Can you build a duplex in Louisville, KY?
R-5A and R-6 appear to allow two-family or multifamily housing in at least some contexts, while R-4 and R-5 are more limited. Feasibility will depend heavily on exact zoning district, form district, and any overlay constraints.
Confidence: medium · Last researched May 2026
Dimensional standards in Louisville, KY
| R-4 / Traditional Neighborhood — Density | 4.84 du/ac max. Up to 6.05 du/ac using MRDI (Section 4.3.20) |
| R-4 / Traditional Neighborhood — Lot Area | 9,000 sq ft |
| R-4 / Traditional Neighborhood — Front Setback | 15' min., 25' max. |
| R-4 / Traditional Neighborhood — Side Street Setback | 15' min. |
| R-4 / Traditional Neighborhood — Side Setback | 5' min. |
| R-4 / Traditional Neighborhood — Rear Setback | 5' min. |
| R-4 / Neighborhood — Lot Area | 9,000 sq ft |
| R-4 / Neighborhood — Front Setback | 15' min. |
| R-4 / Neighborhood — Side Street Setback | 15' min. |
| R-4 / Neighborhood — Side Setback | 5' min. |
| R-4 / Neighborhood — Rear Setback | 25' min. |
| R-5 / Traditional Neighborhood — Density | 7.26 du/ac max. Up to 9.07 du/ac using MRDI (Section 4.3.20) |
| R-5 / Traditional Neighborhood — Lot Area | 6,000 sq ft |
| R-5 / Traditional Neighborhood — Front Setback | 15' min., 25' max. |
| R-5 / Traditional Neighborhood — Side Street Setback | 3' min. |
| R-5 / Traditional Neighborhood — Side Setback | 3' min. |
| R-5 / Traditional Neighborhood — Rear Setback | 5' min. |
| R-5 / Neighborhood — Lot Area | 6,000 sq ft |
| R-5 / Neighborhood — Front Setback | 15' min. |
| R-5 / Neighborhood — Side Street Setback | 15' min. |
| R-5 / Neighborhood — Side Setback | 5' min. |
| R-5 / Neighborhood — Rear Setback | 25' min. |
| R-5A / Traditional Neighborhood — Density | 12.01 du/ac max. |
| R-5A / Traditional Neighborhood — Lot Area | 4,500 sq ft |
| R-5A / Traditional Neighborhood — Front Setback | 15' min., 25' max. |
| R-5A / Traditional Neighborhood — Side Street Setback | 3' min. |
| R-5A / Traditional Neighborhood — Side Setback | 3' min.; 0' min. if attached |
| R-5A / Traditional Neighborhood — Rear Setback | 5' min. |
| R-5A / Neighborhood — Lot Area | 6,000 sq ft |
| R-5A / Neighborhood — Front Setback | 15' min. |
Related questions
Are ADUs allowed in Louisville, KY?
Accessory Dwelling Units are smaller, secondary residential units on the same lot as a main residence. Louisville states that two types of ADUs are allowed: attached to the main residence or detached as a separate structure.
What are the setback requirements in Louisville, KY?
Setbacks vary by district. Examples — R-4 / Traditional Neighborhood: 15' min., 25' max.; R-4 / Traditional Neighborhood: 15' min.; R-4 / Traditional Neighborhood: 5' min.; R-4 / Traditional Neighborhood: 5' min.. Always confirm the exact yard requirements for your district with Louisville, KY.
What is the minimum lot size in Louisville, KY?
Minimum lot size depends on the zoning district — R-4 / Traditional Neighborhood: 9,000 sq ft; R-4 / Neighborhood: 9,000 sq ft; R-5 / Traditional Neighborhood: 6,000 sq ft; R-5 / Neighborhood: 6,000 sq ft.
Full investor analysis
The full Louisville, KY 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 Louisville, KY report free →More about Louisville, KY zoning
- Can you build an ADU in Louisville, KY?→
- Are short-term rentals allowed in Louisville, KY?→
- Is mixed-use development allowed in Louisville, KY?→
- What are the setback requirements in Louisville, KY?→
- What are the parking requirements in Louisville, KY?→
This summary is AI-generated from public municipal sources and is not legal, engineering, or land-use advice. Always verify zoning with Louisville, KY officials before making decisions.
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