October 16, 2025
Buying or selling a home in Rivercrest and seeing “septic” all over the disclosures? You are not alone. Rivercrest has a mix of lakefront and hilltop lots, and the rules change depending on where your drainfield sits. With the right plan, you can protect your timeline, avoid surprises, and keep your deal on track. Let’s dive in.
Rivercrest sits in Austin and Travis County, so you need to confirm which office regulates your specific address. If a property has water frontage on Lake Austin or its tributaries, the City of Austin’s Austin Water OSSF program is the authority. Use the City’s interactive map and program page to verify the parcel before you act. Start with Austin Water’s OSSF page.
If the property is outside the City’s OSSF jurisdiction, Travis County Development Services handles septic permitting. Their residential OSSF page outlines permit types, submittal checklists, and inspection contacts. Check Travis County’s OSSF permit page if the City map shows you are not under Austin Water.
When jurisdiction is unclear, the Texas Commission on Environmental Quality (TCEQ) sets the statewide rules and can help you understand the baseline requirements. Local programs can be stricter than state minimums. Review TCEQ’s OSSF permitting guidance to understand how the pieces fit together.
You will most commonly see permits for a new installation, a repair or replacement, an alteration or extension, or an abandonment. A simple ownership change can also trigger an amendment to the license to operate. Both Austin and Travis County require permits for construction, most repairs, and replacements.
Typical applications include a site plan, soil evaluation, and property details. Many systems require a TCEQ-licensed site evaluator or a professional engineer for design. Plan ahead so you have the right professionals lined up before you submit.
At a high level, expect the sequence to run site evaluation, system design, permit review, construction, then inspections and final approval. State rules give local authorities about 30 days to approve or deny planning materials, but real timelines depend on complexity and submittal quality. TCEQ’s guidance on permits and timelines is a good baseline.
Inspections are required during construction. Both Austin and Travis County schedule inspections through their portals or by email or phone. Build in lead time for inspection requests, especially on larger or more complex systems.
For fees, you will pay a local permit fee plus a small TCEQ research fee. The state lists baseline application fees in 30 TAC §285.21, but local schedules vary, so confirm current numbers directly with the permitting office. See the state fee reference at 30 TAC §285.21.
Lake proximity and nitrogen reduction. If the drainfield sits within 75 feet of Lake Austin or within mapped recharge zones, Austin may require a nitrogen-reducing treatment system. These systems usually come with a maintenance contract obligation and higher upfront and ongoing costs. Verify whether your parcel triggers these rules on Austin Water’s OSSF page.
Setbacks and separation distances. State rules set minimum distances from tanks and drainfields to wells, surface water, property lines, and more. Local programs can be stricter. Your designer will measure and show these on the site plan. You can review the state table in Texas Administrative Code separation distances.
Small lots and lot joining. Some Rivercrest lots are tight. If a single lot cannot fit an approved system, Austin may allow you to join adjacent lots with a recorded restrictive covenant. This requires legal work and can affect title timing, so address it early.
Floodplain and watershed constraints. Properties near the lake or creeks may sit in regulated floodplains. Extra reviews or steps can apply to repair or replacement work. For context on local permit center guidance, see Travis County’s permitting center.
Follow these steps to keep your Rivercrest transaction smooth and compliant:
Once you take title, update ownership with the permitting authority and confirm your system’s maintenance schedule. For advanced systems, keep your maintenance provider active and log service visits. Staying current protects your investment and prevents future permitting headaches.
Ready to navigate septic permits with confidence in Rivercrest? Let’s plan your path from disclosure to a smooth close. If you would like tailored guidance for your property, connect with Shavonne Martin.
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