How Cary Handles Building Setbacks & Zoning: A Practical Guide

Cary maintains 106 local ordinances across all categories, and 3 of those deal specifically with building setbacks & zoning. Here is a breakdown of what the city actually requires, what is prohibited, and where Cary falls on the strict-to-permissive spectrum compared to other cities.

Lot Coverage Limits

In the Town of Cary's Jordan Lake Watershed overlay, low-density projects cap impervious surface at 24% of project area, rising to 36% for projects with streets built without curbs and gutters.

Key details: Jordan Lake cap (low density): 24% impervious surface. No curb/gutter streets: Up to 36% impervious. Applies only in: Mapped Watershed Protection Overlay. Alternative measure: 2 dwelling units per acre.

Exceeding the mapped impervious-surface limit is grounds for the Town to deny or withhold development plan approval, and can trigger stormwater enforcement and required corrective measures under LDO § 4.4.6.

Structure Height Limits

Cary's Land Development Ordinance caps residential building height at 35 feet across the R-80 through R-8 and TR districts under Table 6.1-1, with a one-foot bonus for each extra foot of setback beyond the minimum.

Key details: Base height limit: 35 feet. Bonus: +1 ft height per +1 ft setback. Telecom towers allowed up to: 350 ft. Governing table: LDO Table 6.1-1.

Building above the district height limit without qualifying for a setback-based increase draws Cary's standard civil penalty schedule under LDO § 11.5.1(C): $100 for the first day of violation, rising to $400 per day for continuing violations.

Setback Rules

Cary's Land Development Ordinance sets minimum front, side, and rear building setbacks by zoning district in Table 6.1-1; a structure cannot be built, used, or occupied unless it meets its own district's setback minimums.

Key details: R-20 side setback: 10 feet. R-20 rear setback: 25 feet. R-20 front (thoroughfare) setback: 50 feet. Governing table: LDO Table 6.1-1.

Violating a district's setback minimum draws Cary's standard escalating civil penalty under LDO § 11.5.1(C): $100 for the first day of violation, $200 the second day, $300 the third day, and $400 for each day after.

The Bottom Line

Cary's building setbacks & zoning rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Cary is broadly strict or permissive.

Keep in mind that Cary can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.