ADU Impact Fees: Dallas vs Irving
How do adu impact fees rules compare between Dallas, TX and Irving, TX?
Dallas and Irving have similar restriction levels.
Dallas, TX
Dallas County
Dallas charges standard impact and utility fees on ADUs without a state-mandated waiver. The Dallas Water Utilities (DWU) impact fee schedule applies based on meter size, with separate water connections triggering full impact fees. Oncor handles electric service. Roadway impact fees under Dallas City Code Ch. 49A may apply for new dwelling units. Texas has no statewide ADU fee waiver comparable to California's.
View full Dallas rules →Irving, TX
Dallas County
Irving charges standard building permit, plan review, and trade permit fees on ADUs through Development Services. Water and wastewater impact fees apply under authority of Texas Local Government Code Chapter 395 when a new utility connection is established. Texas has no statewide ADU impact fee waiver. Sharing the principal dwelling's water and sewer tap is the most common cost-reduction strategy.
View full Irving rules →Key Facts Comparison
| Fact | Dallas | Irving |
|---|---|---|
| Permit Fee Range | $400–$800 typical | - |
| DWU Water Impact | ~$2,000–$5,000 (new connection) | - |
| DWU Sewer Impact | ~$1,500–$4,000 | - |
| State Waiver | None — Texas has no ADU exemption | None — Texas has no ADU exemption |
| Roadway Impact | Dallas Code Ch. 49A may apply | May apply by service area |
| Permit Fee Basis | - | Construction valuation |
| Water/Sewer Impact | - | TX LGC Ch. 395 schedule |
| Tap Sharing | - | Avoids most impact fees |
Highlighted rows indicate differences between cities.
Dallas FAQ
Are ADU impact fees waived in Dallas?
No. Texas has no statewide ADU impact-fee waiver. Dallas charges standard fees but allows ADUs to share the principal dwelling's water/sewer tap to avoid most DWU impact fees. Building, plan-check, and trade permit fees still apply.
What does an ADU cost in fees in Dallas?
Expect $1,000–$3,000 in building, plan-check, and trade permit fees for a small ADU sharing the main house's utilities. Separate water/sewer connections add $3,500–$9,000 in DWU impact fees.
Irving FAQ
Are ADU impact fees waived in Irving?
No. Texas has no statewide ADU impact-fee waiver. Irving charges standard impact fees authorized by Texas Local Government Code Chapter 395 when a new water or sewer tap is installed. ADUs sharing the principal dwelling's existing tap typically avoid most of the impact-fee charge but still pay building, plan review, and trade permit fees.
How much does an ADU cost in fees in Irving?
Expect building, plan review, and trade permit fees through Irving Development Services based on construction valuation. New water and sewer impact fees can add several thousand dollars per Chapter 395 calculation. Get a written fee estimate from the city before starting construction.
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