Mesa Transect 4 Zoning: T4N, T4NF, and T4MS Districts
The Transect 4 (T4) districts in the City of Mesa are designed to facilitate medium-density, walkable urban environments that balance residential living with neighborhood-serving commercial activities. These districts, which include T4 Neighborhood (T4N), T4 Neighborhood Flex (T4NF), and T4 Main Street (T4MS), utilize form-based regulations to ensure buildings contribute to a cohesive streetscape while maintaining proximity to transit and local amenities [Section 11-56-1].
General Character and Purpose
The T4 districts within the City of Mesa serve as a transition between lower-density residential areas and more intense urban cores. The primary objective is to create an environment where daily needs can be met within a short walk or transit trip [Section 11-63-4].
T4 Neighborhood (T4N)
The T4N district is intended to provide a walkable, predominantly residential neighborhood. It integrates building types such as duplexes, townhouses, and small courtyard housing into a fabric that is consistent with single-family scales but offers higher density. The City of Mesa uses this district to support a variety of housing options within walking distance of transit and commercial hubs [Section 11-58-4(A)].
T4 Neighborhood Flex (T4NF)
The T4NF district provides a flexible area that can accommodate smaller, neighborhood-serving commercial uses in a "main street" form. In the City of Mesa, this district allows for interim uses, such as live/work units and ground-floor residential, until the commercial viability of a corridor fully matures [Section 11-58-6(A)].
T4 Main Street (T4MS)
The T4MS district is the most commercially vibrant of the T4 group. It is designed to integrate retail and service environments directly into neighborhoods. The City of Mesa utilizes T4MS to provide day-to-day amenities, create potential for transit stops, and serve as a focal point for the surrounding community [Section 11-58-7(A)].
Permitted Land Uses
Land use in the T4 districts is governed by the Composite Use Table, which distinguishes between the residential focus of T4N and the commercial flexibility of T4NF and T4MS [Section 11-58-3.A].
| Land Use Category | T4N | T4NF | T4MS |
|---|---|---|---|
| Residential | |||
| Single-Unit Residence | Permitted | — | — |
| Multi-Unit Residence | Permitted | Permitted | Permitted |
| Accessory Dwelling Unit | Permitted | Permitted | Permitted |
| Commercial/Retail | |||
| General Retail (Small/Indoor) | — | Permitted | Permitted |
| Restaurant (Full Service) | — | Permitted | Permitted |
| Medical/Dental Office | — | Permitted | Permitted |
| Bank/Financial Services | — | Permitted | Permitted |
| Public/Civic | |||
| Civic Space | Permitted | Permitted | Permitted |
| Library or Museum | Permitted | Permitted | Permitted |
| Place of Worship (≤5,000 sf) | Permitted | Permitted | Permitted |
Building Form and Placement Standards
The City of Mesa regulates the T4 districts primarily through building form and placement rather than just use. Each sub-district has specific requirements for how a building must relate to the street [Section 11-58-3].
Building Placement and Setbacks
| Standard | T4N | T4NF | T4MS |
|---|---|---|---|
| Front Setback/BTL | 15' min; 25' max | 0' min; 15' max | 0' max (BTL) |
| Side Street Setback | 10' min; 20' max | 0' min; 15' max | 0' max (BTL) |
| Side Setback | 5' min | 0' min | 0' min |
| Rear Setback | 30' min | 5' min | 0' min |
Building Height and Massing
| Standard | T4N | T4NF | T4MS |
|---|---|---|---|
| Maximum Height | 2 Stories | 3—4 Stories | 4 Stories |
| Minimum Height | — | — | 2 Stories |
| Building Width | 48' max | 100' max | 150' max |
| Ground Floor Ceiling | 10' min | 10' min | 14' min (Commercial) |
Parking and Accessory Standards
To maintain the pedestrian-oriented character of the T4 districts, the City of Mesa mandates strict parking placement and design standards [Section 11-58-12].
- Parking Placement: In all T4 districts, parking spaces must be located behind the building's façade or in a secondary side yard. Parking may never be placed between the front of the building and the street [Section 11-58-12(E)].
- On-Street Credit: On-street parking spaces adjacent to the lot or parcel may be counted toward the minimum required off-street parking for the development [Section 11-58-12(D)].
- Access: Parking access should ideally be provided from an alley. If no alley exists, a single shared drive is encouraged to minimize curb cuts along the street [Section 11-58-12(E)].
- Building Elements: Entries must be clearly defined and shaded. In T4MS and T4NF, ground-floor transparency (windows) must be provided for at least 50% to 75% of the building wall area to create an engaging pedestrian environment [Section 11-60-9].
Sections Cited
- Section 11-3-1: Districts Established
- Section 11-56-1: Purpose (Form-Based Code)
- Section 11-58-3: Land Use Regulations
- Section 11-58-4: T3 Neighborhood (T3N) Standards
- Section 11-58-6: T4 Neighborhood Flex (T4NF) Standards
- Section 11-58-7: T4 Main Street (T4MS) Standards
- Section 11-58-12: Additional Standards for All Transect Zones
- Section 11-60-9: Shopfront
- Section 11-63-4: Pedestrian Sheds