Setback Requirements for the MU-3(SAH) District in Dallas
In the City of Dallas, the MU-3(SAH): Mixed Use District 3 Affordable requires a minimum front yard setback of 15 feet, which increases by an additional 20 feet for any portion of a structure exceeding 45 feet in height. Side and rear yard setbacks for the MU-3(SAH) district are generally not required unless the property sits adjacent to or directly across an alley from specific residential districts, in which case a 20-foot minimum applies. Furthermore, the City of Dallas mandates additional tower spacing for tall structures in this district to ensure adequate light and air [Section 51A-4.125].
Front Yard Setbacks
The City of Dallas establishes two distinct layers for front yard setbacks within the MU-3(SAH): Mixed Use District 3 Affordable. The base requirement ensures a consistent streetscape, while the "urban form setback" is designed to prevent a "canyon effect" created by tall buildings.
- Minimum Base Setback: All structures in the MU-3(SAH) district must be set back at least 15 feet from the front property line [Section 51A-4.125(f)(4)(A)(i)].
- Urban Form Setback: For any portion of a building that exceeds 45 feet in height, an additional 20-foot setback is required. This means the total front yard setback for the portion of the building above 45 feet is 35 feet [Section 51A-4.125(f)(4)(A)(ii)].
Side and Rear Yard Setbacks
The side and rear yard requirements in the City of Dallas MU-3(SAH) district are highly dependent on the zoning of neighboring properties.
- Adjacent to Residential: If a lot in the MU-3(SAH) district is adjacent to or directly across an alley from an R, R(A), D, D(A), TH, TH(A), CH, MF, or MF(A) district, a minimum side and rear yard of 20 feet is required [Section 51A-4.125(f)(4)(B)(i)(aa)].
- Other Cases: In all other instances, there is no minimum side or rear yard requirement for the MU-3(SAH) district [Section 51A-4.125(f)(4)(B)(i)(bb)].
- Tower Spacing: To accommodate high-density development, the City of Dallas requires an additional side and rear yard setback of one foot for every two feet in height above 45 feet. This applies only to the portion of the structure exceeding that height, and the total required setback under this rule does not need to exceed 30 feet [Section 51A-4.125(f)(4)(B)(ii)].
Summary Table of MU-3(SAH) Setbacks
| Setback Type | Requirement | Applicability/Conditions |
|---|---|---|
| Front Yard (Base) | 15 Feet | Minimum for all structures [Section 51A-4.125(f)(4)(A)(i)] |
| Front Yard (Urban Form) | + 20 Feet | Required for portions of structures over 45 feet in height [Section 51A-4.125(f)(4)(A)(ii)] |
| Side/Rear Yard (Residential Adjacency) | 20 Feet | Required if adjacent to/across an alley from R, D, TH, CH, or MF districts [Section 51A-4.125(f)(4)(B)(i)] |
| Side/Rear Yard (General) | None | In all other cases [Section 51A-4.125(f)(4)(B)(i)] |
| Tower Spacing (Side/Rear) | 1:2 Ratio | 1 foot of additional setback for every 2 feet of height above 45 feet (Max 30 feet total) [Section 51A-4.125(f)(4)(B)(ii)] |
Sections Cited
- Section 51A-4.125. Mixed Use Districts.