Setback Requirements for the Dallas MO-1 Mid-Range Office District

In the City of Dallas, the MO-1: Mid-range office district 1 requires a minimum front yard setback of 15 feet for all structures. Side and rear yard setbacks are typically not required unless the MO-1 district property is adjacent to a residential district, in which case the minimum distance is 20 feet. For buildings exceeding 45 feet in height, the City of Dallas mandates additional tower spacing setbacks that can increase the total side or rear yard requirement up to 30 feet [Section 51A-4.121(c)(4)].

MO-1: Mid-range office district 1 Setback Standards

The following table outlines the specific yard requirements for developments within the Dallas MO-1: Mid-range office district 1:

Setback Type	Minimum Distance	Applicability and Conditions
Front Yard	15 feet	Mandatory for all properties in the MO-1 district. [Section 51A-4.121(c)(4)(A)]
Side Yard	20 feet	Required if the lot is adjacent to or across an alley from an R, R(A), D, D(A), TH, TH(A), CH, MF, or MF(A) district. [Section 51A-4.121(c)(4)(B)(i)]
Side Yard	No Minimum	Applicable in all other cases. [Section 51A-4.121(c)(4)(B)(i)]
Rear Yard	20 feet	Required if the lot is adjacent to or across an alley from an R, R(A), D, D(A), TH, TH(A), CH, MF, or MF(A) district. [Section 51A-4.121(c)(4)(B)(i)]
Rear Yard	No Minimum	Applicable in all other cases. [Section 51A-4.121(c)(4)(B)(i)]
Tower Spacing	Variable	For structure portions over 45 feet in height, an additional 1 foot of side/rear setback is required for every 2 feet of height (max 30 feet total). [Section 51A-4.121(c)(4)(B)(ii)]

Primary Frontage and Urban Form

The City of Dallas requires a minimum 15-foot front yard for all developments in the MO-1: Mid-range office district 1. This area must generally remain open and unobstructed. If a property owner in the MO-1 district intends to utilize an urban form setback for a building over 45 feet in height, an additional 20-foot front yard setback is required for that specific portion of the structure [Section 51A-4.121(c)(4)(A)(ii)].

Residential Adjacency and Side/Rear Yard Triggers

Setback requirements for side and rear yards in the Dallas MO-1: Mid-range office district 1 are specifically tied to the proximity of residential zoning.

Residential Adjacency Standards

If an MO-1 district property line is adjacent to, or separated only by an alley from, any of the following residential districts, a 20-foot setback is mandatory:

Single-family districts (R or R(A))
Duplex districts (D or D(A))
Townhouse districts (TH or TH(A))
Clustered housing (CH)
Multifamily districts (MF or MF(A))

If the MO-1: Mid-range office district 1 property does not abut these specific residential zones, the City of Dallas does not enforce a minimum side or rear yard requirement [Section 51A-4.121(c)(4)(B)(i)].

Tower Spacing for High-Rise Structures

When a building in the MO-1: Mid-range office district 1 exceeds 45 feet in height, the City of Dallas requires increased side and rear setbacks to provide a "tower spacing" buffer. For every two feet of height above the 45-foot threshold, the developer must add one additional foot to the side and rear yard setbacks. This rule applies until the total setback reaches 30 feet. This requirement ensures that the bulk of taller office buildings in the MO-1 district does not overwhelm adjacent properties [Section 51A-4.121(c)(4)(B)(ii)].

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