Cedar Park, TX Accessory Structures: ADU Impact Fees (2026)

Cedar Park's water and wastewater impact fees are codified in Code Article 8.000 (Utility Related Fees) and the Water and Wastewater Impact Fees schedule. Per the city's adopted fee schedule, the wastewater impact fee is $3,170.00 per Living Unit Equivalent (LUE) for new development connecting to the city's wastewater system; water impact fees are similarly assessed per LUE. Impact fees are 'paid at the time of issuance of the building permit; provided that if water and wastewater service would require capacity expansion of the city's systems, the City Council may require payment at the time of recording of the subdivision plat.' The Cedar Park P&Z Commission updated the impact fee study at its May 20, 2025 meeting (the prior update was 2020). Because Article 11.04 Division 2 prohibits separately providing water, wastewater, or electrical utilities to an ADU — the ADU must be served via the principal dwelling's existing connection — an ADU typically is not assessed an additional LUE impact fee. However, if construction of the ADU requires expansion of the principal dwelling's water/wastewater capacity (e.g., upsizing the meter), additional fees may apply at the building permit stage. ADUs are still subject to standard building permit fees and inspection fees per Article 2.000 (Development Service Related Fees) and the Fee Schedule in Appendix A.