4007 Oak Knoll St

1st time on the market since built! Expansive two-story with 4,000+ sq/ft, featuring 5 bedrooms, 3.5 bathrooms, 3-car garage + an optional bedroom conversion as an ADU, office or shop at the heart of the Black Diamond Ranch subdivision bordering Pittsburg. Offering plenty of kitchen cabinetry and no-spare storage space with solid granite counter tops. Dual zone AC and heating systems. Grand primary bedroom with retreat. 2nd floor common area family loft/bonus room. Spacious, concrete-stamped low maintenance backyard with mature, abundant fruit trees and side-gated access for your RV, watercraft and other vehicles. 3rd-car tandem garage converted into a studio/storage room. Located in close proximity to parks, trails, shopping. Fast & easy access to Hwy 4 for a shorter commute. Enjoy partial Delta views and rolling hills. Great layout for an extended family living or even an at-home business opportunity?! Check your options and make it yours... https://my.matterport.com/show/?m=4QVqRk3CoFm

Current Status

New

Original Price

$879,900

List Price

$879,900

On Market Date

Sep 4, 2025

Property Type

Detached

D/N/S

Black Diamond

Zip Code

94509

MLS ID

41110312

APN

0896000387

Year Built

2011

Stories in Building

2

Possession

Close Of Escrow, See Remarks

Data Source

MAXEBRDI

Origin MLS System

CONTRA COSTA

Bed

5

Bath

3.5 (3/1)

Parking

3

Attached, Off Street, Side Yard Access, Tandem, Boat, Garage Faces Front, On Street, Garage Door Opener, RV Access/Parking, RV Possible

SQ FT

4,270

SQ FT Source

Public Records

Lot SQ FT

10,021.0

Lot Acres

0.23 Acres

Pool Info

None

Kitchen

Dishwasher, Double Oven, Gas Range, Plumbed For Ice Maker, Microwave, Oven, Range, Gas Water Heater, Stone Counters, Eat-in Kitchen, Disposal, Gas Range/Cooktop, Ice Maker Hookup, Kitchen Island, Oven Built-in, Pantry, Range/Oven Built-in, Wet Bar

Cooling

Central Air

Disclosures

Nat Hazard Disclosure

Entry Level

Exterior Details

Back Yard, Front Yard, Side Yard, Entry Gate, Low Maintenance, See Remarks

Flooring

Tile, Carpet

Foundation

Fire Place

Family Room

Heating

Zoned

Laundry

Laundry Room, Upper Level

Upper Level

4 Bedrooms, 3 Baths, Laundry Facility, Loft

Main Level

1 Bedroom, 0.5 Bath, Main Entry

Views

Delta, Hills

Possession

Close Of Escrow, See Remarks

Architectural Style

Contemporary

Construction Status

Existing

Additional Miscellaneous Features

Back Yard, Front Yard, Side Yard, Entry Gate, Low Maintenance, See Remarks

Location

Cul-De-Sac, Other, Back Yard, Front Yard

Roof

Slate

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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