Austin ETJ vs. City Limits

Side-by-Side Comparison: City Limits vs. ETJ

This comparison shows what changes if the Thaxton Corner tract is de-annexed from Austin city limits into the ETJ (governed by Travis County). Every item is specific to commercial/retail subdivision development.

Category	City of Austin (Current)	ETJ / Travis County (After De-Annex)
Zoning Authority	City of Austin Land Development Code (LDC). Must comply with base zoning district + conditional overlays. Commercial uses require specific zoning (GR, CS, etc.).	No zoning. Travis County does not zone. Land use governed by subdivision plat notes and deed restrictions. Any lawful commercial use is permitted without rezoning.
Subdivision Approval	COA Planning Commission reviews. Preliminary plat → Final plat → Site plan. Timeline: 12–24 months. Multiple review cycles common (3–6 resubmittals typical).	Travis County subdivision review. Timeline: 3–6 months. Less bureaucratic. Fewer review cycles. Staff-level approval for compliant plats.
Site Plan Review	Required for all commercial development. Reviews: drainage, transportation, utilities, compatibility, parkland, tree survey. Timeline: 4–12 months. $25K–75K in application fees.	Simplified or not required at county level for platted commercial lots. Lot buyers handle their own site plan through Travis County — faster and cheaper.
Water Service	Austin Water (COA utility). Must connect if lines are available within 250'. Capacity allocation process. Water availability letter required before plat approval.	No city water. Options: (1) Form MUD/WCID — developer-controlled, (2) Private well (limited for commercial), (3) Negotiate Austin Water retail service agreement (possible even in ETJ). MUD formation adds 6–12 months.
Sewer Service	Austin Water wastewater. Must connect if mains are available. Same capacity allocation process as water.	No city sewer. Options: (1) MUD/WCID sewer plant (expensive for small tract), (2) On-site treatment plant (OSSF for commercial = complicated), (3) Austin Water wholesale agreement (negotiate). This is the biggest hurdle for ETJ commercial development.
Impact Fees	Water: $3,500/LUE. Wastewater: $4,200/LUE. Transportation: varies by corridor. Drainage: varies. Total for a 10-acre commercial subdivision: $80K–150K+.	Travis County has minimal impact fees. If MUD is formed, the MUD finances infrastructure through bonds — cost passed to end users over time, not BBM at entitlement. Savings: $50K–100K.
Building Codes	COA building code (adopts IBC/IRC with Austin amendments — more restrictive). Energy code, green building requirements, accessibility beyond ADA.	Texas state minimum codes (IBC/IRC without Austin amendments). Simpler compliance. Lower construction costs for lot buyers (1–3% savings on vertical construction).
Tree Ordinance	COA Heritage Tree Ordinance: trees ≥24" DBH protected. Must survey, mitigate, or pay tree replacement fund. Can delay projects 3–6 months and cost $50K–200K+ in mitigation.	No county tree ordinance. Only state-level protections (minimal). Significant savings if heritage trees are present on tract. Eliminates major entitlement risk.
Setbacks / Buffers	COA compatibility standards require buffers between commercial and residential uses. Commercial-to-commercial setbacks per zoning district. Can limit lot configurations.	Travis County subdivision standards — less restrictive setbacks. Commercial-to-commercial buffers minimal. This is what enables 2 additional QSR pads in the de-annexation scenario.
Parking Requirements	COA parking standards (recently reformed but still prescriptive). Minimum ratios per use. Shared parking requires special analysis.	No county-mandated parking minimums. Market-driven — each lot buyer determines their own parking. Operators know their requirements.
Property Taxes	~2.1% effective rate (City + County + School + Special districts). City tax portion: ~0.28–0.33% of assessed value.	~1.8% effective rate (County + School + Special districts). No city tax. Saves ~$19K/yr on a $6.5M assessed value. Savings pass to lot buyers, increasing achievable lot prices.
Drainage / FEMA	COA drainage criteria manual (more restrictive than minimum). Atlas 14 rainfall data. Detention/retention requirements per COA standards.	Travis County drainage standards (less restrictive). Same FEMA flood maps apply. Atlas 14 still applies. County standards generally allow smaller detention facilities — potential cost savings.
Transportation / TxDOT	COA transportation review for TIA. City-controlled intersections. ROW dedication to COA standards.	Travis County road standards (potentially narrower ROW). TxDOT still controls state roads (Slaughter/FM 1826). TIA still likely required by Travis County for commercial subdivision of this size.

What Can and Can't Be Built in ETJ

What CAN be built (no restrictions beyond plat notes)

QSR / fast food restaurants with drive-throughs
Convenience stores with fuel sales
Retail strip centers
Banks and credit unions with drive-throughs
Medical/dental offices and urgent care
Auto service (tire, oil change, car wash)
Multifamily (with appropriate utility capacity)
Self-storage facilities
Light industrial / flex space

What is RESTRICTED even in ETJ

FEMA flood plain development: Same federal rules apply everywhere
Septic/OSSF capacity: On-site sewage for large commercial requires TCEQ approval — harder than city sewer
TxDOT access: If access is from a state road, TxDOT controls driveway permits regardless of jurisdiction
TCEQ stormwater: Construction stormwater permits (SWPPP) required everywhere
Endangered species: Federal ESA applies regardless (golden-cheeked warbler habitat in SW Austin hills)

For Thaxton Corner specifically: The proposed uses (QSR pads, c-store, multifamily) are all fully permitted in ETJ. The main challenge is water/sewer — this must be solved through MUD formation, Austin Water wholesale agreement, or creative private utility solution. This is the single biggest "how" question for the de-annexation path.

Net Impact on Thaxton Corner Value

Factor	Value Impact	Mechanism
Additional QSR pads (reduced setbacks)	+$2,400,000	2 additional lots at $1.2M each
Faster permitting → MF lot premium	+$400K–1.0M	MF developers pay more for 3-6 month vs. 12-24 month timeline
Lower property taxes → higher lot values	+$200K–400K	2-5% premium on all lots from lower operating costs
Reduced impact fees	+$50K–100K	Direct cost savings during BBM's hold
No tree ordinance → reduced entitlement risk	+$0–200K	Only if heritage trees present — eliminates mitigation cost
MUD formation cost/complexity	−$100K–250K	Upfront cost and 6-12 month timeline for utility district
De-annexation legal/engineering	−$50K–140K	Cost to pursue SB 840 petition
Net Impact (Estimated)	+$2.5M–3.5M	High confidence on pad revenue; moderate confidence on other premiums