Pending

$494,505

318 Mountain Oak, San Antonio, TX 78009

4beds

2,399sqft

$3,531/mo

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Single Family Residence

Built in 2026

6,534 Square Feet Lot

$493,800 Zestimate^®

$206/sqft

$46/mo HOA

What's special

Striking all-brick exteriorDedicated officeSeparate dining roomElegant arched entrywayOpen and airy feel

Stunning 4-bedroom, 3-bath home with a dedicated office, perfectly situated in the charming town of Castroville. This thoughtfully designed home offers the perfect blend of luxury, space, and functionality. The striking all-brick exterior and elegant arched entryway create a beautiful, upscale first impression. Step inside to soaring ceilings in the entry that enhance the home's open and airy feel. The layout features a separate dining room that maintains definition while still flowing seamlessly into the main living areas-ideal for both everyday living and entertaining. Conveniently located just 17 minutes from Lackland Air Force Base, this home offers the charm of small-town living with easy access to nearby amenities. This home truly has it all-space, style, and an unbeatable location. **Photos are representative - not of actual home** Projected to be completed August 2026**

33 days

29

2

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 4
Bathrooms: 3
Full bathrooms: 3

Primary bedroom

Features: Walk-In Closet(s), Ceiling Fan(s)
Area: 208
Dimensions: 16 x 13

Bedroom 2

Area: 120
Dimensions: 12 x 10

Bedroom 3

Area: 121
Dimensions: 11 x 11

Bedroom 4

Area: 132
Dimensions: 12 x 11

Primary bathroom

Features: Tub/Shower Separate, Double Vanity
Area: 110
Dimensions: 11 x 10

Family room

Area: 288
Dimensions: 18 x 16

Kitchen

Area: 252
Dimensions: 18 x 14

Office

Area: 110
Dimensions: 11 x 10

Heating

Central, Electric

Cooling

16+ SEER AC, Ceiling Fan(s), Central Air

Appliances

Included: Cooktop, Built-In Oven, Microwave, Disposal, Dishwasher, Plumbed For Ice Maker, Vented Exhaust Fan, Electric Water Heater, Plumb for Water Softener, ENERGY STAR Qualified Appliances, High Efficiency Water Heater
Laundry: Washer Hookup, Dryer Connection

Features

One Living Area, Separate Dining Room, Eat-in Kitchen, Two Eating Areas, Kitchen Island, Pantry, Study/Library, Utility Room Inside, 1st Floor Lvl/No Steps, High Ceilings, Open Floorplan, High Speed Internet, Master Downstairs, Ceiling Fan(s), Chandelier, Programmable Thermostat
Flooring: Carpet, Ceramic Tile, Vinyl
Windows: Double Pane Windows, Low Emissivity Windows
Has basement: No
Number of fireplaces: 1
Fireplace features: One, Family Room

Interior area

Total interior livable area: 2,399 sqft

Property

Parking

Total spaces: 2
Parking features: Two Car Garage, Attached, Oversized, Garage Door Opener
Attached garage spaces: 2

Accessibility

Accessibility features: No Steps Down, Level Lot, No Stairs

Features

Levels: One
Stories: 1
Patio & porch: Covered
Exterior features: Sprinkler System
Pool features: None
Fencing: Privacy

Lot

Size: 6,534 Square Feet
Features: Curbs, Street Gutters, Sidewalks, Streetlights

Details

Parcel number: CA00450000100050513736

Construction

Type & style

Home type: SingleFamily
Property subtype: Single Family Residence

Materials

Brick, 4 Sides Masonry, Stone, Radiant Barrier
Foundation: Slab
Roof: Composition

Condition

New Construction
New construction: Yes
Year built: 2026

Details

Builder name: Chesmar Homes

Utilities & green energy

Electric: CPS
Sewer: Castroville, Sewer System
Water: Castroville, Water System
Utilities for property: Cable Available

Green energy

Green verification: HERS Index Score
Indoor air quality: Integrated Pest Management

Community & HOA

Community

Features: Playground, Jogging Trails
Security: Smoke Detector(s), Security System Owned, Prewired, Controlled Access
Subdivision: Alsatian Oaks

HOA

Has HOA: Yes
HOA fee: $550 annually
HOA name: GOODWIN & COMPANY

Location

Region: Castroville

Financial & listing details

Price per square foot: $206/sqft
Tax assessed value: $16,650
Annual tax amount: $69
Price range: $494.5K - $494.5K
Date on market: 6/22/2026
Cumulative days on market: 11 days
Listing terms: Conventional,FHA,VA Loan,TX Vet,Cash,100% Financing
Road surface type: Paved

Estimated market value

$493,800

$469,000 - $518,000

$2,766/mo

Price history

Date	Event	Price
6/29/2026	Pending sale	$494,505$206/sqft
Source: LERA MLS #1994081 Report a problem
6/20/2026	Listed for sale	$494,505$206/sqft
Source: Chesmar Homes Report a problem

Public tax history

Year	Property taxes	Tax assessment
2025	$69 +18.9%	$2,940 +20%
2024	$58	$2,450
2023	--	$2,450

Find assessor info on the county website

Monthly payment

Est. payment

Payment breakdown

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Principal & interest
$1,547
Mortgage insurance
$0
Property taxes
$170
Home insurance
$105
HOA fees
$0
Utilities
Not included

All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.

HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.

Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.

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