Mesa Transect 4 Setback and Build-to Line Requirements
In the City of Mesa, the Transect 4 (T4) districts are divided into three distinct sub-zones: T4 Neighborhood (T4N), T4 Neighborhood Flex (T4NF), and T4 Main Street (T4MS). The T4N district requires a minimum front setback of 10 feet, while the T4NF and T4MS districts utilize Build-to Lines (BTL) that prioritize placing buildings close to the street, with T4MS requiring a maximum front build-to line of 0 feet. Side and rear setbacks in these Mesa districts vary from 0 to 5 feet depending on the specific sub-zone and the adjacency to other transect zones.
T4 Neighborhood (T4N) Setback Requirements
The T4 Neighborhood (T4N) district in the City of Mesa is intended to provide a high-quality, medium-density residential environment. This district uses traditional setbacks rather than Build-to Lines to maintain a specific neighborhood character [Section 11-58-5].
T4N Main Building and Accessory Structure Setbacks
| Standard | Main Building | Accessory Structure |
|---|---|---|
| Front Setback | 10' min.; 15' max. | 10' min. |
| Side Street Setback | 5' min.; 10' max. | 5' min. |
| Side Setback | 5' min. | 5' min. |
| Rear Setback | 5' min. | 5' min. |
T4 Neighborhood Flex (T4NF) Standards
The T4 Neighborhood Flex (T4NF) district in the City of Mesa provides a flexible area that can accommodate smaller, neighborhood-serving commercial uses in a main street form. This district transitions from traditional setbacks to the use of Build-to Lines (BTL) [Section 11-58-6].
T4NF Build-to Lines (BTL)
The Build-to Line is the specific line where the building façade must be placed [Section 11-64-3].
| Frontage Type | Build-to Line (Distance from Property Line/ROW) |
|---|---|
| Front | 0' min.; 15' max. |
| Side Street | 0' min.; 15' max. |
T4NF Side and Rear Setbacks
| Standard | Requirement |
|---|---|
| Side (Main Building) | 0' min. |
| Rear (Main Building) - Adjacent to T5N, T4N, or T3N | 5' min. |
| Rear (Main Building) - Adjacent to All Other Transect Zones | 0' min. |
| Rear (Main Building) - Adjacent to Alley | 0' min. |
| Side (Accessory Structure) | 0' min. |
| Rear (Accessory Structure) | 5' min. |
T4 Main Street (T4MS) Standards
The T4 Main Street (T4MS) district in the City of Mesa is designed to integrate vibrant main-street commercial and retail environments into neighborhoods. It requires the most restrictive placement of buildings to the property line to encourage a walkable urban form [Section 11-58-7].
T4MS Build-to Lines (BTL)
| Frontage Type | Build-to Line (Distance from Property Line/ROW) |
|---|---|
| Front | 0' max. |
| Side Street | 0' max. |
T4MS Side and Rear Setbacks
| Standard | Requirement |
|---|---|
| Side (Main Building) | 0' min. |
| Rear (Main Building) - Adjacent to T5N, T4N, or T3N | 5' min. |
| Rear (Main Building) - Adjacent to All Other Transect Zones | 0' min. |
| Rear (Main Building) - Adjacent to Alley | 0' min. |
| Side (Accessory Structure) | 0' min. |
| Rear (Accessory Structure) | 5' min. |
Special Placement Rules for Transect 4
In the City of Mesa, several unique rules apply to the placement of buildings within Transect 4 zones:
- Encroachments: Specific elements like porches, stoops, and balconies are allowed to encroach into the required setbacks or BTL zones up to specified limits (e.g., 10 feet for front porches in T4N) [Section 11-58-5(E)].
- Adjacency to RS Districts: When a lot in a Transect district is adjacent to a Single Residence (RS) district, additional setbacks or screening may be required to ensure compatibility between different intensities of use [Section 11-58-12].
- Accessory Dwelling Units (ADU): ADUs must follow the specific placement standards found in the City of Mesa's supplemental regulations for accessory uses [Section 11-31-3].
Sections Cited
- 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 11-58-12: Additional Standards for All Transect Zones
- Section 11-64-3: Definitions of Specialized Terms and Phrases (Build-to Line)
- Section 11-31-3: Accessory Dwelling Unit