Killeen assesses standard water, wastewater, and roadway impact fees on new dwelling units, including ADUs requiring new utility connections, under Texas Local Government Code Chapter 395. Building, plan-check, and trade permit fees are collected by Killeen Building Inspections through the city's permit portal. Texas has no ADU-specific impact-fee waiver; sharing the principal dwelling's water/sewer tap is the most common way to reduce fees.
Killeen does not offer an ADU-specific impact-fee discount. Standard development fees apply. Building permit fees are calculated on construction valuation under the Killeen Building Inspections fee schedule (typically several hundred dollars for a small ADU plus plan-check), with separate trade permits for electrical, plumbing, and mechanical work. Water and wastewater impact fees are assessed by the City of Killeen Water Services Division under Texas Local Government Code Chapter 395, which authorizes municipalities to impose roadway, water, and wastewater impact fees following a capital-improvements plan and Land Use Assumptions study. An ADU that taps into the principal dwelling's existing water meter and sewer service typically avoids new water/wastewater impact fees, paying only the marginal usage. A separately metered ADU triggers the full new-connection impact fees per Service Unit Equivalent. Roadway impact fees, if Killeen has adopted them under Ch. 395 Subchapter B, apply per residential unit by service area. Electric service is provided by Oncor (Killeen is in the Oncor service territory), gas by Atmos Energy; each utility charges its own service-extension and tap fees separately. There is no Killeen affordable-housing ADU fee waiver. Texas state law (no analog to California's Gov. Code § 65852.2(f) impact-fee waiver) leaves cities free to charge full fees on ADUs. Total all-in fee burden for a new detached ADU with separate utilities can range several thousand dollars in impact and permit fees before construction costs.
Failure to pay required impact fees results in permit denial or revocation under Killeen Code Ch. 8 and Texas Local Government Code Ch. 395. Building or occupying an ADU on an unauthorized utility tap is a building and utility-code violation. Texas Local Government Code § 54.001 authorizes civil penalties up to $1,000 per day for health-and-safety zoning violations and $500 per day for general violations.
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