Homes for Sale/Galveston County/Galveston/Sea Isle Ext 21
Active MLS #19646276 · 88 days on market

21423 Gulf Drive

Galveston, TX 77554
Subdivision  ·  Sea Isle Ext 21
List Price
$575,000
$467/SF
Beds
3
Baths
2
Sq Ft
1,230
Built
1980
Lot
0.11 ac
Garage
0-car
County
Galveston
Tax Rate
1.45%

Schools

§ 03
District
Elementary GISD OPEN ENROLL N/R
Middle GISD OPEN ENROLL N/R
High BALL H S CCMR 75% · Grad 96% C
TEA accountability ratings reflect 2024–25 where available. School attendance zones are subject to district redistricting — confirm directly with the district before making a school-based decision.

Overview

§ 01

Just steps from the beach, this coastal retreat offers the perfect blend of comfort, style, and island living. Soaring ceilings and an open-concept floor plan create a bright, airy atmosphere, while walls of windows fill the home with natural light and capture beautiful beach views. The primary suite has direct access to the south-facing deck and a private en-suite bathroom. Two guest bedrooms provide plenty of space for family and friends. The expansive south-facing deck is the perfect place to enjoy the beach views. Downstairs, the covered area offers space for hosting, complete with an outdoor shower. Whether you're looking for a full-time residence or an investment property, this gem offers the ideal opportunity to experience the best of coastal living. HOA amenities include a pool, pickleball court, park, etc.! Looking for an investment bundle? Seller willing to entertain a package offer with one or more of the following other properties - MLS #18186468, MLS #5134539!

Features

§ 02

Interior

  • All Bedrooms Down
  • En Suite Bathroom
  • Granite Counters
  • High Ceilings
  • Kitchen Island
  • Kitchen Family Room Combo
  • Main Level Primary
  • Tub Shower
  • Vaulted Ceilings
  • Window Treatments
  • Ceiling Fans
  • Kitchen Dining Combo
  • Living Dining Room
  • Programmable Thermostat
  • Dishwasher
  • Electric Oven
  • Electric Range
  • Disposal

Exterior & lot

  • Covered Patio
  • Deck
  • Patio
  • Private Yard
  • Corner Lot
  • Views
  • Waterfront
  • None
  • Covered
  • Roof: Composition
  • Attached Carport
  • Association

Community

  • Beach Rights
  • Basketball Court
  • Boat Dock
  • Beach Access
  • Marina
  • Boat Ramp
  • Picnic Area
  • Playground
  • Pickleball
  • Park
  • Pool
  • Tennis Courts
  • Beach
  • Gulf
  • Water
  • Style: Traditional

Property Details

§ 03 · Full MLS record

Property

Property Type Residential
Property Sub Type Detached
Architectural Style Traditional
Year Built 1980
Year Built Source PublicRecords
New Construction No

Building

Stories 1
Levels One
Living Area 1,230 sq ft
Living Area Source Appraiser
Building Area Total 1,230 sq ft
Construction Vinyl Siding
Roof Composition

Rooms & Baths

Bedrooms 3
Bathrooms (total) 2
Bathrooms Full 2
Bathrooms Half 0
Rooms Total 5
Fireplaces 0

Interior

Interior Features All Bedrooms Down, En Suite Bathroom, Granite Counters, High Ceilings, Kitchen Island, Kitchen Family Room Combo, Main Level Primary, Tub Shower, Vaulted Ceilings, Window Treatments, Ceiling Fans, Kitchen Dining Combo, Living Dining Room, Programmable Thermostat
Flooring Laminate
Appliances Dishwasher, Electric Oven, Electric Range, Disposal, Microwave, Dryer, Refrigerator, Washer
Laundry Washer Hookup, Electric Dryer Hookup
Windows Window Coverings

Exterior

Exterior Features Covered Patio, Deck, Patio, Private Yard
Patio / Porch Covered, Deck, Patio
Fencing None
Pool Private No
Pool Features Association
Waterfront Yes
Waterfront Features Beach Front, Waterfront
View Yes
View Type Beach, Gulf, Water

Parking & Garage

Garage Spaces 0
Carport Spaces 2
Parking Features Attached Carport, None

Lot

Lot Size (acres) 0.1102
Lot Size Source Appraiser
Lot Features Corner Lot, Views, Waterfront
Direction Faces South

Location

County Galveston
MLS Area Major 33
MLS Area Minor West End
Subdivision Sea Isle Ext 21
Road Surface Asphalt
Postal Code 77554

Utilities

Heating Central, Electric
Cooling Central Air, Electric
Water Source Public
Sewer Public Sewer
Energy Efficient Thermostat

HOA / Association

HOA Yes
HOA Fee $250
HOA Fee Frequency Annually
HOA Name Sea Isle POA
Fee Includes Common Areas, Recreation Facilities
Amenities Beach Rights, Basketball Court, Boat Dock, Beach Access, Marina, Boat Ramp, Picnic Area, Playground, Pickleball, Park, Pool, Tennis Courts

Taxes, Terms & Disclosures

Tax Annual Amount $8,345
Tax Year 2025
Tax Rate (est.) 1.45%
Parcel # 6392-0000-0006-000
Legal Description LOT 6 SEA ISLE SEC 21
Listing Terms Cash, Conventional, FHA, Va Loan
Lease Considered No
Disclosures Seller Disclosure

Room Layout

§ 04 · 5 rooms · MLS-supplied

Main level · 5

Kitchen 14 x 11
Living Room 13 x 19
Primary Bedroom 19 x 9
Bedroom 13 x 11
Bedroom 10 x 7

MUD Disclosure (§49.452)

§ 03 · Data moat
● §49.452 Notice
Not in archive
This MUD is not yet in our §49.452 archive. We'll add it on request.

