Wylie, TX Building Setbacks & Zoning: Structure Height Limits (2026)

Appendix B, Section 2.5.B sets the citywide baseline: no structure may be erected, reconstructed, enlarged, structurally altered, or moved in a manner that evades conformity with the height regulations for the district where it sits. For the main dwelling, Figure 3-1 (Agricultural District, AG/30) fixes the maximum at 40 feet, and the same 40-foot cap repeats in Figure 3-2 (Single Family-Estate), Figure 3-3 (SF-20/26) and Figure 3-4 (SF-10/24), so every low- and medium-density single-family lot in Wylie shares the same ceiling regardless of lot size.

Accessory structures are governed separately under Section 2.5.C.2.f: 15 feet on lots smaller than one acre and 20 feet on lots of one acre or larger, with AG/30 accessory buildings held to the 20-foot figure outright because most Agricultural lots exceed an acre. A detached garage, workshop or barn that clears these limits needs either a variance from the Zoning Board of Adjustment or reclassification of the lot; there is no administrative waiver written into Section 2.5. Height for wind-powered systems is calculated differently, from average natural ground level to the highest point of the blade arc, and is not interchangeable with the structure-height figures above.

Because the AG/30, SF-ED, SF-20/26 and SF-10/24 figures each repeat the 40-foot main-structure number, a builder cannot use a smaller lot classification to claim a taller allowance; the cap travels with the use, not the acreage. The Building Official reviews these figures at the building-permit stage, and Code Enforcement can order work stopped on any structure under construction in excess of the district's height figure.