3421 4th Street, Boulder, CO

$7,250,000

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6

Beds

5

Baths

5,198

Square feet

0.60

Acres

About 3421 4th Street

Once-in-a-generation chance to own a Newlands sanctuary backing directly to Mt. Sanitas. On open space - one of only eight homes on 4th St. with this privilege. Tucked up a private, tree-lined drive, the 5,200 sq ft residence sits on a rare 0.6-acre garden oasis framed by apple trees, lavender beds, and the historic Silver Lake Ditch. Inside, light pours through west-facing walls of glass and 20-ft ceilings, capturing ever-changing mountain panoramas. Oak floors run throughout the main level, complementing the warmth of two fireplaces - one in the dramatic living room, another in the cozy library. The flexible layout offers six bedrooms plus an office, highlighted by two king-sized primary suites (one on the top floor, one garden-level with 12.5-ft ceilings, private patio, and separate entrance) - ideal for multigenerational living, guests, or an au pair. Gather in the open kitchen that flows into living and dining areas, spill onto the wrap-around porch for morning coffee under a 60-ft maple, then follow your own gate straight to miles of trail. Evenings bring alpenglow views, cider-press parties with fruit from your orchard, and starlit conversations with a cricket chorus. Secluded yet minutes to Pearl St., Ideal Market, and Boulder's top-rated schools. Newlands is prized for its friendly vibe, where neighbors walk dogs and ride bikes along peaceful, tree-lined streets, gathering for block parties and bonding over a shared love of the outdoors. Homes that touch open space here rarely trade hands. If you've been waiting for privacy, views, and community in one package, this is the opportunity.

Features of 3421 4th Street

MLS® # IR1037712
Price $7,250,000
Bedrooms 6
Bathrooms 5.00
Full Baths 2
Half Baths 1
Square Footage 5,198
Acres 0.60
Year Built 1990
Type Residential
Sub-Type Single Family Residence
Style Contemporary
Status Active

Community Information

Address 3421 4th Street
Subdivision Fourth Street 3403 Sub
City Boulder
County Boulder
State CO
Zip Code 80304

Amenities

Utilities Cable Available, Electricity Available, Internet Access (Wired), Natural Gas Available
Parking Spaces 2
Parking Oversized
# of Garages 2
View Mountain(s)
Is Waterfront No
Has Pool No

Interior

Interior Features Eat-in Kitchen, Five Piece Bath, Open Floorplan, Vaulted Ceiling(s), Walk-In Closet(s)
Appliances Dishwasher, Disposal, Down Draft, Microwave, Oven, Refrigerator, Self Cleaning Oven
Heating Forced Air, Hot Water, Radiant
Cooling Ceiling Fan(s), Evaporative Cooling
Fireplace Yes
Fireplaces Family Room, Gas, Gas Log, Living Room
Stories Three Or More

Exterior

Lot Description Ditch, Open Space, Rolling Slope, Sprinklers In Front
Windows Double Pane Windows
Roof Composition

School Information

District Boulder Valley RE 2
Elementary Foothill
Middle Centennial
High Boulder

Additional Information

Date Listed June 25th, 2025
Zoning RR-2
Foreclosure No
Short Sale No
RE / Bank Owned No

Listing Details

OfficeColorado Realty 4 Less, LLC

Listing Map

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