Homes for Sale/Calhoun County/Port Lavaca/Port Alto - (Arnold Koop)
Active MLS #2233282 · 159 days on market

635 Marshall Johnson Avenue

Port Lavaca, TX 77979
Subdivision  ·  Port Alto - (Arnold Koop)
List Price
$399,500
$370/SF
Beds
2
Baths
1
Sq Ft
1,080
Built
1960
Lot
0.35 ac
Garage
2-car
County
Calhoun
Tax Rate
0.99%

Schools

§ 03
District
Elementary HARRISON/JEFFERSON/MADISON EL B
Middle TRAVIS MIDDLE C
High CALHOUN H S CCMR 93% · Grad 99% B
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

This cozy 2-bedroom, 1-bath cottage sits on two waterfront lots with 100' of Texas coastline. Breathtaking views and direct front yard access to Carancahua Bay in Calhoun County, Texas. It features a private pier with fish cleaning station and water-level platform, detached garage, three 50-amp RV plugs, an expansive concrete driveway, and covered storage perfect for a large boat or motorcoach. Ideally located between Port Lavaca and Palacios off HWY 35, it’s the perfect getaway for fishing, duck hunting and boating enthusiasts. Schedule your private tour today. Some days may not be available due to bookings between now and July 31.

Features

§ 02

Interior

  • Tub Shower
  • Kitchen Dining Combo
  • Dishwasher
  • Electric Range
  • Free Standing Range
  • Microwave
  • Engineered Hardwood
  • Tile
  • Heat: Window Unit
  • Cool: Window Units
  • Washer Hookup
  • Electric Dryer Hookup

Exterior & lot

  • Deck
  • Porch
  • Patio
  • Private Yard
  • Views
  • Waterfront
  • Backs To Greenbelt Park
  • None
  • Roof: Composition
  • Foundation: Pillar Post Pier
  • Additional Parking
  • Boat
  • Detached Carport
  • Driveway
  • Detached
  • Garage
  • Oversized
  • Rv Access Parking

Community

  • Water
  • Style: Traditional

Property Details

§ 03 · Full MLS record

Property

Property Type Residential
Property Sub Type Detached
Architectural Style Traditional
Year Built 1960
Year Built Source PublicRecords
New Construction No

Building

Stories 1
Levels One
Living Area 1,080 sq ft
Living Area Source Appraiser
Building Area Total 1,080 sq ft
Foundation Pillar Post Pier
Construction Other, Unknown, Wood Siding
Roof Composition

Rooms & Baths

Bedrooms 2
Bedrooms Possible 2
Bathrooms (total) 1
Bathrooms Full 1
Bathrooms Half 0
Rooms Total 6
Fireplaces 0

Interior

Interior Features Tub Shower, Kitchen Dining Combo
Flooring Engineered Hardwood, Tile
Appliances Dishwasher, Electric Range, Free Standing Range, Microwave
Laundry Washer Hookup, Electric Dryer Hookup

Exterior

Exterior Features Deck, Porch, Patio, Private Yard
Patio / Porch Deck, Patio, Porch
Fencing None
Pool Private No
Waterfront Yes
Waterfront Features Bulkhead, Bayfront, Pier, Waterfront
View Yes
View Type Water

Parking & Garage

Garage Spaces 2
Attached Garage No
Carport Spaces 1
Parking Features Additional Parking, Boat, Detached Carport, Driveway, Detached, Garage, Oversized, Rv Access Parking

Lot

Lot Size (acres) 0.3509
Lot Size Source Appraiser
Lot Features Views, Waterfront, Backs To Greenbelt Park
Additional Parcels Yes
Additional Parcel Info 24931

Location

County Calhoun
MLS Area Major 65
Subdivision Port Alto - (Arnold Koop)
Road Surface Gravel
Postal Code 77979

Utilities

Heating Window Unit
Cooling Window Units
Water Source Public
Sewer Aerobic Septic

Taxes, Terms & Disclosures

Tax Annual Amount $3,963
Tax Year 2025
Tax Rate (est.) 0.99%
Parcel # 53544
Legal Description ARNOLD KOOP, LOT 11 & 12
Listing Terms Cash, Conventional
Lease Considered No
Disclosures Other, Seller Disclosure

Room Layout

§ 04 · 6 rooms · MLS-supplied

Main level · 6

Bedroom 13 x 11
Bedroom 13 x 11
Living Room 10 x 28
Kitchen 14 x 10
Dining Room 15 x 11
Bathroom 5 x 8

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
Tax breakdown not availableWe could not resolve the taxing jurisdictions for this listing. We will enrich this when the county tax roll loads.

HOA & Community

§ 05
No HOA on recordIf this is an HOA property, details are not yet loaded. Full cert available on request.

Broadband & Connectivity

§ 06 · Rolled up from MLS
● Max advertised speed at this address
1,000 Mbps
Fiber available
Fixed Wireless
T-Mobile
Speeds per provider
Satellite
HughesNet
Speeds per provider
Satellite
Starlink
Speeds per provider
Satellite
Viasat Inc
Speeds per provider
Unknown
La Ward Communications
Speeds per provider
Unknown
MyJEC.net
Speeds per provider
Unknown
TISD Inc
Speeds per provider

Environmental Risk

§ 08
?
FEMA Zone
Flood zone: not mapped by FEMA for this area
No FEMA digital flood map covers this location, so this property's flood risk has not been established. Verify flood insurance requirements with your lender.
SFHA NOT DETERMINED
🌡 Heat days >95°F
101 days/yr above 95°F
Plus 50 days above 100°F. NOAA station records, 2016-2025 average.
30-day air qualityData not yet available
Drought (current)Data not yet available
Sources: FEMA NFHL · NOAA GHCN-Daily · EPA AQS · US Drought Monitor. Climate rollup last computed Sep 23, 2026.

Recent Comparable Sales

§ 09
No comps within 0.5 mi in the last 90 daysExpand the search radius via the "Full report" CTA.

Subdivision & Master Plan

§ 10
● Master plan
TIER: NEIGHBORHOOD
Subdivision name (MLS) City · ZIP County Listings in subdivision Active now1 Sold (last 12 mo)0 Curated amenities0
● Year-built distribution
1960s 1

Fire Protection

§ 11
Nearest station
Olivia - Port Alto Volunteer Fire Department
· Port Lavaca
Distance
2.9 mi
Straight-line from listing
ISO rating
Future data point
Avg. response
From incident log (future)

Neighborhood Demographics

§ 12 · Census tract 48057000300 · ACS 2023
Median HH income
$92,102
ACS 2023
Median home value
$188,000
Census self-report
Owner-occupied
36%
784 housing units
Bachelor's+
18%
Adults 25+
Median age
52.7
Population 986
Work from home
8%
of commuters
Commute 45min+
16%
of commuters
Below poverty
7.4%
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
635 Marshall Johnson Avenue, Port Lavaca, TX 77979
Calhoun County · 28.64°N, 96.42°W
No curated amenities within 2 mi yet.
Interactive map coming in v0.2 — currently showing schematic placement.
● Listing History
Apr 18, 2026 Listed $399,500 Becky Wied
Dec 31, 1959 Built
Status change events from HAR MLS (future: full audit trail)
● Disclosures & Attribution
Listed by Becky Wied · Wied Realty
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 Apr 23, 2026.
MLS# 2233282 · LIST DATE: Apr 18, 2026 · PARCEL: 53544
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 24, 2026, 4:59 AM CDT. Properties may subsequently be sold or off-market. Equal Housing Opportunity