Arlington, TX Accessory Structures: ADU Impact Fees (2026)

Arlington does not offer ADU-specific impact fee waivers. Standard development fees apply: building permit fees based on construction valuation (typically $500–$1,200 for small ADUs under the OneStart fee schedule), plan-check fees (about 65% of permit), and trade permit fees (electrical, plumbing, mechanical). Arlington Water Utilities charges Water and Wastewater Impact Fees under Arlington City Code Chapter 35 when a new water or sewer service is required — typically $2,500–$4,500 for water and $2,000–$3,500 for wastewater based on the 2024 schedule for a single-family equivalent. ADUs sharing the principal dwelling's existing tap typically pay no additional impact fee but may pay a small secondary-dwelling charge. Arlington Roadway Impact Fees under Chapter 35.5 may apply for net new dwelling units in some service areas, ranging $1,000–$3,000 per residential unit depending on Roadway Capacity Area. Electric service is provided by Oncor; gas by Atmos Energy; both charge their own service-extension fees separately. Texas has no statewide ADU impact-fee waiver analogous to California Gov. Code § 65852.2(f). Arlington's Affordable Housing programs administered by Community Development and Planning may waive certain fees for income-restricted ADUs but require separate application and deed restriction.