Converting your garage into an Accessory Dwelling Unit (ADU) in Minneapolis is not only possible, it’s a practical way to add livable space, increase your property value, and even generate rental income. The City of Minneapolis allows garage conversions to ADUs, provided the project meets zoning, permitting, and building code requirements. With the right planning, professional support, and attention to detail, your garage can be transformed into a safe, comfortable, and fully legal living space.
What is an ADU?
An Accessory Dwelling Unit is a smaller, secondary residential unit on the same property as a single-family home. For garages, this typically means either converting an existing detached garage into living space or adding a dwelling above the garage.
Zoning Requirements
ADUs are permitted across most Minneapolis residential zones, but each project must comply with rules for setbacks, height, and square footage. For example, detached ADUs often can’t exceed a percentage of the main home’s size, and there are limits on total lot coverage.
Permitting and Codes
Before breaking ground, you’ll need permits for building, plumbing, electrical, and mechanical systems. Minneapolis building codes also require proper insulation, fire separation between living and garage spaces, safe exits, and adequate utilities.
Preliminary Planning & Feasibility
Assessing the Existing Garage
Start by evaluating whether your garage is structurally sound. Look at the foundation, framing, and roof. Many garages will require reinforcement to handle new loads, especially if you’re adding a second floor.
Survey and Documentation
A certified property survey can help identify setbacks, easements, and utility lines that affect your project. This step ensures your design is feasible from both a legal and technical standpoint.
Budgeting and Costs
Garage conversions vary widely in cost, depending on whether you’re building within the existing structure or adding on. Factor in construction, permits, design fees, and utility upgrades. Also consider financing options or incentives.
Hiring Professionals
Because ADUs must meet strict codes, it’s best to involve an architect or designer early. You may also need a structural engineer and an experienced contractor familiar with Minneapolis ADU projects.
Design Considerations
Space Planning
Garages tend to be compact, so efficient layouts are key. Most garage ADUs include a bedroom, a small kitchen, a living area, and a bathroom. Maximizing daylight with windows and ensuring proper ventilation make the space feel more livable.
Structural Modifications
Depending on the age of your garage, you may need to reinforce the slab, walls, or roof. If you’re adding a unit above the garage, the existing foundation must be able to support it.
Utilities and Systems
The ADU will need heating, cooling, plumbing, and electrical service. Some utilities can connect to the main house, while others may require separate meters or panels.
Safety and Code Compliance
Expect to add fire-rated walls and doors, smoke and carbon monoxide alarms, and at least one egress window or door for safety.
Aesthetics and Integration
Your ADU should complement the main house’s architecture. Using similar siding, rooflines, and finishes helps the new unit blend seamlessly into the property.
The Permitting Process
Preparing Your Application
Permits require detailed construction drawings, a site plan, and mechanical layouts. Submitting a complete package reduces delays.
City Review and Approval
Minneapolis reviewers will check your plans against zoning and building codes. You may need to revise your drawings before approval.
Fees and Inspections
Permit fees vary, and inspections are required at several stages — framing, plumbing, electrical, and final completion — before the ADU can be occupied.
Construction Steps
- Site Prep and Demolition – Remove garage doors and any non-structural elements.
- Framing and Structural Work – Reinforce the structure or add new walls and floors.
- Exterior Updates – Install windows, doors, siding, and roofing.
- Rough-In Utilities – Complete plumbing, electrical, and HVAC work.
- Interior Finishes – Add insulation, drywall, paint, flooring, cabinetry, and fixtures.
- Final Connections and Testing – Hook up utilities, test systems, and install safety equipment.
- Inspections and Occupancy – After passing final inspection, you’ll receive a certificate of occupancy.
Common Challenges
- Underestimating costs of structural upgrades.
- Discovering insufficient utility capacity for a new unit.
- Facing delays in permitting or inspections.
- Running into zoning setbacks or height restrictions.
Planning ahead and working with professionals helps avoid these pitfalls.
Convert your Garage into an ADU Today!
Converting your garage into an ADU in Minneapolis is a rewarding way to add functional living space, increase your property’s value, and even create rental income. The process requires careful planning, compliance with local regulations, and experienced construction.
If you’re ready to explore a garage-to-ADU conversion, Stonehearth Remodeling can guide you every step of the way. Contact Stoneheart Remodeling today to ensure your project is smooth, compliant, and beautifully built!
