ADU Impact Fees: Allen vs Plano
How do adu impact fees rules compare between Allen, TX and Plano, TX?
Allen, TX
Collin County
No data available yet for Allen.
Plano, TX
Collin County
Plano charges standard impact and utility fees on new dwelling units under Texas Local Government Code Chapter 395 authority, including water/wastewater impact fees and roadway impact fees in service areas. There is no Texas statewide ADU impact-fee waiver comparable to California Gov. Code §65852.2(f). Costs depend on whether the unit requires a new utility connection.
View full Plano rules →Key Facts Comparison
| Fact | Allen | Plano |
|---|---|---|
| Authority | - | TX LGC Ch. 395 Impact Fees |
| Water Impact | - | ~$1,500-3,500 per new SFE |
| Wastewater Impact | - | ~$2,000-4,500 per new SFE |
| Roadway Impact | - | Applies in service areas |
| Share Existing Tap | - | Avoids most impact fees |
Highlighted rows indicate differences between cities.
Allen FAQ
No FAQs available.
Plano FAQ
Are ADU impact fees waived in Plano?
No. Texas has no statewide ADU impact-fee waiver. Plano charges standard fees under Texas Local Government Code Chapter 395. However, accessory units sharing the principal dwelling's existing water/sewer tap can avoid most impact fees — building, plan-check, and trade permit fees still apply.
What does an accessory unit cost in Plano fees?
Expect $1,500-3,500 in building, plan-check, and trade permit fees for a small unit sharing the main house's utilities. Separate water/sewer connections add $3,500-8,000 in Chapter 395 impact fees plus roadway impact fees if applicable.
Will my property taxes go up?
Yes. The Collin Central Appraisal District will reassess the property after the certificate of occupancy. Plano property taxes are around 0.42% city + Collin County + Plano ISD, totaling roughly 2.0-2.4% of appraised value.
Compare other topics
See how Allen and Plano compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool