Zoning Guide

Tucson Setbacks & Height Limits — Residential Zones

Last updated: Verified:

Fact-checked against Tucson's current UDC implementation after Ordinance No. 12219 became effective January 1, 2026.

Tucson's residential dimensional standards changed materially on January 1, 2026. Older summaries that use the pre-2026 side/rear setback formula should not be treated as current.

Current R-1 Residential Setbacks

City zoning-review comments applying Ordinance No. 12219 in 2026 confirm the current R-1 pattern for ordinary residential interior lots:

Standard Current R-1
Front street setback 20 ft
Side-street setback on a corner lot 10 ft
Interior side setback 5 ft
Rear setback 5 ft

The previous page used 6-ft interior sides, a 20-ft side-street setback, and a 15–20-ft rear range. Those values were based on older UDC standards and are stale after Ordinance No. 12219.

Current City review comments explicitly instruct applicants to revise older 6-ft side/rear dimensions to 5 ft.

R-2 Example

Current 2026 City review materials for R-2 identify:

  • minimum lot size: 4,000 sq ft in the cited current review;
  • maximum height: 25 ft;
  • front street yard: 20 ft;
  • residential side/rear perimeter yard: 5 ft.

Use the current UDC table for the exact project because use type, middle housing, overlays, and site conditions can change the applicable standards.

Lot Coverage

Current City review comments show that lot-coverage calculations and limits depend on district and use. Do not reuse a generic 40–50% estimate across Tucson residential zoning.

For example, a 2026 R-1 review identified a project lot coverage of 38%, while R-2 standards cited by the City allow substantially different maximum coverage depending on the residential use.

ADUs and Arizona State Law

The previous page was directionally correct that Arizona state law affects Tucson ADUs. A.R.S. §9-461.18 requires covered municipalities to allow specified attached and detached ADUs and limits local parking, design, setback, height, lot-size, coverage, and frontage restrictions.

Tucson amended its ADU regulations in response to HB 2720, and those local provisions must be read together with current state law.

Other Overlays and Relief

Historic Preservation Zones, Airport Environs, Hillside Development, Scenic Corridor, urban overlays, and other mapped controls can modify the base result.

Tucson also uses the Design Development Option process for qualifying requests to modify specified setback and height standards.

How to Check a Property

  1. Confirm the exact zoning district and overlays.
  2. Use the current UDC and amendments effective in 2026.
  3. Do not rely on pre-2026 6-ft / height-based residential side-yard summaries.
  4. Check the proposed use: single-family, middle housing, multifamily, or ADU.
  5. Confirm parcel-specific conditions with PDSD before design or permitting.

Official Sources

This guide is informational only. The current UDC, amendments, overlays, and state law control.

More about Tucson Zoning

ADU Rules & RegulationsBuilding Permits — Cost & Timeline

Sources

  1. Tucson Unified Development Code (UDC)·codelibrary.amlegal.com·Accessed 2026-04-14·Direct link
  2. Tucson Code of Ordinances (Municode)·library.municode.com·Accessed 2026-04-14·Direct link
  3. City of Tucson Planning and Development Services Department·tucsonaz.gov·Accessed 2026-04-14·Direct link

FAQ

What are the setback requirements in Tucson?
Setbacks in Tucson vary by zoning district under the Unified Development Code (UDC). For typical single-family residential zones like R-1, expect a front setback around 20 ft, interior side setbacks around 6 ft, and a rear setback around 15-20 ft. Suburban Ranch (SR) and lower-density zones require larger setbacks. Always verify your specific zone on the Tucson zoning map.
What is the maximum building height in Tucson residential zones?
Maximum building height in Tucson residential zones is typically 25-30 ft under the UDC, measured from average grade to the highest point of the roof. Hillside, airport, and scenic corridor overlays can lower this limit. Multi-family zones such as R-3 allow up to about 40 ft.
How is lot coverage calculated in Tucson?
Lot coverage is the percentage of the lot covered by buildings and other structures. Residential zones in Tucson typically allow around 40-50% coverage depending on the district. Driveways and uncovered patios are generally excluded — check the UDC definition for your specific zone.
Does Tucson use FAR for residential zones?
Tucson's UDC relies primarily on setbacks, height, and lot coverage rather than Floor Area Ratio (FAR) for most residential districts. FAR is more commonly used in mixed-use and downtown zones. Check your specific zone chapter in the UDC for applicable standards.