SepticMatch
Collin County · Texas · Dallas-Fort Worth

Septic in Collin County, TX

What to watch for here: Collin County's posted fee sheet, dated 8/31/2011, lists $310.00 for a residential septic permit.

Residents
977,649
Rank by population
6 of 83
Sale inspection
No rule found in the county's published code

Population comes from the U.S. Census, and the rules and fees were checked Oct 23, 2026. How we check.

Written by SepticMatch's editorial teamLast reviewed Oct 23, 2026

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Septic rules in Collin County

Collin County Development Services, in Engineering, issues septic permits through its citizen self-service portal for property outside city limits. Its FAQ says to look up your city on TCEQ's authorized-agent list, and if the city isn't listed, Collin County is the authorized agent. The county's rules are Court Order No. 2008-187-03-11, which the page calls stricter than the state rules. The affidavit goes to the County Clerk. The county also posts an Affidavit of OSSF Requiring Maintenance form and an Aerobic Systems Information Sheet.

Collin County's posted fee sheet lists $310 for a residential permit with no maintenance and $335 with maintenance. That sheet is dated 8/31/2011, so the amounts may have changed. The county page leaves two things to the Court Order: how long a maintenance contract must run, and whether a homeowner may maintain the system. Read the order, or ask Development Services, before you sign a maintenance contract.

The county's rules, line by line

Who permits septic systems
Collin County Development Services (Engineering), citizen self-service portal; issues OSSF permits for properties outside city limits.
Governing code
Collin County Court Order No. 2008-187-03-11, stricter than the state rules; the OSSF affidavit is filed with the County Clerk.
Inspection at sale
No rule found in the county's published code. The county's septic pages state no inspection rule for a sale or transfer.
Permit steps
Apply through the citizen self-service portal. The county's FAQ says to check TCEQ's authorized-agent list for a city, and that if a city is not listed Collin County is the authorized agent. Affidavit of OSSF Requiring Maintenance and Aerobic Systems Information Sheet are posted.
Still to confirm with the county
The posted fee sheet is dated 2011, so the amounts may have changed. Contract term and homeowner-maintenance rules are in the Court Order, which the county page does not summarize.

Septic fees in Collin County

Collin County septic fees as printed
ItemAmountNote
OSSF residential (no maintenance)$310.00Posted fee sheet dated 8/31/2011; amounts may have changed
OSSF residential (maintenance)$335.00Posted fee sheet dated 8/31/2011; amounts may have changed
OSSF residential (no maintenance)$310.00
Posted fee sheet dated 8/31/2011; amounts may have changed
OSSF residential (maintenance)$335.00
Posted fee sheet dated 8/31/2011; amounts may have changed

Rules and fees change every year, so confirm a line with Collin County Development Services before you rely on it. "No rule found" means the pages and code we have say nothing on that line, which isn't the same as the county telling you there's no rule. To compare counties, use the county rules lookup.

What septic work costs

These are statewide Texas estimates from our model, so they aren't Collin County prices; where the county posts its own permit fees, they are on this page.

Estimated septic cost ranges
JobEstimated rangeUnit
Septic pumping$300 to $600per visit
Septic inspection$110 to $455per inspection
Drain field$690 to $4,650per repair
Septic pumping$300 to $600
per visit
Septic inspection$110 to $455
per inspection
Drain field$690 to $4,650
per repair

These are estimates, not quotes. How we estimate costs.

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