Does my Austin-area site actually need Edwards Aquifer permitting?
If a project sits over the Edwards Aquifer Recharge Zone or Contributing Zone, the answer is yes — and that review genuinely gates the construction schedule, not just the paperwork. TCEQ’s Edwards Aquifer Protection Program is administered by the state, separately from and in addition to any City of Austin review, and it carries its own timeline: up to 30 days of administrative review, followed by up to 90 days of technical review once the application is administratively complete. That means a Recharge or Contributing Zone site should plan on 90-plus days of state-level review before City review can even be considered complete — on top of the City’s own geologic assessment requirement, which is a distinct document with its own preparation timeline.
What does TCEQ actually review, and how long does it take?
TCEQ’s Edwards Aquifer Protection Program exists because the aquifer is a karst system — a direct, often rapid path from the surface to groundwater through fractured limestone, caves, and sinkholes. The program's own published review-time page states the administrative review runs up to 30 days, and technical review of an administratively complete application runs up to 90 days. Once approved, the plan expires 2 years after issuance unless more than 10% of total construction has commenced by then, and it expires with no extension available if more than 50% of total construction is not complete within 10 years of initial approval.
- Administrative review: up to 30 days
- Technical review (once administratively complete): up to 90 days
- Plan expires 2 years after issuance unless >10% of construction has started
- Plan expires with no extension if >50% of construction isn’t complete within 10 years
What does the City of Austin require on top of the state review?
Separately from TCEQ, the City of Austin requires a geologic assessment to identify sensitive karst features — caves, sinkholes, faults, fractures — that connect the surface to the aquifer on the specific parcel. It typically requires a qualified geologist, review of existing cave and karst databases, and often field reconnaissance, and the assessment expires 10 years after original certification. This is a separate document from the TCEQ plan, with its own preparation timeline, and both generally need to be accounted for before Site Plan release — which itself is a hard prerequisite to a building permit in Austin. The building official may not issue a building permit until the Site Plan is released, so any delay on the environmental or geologic-assessment side of the Site Plan process pushes the building-permit start date back on close to a one-to-one basis.
Does the Save Our Springs Ordinance apply on the same sites?
Often, yes, since the Barton Springs Zone overlaps significantly with Recharge and Contributing Zone geography. The Save Our Springs (SOS) Ordinance governs the Barton Springs Zone and caps impervious cover at 15% of net site area for development within the Recharge Zone portion of the Barton Springs Zone, 20% for the Barton Creek portion of the Contributing Zone, and 25% for the remaining Contributing Zone. Amendments to the ordinance require a City Council supermajority, which is one signal of how firmly the cap is treated. For a commercial site in this geography, impervious cover limits and Edwards Aquifer review tend to arrive together, and both belong in the earliest site-planning conversations — well before foundation design, but directly relevant to how much buildable footprint a foundation contractor is eventually pricing against.
How should a GC actually sequence a Recharge Zone project?
Confirm zone status early
Check the site against the TCEQ Recharge Zone map viewer before finalizing site plans, not after.
Commission the geologic assessment and TCEQ plan in parallel
These are separate documents with separate timelines — running them sequentially adds unnecessary schedule risk.
Budget 90-plus days for TCEQ technical review alone
That is on top of, not instead of, the City’s own Site Plan and geologic-assessment review time.
Consider the City’s Expedited Building Plan Review
A paid premium service that brings a full review team and the applicant’s design team together in one session, compressing the standard multi-cycle building review — it does not shorten the separate TCEQ or Site Plan tracks.
Edwards Aquifer permitting questions, answered directly.
What triggers TCEQ Edwards Aquifer Protection Plan review?
How long does TCEQ review actually take?
Does the TCEQ plan expire?
Is the TCEQ plan the same as the City of Austin geologic assessment?
Send your geotech report and plans.
We size every pier schedule to the site’s actual boring data, not a regional assumption.