635 Alpine Ave

Boulder, CO 80304

$1,000,000
Last Sold Price
3
Beds
1,906 Sq. Ft.
$525 / Sq. Ft.
1,906
Sq. Ft.
$525
per Sq. Ft.
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Sold 5/23/25Virtual Tour
Sold 5/23/25Virtual Tour
a black and white photo of a house
a living room with furniture and a potted plant
a living room with furniture and a wooden floor
a living room with furniture and a potted plant
a living room with furniture and a window
a workspace with furniture and window
a bedroom with a bed and a window
a living room with furniture and window
a living room with furniture and painting on the wall
a view of a dining room with furniture and wooden floor
a view of a dining room with furniture and window
a dining room with furniture and large windows
a bathroom with a sink and a mirror
a picture of a bathroom with a shower
a kitchen with granite countertop a stove a sink and a refrigerator
a kitchen with a sink cabinets and appliances
a kitchen with a sink and a stove top oven
a kitchen with kitchen island granite countertop a sink cabinets and window
a kitchen with granite countertop a refrigerator a stove a washer and dryer
a living room with furniture and a couch
a view of yard with trees
a view of a white house with a snow on the road

Description

A rare and versatile opportunity in the heart of West Boulder's beloved Newlands neighborhood. Set on an expansive 8,400-square-foot lot, this duplex-zoned property directly borders North Boulder Park, offering an exceptional canvas for redevelopment or a custom home in one of the city's most sought-after enclaves. The existing cottage includes a welcoming wraparound front porch, hardwood floors, and a flexible walk-out lower level with a private entrance and second kitchen-ideal for rental income...A rare and versatile opportunity in the heart of West Boulder's beloved Newlands neighborhood. Set on an expansive 8,400-square-foot lot, this duplex-zoned property directly borders North Boulder Park, offering an exceptional canvas for redevelopment or a custom home in one of the city's most sought-after enclaves. The existing cottage includes a welcoming wraparound front porch, hardwood floors, and a flexible walk-out lower level with a private entrance and second kitchen-ideal for rental income or multi-unit living as you plan your future project. The true value of this property lies in its unbeatable location. With North Boulder Park as your backyard, enjoy year-round recreation, from summer picnics and sports fields to groomed cross-country ski trails in winter. Just minutes away, you'll find Ideal Market, renowned dining, and the vibrant energy of Pearl Street, while nearby Mount Sanitas offers world-class hiking and outdoor adventure. An incredible setting, limitless potential, and a premier Boulder address-this is a rare opportunity to secure a coveted piece of real estate in one of the city's most desirable neighborhoods.

Listing Agents

  1. Zach Zeldner

    Zach Zeldner

    Listing Agent

    Compass

    zach.zeldner@compass.com

    P: (720)-480-7650

    CallTextEmail
  2. Ethan Bullock

    Ethan Bullock

    Alternative Listing Agent

    Compass

    ethan.bullock@compass.com

    P: (303)-501-4959

    CallTextEmail

Property Details for 635 Alpine Avenue

Locale
Boulder
Description 1
House
LISTING UPDATED: 10/20/2025 07:57 PM

Property Details for 635 Alpine Avenue

StatusSold
MLS #1028307
Days on Compass41
Taxes$8,559 / year
HOA Fees-
Condo/Co-op Fees-
Compass TypeMixed Use
MLS TypeResidential / Mixed Use
Year Built1909
Lot Size0.19 AC / 8,276 SF
CountyBoulder County
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Location

Sold By Coldwell Banker Realty 02, Zach Zeldner

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Building Information for 635 Alpine Avenue

Stories-Year Built1909Building Size-Lot Size0.19 AC / 8,276 SF

Payment Calculator

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$5,587 per month

30 year fixed, 6.15% Interest

Principal and Interest

$4,874

Property Taxes

$713

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

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Property Information for 635 Alpine Avenue

