Verified against county records · sources last read August 13, 2026 · rules change — confirm with the agent before applying
A standard septic permit in Wise County costs $360, an aerobic system or anything requiring testing costs $560, and altering, extending, replacing or repairing an existing system costs half the current fee. Those figures come from the county’s own permit handout, updated April 30, 2024. The catch is not a fee: Wise County requires a permit on every tract, no matter how large, so the statewide ten-acre exemption does not apply here.
Budget $360 for a conventional system and $560 for an aerobic system, with repairs at half rate and $100 for a re-inspection.
| Application type | Fee |
|---|---|
| Standard (conventional) system | $360 |
| Aerobic system, or anything requiring testing | $560 |
| Alter, extend, replace or repair an existing permit | Half the current fee ($180 / $280) |
| Re-inspection | $100 |
| Non-profit septic permit | $10 |
Two details sit in the fine print: the half-rate repair provision has applied since March 5, 2009, and a permit expires one year from the date of payment, so buying early to hold a build slot starts that year running.
The adopted Order also requires a $10 TCEQ fee on each permit for the state Water Resources Management Account. The handout does not break that $10 out, and no county document says whether it sits inside the $360 and $560 or on top. Ask when you file.
Where third-party directories publish lower Wise County figures, the handout at co.wise.tx.us governs. Our Texas septic permit fee index compares these amounts statewide.
Wise County Environmental Services permits most of the county, but TCEQ has authorized six other agents inside the county line, and one of them bans spray systems outright.
Wise County Environmental Services 2901 S FM 51, Bldg 100, Decatur, TX 76234 Mailing: PO Box 899, Decatur, TX 76234-0370 Phone: (940) 627-9332 · Fax: (940) 627-6171 Email: publicworks@co.wise.tx.us Hours: Monday to Friday, 7:30 a.m. to 5:00 p.m. TCEQ agent number 620205 (status: current)
TCEQ’s record gives that agent the entire county except the Cities of Aurora, Bridgeport, Fort Worth, New Fairview and Paradise, and land within 2,000 feet of Lake Bridgeport. Each of those cities is its own authorized agent. Decatur, Boyd, Chico, Alvord, Rhome and Runaway Bay are not carve-outs, so the county permits inside those city limits.
The agent nobody writes about is the last one. The Tarrant Regional Water District (TRWD) permits every on-site sewage facility (OSSF) within 2,000 feet of the Lake Bridgeport conservation pool (below 842.60 feet above mean sea level) and the Eagle Mountain Lake conservation pool (below 649.10 feet). Inside those rings the county default inverts: every system needs a Registered Professional Sanitarian (RS) or Professional Engineer (PE) design even if it is conventional; permits are required at any tract size; maintenance and chlorine-residual testing are reported quarterly; and new surface irrigation systems are prohibited.
That matters: 67% of the 564 systems the county authorized in 2025 used surface irrigation. A lakefront lot at Bridgeport faces the opposite default from one three miles inland. TRWD’s OSSF contact is Chris Robinson, (903) 389-3928.
Six of the seven actually issued permits in 2025. TCEQ’s authorized-agent report records 564 from the county, 24 from TRWD, 23 from New Fairview, 12 from Paradise, 6 from Aurora and 1 from Bridgeport, for 630 countywide. Fort Worth, whose extraterritorial jurisdiction reaches into Wise County, issued none. Our Texas authorized agent directory maps the same question statewide.
Two separate adopted county instruments say a permit is required regardless of tract size. The OSSF Order, Section 10(D), reads:
“Wise County shall require an application, permit and inspection for construction, alteration, extension or repair to a residential or commercial on-site sewage facility, regardless of the size of the tract of land.”
The Development Rules and Regulations, Section 6.09.B(4), put it plainly: “All on-site sewage facilities are required to obtain a permit including land tracts that are ten (10) acres or larger.” Our guide to the Texas ten-acre rule explains the statewide exemption and which counties have set it aside.
Lot size is regulated separately. Subdivided single-family lots on public water must be at least one acre and lots on a private well at least two acres, and in both cases the area available for the system must be “no less than two times the design area.”
