Setback Requirements for the LO-3 Limited Office District in Dallas
In the City of Dallas, the LO-3: Limited office district 3 requires a standard minimum front yard setback of 15 feet. Side and rear yard setbacks are generally not required (0 feet) unless the property is adjacent to or directly across an alley from a residential district, in which case a 20-foot minimum setback is mandatory. For structures exceeding 45 feet in height, additional "Urban Form" and "Tower Spacing" setbacks are required for both the front and side/rear yards.
LO-3 District Setback Standards Table
The following table outlines the specific yard requirements for the LO-3 District as established by the Dallas Development Code. Note that these regulations control in the event of any conflict with general yard regulations found in Division 51A-4.400 [Section 51A-4.121(b)(4)].
| Setback Type | Minimum Requirement | Conditions and Supplemental Rules |
|---|---|---|
| Front Yard (Base) | 15 feet | Standard minimum for all building sites [Section 51A-4.121(b)(4)(A)(i)]. |
| Urban Form (Front) | +20 feet | Additional setback required for any portion of a structure over 45 feet in height [Section 51A-4.121(b)(4)(A)(ii)]. |
| Side Yard (Residential Adjacency) | 20 feet | Required when adjacent to or across an alley from R, R(A), D, D(A), TH, TH(A), CH, MF, or MF(A) districts [Section 51A-4.121(b)(4)(B)(i)(aa)]. |
| Side Yard (Standard) | No minimum | Default requirement for all other cases [Section 51A-4.121(b)(4)(B)(i)(bb)]. |
| Rear Yard (Residential Adjacency) | 20 feet | Required when adjacent to or across an alley from R, R(A), D, D(A), TH, TH(A), CH, MF, or MF(A) districts [Section 51A-4.121(b)(4)(B)(i)(aa)]. |
| Rear Yard (Standard) | No minimum | Default requirement for all other cases [Section 51A-4.121(b)(4)(B)(i)(bb)]. |
| Tower Spacing (Side/Rear) | Variable | Additional 1 foot of setback for every 2 feet of height over 45 feet (maximum 30 feet total setback) [Section 51A-4.121(b)(4)(B)(ii)]. |
Front Yard Regulations
The primary front yard requirement for the LO-3 District in Dallas is 15 feet. However, the City of Dallas imposes an "Urban Form" setback to prevent "canyoning" effects on streets. Any portion of a building that rises above 45 feet in height must be set back an additional 20 feet from the property line, creating a total effective front setback of 35 feet for those upper stories [Section 51A-4.121(b)(4)(A)].
Side and Rear Yard Regulations
For the side and rear yards in a Dallas LO-3 District, the City of Dallas uses a tiered system based on the proximity of residential neighbors:
Residential Proximity
If a building site in the LO-3 District is adjacent to or directly across an alley from a residential district (specifically R, R(A), D, D(A), TH, TH(A), CH, MF, or MF(A) districts), the owner must provide a minimum 20-foot side and rear yard setback [Section 51A-4.121(b)(4)(B)(i)(aa)].
General Standards
In all other instances where residential adjacency is not present, the Dallas Development Code establishes that there is no minimum side or rear yard requirement for the LO-3 District [Section 51A-4.121(b)(4)(B)(i)(bb)].
Tower Spacing Requirements
Similar to the front yard Urban Form rules, the side and rear yards are subject to tower spacing. For any structure in the City of Dallas LO-3 District taller than 45 feet, an additional setback of one foot must be added for every two feet of height above 45 feet. This additional requirement applies only to the portion of the building over the 45-foot mark and is capped at a total maximum setback of 30 feet [Section 51A-4.121(b)(4)(B)(ii)].
Sections Cited
- Section 51A-4.121: Office Districts
- Section 51A-4.401: Minimum Front Yard
- Section 51A-4.402: Minimum Side Yard
- Section 51A-4.403: Minimum Rear Yard