quotes for your specific project.

How long does it take to build an ADU in Warwick?

In Warwick, the ADU construction timeline typically ranges from 6 to 18 months from permit application to move-in. Permitting alone can take 2–6 months depending on Rhode Island local regulations. Prefab and modular ADUs often have faster timelines than site-built units.

Do I need a permit to build an ADU in Warwick?

Yes, a building permit is required for ADU construction in Warwick, Rhode Island. Your ADU builder will typically handle the permit application as part of their service. Rhode Island has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.

What types of ADUs can be built in Warwick?

Common ADU types in Warwick include detached ADUs (backyard cottages), attached ADUs, garage conversions, basement conversions, and prefab/modular ADUs. The best type for your property depends on lot size, zoning, and budget. A local Warwick ADU builder can advise on what's allowed on your specific parcel.