ADU Impact Fees: Cedar Park vs Round Rock

Will I owe water/wastewater impact fees when I build an ADU in Cedar Park?

Usually not as a separate LUE charge — because the ADU must be served by the principal dwelling's existing water/wastewater connection (separate service is prohibited under Article 11.04), no new LUE is typically created. However, if capacity must be expanded (e.g., a larger meter), additional fees apply. Building permit and inspection fees still apply.

What is the LUE impact fee amount in Cedar Park?

The wastewater impact fee is $3,170 per Living Unit Equivalent under the current adopted schedule. Water impact fees are also assessed per LUE; consult the current Fee Schedule (Appendix A, Article 8.000) for the latest amounts following the 2025 update.

When do I pay impact fees?

Impact fees are due at the time of building permit issuance, unless the City Council requires earlier payment at plat recording for projects needing system capacity expansion (Article 8.000).