Texas Water Code §49.452 requires districts to publish annual notices with tax rate, bonded indebtedness, and assessed value. Most Harris-area MUDs publish these; a handful managed by Inframark do not.

Request this notice
● What this tells you

The §49.452 notice is the only public document that lists a MUD's exact tax rate, outstanding bond debt, and the assessed value used to compute your taxes — direct from the district, not the MLS. If the district is newer or has more bonds outstanding than its neighbors, your effective tax rate will be higher here than just across the street.

Listing's rolled-up MUD rate Resolved MUD jurisdiction not mapped Match confidence

Taxes & Cost of Ownership

§ 04
● Estimated monthly payment
$4,148
30-YR FIXED · ADJUST ASSUMPTIONS BELOW
%
%
Principal & interest$3,453 Property tax$695 Homeowners insuranceTBD
Subtotal (P&I + Tax) $4,148
Yearly HOA fee $250

Illustrative only, not a quote. P&I assumes the values entered above. Insurance and HOA dues vary — consult licensed lender and insurance agent for accurate quote.

● Effective tax rate · 3-year history
202320242025
MUD
→ stable
School
0.84%
→ stable
City
0.41%
→ stable
County
0.32%
→ stable

HOA & Community

§ 05
● HOA details
$250
ANNUALLY
Association nameSea Isle POA Management co. Website Phone Cert on filepending
Fee includes
CommonAreas · RecreationFacilities
● Community amenities
bank
ATM · 0.9mi
ATM · 3.9mi
Circle K ATM · 4.6mi
gym
Seek Peace Yoga Galveston · 1.6mi
Gymaica Fitness · 4.6mi
park
· 2.0mi
· 2.1mi
· 3.1mi
grocery
Seven Seas Market · 3.8mi
Valero · 4.6mi
Circle K · 4.6mi
police_station
Jamaica Beach Police · 4.7mi
place_of_worship
Mary, Star of the Sea Church · 4.7mi
West Isle Presbyterian Church · 7.6mi
West Isle Church · 7.6mi

Broadband & Connectivity

§ 06
Broadband not mappedWe have not yet resolved FCC provider data for this block.

Environmental Risk

§ 08
V
FEMA Zone
Zone VE · Coastal High Hazard
Coastal wave-action hazard zone. Flood insurance required.
PANEL 48167C BASE FLOOD ELEV. 16.0 FT SFHA YES SOURCE 48167C_STUDY1
🌡 Heat days >95°F
6 days/yr above 95°F
Plus 0 days above 100°F. NOAA station records, 2016-2025 average.
💨 30-day air quality
AQI 44 · Good
Average daily AQI for the 30 days ending 2026-02-28. EPA AQS county monitors. Higher = worse.
🌵 Drought (current)
D1 · Moderate
US Drought Monitor county reading, week of 2026-09-15.
Sources: FEMA NFHL · NOAA GHCN-Daily · EPA AQS · US Drought Monitor. Climate rollup last computed Sep 23, 2026.

Recent Comparable Sales

§ 09
1 comparable sale nearbyAddress-level sold detail is available to registered users. Reach out to Allen for the full comparable-sales report.

Subdivision & Master Plan

§ 10
● Master plan
Sea Isle Ext 21
TIER: SUBDIVISION
Subdivision name (MLS)Sea Isle Ext 21 City · ZIPGalveston · 77554 CountyGalveston Listings in subdivision29 Active now5 Sold (last 12 mo)1 Curated amenities20
● Year-built distribution
1975s 2 1980s 1 1985s 1 2015s 1

Fire Protection

§ 11
Nearest station
Galveston Fire Department Station 8
Distance
0.4 mi
Straight-line from listing
ISO rating
Future data point
Avg. response
From incident log (future)

Neighborhood Demographics

§ 12 · Census tract 48167726102 · ACS 2023
Median HH income
$82,955
ACS 2023
Median home value
$511,700
Census self-report
Owner-occupied
27%
2,829 housing units
Bachelor's+
51%
Adults 25+
Median age
63.1
Population 1,431
Work from home
4%
of commuters
Commute 45min+
14%
of commuters
Below poverty
3.0%
tract-level

Amenities & Nearby Places

§ 13

Active listing — amenities should populate from the go-live pipeline. Click to fetch now if missing.

Location & Neighborhood

§ 13
● This Home
21423 Gulf Drive, Galveston, TX 77554
Galveston County · 29.14°N, 95.04°W
bank
ATM
0.9 mi · 1 within 2 mi
gym
Seek Peace Yoga Galveston
1.6 mi · 1 within 2 mi
park
2.0 mi · 1 within 2 mi
Interactive map coming in v0.2 — currently showing schematic placement.
● Listing History
Jun 27, 2026 Listed $575,000 Alicia Swartz
Dec 31, 1979 Built
Status change events from HAR MLS (future: full audit trail)
● Disclosures & Attribution
Listed by Alicia Swartz · RE/MAX Leading Edge
Data provided by Houston Realtors Information Service (HAR MLS). Information deemed reliable but not guaranteed. All measurements, square footage, and school assignments should be independently verified. HAR MLS content last updated Sep 3, 2026.
MLS# 19646276 · LIST DATE: Jun 27, 2026 · PARCEL: 6392-0000-0006-000
R
EHO
REALTOR® · Equal Housing Opportunity
HAR.com Copyright © 2026, Houston Realtors Information Service, Inc. Deemed reliable, not guaranteed — independently verify. HARMLS last updated Sep 23, 2026, 11:00 PM CDT. Properties may subsequently be sold or off-market. Equal Housing Opportunity