139 Oak St

Introducing a newly constructed 2026 Honomobo HO5 in St. Helena a bold, sophisticated residence designed to celebrate light, landscape, and effortless Wine Country living. More than 60 feet of floor-to-ceiling glass stretches across the home, drawing the surrounding hills, mature trees, and colorful evening skies into nearly every room. Expansive accordion doors dissolve the boundary between the interior and the custom wraparound deck, creating an extraordinary environment for entertaining, outdoor dining, or simply watching the sun settle over the valley. Inside, approximately 1,600 square feet of thoughtfully designed living space includes three bedrooms, two and one half baths, engineered hardwood flooring, modern appliances, contemporary electronics, and clean architectural finishes. Energy-efficient heat-pump heating and air conditioning and a heat-pump water heater bring next-generation comfort to the home. A custom-built two-car garage, generous additional parking, sculptural water features, natural stonework, and warm wood and steel accents complete a property unlike anything else currently offered in St. Helena.

Current Status

Active - Coming Soon

Original Price

$1,895,000

List Price

$1,895,000

On Market Date

Aug 12, 2026

Property Type

Detached

D/N/S

Not Listed

Zip Code

94574

MLS ID

41144661

APN

021174003000

Year Built

2026

Stories in Building

1

Possession

Close Of Escrow

Data Source

MAXEBRDI

Origin MLS System

CONTRA COSTA

Bed

3

Bath

2.5 (2/1)

Parking

2

Detached

SQ FT

1,540

SQ FT Source

Other

Lot SQ FT

46,664.0

Lot Acres

1.07 Acres

Pool Info

None

Kitchen

Dishwasher, Electric Range, Refrigerator, Dryer, Washer, 220 Volt Outlet, Counter - Solid Surface, Electric Range/Cooktop, Kitchen Island, Pantry

Cooling

Heat Pump

Disclosures

Nat Hazard Disclosure, Other - Call/See Agent

Entry Level

Exterior Details

Back Yard, Front Yard, Garden/Play, Side Yard, Terraced Back, Terraced Down, Landscape Back, Landscape Front

Flooring

Tile, Engineered Wood

Foundation

Fire Place

None

Heating

Heat Pump

Laundry

Dryer, Laundry Room, Washer

Main Level

3 Bedrooms, 2.5 Baths, Laundry Facility, Main Entry

Possession

Close Of Escrow

Architectural Style

Modern/High Tech

Additional Miscellaneous Features

Back Yard, Front Yard, Garden/Play, Side Yard, Terraced Back, Terraced Down, Landscape Back, Landscape Front

Location

Sloped Down, Premium Lot, Secluded, Back Yard, Front Yard, Landscaped

Roof

Other

Water and Sewer

Public

Fee

Unavailable

MLS and other Information regarding properties for sale as shown in Theo have been obtained from various sources such as sellers, public records, agents and other third parties. This information may relate to the condition of the property, permitted or unpermitted uses, zoning, square footage, lot size/acreage or other matters affecting value or desirability. Unless otherwise indicated in writing, neither brokers, agents nor Theo have verified, or will verify, such information. If any such information is important to buyer in determining whether to buy, the price to pay or intended use of the property, buyer is urged to conduct their own investigation with qualified professionals, satisfy themselves with respect to that information, and to rely solely on the results of that investigation.

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