Harris-Waller Counties MUD 12
Harris-Waller Counties MUD 12 is a municipal utility district (MUD) in Harris County, Texas. TCEQ district number 3737183.
Property tax rate
2025 tax year (Texas Comptroller, published Jan 2026). Rates are per $100 of taxable value.
| Total | $0.99 |
|---|---|
| Maintenance & operations | $0.46 |
| Debt service | $0.53 |
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 | $2,475 |
| $350,000 | $3,465 |
| $500,000 | $4,950 |
How it compares
At $0.99, this district's 2025 total rate is $0.48 above the Harris County median of $0.51. It is higher than 85% 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: 54% ($0.53). Maintenance & operations: 46% ($0.46).
The rate is split between paying off bonds for water, sewer and drainage infrastructure and covering day-to-day operations.
Rate history
| Tax year | Total | M&O | Debt |
|---|---|---|---|
| 2023 | $0.99 | $0.99 | none |
| 2024 | $0.99 | $0.35 | $0.64 |
| 2025 | $0.99 | $0.46 | $0.53 |
The total rate was unchanged from 2023 to 2025 at $0.99.
Years shown only where a nonzero rate was reported to the Texas Comptroller.
Nearby districts
- Harris County MUD 600 — no 2025 rate reported
- Harris County MUD 8 — 2025 total rate $0.234
- Harris-Waller Counties MUD 10 — 2025 total rate $1.5
- Harris County MUD 588 — 2025 total rate $1.5
- Harris County MUD 524 — no 2025 rate reported
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.