Guide to the LO-3: Limited Office District 3 in Dallas
The LO-3: Limited Office District 3 is a high-intensity office zoning designation in the City of Dallas that allows for a maximum building height of 115 feet and a maximum floor area ratio of 1.75. This district is primarily intended to accommodate professional office and limited service uses that serve neighborhood or community needs, ensuring that secondary uses remain contained within buildings to minimize impact on adjacent residential areas [Section 51A-4.121(b)(1)].
Purpose and General Character
The City of Dallas established the LO-3 District to provide a location for office developments that are compatible with and located near residential neighborhoods. The general character of the LO-3 District is defined by its focus on professional environments where service uses are intended primarily for the building's occupants rather than the general public [Section 51A-4.121(b)(1)]. Because these districts often abut residential zones, the City of Dallas mandates significant setbacks and visual intrusion protections to preserve the environmental quality of the surrounding community [Section 51A-4.121(b)(8)].
Permitted Land Uses
Land uses in the LO-3 District are categorized by their level of permission, including uses permitted by right, limited uses [L], and those requiring a Specific Use Permit [SUP] or Residential Adjacency Review [RAR] [Section 51A-4.105(a)].
Office and Professional Uses
The core of the LO-3 District consists of professional and medical services. Permitted uses include:
- Office: Standard professional offices are permitted by right [Section 51A-4.121(b)(2)(G)].
- Medical Clinic or Ambulatory Surgical Center: Permitted by right [Section 51A-4.121(b)(2)(G)].
- Financial Institution without Drive-in Window: Permitted by right [Section 51A-4.121(b)(2)(G)].
- Financial Institution with Drive-in Window: Requires a Specific Use Permit [SUP] [Section 51A-4.121(b)(2)(G)].
Institutional and Community Service Uses
The City of Dallas allows several community-oriented uses in the LO-3 District to support the surrounding neighborhood:
- Child or Adult Care Facility: Permitted by right [Section 51A-4.121(b)(2)(D)].
- Church: Permitted by right [Section 51A-4.121(b)(2)(D)].
- Public School (other than open-enrollment): Subject to Residential Adjacency Review [RAR] [Section 51A-4.121(b)(2)(D)].
- Private School or Open-Enrollment Charter School: Requires a Specific Use Permit [SUP] [Section 51A-4.121(b)(2)(D)].
Limited Retail and Personal Service Uses
Retail and service uses are highly restricted in the LO-3 District. Under the "Limited Use" [L] designation, these must be contained entirely within a building, have no exterior public entrance, and cannot exceed 10% of the building's total floor area [Section 51A-4.218]. Examples include:
- Restaurant (no drive-in/through): Permitted as a Limited Use and subject to Residential Adjacency Review [L][RAR] [Section 51A-4.121(b)(2)(J)].
- Personal Service Uses: Such as barber shops or laundry pickup [L] [Section 51A-4.121(b)(2)(J)].
- Dry Cleaning or Laundry Store: Limited to 3,500 square feet [L] [Section 51A-4.121(b)(2)(J)].
Development Standards
The City of Dallas imposes specific "Yard, Lot, and Space" regulations to control the massing and placement of structures within the LO-3 District.
| Standard | LO-3 District Requirement |
|---|---|
| Minimum Front Yard | 15 feet [Section 51A-4.121(b)(4)(A)] |
| Minimum Side/Rear Yard | 20 feet if adjacent to a residential district; otherwise 0 feet [Section 51A-4.121(b)(4)(B)] |
| Maximum Floor Area Ratio (FAR) | 1.75 [Section 51A-4.121(b)(4)(D)] |
| Maximum Building Height | 115 feet [Section 51A-4.121(b)(4)(E)] |
| Maximum Number of Stories | 9 stories [Section 51A-4.121(b)(4)(H)] |
| Maximum Lot Coverage | 80% (includes aboveground parking structures) [Section 51A-4.121(b)(4)(F)] |
Additional Provisions and Buffering
To protect the residential nature of surrounding properties, the City of Dallas applies the following additional rules in the LO-3 District:
- Visual Intrusion: No portion of a balcony or opening that faces a residential district may penetrate the residential proximity slope [Section 51A-4.121(b)(8)(B)].
- Screening: If a building site in the LO-3 District abuts or is across an alley from a residential district, the building site must be screened from that district [Section 51A-4.121(b)(8)(E)].
- Loading Spaces: Off-street loading spaces are prohibited in the required front yard [Section 51A-4.121(b)(5)(B)].
- Trip Generation: If a proposed development is estimated to generate more than 6,000 trips per day or 500 trips per acre, a site plan must be submitted for Development Impact Review [DIR] [Section 51A-4.121(b)(8)(A)].
Sections Cited
- Section 51A-2.102: Definitions
- Section 51A-4.101: New Zoning Districts Established
- Section 51A-4.105: Interpretation of District Regulations
- Section 51A-4.121: Office Districts
- Section 51A-4.210: Retail and Personal Service Uses
- Section 51A-4.218: Limited Uses
- Section 51A-4.803: Site Plan Review