Mesa Transect 4 Zoning: T4N, T4NF, and T4MS Land Use Guide

The Transect 4 (T4) zoning categories in the City of Mesa are designed to foster walkable, medium-density environments that blend residential living with neighborhood-serving commercial activities. While the T4N Neighborhood zone is predominantly residential, the T4NF Neighborhood Flex and T4MS Main Street designations allow for an increasing intensity of mixed-use development, including retail, office, and specialized service uses often restricted to upper floors or the rear of buildings to preserve the pedestrian-oriented streetscape.

Overview of Transect 4 Designations in Mesa

The City of Mesa identifies three distinct sub-zones within the Transect 4 category, each with a specific intent for the urban fabric:

• T4N (Transect 4: Neighborhood): Intended to provide a walkable, medium-density residential environment. It supports building types such as townhouses, courtyard housing, mansion apartments, duplexes, and fourplexes within walking distance of transit and commercial areas [Section 11-58-5].
• T4NF (Transect 4: Neighborhood Flex): Designed to provide a flexible area that can accommodate smaller, neighborhood-serving commercial uses in a "main street" form. This allows for interim uses such as live/work units and ground-floor residential until the commercial corridor fully matures [Section 11-58-6].
• T4MS (Transect 4: Main Street): Focused on integrating vibrant main-street commercial and retail environments directly into neighborhoods. It provides access to daily amenities within walking distance and serves as a focal point for the community [Section 11-58-7].

Residential Use Classifications

Residential permissions are broadly consistent across the T4 zones in the City of Mesa, emphasizing multi-unit and attached housing forms.

Residential Use	T4N	T4NF	T4MS	Additional Regulations
Single-Unit Residence	P	P	P	[Table 11-58-3.A]
Multi-Unit Residence	P	P	P	[Table 11-58-3.A]
Accessory Dwelling Unit	P	P	P	[Section 11-31-3]
Community Residence (Family/Transitional)	P	P	P	[Section 11-31-14]
Boarding House	—	SUP	SUP	[Table 11-58-3.A]
Home Occupation (Main Bldg ≤300 sf)	P	P	P	[Section 11-31-33]
Home Occupation (Main Bldg >300 sf)	SUP	SUP	AUP	[Section 11-31-33]

Key: P = Permitted; SUP = Special Use Permit; AUP = Administrative Use Permit; — = Prohibited.

Recreation, Education, and Public Assembly Uses

Civic and recreational uses in the City of Mesa Transect 4 districts are scaled to serve the immediate neighborhood.

Use Classification	T4N	T4NF	T4MS	Notes
Civic Space	P	P	P	See Civic Space Standards [Section 11-62]
Library or Museum (≤5,000 sf)	P	P	P	[Table 11-58-3.A]
Library or Museum (>5,000 sf)	CUP	CUP	CUP	[Table 11-58-3.A]
Meeting Facility (≤5,000 sf)	P	P	AUP/P	AUP/P indicates ground floor restrictions [2]
Place of Worship (≤5,000 sf)	P	P	AUP/P	AUP/P indicates ground floor restrictions [2]
Schools, Colleges, & Trade (Public)	P	P	P	[Table 11-58-3.A]
K-12 School (Private)	P	P	CUP	[Table 11-58-3.A]
Commercial Recreation (Small, Indoor)	—	P	P	[Table 11-58-3.A]
Health/Fitness Facility (≤3,000 sf)	—	AUP/P	AUP/P	AUP/P indicates ground floor restrictions [2]

Notes: [2] Allowed only on upper floor(s) or behind an allowed ground floor use [Section 11-58-3].

Commercial and Retail Use Classifications

Commercial uses are most restricted in the T4N district and become more common in the T4NF and T4MS districts.

Commercial Use	T4N	T4NF	T4MS	Additional Regulations
General Retail	—	—	P	[Table 11-58-3.A]
Restaurant (Full/Limited Service)	—	—	P	[Table 11-58-3.A]
Bar, Club, or Lounge	—	—	CUP	[Table 11-58-3.A]
Bank / Financial Services	—	—	P	[Table 11-58-3.A]
Personal Services	—	—	P	[Table 11-58-3.A]
Business Support Services	—	—	AUP	[Table 11-58-3.A]
Tattoo and Body Piercing	—	—	P	[Table 11-58-3.A]
Pawn Shop	—	—	CUP	[Table 11-58-3.A]
Medical/Dental Office (≤5,000 sf)	P	P	P	[Table 11-58-3.A]
Veterinary Services	—	—	P	[Table 11-58-3.A]
Bed and Breakfast	P	P	P	[Section 11-31-8]

Prohibited Uses in Transect 4 Zones

The City of Mesa specifically prohibits certain intensive or industrial-scale uses within the T4N, T4NF, and T4MS districts to maintain their neighborhood character. Prohibited uses include:

• Industrial and Manufacturing: Most industrial uses, including general manufacturing and heavy industrial processes, are prohibited [Table 11-58-3.A].
• Auto-Oriented Services: Drive-thru facilities and pick-up window facilities are generally prohibited in T4 zones unless specifically permitted through a distinct permit or as part of a larger mixed-use project [Table 11-58-3.A].
• Large-Scale Retail: Individual retail stores exceeding 10,000 square feet are generally inappropriate for the T4 scale unless otherwise specified in an approved regulating plan [Section 11-31-16].
• Heavy Transportation: Freight/truck terminals and major utility installations are not permitted [Table 11-58-3.A].

Allowed Building Types

In the City of Mesa, "use" is also defined by the form of the building. The following building types are permitted within the Transect 4 zones:

1. Carriage House: A secondary structure at the rear of a lot [Section 11-59-3].
2. Single-Unit House (Village and Cottage): Detached structures on various lot sizes [Section 11-59-4, 11-59-5].
3. Bungalow Court: A series of small detached structures arranged around a shared court [Section 11-59-6].
4. Duplex: A structure containing two side-by-side or stacked units [Section 11-59-7].
5. Townhouse: A small-to-medium sized attached structure [Section 11-59-8].
6. Mansion Apartment: A medium-sized structure consisting of 3 to 6 units that resembles a large house [Section 11-59-9].
7. Apartment House: A medium-to-large structure with 7 to 12 units [Section 11-59-10].
8. Courtyard Building: A grouping of structures oriented around a central courtyard [Section 11-59-11].
9. Main Street Mixed-Use: A building type (primarily for T4NF and T4MS) that integrates ground-floor commercial with upper-floor residential or office [Section 11-59-12].
10. Mid-Rise: A structure typically 3 to 5 stories tall (in T4) with mixed uses [Section 11-59-13].

Sections Cited

• Section 11-31-3: Accessory Dwelling Unit
• Section 11-31-8: Bed and Breakfast Inns
• Section 11-31-14: Community Residences
• Section 11-31-16: Large Commercial Development
• Section 11-31-33: Home Occupations
• Section 11-58-3: Land Use Regulations (Transect Zones)
• Table 11-58-3.A: Composite Use Table
• Section 11-58-5: T4 Neighborhood (T4N) Standards
• Section 11-58-6: T4 Neighborhood Flex (T4NF) Standards
• Section 11-58-7: T4 Main Street (T4MS) Standards
• Section 11-59: Building Type Standards
• Section 11-62: Civic Space Standards
• Chapter 64: Definitions