Prevu by reAlpha
BuySellBlogBrowse Listings

3421 4th StreetBoulder, CO 80304

For Sale

$7,250,000

Smart Buyer Rebate $72,500

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.

Listed by Kathleen Haas

·

License #IRP00465

·

Colorado Realty 4 Less, LLC

·

970-531-7448

Last updated December 14, 2025

·

Source: REcolorado #IR1037712

Listing Facts

  • TypeSingle-family
  • NeighborhoodJuniper - Kalmia
  • Bedrooms6
  • Bathrooms5
  • Days on Prevu173
  • Taxes$26,869/year
  • Size5,198 sqft
  • Price per sqft$1,395

Amenities

  • Dishwasher
  • Private Outdoor Space
  • Parking

Location

Mortgage Calculator

Listing History

06/25/2025
Listed by Colorado Realty 4 Less, LLC
$7,250,000

Property Details for 3421 4th Street

Exterior

Construction

  • Roof: Composition
  • Structure Type: House
  • Window Features: Double Pane Windows
  • Year Built: 1990
  • Architectural Style: Contemporary
  • Construction Materials: Frame, Wood Siding

Features

  • Direction Faces: East
  • Fencing: Fenced, Partial
  • Patio And Porch Features: Deck, Patio
  • Road Frontage Type: Public
  • View: Mountain(s)

Measurements

  • Building Area Total: 5,198
  • Lot Features: Ditch, Open Space, Rolling Slope, Sprinklers In Front
  • Lot Size Acres: 0.60
  • Lot Size Square Feet: 26,072

Financial

Taxes

  • Parcel Number: R0108936
  • Tax Annual Amount: $26,869.00
  • Tax Year: 2024

Interior

Features

  • Appliances: Dishwasher, Disposal, Down Draft, Microwave, Oven, Refrigerator, Self Cleaning Oven
  • Fireplace Features: Family Room, Gas, Gas Log, Living Room
  • Flooring: Wood
  • Interior Features: Eat-in Kitchen, Five Piece Bath, Open Floorplan, Vaulted Ceiling(s), Walk-In Closet(s)
  • Spa Features: Bath

Measurements

  • Living Area: 5,198

Rooms

  • Basement: Daylight, Full
  • Has Basement: Yes
  • Bathrooms Full: 2
  • Bathrooms Half: 1
  • Bathrooms Three Quarter: 2
  • Bathrooms Total Integer: 5
  • Bedrooms Total: 6
  • Main Level Bathrooms: 2
  • Main Level Bedrooms: 1

Other

General

  • Exclusions: Furniture and Personal Property

Location

  • Subdivision Name: Fourth Street 3403 Sub

Parking

Parking

  • Attached Garage: Yes
  • Garage Spaces: 2
  • Parking Features: Oversized
  • Parking Total: 2

Schools

Elementary School

  • Elementary School: Foothill
  • Elementary School District: Boulder Valley RE 2

High School

  • High School: Boulder
  • High School District: Boulder Valley RE 2

Middle or Junior School

  • Middle Or Junior School: Centennial

Utilities

Equipment

  • Cooling: Ceiling Fan(s), Evaporative Cooling
  • Heating: Forced Air, Hot Water, Radiant
  • Laundry Features: In Unit
  • Sewer: Public Sewer
  • Utilities: Cable Available, Electricity Available, Internet Access (Wired), Natural Gas Available
  • Water Source: Public

Frequently Asked Questions

How many bedrooms and bathrooms does this single-family home have?

There are 6 bedrooms and 5 bathrooms in this single-family home at 3421 4th Street.

What schools are nearby to 3421 4th Street?

Nearby schools include the Foothill Elementary School, Centennial Middle School, and Boulder High School.

Does this single-family home have parking?

Yes, there are 2 parking spaces available for 3421 4th Street.

What are the annual taxes for 3421 4th Street?

Annual taxes for this single-family home are estimated at $26,869.

How does 3421 4th Street compare to other single-family homes in Juniper - Kalmia?

This single-family home is listed 26% below the average price for single-family homes in Juniper - Kalmia and has been on the market for 134 more days than the typical home in this area.

What is the square footage on this single-family home?

According to the MLS, this listing is 5,198 sqft.

3421 4th Street is a 6-bedroom, 5-bath single-family home for sale in Boulder CO 80304. Listed on Prevu for 173 days at $7,250,000. This home features 5,198 square feet of living space, located in Juniper - Kalmia. The median listing price for single-family homes in this area is $4,500,000. Nearby schools include Foothill Elementary School, Centennial Middle School, and Boulder High School. Additional amenities include private outdoor space, dishwasher, and parking. Browse more single-family home listings in Boulder.

The content relating to real estate for sale in this Web site comes in part from the Internet Data eXchange ("IDX") program of METROLIST, INC., DBA RECOLORADO® Real estate listings held by brokers other than Prevu are marked with the IDX Logo. This information is being provided for the consumers' personal, non-commercial use and may not be used for any other purpose. All information subject to change and should be independently verified.

Full MLS Disclaimers

Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.