3421 4th Street
Boulder, CO 80304
Map
- 6 beds
- 5 baths
- 5,198 sqft
- ~1/2 acre lot
- $1,394 per sqft
- 1990 build
- – on site
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.
Last checked:
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Last updated Jun 26, 2025
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MLS# IR1037712 —
This home is listed in more than one place. See it here.
Upcoming Open Houses
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Saturday, 6/28
12pm-4pm -
Sunday, 6/29
4pm-7pm
The Building
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Year Built:1990
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Construction Materials:Frame, Wood Siding
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Building Area Total:5198
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Building Area Source:Other
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Structure Type:House
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Roof:Composition
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Levels:Three Or More
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Basement:true
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Architectural Style:Contemporary
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Direction Faces:East
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Patio And Porch Features:Deck, Patio
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Window Features:Double Pane Windows
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Security Features:Smoke Detector(s)
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Above Grade Finished Area:3927
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Below Grade Finished Area:1271
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Property Attached:false
Interior
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Interior Features:Eat-in Kitchen, Five Piece Bath, Open Floorplan, Vaulted Ceiling(s), Walk-In Closet(s)
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Flooring:Wood
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Fireplace Features:Family Room, Gas, Gas Log, Living Room
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Laundry Features:In Unit
Room Dimensions
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Living Area:5198
Financial & Terms
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Possession:Close Plus 3 Days
Location
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Latitude:40.0375
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Longitude:-105.29249
The Property
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Property Type:Residential
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Property Subtype:Single Family Residence
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Parcel Number:R0108936
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Possible Use:Residential
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Zoning:RR-2
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Lot Features:Ditch, Open Space, Rolling Slope, Sprinklers In Front
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Lot Size Acres:0.6
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Lot Size SqFt:26,072 Sqft
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Exclusions:Furniture and Personal Property
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View:Mountain(s)
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Fencing:Fenced, Partial
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Vegetation:Wooded
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Road Frontage Type:Public
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Road Surface Type:Paved
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Water Mineral Rights:Water Rights
Listing Agent
- Contact info:
- Agent phone:
- (970) 531-7448
- Office phone:
- (970) 531-7448
Taxes
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Tax Year:2024
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Tax Annual Amount:$26,869
Beds
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Bedrooms Total:6
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Main Level Bedrooms:1
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Upper Level Bedrooms:4
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Lower Level Bedrooms:1
Baths
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Total Baths:5
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Full Baths:2
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Three Quarter Baths:2
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Half Baths:1
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Main Level Baths:2
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Upper Level Baths:2
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Basement Level Baths:1
Heating & Cooling
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HVAC Description:Evaporative Cooler,Ceilin
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Heating:Forced Air, Hot Water, Radiant
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Cooling:Ceiling Fan(s), Evaporative Cooling
Utilities
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Utilities:Cable Available, Electricity Available, Internet Access (Wired), Natural Gas Available
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Sewer:Public Sewer
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Sewer Tap:No
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Water Source:Public
Appliances
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Appliances:Dishwasher, Disposal, Down Draft, Microwave, Oven, Refrigerator, Self Cleaning Oven
Schools
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Elementary School:Foothill
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Elementary School District:Boulder Valley RE 2
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Middle Or Junior School:Centennial
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High School:Boulder
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High School District:Boulder Valley RE 2
The Community
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Subdivision Name:Fourth Street 3403 Sub
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Association:false
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Spa Features:Bath
Parking
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Parking Total:2
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Parking Features:Oversized
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Attached Garage:true
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Garage Spaces:2
Monthly cost estimate
Asking price
$7,250,000
| Expense | Monthly cost |
|---|---|
|
Mortgage
This calculator is intended for planning and education purposes only. It relies on assumptions and information provided by you regarding your goals, expectations and financial situation, and should not be used as your sole source of information. The output of the tool is not a loan offer or solicitation, nor is it financial or legal advice. |
$38,821
|
| Taxes | $2,239 |
| Insurance | $1,993 |
| Utilities | $184 See report |
| Total | $43,237/mo.* |
| *This is an estimate |
Walk Score®
Provided by WalkScore® Inc.
Walk Score is the most well-known measure of walkability for any address. It is based on the distance to a variety of nearby services and pedestrian friendliness. Walk Scores range from 0 (Car-Dependent) to 100 (Walker’s Paradise).
Bike Score®
Provided by WalkScore® Inc.
Bike Score evaluates a location's bikeability. It is calculated by measuring bike infrastructure, hills, destinations and road connectivity, and the number of bike commuters. Bike Scores range from 0 (Somewhat Bikeable) to 100 (Biker’s Paradise).
Transit Score®
Provided by WalkScore® Inc.
Transit Score measures a location's access to public transit. It is based on nearby transit routes frequency, type of route (bus, rail, etc.), and distance to the nearest stop on the route. Transit Scores range from 0 (Minimal Transit) to 100 (Rider’s Paradise).
Soundscore™
Provided by HowLoud
Soundscore is an overall score that accounts for traffic, airport activity, and local sources. A Soundscore rating is a number between 50 (very loud) and 100 (very quiet).
Air Pollution Index
Provided by ClearlyEnergy
The air pollution index is calculated by county or urban area using the past three years data. The index ranks the county or urban area on a scale of 0 (best) - 100 (worst) across the United Sates.
