A rare opportunity to own two contiguous parcels in The Peninsula at Mystic Shores — 144 Serene (~6 acres with residence) and 138 Serene (~4 acres) — delivering ~10 acres and approximately 1,200+ linear feet of Canyon Lake shoreline spanning the main shore and cove (buyer to verify). Together, the property offers unmatched privacy, water access, and lifestyle, with a private on-site boat launch/ramp. The main residence showcases soaring 24-ft beamed ceilings, an open layout filled with natural light, and wall-to-wall windows framing panoramic lake views. The chef’s kitchen with double ovens and custom cabinetry flows to casual and formal dining and expansive outdoor living with a kitchen and fireplace. The primary retreat offers a stone-clad fireplace, spa bath, and water panoramas. Two main-level offices, plus upstairs media and game rooms with wet bar, ensure year-round enjoyment. Outdoors, an infinity-edge pool with rock waterfalls anchors the setting, with a gently sloping lawn to the water’s edge. An attached four-car garage includes a covered boat bay and workshop. A private irrigation well and high-speed internet provide modern convenience. Adding the adjacent 4-acre tract expands your usable shoreline, increases privacy, and opens possibilities for future amenities or guest quarters. Ownership in Mystic Shores includes a 26-acre lake park with resort pool, tennis & pickleball, sand volleyball, trails, and more.
Active
Price cut: $100K (11/13)
$2,690,000
138 Serene St, Spring Branch, TX 78070
4beds
5,338sqft
Est.:
Single Family Residence
Built in 2007
10.03 Acres Lot
$-- Zestimate®
$504/sqft
$50/mo HOA
What's special
Two main-level officesUnmatched privacySpa bathAttached four-car garageCustom cabinetryWater access
- 87 days |
- 293 |
- 21 |
Zillow last checked: 8 hours ago
Listing updated: November 12, 2025 at 08:50pm
Listed by:
Monica Fabbio 5128258891,
Christie's Int'l Real Estate (512) 270-8586
Source: Unlock MLS,MLS#: 5929912
Tour with a local agent
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 5
- Full bathrooms: 4
- 1/2 bathrooms: 1
- Main level bedrooms: 3
Heating
- Central, Electric
Cooling
- Central Air
Appliances
- Included: Built-In Oven(s), Cooktop, Dishwasher, Disposal, Microwave, Double Oven, Refrigerator
Features
- Breakfast Bar, Built-in Features, Ceiling Fan(s), High Ceilings, Double Vanity, Eat-in Kitchen, Kitchen Island, Multiple Living Areas, Primary Bedroom on Main, Walk-In Closet(s), Wet Bar
- Flooring: Tile, Wood
- Windows: Double Pane Windows
- Number of fireplaces: 3
- Fireplace features: Bedroom, Living Room, Outside
Interior area
- Total interior livable area: 5,338 sqft
Video & virtual tour
Property
Parking
- Total spaces: 4
- Parking features: Boat, Circular Driveway, Garage, Garage Door Opener, Garage Faces Side, RV Access/Parking
- Garage spaces: 4
Accessibility
- Accessibility features: None
Features
- Levels: Two
- Stories: 2
- Patio & porch: Covered, Patio, Porch, Rear Porch
- Exterior features: Balcony, Barbecue, Boat Ramp, Restricted Access
- Has private pool: Yes
- Pool features: In Ground, Infinity
- Fencing: None
- Has view: Yes
- View description: Hill Country, Lake, Panoramic, Pool, Skyline, Water
- Has water view: Yes
- Water view: Lake,Water
- Waterfront features: Lake Front, Waterfront
- Body of water: Canyon Lake
Lot
- Size: 10.03 Acres
- Features: Cul-De-Sac, Front Yard, Gentle Sloping, Landscaped, Rock Outcropping, Sprinkler - Automatic, Many Trees, Views
Details
- Additional structures: Garage(s)
- Has additional parcels: Yes
- Parcel number: 121014
- Special conditions: Standard
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence
Materials
- Foundation: Slab
- Roof: Concrete, Tile
Condition
- Updated/Remodeled
- New construction: No
- Year built: 2007
Utilities & green energy
- Sewer: Aerobic Septic, Septic Tank
- Water: Private, Well
- Utilities for property: Electricity Available, Phone Available, Sewer Connected, Water Connected
Community & HOA
Community
- Features: Common Grounds, Controlled Access, Fishing, Gated, Lake, Picnic Area
- Subdivision: Peninsula Mystic Shores 2
HOA
- Has HOA: Yes
- Services included: Common Area Maintenance, Security
- HOA fee: $50 monthly
- HOA name: Peninsula at Mystic Shores
Location
- Region: Spring Branch
Financial & listing details
- Price per square foot: $504/sqft
- Tax assessed value: $556,400
- Annual tax amount: $8,199
- Date on market: 9/17/2025
- Listing terms: Cash,Conventional
- Electric utility on property: Yes
Estimated market value
Not available
Estimated sales range
Not available
Not available
Price history
Price history
| Date | Event | Price |
|---|---|---|
| 11/13/2025 | Price change | $2,690,000-3.6%$504/sqft |
Source:  Unlock MLS #4563172 Report a problem | ||
| 9/17/2025 | Listed for sale | $2,790,000+833.1%$523/sqft |
Source: Unlock MLS #5929912 Report a problem | ||
| 3/31/2017 | Sold | -- |
Source:  Central Texas MLS #206051 Report a problem | ||
| 2/17/2016 | Listed for sale | $299,000$56/sqft |
Source: BLUE WATER REAL ESTATE #206051 Report a problem | ||
Public tax history
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | -- | $556,400 +3.5% |
| 2024 | $7,920 -6.7% | $537,430 -5.6% |
| 2023 | $8,486 -20.3% | $569,050 -10% |
Find assessor info on the county website
BuyAbility℠ payment
Est. payment
$16,760/mo
Principal & interest
$13190
Property taxes
$2578
Other costs
$992
Climate risks
Neighborhood: 78070
Nearby schools
GreatSchools rating
- 8/10Rebecca Creek Elementary SchoolGrades: PK-5Distance: 1.8 mi
- 8/10Mt Valley Middle SchoolGrades: 6-8Distance: 9.1 mi
- 6/10Canyon Lake High SchoolGrades: 9-12Distance: 5.7 mi
Schools provided by the listing agent
- Elementary: Rebecca Creek
- Middle: Mountain Valley Middle
- High: Canyon Lake
- District: Comal ISD
Source: Unlock MLS. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.
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