Texas / Galveston County / ZIP 77590 / Grand Cay Harbour

Grand Cay Harbour

Neighborhood · Galveston County, TX · ZIP 77590Appraisal data 2026-07-20

Grand Cay Harbour (neighborhood, Galveston County, Texas): 159 homes, median value $538,312, tax rate about 3.13%, 20.8% in a FEMA high-risk flood zone. Flood zones, property taxes, home values and pipelines from public records.

159homes

$538,312median value, 2026

3.13%median tax rate

20.8%in FEMA high-risk flood zones

+4.8%value change since 2022

Flood zones

FEMA data

33homes in a FEMA high-risk zone (A or V, 1% chance a year): 20.8% of mapped homes, below the 34.2% across Galveston County.

0homes in the moderate zone (0.2% chance a year): 0.0%.

FEMA National Flood Hazard Layer, zone at the center of each lot, for the 159 homes with a mapped lot. Flooding outside mapped zones does happen; check the flood insurance claims history and an elevation certificate for a specific house.

Property taxes

Appraisal district data

3.13%median combined property tax rate (the same combined rate on nearly every home).

$16,870yearly tax on the $538,312 median home at the full rate, before any exemption.

Taxing units on homes here

Taxing unit	Share of homes
Galveston County Road & Flood	100%
Texas City ISD	100%
College of the Mainland	100%
Galveston County MUD No. 52	100%
Galveston County	100%

Rates are the sum of every taxing unit on each property at 2025 adopted rates, the latest full year. Values from Galveston Central Appraisal District files dated 2026-07-20. Homestead exemptions and caps belong to the current owner and do not transfer to a buyer.

Homes and values

Appraisal district data

Measure	Value
Median market value, 2026	$538,312 (above the Galveston County median of $318,095)
Median change in value, 2022–2026	+4.8% (same homes, 159 with values in both years)
Median year built	2016
Median living area	2,374 sq ft
Median lot size	6,681 sq ft

When the homes were built

Decade	Homes
2010s	140
2020s	18

Single-family homes, townhomes, condos and mobile homes on owned land. Market value is the appraisal district's estimate, not an appraisal or sale price.

Pipelines

Railroad Commission data

0homes within 500 ft of an in-service transmission pipeline.

5homes within 1,000 ft.

2,410 ftmedian distance from a home to the nearest line.

Operators of lines within 1,000 ft of homes

Operator	Homes
Linde Inc.	5

Straight-line distance from the center of each lot to the nearest in-service transmission line on the Texas Railroad Commission's map. Distribution gas lines are not included.

Streets

Appraisal district data

Brigantine Cay Ct (89), Allen Cay Dr (55), Highborne Cay Ct (15)

Streets with the most homes in this neighborhood, with home counts.

Look up a house in Grand Cay Harbour

Street address

Each house report shows its own value history, tax units, flood zone at the center of the lot and the nearest pipeline.

Other neighborhoods in 77590

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