Grand Harbor property tax rate
Unincorporated Montgomery ISD area, Montgomery County, TX · No MUD mapped · School: Montgomery ISD
Taxing units and rates
All 18 mapped sections share the same taxing units.
| Taxing unit | Rate per $100 | Tax year · source |
|---|---|---|
| Montgomery County | 0.386 | 2026 · County Tax Office |
| Montgomery County Hospital District | 0.0458 | 2026 · County Tax Office |
| Montgomery ISD | 1.0479 | 2026 · County Tax Office |
| Montgomery County ESD 2 | 0.1 | 2026 · County Tax Office |
| Combined | 1.5797% |
Not in the combined rate: PID assessments, TIRZ (which do not add a tax), and HOA dues.
This combined rate is higher than about 8% of the 6,100 fully verified subdivision sections in Montgomery County, and 0.33 percentage points below the county median of 1.91% — about $1,329 a year less on a $400,000 home.
Within Unincorporated Montgomery ISD area, developments range from 1.576% (Windcrest Farms) to 3.0297% (Two Step Farm). See all 193.
Estimated yearly property tax
| Taxable value | Yearly, no exemptions | Per month | Yearly w/ school homestead* |
|---|---|---|---|
| $300,000 | $4,739 | $395 | $3,272 |
| $400,000 | $6,319 | $527 | $4,852 |
| $500,000 | $7,898 | $658 | $6,431 |
| $750,000 | $11,848 | $987 | $10,381 |
*Applies only the mandatory $140,000 school-district homestead exemption (Texas Tax Code §11.13(b)). Other units may offer optional homestead exemptions plus over-65/disabled exemptions, so a homestead bill is often lower. Taxable value is the appraised value, which can differ from the price paid.
Estimate the true monthly cost of a home here →
What's here
805 parcels: 723 single-family homes; 2 multifamily; 70 vacant lots; 2 rural/acreage; 6 commercial/industrial; 2 other (utility, personal, minerals).
Residential buildings with a recorded year built: 720; built 1999–2025 (average 2009); average main living area about 3,690 sq ft.
Source: MCAD parcel records via Montgomery County GIS parcel layer (property-type codes and improvement data), retrieved Oct. 29, 2026. Counts only; no owner data used.
Sections (18)
| Section | Plat name | MCAD code | Combined | Confidence | Parcels |
|---|---|---|---|---|---|
| 01 | Grand Harbor 01 | S538000 | 1.5797% | high | 82 |
| 02 | Grand Harbor 02 | S538002 | 1.5797% | high | 75 |
| 03 | Grand Harbor 03 | S538003 | 1.5797% | high | 123 |
| 04 | Grand Harbor 04 | S538004 | 1.5797% | high | 26 |
| 04-A | Grand Harbor 04-A | S538081 | 1.5797% | high | 9 |
| 05 | Grand Harbor 05 | S538005 | 1.5797% | medium | 74 |
| 06 | Grand Harbor 06 | S538006 | 1.5797% | high | 54 |
| 06-A | Grand Harbor 06-A | S538080 | 1.5797% | high | 5 |
| 07 | Grand Harbor 07 | S538007 | 1.5797% | high | 11 |
| 08 | Grand Harbor 08 | S538008 | 1.5797% | high | 65 |
| 08 Replat 01 | Grand Harbor 08 Replat 01 | S538091 | 1.5797% | high | 2 |
| 09 | Grand Harbor 09 | S538009 | 1.5797% | high | 53 |
| 10 | Grand Harbor 10 | S538010 | 1.5797% | high | 28 |
| 11 | Grand Harbor 11 | S538011 | 1.5797% | high | 18 |
| 12 | Grand Harbor 12 | S538012 | 1.5797% | high | 40 |
| 14 | Grand Harbor 14 | S538014 | 1.5797% | high | 48 |
| 15 | Grand Harbor 15 | S538015 | 1.5797% | high | 62 |
| 16 | Grand Harbor 16 | S538016 | 1.5797% | high | 30 |
Rates: Montgomery County Tax Office and Texas Comptroller (plus official district documents where noted in data notes). Districts: Montgomery County GIS, checked against MCAD parcel records. See sources & method.
Informational only. This site is not tax, legal, financial, or real estate advice, and it is not affiliated with Montgomery County, the Montgomery Central Appraisal District, the Montgomery County Tax Office, or any other government body. Rates are nominal (before exemptions) and come from public sources that can be wrong or out of date. District boundaries here are approximate. Always verify a specific property on the MCAD property search and confirm current rates with the Montgomery County Tax Office.