The 2018 International Energy Conservation Code (IECC) is the statewide energy code for Texas. It applies to new residential buildings and certain major renovations/additions.
Which Buildings Must Follow the Texas Energy Code?
✔ All new residential construction, including:
– One- and two-family dwellings
– Townhouses
– Multifamily buildings (Group R-2, R-3, R-4) that are three stories or less above grade
🚫 The energy code does NOT apply to:
– Hotels, motels, and other transient housing
– High-rise residential buildings (four stories or more)
– Historic buildings exempt under state or local preservation rules
Energy Code Requirements for Existing Buildings
🔹 The 2018 IECC applies to major renovations and additions:
✔ Additions must meet new construction energy efficiency standards.
✔ Alterations affecting insulation, windows, or HVAC systems must comply with current efficiency requirements.
✔ If cavities are opened during renovations, insulation and air sealing upgrades may be required.
Texas Enforcement and Compliance
Texas enforces the 2018 IECC, but local jurisdictions may adopt amendments:
✔ Austin, Houston, and Dallas have stricter energy efficiency standards.
✔ Check with your local building department for regional variations.
📞 888-213-3975 – Local Energy Audits – Certified testing for blower doors, duct leakage, and energy efficiency compliance.
