Harris-Brazoria Counties MUD 509
Harris-Brazoria Counties MUD 509 is a municipal utility district (MUD) in Harris County, Texas. TCEQ district number 3737177.
Property tax rate
2025 tax year (Texas Comptroller, published Jan 2026). Rates are per $100 of taxable value.
| Total | $0.67 |
|---|---|
| Maintenance & operations | $0.1 |
| Debt service | $0.57 |
2026 rates are being adopted by districts now and will be added when the Comptroller publishes them.
Estimated yearly MUD tax
Estimate before exemptions, based on the 2025 tax year rate (rate ÷ 100 × home value). Homestead and other exemptions, and the appraised value, change the actual bill.
| Home value | Yearly MUD tax |
|---|---|
| $250,000 | $1,675 |
| $350,000 | $2,345 |
| $500,000 | $3,350 |
How it compares
At $0.67, this district's 2025 total rate is $0.16 above the Harris County median of $0.51. It is higher than 67% of Harris County districts with a reported 2025 rate.
Comparison set: the 451 active MUDs and similar water districts (WCID, FWSD, SUD) in Harris County with a nonzero 2025 rate reported to the Texas Comptroller.
Rate split
Debt service: 85% ($0.57). Maintenance & operations: 15% ($0.1).
Most of the rate pays debt service, meaning the district is still paying off bonds that built its water, sewer and drainage systems. The debt portion can fall as those bonds are paid, though future rates depend on board decisions and any new bonds.
Rate history
| Tax year | Total | M&O | Debt |
|---|---|---|---|
| 2023 | $0.85 | $0.25 | $0.6 |
| 2024 | $0.67 | $0.25 | $0.42 |
| 2025 | $0.67 | $0.1 | $0.57 |
The total rate fell from $0.85 in 2023 to $0.67 in 2025, a change of −$0.18 (−21.2%).
Years shown only where a nonzero rate was reported to the Texas Comptroller.
Nearby districts
- Clear Brook City MUD — no 2025 rate reported
- Sagemeadow Utility District — 2025 total rate $0.52
- Kirkmont MUD — 2025 total rate $0.498
- Harris County MUD 381 — 2025 total rate $0.39
- Harris County MUD 382 — 2025 total rate $0.37
Official records
- Official TCEQ district record
- Texas Comptroller 2025 special district rates (XLSX)
- TCEQ Texas Water Districts dataset
Buying in this MUD? Clay soil here moves. See foundation inspection info.
Verify with the district or the county appraisal district before buying.