Do Dallas tree preservation rules affect my remodel?

They often do. Article X of Chapter 51A of the Dallas Development Code is the city's tree-preservation ordinance, and it protects every tree on a parcel that meets the size and species thresholds the article defines, not just trees in front yards or on visible street frontages. The default threshold for a regulated protected tree is an eight-inch trunk diameter at four-and-a-half feet above grade (DBH), with higher thresholds for fast-growing or invasive species and lower thresholds for designated heritage species like Bur oak and Pecan.

Section 51A-10.124 sets the protected-zone geometry. The Critical Root Zone is a circle of radius equal to one foot per inch of trunk DBH, measured from the trunk center. Construction inside the CRZ — trenching, grade change, equipment staging, soil compaction, root pruning — counts as a regulated impact even if the tree itself is preserved. Section 51A-10.131 lists the mitigation pathways: in-kind replacement at a caliper-inch ratio, payment into the Reforestation Fund at a per-inch fee, or a combination. Fees scale with tree size and species and commonly run $100 to $500 per protected inch for typical residential mitigation.

The scopes that most reliably trigger Article X review are large additions that extend the building footprint, new accessory structures (garage, ADU, pool house), site regrading or driveway expansion, and any drainage work that cuts through a protected root zone. A pure interior remodel rarely triggers tree review; a kitchen pop-out into the side yard often does.

The procedural trap is sequencing. Tree-survey submittal happens at the building-permit application stage, and Dallas Development Services will not issue the building permit until the tree-mitigation plan is approved. Homeowners who wait to engage an arborist until after foundation work is staged routinely lose two to four weeks waiting on tree review. Commission the tree survey at schematic design, identify the protected specimens early, and price mitigation into the budget before sending plans into permit review.