Complete 2026 cost breakdown: construction, permits, financing, and expected rental ROI.
Calculate your Minneapolis ADU cost →Building an ADU in Minneapolis costs between $150,000-$465,000 for new construction, with per-square-foot costs averaging $180-$550. These figures include design, permitting, site preparation, and construction. The most affordable option is a garage conversion at $95,000-$185,000, while prefab/modular ADUs fall in between at $150,000-$350,000.
| Cost Category | Estimated Range |
|---|---|
| Architectural Plans | $3,000 – $15,000 |
| Permits & Fees | $325 zoning application, plus a valuation-based building permit: about $3,200-$5,400 on $150,000-$300,000 of work (permit fee + 65% plan-review fee + 0.05% state surcharge, 2026 schedule). Plumbing, mechanical and electrical permits are separate. |
| Impact Fees | No city impact fee: the building permit fee schedule lists only the permit fee, 65% plan review and the 0.05% state surcharge. A Metropolitan Council sewer availability charge (SAC) may apply to a new dwelling unit; confirm the current rate with Development Review. |
| Site Prep & Foundation | $10,000 – $35,000 |
| Framing & Structure | $15,000 – $45,000 |
| Plumbing | $8,000 – $20,000 |
| Electrical | $5,000 – $15,000 |
| HVAC | $3,000 – $8,000 |
| Interior Finishes | $15,000 – $40,000 |
Quotes for the same ADU commonly vary 20–40% between builders. We pass your request to up to 5 local builders serving Minneapolis, where we have them — free, no obligation.
Get Minneapolis builder quotes →Permit fees in Minneapolis are $325 zoning application, plus a valuation-based building permit: about $3,200-$5,400 on $150,000-$300,000 of work (permit fee + 65% plan-review fee + 0.05% state surcharge, 2026 schedule). Plumbing, mechanical and electrical permits are separate.. The review timeline is City target: 15 business days for the initial building-plan review and 5 business days per resubmittal; zoning staff send any incompleteness letter within 15 business days. No end-to-end time is published., with plan check: 15 business days for the initial review, 5 business days for each resubmittal (city permit application process page). Impact fees are No city impact fee: the building permit fee schedule lists only the permit fee, 65% plan review and the 0.05% state surcharge. A Metropolitan Council sewer availability charge (SAC) may apply to a new dwelling unit; confirm the current rate with Development Review.. Pre-approved plans: None published. The city offers a detached-ADU code-requirements handout (Dec. 2024), not stock plans; drawings must meet the 2020 Minnesota Residential Code..
| 1-Bedroom Rent | $1,250-$1,700/month |
| 2-Bedroom Rent | $1,700-$2,300/month |
| Annual Rental Income (est.) | $17,700/year |
| Payback Period (est.) | 17.4 years |
| Short-Term Rental | Yes, with a license: stays of 30 days or less need a City short-term rental license (occupancy capped at 10; an owner may hold only one non-homestead STR license besides their home). |
| Overall ROI Estimate | 5-8% gross rental yield on a $250,000-$400,000 detached ADU renting at $1,500-$2,300/mo, before taxes, vacancy, insurance and financing; a $95,000-$220,000 garage or basement conversion renting at $1,250-$1,700/mo return. |
A typical ADU in Minneapolis generates approximately $17,700 per year in rental income based on average 1-bedroom rents. At an average construction cost of $307,500, the estimated payback period is 17.4 years — before accounting for the resale value the ADU adds, which an appraiser determines from comparable sales in Minneapolis and varies by market (often less than build cost).
1. Garage conversions save 40-60% vs new construction since the shell already exists. Average cost in Minneapolis: $95,000-$185,000.
2. Prefab/modular ADUs offer predictable pricing and faster timelines. Average: $150,000-$350,000.
3. Pre-approved plans — Minneapolis does not offer a pre-approved/standard ADU plan program yet, so budget for custom architectural plans (typically $3,000-$15,000). See which cities offer pre-approved ADU plans.
4. State grants — California's CalHFA ADU grant (up to $40K) is currently paused; check calhfa.ca.gov/adu for status and your state for active programs.
5. Get multiple bids — ADU contractor pricing varies 20-40% for the same project. We recommend getting at least 3 quotes.
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