One unresolved conflict sits in the county’s own paperwork: the Order applies that minimum to subdivisions “platted or created after January 1, 1988,” while the fee handout dates the same rule to February 3, 1997. A warranty deed predating the trigger grandfathers smaller lots, so ask which date the office applies. Separately, land divided since May 15, 2000 into tracts of ten acres or less gets referred for platting; call (940) 627-6135.
The county will not accept an incomplete file, and the checklist differs by system type.
For a standard system, file:
For an aerobic system, or anything requiring testing, file:
Two of those deserve emphasis. The affidavit is the Affidavit to the Public required under 30 TAC §285.91(12), and the checklist marks it filed: recorded in Wise County deed records before you submit, not signed at the counter. The two-year maintenance contract must also exist before the permit issues, not after the system runs.
A certified OSSF Site Evaluator, Professional Sanitarian or Professional Engineer may perform the site evaluation, so a PE is not required for that step. The design is where the paths split: standard systems use the county’s own as-built design sheet, aerobic systems need a Registered Sanitarian or Professional Engineer design. You also need a 911 address before you apply.
Approval produces an Authorization to Construct; the permit to operate comes only after a passing inspection. The application form says approval “constitutes authorization for construction,” with a permit to operate following “a successful inspection of the installed system.” Build after the authorization, not before, and expect the $100 re-inspection charge if the work is not ready.
Be careful with turnaround figures from elsewhere. Wise County publishes none for a single-lot residential permit. Its only published deadline, 45 days, applies to subdivision-scale planning materials, which a Professional Engineer or Professional Sanitarian must prepare. Sites in a FEMA 100-year floodplain may also need a separate county Floodplain Development Permit; the site evaluation form asks about it.
Aerobic maintenance requires a licensed provider unless you fall inside one of three narrow exceptions, and the county asks more than the state does: inspections at least once every four months, with sludge levels in the pump tank and the condition of the spray area on every report. Graywater systems need a permit too, and permit decisions can be appealed to the Commissioners Court.
Wise County links every OSSF form from one place: the Important Documents page, under “Public Works.” That set covers:
There is no online portal; you file on paper at 2901 S FM 51. The county publishes no installer list, no maintenance-provider list and no septic complaint form. Verify any license at TCEQ’s licensing lookup, or see the Wise County hub for the license-verified directory view.
Yes. Wise County requires a septic permit on every tract, whatever its size. The adopted OSSF Order demands an application, permit and inspection “regardless of the size of the tract of land,” and the Development Rules repeat it for tracts of ten acres or larger. The statewide ten-acre exemption does not operate here.
A standard Wise County septic permit costs $360; an aerobic system, or anything requiring testing, costs $560. Both amounts come from the county handout updated April 30, 2024. Repairs and alterations are half the current fee, and a failed inspection costs $100 to redo.
The Tarrant Regional Water District issues them, not Wise County, within 2,000 feet of the Lake Bridgeport or Eagle Mountain Lake conservation pools. TRWD requires an RS or PE design on every system, prohibits new surface irrigation systems, and requires quarterly maintenance reporting including chlorine residual.
The county publishes no turnaround time for a single residential lot. Its only published deadline, 45 days, applies to subdivision planning materials. A permit expires one year from the date of payment.
Whatever your soil supports, though surface irrigation dominates the county’s permit record. Of the 564 systems Wise County authorized in 2025, 378 used surface irrigation, 160 were standard trench or bed, 13 EZflow, 8 leaching chamber and 5 drip. Spray is the norm here, which makes the TRWD lake ban a sharp break. Price both before you buy land; our new system cost guide breaks down the difference.
Fees and the submittal checklist come from Wise County’s “How to Obtain Your Permit” handout (stamped Updated 4-30-2024). Local rules are quoted from the Amended Order Entitled Wise County On-Site Sewage Facility Rules and Regulations, adopted February 13, 2012 and approved by the TCEQ Executive Director May 7, 2012. The county does not host that order; the only public copy comes from TCEQ’s OARS system. Lot-size and platting rules are cross-checked against the Development Rules and Regulations, agent jurisdictions come from TCEQ’s OARS records, lake rules from TRWD’s two orders, and permit counts from TCEQ’s authorized-agent reports.
Where the county’s documents disagree, this page reports the disagreement rather than picking a side. Where the county publishes nothing, it says so rather than estimating.
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