Summary
Location and General Information
  • Latitude: 40.03
  • Longitude: -105.29
Parking
  • Total Parking: 1.00
Taxes and HOA Information
  • Has HOA: No
  • HOA Fee: $.00
  • Legal Description: S150 FT LOT 16 BLK 26 NEWLANDS
  • Tax Information: No
  • HOA2 Fee Amount: $0
  • Tax Year: 2024
  • Tax Annual Amount: $8,559
  • Parcel Number: R0005377
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Property
Lot Information
  • Lot Improvements: Corner Lot, Evergreen Trees, Deciduous Trees, Abuts Park, House Faces South
  • Lot Size Area: 8,414.00
  • Has Irrigation Water Rights: No
  • Has Improvements: No
  • Vegetation: Wooded
Property and Assessments
  • Total Finished Area Source: Other
  • Living SqFt: 1906
  • Above Grade Finished Area Source: 1906
  • Sq Ft Apx: 0
  • Total Finished Area: 1906
  • Pano Url Position: 1
  • Are Ditches Active: No
  • New Construction YN: No
  • Levels: Two
Utilities
  • Electric: Xcel
  • Sewer: Public Sewer
  • Green Energy Efficient: Southern Exposure, Windows
Interior and Exterior Features
Exterior Features
  • Construction Materials: Wood Siding
  • Flooring: Wood
Interior Features
  • Interior Features: Separate Dining Room, Shared Primary Bath
  • Laundry Features: Electric Range, Refrigerator, Washer, Dryer, Microwave
  • Window Features: Window Coverings
  • All Bedrooms Conform: No
  • Full Bathrooms: 1
  • Half Bathrooms: 0
  • Rough-in Bathrooms: 0
  • Three Quarters Bathrooms: 1
  • Baths Full Additional: 0
  • Baths Full Basement: 0
  • Baths Full Upper: 0
  • Baths Full Main: 1
  • Baths Full Lower: 0
  • Baths Half Additional: 0
  • Baths Half Basement: 0
  • Baths Half Upper: 0
  • Baths Half Main: 0
  • Baths Half Lower: 0
  • Baths Three Quarters Additional: 0
  • Baths Three Quarters Basement: 0
  • Baths Three Quarters Lower: 1
  • Baths Three Quarters Upper: 0
  • Baths Three Quarters Main: 0
Room Information
Room 1
  • RoomDescription: Wood
  • RoomLength: 9.0
  • RoomLevel: Main
  • RoomType: Bedroom 2
  • RoomWidth: 9.0
Room 2
  • RoomDescription: Vinyl
  • RoomLength: 17.0
  • RoomLevel: Lower
  • RoomType: Bedroom 3
  • RoomWidth: 9.0
Room 3
  • RoomDescription: Luxury Vinyl
  • RoomLength: 10.0
  • RoomLevel: Main
  • RoomType: Dining Room
  • RoomWidth: 12.0
Room 4
  • RoomDescription: Luxury Vinyl
  • RoomLength: 11.0
  • RoomLevel: Main
  • RoomType: Family Room
  • RoomWidth: 11.0
Room 5
  • RoomDescription: Luxury Vinyl
  • RoomLength: 10.0
  • RoomLevel: Main
  • RoomType: Kitchen
  • RoomWidth: 8.0
Room 6
  • RoomDescription: Vinyl
  • RoomLevel: Main
  • RoomType: Laundry
Room 7
  • RoomDescription: Luxury Vinyl
  • RoomLength: 11.0
  • RoomLevel: Main
  • RoomType: Living Room
  • RoomWidth: 13.0
Room 8
  • RoomDescription: Wood
  • RoomLength: 9.0
  • RoomLevel: Main
  • RoomType: Primary Bedroom
  • RoomWidth: 12.0
  • Room Features: Shared Primary Bath
Rental
Rental Information
  • Horse YN: No
  • Occupant Type: Owner

Property History for 635 Alpine Avenue

DateEvent & SourcePriceAppreciation
May 23, 2025

Sold (Public Record)

Public Record #1558517735

$1,000,000

+4.4% / yr

Mar 15, 2012

Sold (Public Record)

Public Record #327863931

$570,000

-1.1% / yr

Jun 28, 2007

Sold (Public Record)

Public Record #223044672

$600,000—
DateEvent & SourcePrice
05/23/2025

Sold (Public Record)

Public Record #1558517735

$1,000,000

+4.4% / yr

03/15/2012

Sold (Public Record)

Public Record #327863931

$570,000

-1.1% / yr

06/28/2007

Sold (Public Record)

Public Record #223044672

$600,000

For completeness, Compass often displays two records for one sale: the MLS record and the public record.

Public Records for 635 Alpine Avenue

Taxable ValueLand$79,200Additions$8,800Total$88,000
Tax Record2025$8,552 ($713 / month)
Home Facts
Baths1.8Total Finished SqFt1,606 SqFtAbove Grade Finished SqFt939 SqFtFinished Basement SqFt667 SqFtStories1Lot Size8,407 SqFtStyleDuplexYear Built1909Year Renovated1994Zoning1115CountyBOULDERAPN1461-25-1-48-003

Schools near 635 Alpine Avenue

This home is within Boulder Valley Re 2 School District.
Rating
School
Type
Grades
Distance
Foothill Elementary School
Public - K to 5
Casey Middle School
Public - 6 to 8
Boulder High School
Public - 9 to 12
University Hill Elementary School
Public - PK to 5
Rating
School
Distance
Foothill Elementary School
PublicK to 5

Casey Middle School
Public6 to 8

Boulder High School
Public9 to 12

University Hill Elementary School
PublicPK to 5

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity. Subject to change at any time. Compass makes no guarantee, warranty or representation regarding the accuracy of any waterfront feature, water view or waterfront view.

Based on information submitted to the MLS GRID as of 10/20/2025 07:57 PM. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information. Properties displayed may be listed or sold by various participants in the MLS. IDX information is provided exclusively for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. The data is deemed reliable but is not guaranteed by MLS GRID. Use of the MLS GRID data may be subject to an end user license agreement prescribed by the applicable MLS of the Member Participant, if any, and as amended from time to time.