# Naperville R1A / R1 low-density residence standards | BV360 Pre-Flight

Naperville sets lot area, width, yards, and height for its R1A and R1 low-density single-family residence districts.

## Plain English

R1A requires at least 10,000 square feet per detached-house lot and 70 feet of lot width; R1 requires 13,000 square feet and 85 feet.
Both districts require a 30-foot front yard and 30-foot corner side yard. Interior side yards and rear yards vary by district and subdivision plat date.

## Numbers Pre-Flight checks

| Field | Value | Source |
| --- | --- | --- |
| R1A minimum lot area / width | 10,000 sq ft / 70 ft | Sec. 6-6A-5/6 |
| R1A front / interior side / corner side | 30 ft / 8 ft or 20 ft combined / 30 ft | Sec. 6-6A-7 |
| R1A rear yard | 25% of lot depth, need not exceed 30 ft | Sec. 6-6A-7 |
| R1A height | 2.5 stories / 35 ft maximum | Sec. 6-6A-8 |
| R1 minimum lot area / width | 13,000 sq ft / 85 ft | Sec. 6-6L-5/6 |
| R1 front / interior side / corner side | 30 ft / 25 ft combined, 10 ft each / 30 ft | Sec. 6-6L-7 |
| R1 rear yard | 25% of lot depth, need not exceed 35 ft | Sec. 6-6L-7 |
| R1 height | 2.5 stories / 35 ft maximum | Sec. 6-6L-8 |

Official source: City of Naperville Zoning Code · Chapter 6, Articles A and L (https://library.municode.com/il/naperville/codes/code_of_ordinances?nodeId=TIT6ZORE_CH6REDI). Effective / last checked: Current codified edition.

Pre-Flight is not a permit, not legal advice, and not a substitute for a licensed design professional or the authority having jurisdiction. The city still decides.