Rhode Island ADU Contractor
We design and build ADUs across Rhode Island, including in-law suites, garage conversions, backyard cottages, and carriage house conversions. One team managing your project from permits to final walkthrough.
Get a Free EstimateRhode Island ADUs
Rhode Island's 2023 ADU legislation made it easier than ever for homeowners to add a second living unit to their property. Whether you want space for aging parents, adult children, rental income, or a dedicated guest suite, an ADU can be a smart, long-term investment.
Toensing Construction handles the full ADU process, from early design conversations and permit navigation through construction and final inspections. We have experience working with Rhode Island's zoning requirements and can help you understand what is feasible on your specific property.
Every ADU project starts with an honest conversation about what you want to accomplish, what your property allows, and what the realistic costs and timeline look like.
ADU Types
The right ADU type depends on your property, your goals, and your budget. Here are the options we most commonly work with in Rhode Island.
A self-contained unit added to or carved out of an existing home, ideal for multigenerational living with a connected but private space.
Converting an attached or detached garage into a livable unit, often one of the most cost-effective ADU options available.
A fully separate structure on your property, offering maximum privacy for both the homeowner and the ADU occupant.
Restoring and converting historic carriage houses into modern living spaces, common in Newport and East Bay historic neighborhoods.
Converting an unfinished or underused basement into a legal ADU with proper egress, insulation, and finished living space.
Adding a living unit above an existing garage, maximizing vertical space on a property without expanding the footprint.
How It Works
Every ADU project is different, but the process follows a clear path. Here is what working with Toensing Construction looks like from first call to final walkthrough.
We start with a free on-site conversation about your property, your goals, and what Rhode Island zoning allows. No pressure, no commitment. Just honest information so you can make the right decision.
We work with you and your designer to develop plans that meet Rhode Island building codes and local zoning requirements, then manage the permit process from application through approval.
Before breaking ground, we walk through a detailed scope of work, timeline, and budget together. We set clear expectations so there are no surprises once the project starts.
Our crew handles the build from foundation to finishes. You have a direct point of contact throughout and receive regular updates on progress, timeline, and any decisions that need your input.
We walk through the finished unit together, address any remaining items, and make sure everything meets your expectations before we close out the project.
Common Questions
Yes. All ADU construction in Rhode Island requires building permits from your local municipality. The permitting process typically involves zoning review, plan approval, and inspections at various stages of construction. Toensing Construction manages the permit coordination as part of your project.
ADU costs vary based on type, size, and existing conditions on your property. Garage conversions and basement conversions tend to be more cost-effective since the structure already exists. New detached cottages typically involve higher costs. We provide a detailed estimate after visiting your property and understanding your goals.
Timeline depends on the ADU type and local permitting. A garage conversion can often be completed in a few months. A new detached structure typically takes longer once you factor in design, permitting, and construction. We give you a realistic timeline at the start and keep you updated throughout.
Rhode Island's 2023 ADU legislation established statewide standards that require municipalities to allow ADUs on most single-family lots. Individual towns may have additional rules affecting size, setbacks, and lot coverage. We review your specific property and local zoning before the project begins so you know exactly what is allowed on your lot.
In most Rhode Island municipalities, yes. Rhode Island's ADU law was designed in part to expand housing options, and rental use is generally permitted. Rules around short-term rentals may vary by town. We recommend confirming your intended use with your local zoning office before the project starts.
Potentially, yes. Historic homes involve additional considerations, including approvals from local historic district commissions and exterior design standards. Toensing Construction has experience working on historic properties across Rhode Island, and we can help you navigate the process while protecting the character of your home.
We manage the full construction process, including permits, subcontractors, and inspections. For architectural drawings, we can coordinate with local architects and designers we trust, or work alongside an architect you already have a relationship with. Our goal is to be your single point of contact from start to finish.
Start Your ADU Project
Start with a free consultation. We will talk through your property, your goals, and what the process looks like in Rhode Island. No pressure, no obligation. Just an honest conversation about what is possible.
We build ADUs and accessory dwelling units for homeowners throughout Rhode Island, from in-law suites to backyard cottages.