How Durham Handles Building Setbacks & Zoning: A Practical Guide

Durham maintains 119 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 Durham falls on the strict-to-permissive spectrum compared to other cities.

Structure Height Limits

Durham's Residential Suburban districts (RS-20, RS-10, RS-8 and RS-M) cap buildings at 3 stories and 40 feet under UDO Sec. 6.3.1.A. In the Suburban Tier, RS-20, RS-10 and RS-8 lots earn one extra story for every ten feet of added setback, never past 45 feet. RS-M projects reach 5 stories and 60 feet only with a minor special use permit.

Key details: Base limit, all four RS districts: 3 stories and 40 feet. Districts in the table: RS-20, RS-10, RS-8 and RS-M. Suburban Tier setback trade: One extra story per ten feet of additional setback. Suburban Tier ceiling (RS-20, RS-10, RS-8): 45 feet, no exceptions. RS-M with minor special use permit: Up to 5 stories, 60 feet maximum.

Section 6.3.1.A requires all residential development in the RS Districts to meet the table, so plans showing more than 3 stories or 40 feet, more than 45 feet in RS-20, RS-10 or RS-8 even after added setback, or more than 60 feet in RS-M even with the permit, fall outside the standards. RS-M projects need the Sec. 3.9 minor special use permit before they can count a fourth or fifth story. Sec. 6.3.1 prints no fine of its own.

Setback Rules

Durham's UDO Sec. 7.1.2.B sets minimum yards for a single-family detached house by zoning district: rear yards of 25 feet in every residential district, single side yards from 12 feet in RS-20 down to 5 feet in RS-M through RC, and street yards from 35 feet down to 10 feet. Sec. 7.1.2.C adds a small lot option with its own yards.

Key details: Rear yard, all seven districts: 25 feet (conventional subdivision). Single side yard: 12 feet RS-20; 10 RS-10; 9 RS-8; 5 in RS-M, RU-5, RU-M, RC. Street yard, collector or greater: 35 feet RS-20; 25 RS-10, RS-8, RS-M; 15 RU-5; 10 RU-M, RC. Minimum lot area, RS-20 to RC: 20,000, 10,000, 8,000, 5,000, 5,000, 3,500, 5,000 sq ft. Small lot option yards: 10 ft street, 5 ft side, 15 ft rear; 2,000 sq ft lot.

Sec. 7.1.2 prints no fine or penalty of its own, so enforcement comes through the rest of the UDO. What the section does control is whether a house fits the lot. A house built inside a required yard fails the district table, and an older house that no longer meets the numbers is treated as a nonconforming structure under Sec. 14.4. A small lot must be recorded on the plat with its housing type and limits, and it must carry one approved sustainable feature.

Lot Coverage Limits

Durham has no citywide lot-coverage cap, but land inside the city's six Watershed Protection Overlays -- a regime jointly adopted with Durham County -- is capped at 6% to 70% impervious surface. UDO Sec. 8.7.2 sets the exact limit by overlay district and by whether a project uses the Low Density or High Density Option.

Key details: Low Density Option range: 6% (M/LR-A) to 24% (F/J-B, E-B, E-A). High Density Option range: 24% to 70% (F/J-B, E-B highest). Governing section: UDO Sec. 8.7.2, Impervious Surface Limits. Adoption: Joint City of Durham / Durham County ordinance. Civil penalty: $500 per violation, UDO Sec. 15.4.4.

The Planning Director or designee enforces the impervious limits under UDO Article 15 and may issue a citation with a civil penalty of $500 per violation (Sec. 15.4.4). Notice must state the penalty amount and a 15-day payment deadline; unpaid penalties can be collected as a civil debt action. A violation that continues uncorrected after an initial citation can draw a second citation carrying a daily, cumulative civil penalty (Sec. 15.4.6), and payment of a penalty does not bar the City or County from also seeking injunctive relief or an abatement order for impervious surface built beyond the overlay's limit.

The Bottom Line

Durham'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 Durham is broadly strict or permissive.

This guide is based on Durham's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.