Can you build a duplex in St. Paul, MN?
RT2 and multifamily districts allow small multifamily forms, but lots under 9,000 square feet cannot host new three-plus-unit multifamily under the provided dimensional summary, and site plan review may apply depending on unit count and project type.
Confidence: medium · Last researched May 2026
Dimensional standards in St. Paul, MN
| RL — minimum lot area | 21,780 square feet |
| RL — minimum front setback | 30 feet |
| RL — minimum side setback | 10 feet |
| RL — minimum rear setback | 25 feet |
| R1 — minimum lot area | 9,600 square feet |
| R1 — minimum front setback | 30 feet |
| R1 — minimum side setback | 10 feet |
| R1 — minimum rear setback | 25 feet |
| R2 — minimum lot area | 7,200 square feet |
| R2 — minimum front setback | 25 feet |
| R2 — minimum side setback | 8 feet |
| R2 — minimum rear setback | 25 feet |
| R3 — minimum lot area | 6,000 square feet |
| R3 — minimum front setback | 25 feet |
| R3 — minimum side setback | 6 feet |
| R3 — minimum rear setback | 25 feet |
| R4 — minimum lot area | 5,000 square feet |
| R4 — minimum front setback | 25 feet |
| R4 — minimum side setback | 4 feet |
| R4 — minimum rear setback | 25 feet |
| RT1 — minimum lot area | 3,000 square feet |
| RT1 — minimum front setback | 25 feet |
| RT1 — minimum side setback | 9 feet |
| RT1 — minimum rear setback | 25 feet |
| RT2 — minimum lot area | 2,500 square feet |
| RT2 — minimum front setback | 25 feet |
| RT2 — minimum side setback | 9 feet |
| RT2 — minimum rear setback | 25 feet |
| RM1 — minimum lot area per unit | 2,000 square feet |
| RM1 — minimum front setback | 25 feet |
Related questions
Are ADUs allowed in St. Paul, MN?
ADUs are secondary dwelling units associated with a principal one-family dwelling and may be within, attached to, or detached from that dwelling on the same zoning lot.
What are the setback requirements in St. Paul, MN?
Setbacks vary by district. Examples — RL: 30 feet; RL: 10 feet; RL: 25 feet; R1: 30 feet. Always confirm the exact yard requirements for your district with St. Paul, MN.
What is the minimum lot size in St. Paul, MN?
Minimum lot size depends on the zoning district — RL: 21,780 square feet; RL: 80 feet; R1: 9,600 square feet; R1: 80 feet.
Full investor analysis
The full St. Paul, MN report breaks down duplex and 2–4 unit feasibility by district, the approval path, and the density/dimensional limits that decide whether the numbers work. First town report is free.
Get the full St. Paul, MN report free →More about St. Paul, MN zoning
- Can you build an ADU in St. Paul, MN?→
- Are short-term rentals allowed in St. Paul, MN?→
- Is mixed-use development allowed in St. Paul, MN?→
- What are the setback requirements in St. Paul, MN?→
This summary is AI-generated from public municipal sources and is not legal, engineering, or land-use advice. Always verify zoning with St. Paul, MN officials before making decisions.
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