Last Sold Price
5 beds4,101 sqft$658/sqft
421 Baseline Rd, Boulder, CO 80302

Description

Lush, secluded site on the very west of Baseline-small private road right across from beautiful Chautauqua Park. Enjoy spectacular, up close Flatiron views from this mid-century modern home. Period architectural details with paneled, vaulted and beamed ceilings, retro kitchen, walls of glass, 3 fireplaces (gas) and over 4100 sq ft to work with. Sprawling ranch with a full walk-out lower level and several incredible outdoor living spaces. All original condition and ready for a top to bottom renovation....Lush, secluded site on the very west of Baseline-small private road right across from beautiful Chautauqua Park. Enjoy spectacular, up close Flatiron views from this mid-century modern home. Period architectural details with paneled, vaulted and beamed ceilings, retro kitchen, walls of glass, 3 fireplaces (gas) and over 4100 sq ft to work with. Sprawling ranch with a full walk-out lower level and several incredible outdoor living spaces. All original condition and ready for a top to bottom renovation. In its prime, the outdoor living spaces overlooked a forest of trees and flowering gardens with seasonal Gregory Creek flowing at the west edge of the property. 15,926 square foot lot at the base of Flagstaff Mountain. Big square footage ready for your 21st century redesign. Please contact listing agent for interior picture availability.
LISTING CLOSED: 06/28/2023 12:00 AM

  1. Listed by Brian Hellwig • RE/MAX of Boulder, Inc
    P: (303) 818-6592 C: (303) 818-6592 brianhellwig@boulderco.com
  2. Listed by Brian Hellwig • RE/MAX of Boulder, Inc
    P: (303) 818-6592 C: (303) 818-6592 brianhellwig@boulderco.com

Property Details for 421 Baseline Road

Status
MLS #
982962
Days on Compass
115
Taxes
$10,656 / year
HOA Fees
-
Condo/Co-op Fees
-
Property Type
MLS Type
Residential / Single Family Residence
Year Built
1956
Lot Size
0.37 AC / 16,117 SF
Locale
Boulder
Description 1
House

Recent comparable sales

Median sold price

$2,561,250

Avg days on market

63

Sale-to-list ratio

95.6%

Boulder, CO

9 comparable properties found

a front view of a house with a yard
1/41
1

$2,450,000

Sold 11/21/24

5
Bedrooms
3,407
Square Feet
0.21
Acres
$2,472,500 | 1021 9th Street, Boulder, CO 80302
1/47
2

$2,472,500

Sold 05/14/26

5
Bedrooms
3,743
Square Feet
0.14
Acres
$2,850,000 | 2695 Stanford Avenue, Boulder, CO 80305
1/38
3

$2,850,000

Sold 08/28/25

5
Bedrooms
4,641
Square Feet
1.02
Acres
$2,651,475 | 2449 5th Street, Boulder, CO 80304
1/50
4

$2,651,475

Sold 05/26/26

5
Bedrooms
3,549
Square Feet
0.17
Acres
a front view of a house with a yard
1/41
5

$2,300,000

Sold 12/09/24

5
Bedrooms
4,018
Square Feet
0.35
Acres
$3,200,000 | 630 Northstar Court, Boulder, CO 80304
1/51
6

$3,200,000

Sold 06/10/26

5
Bedrooms
3,654
Square Feet
0.21
Acres
aerial view of a house with swimming pool and a yard
1/41
7

$2,650,000

Sold 07/25/25

5
Bedrooms
3,613
Square Feet
1.28
Acres
a front view of a house with a yard and trees
1/41
8

$2,950,000

Sold 09/08/25

5
Bedrooms
3,840
Square Feet
0.21
Acres
a view of a house with pool and a yard
1/42
9

$1,980,000

Sold 05/22/26

5
Bedrooms
4,085
Square Feet
0.18
Acres

Location

Listing Courtesy of RE/MAX of Boulder, Inc, Brian Hellwig; RE/MAX of Boulder, Inc, Brian Hellwig

Sold By Compass - Boulder, Kiki Kidder

Add your commute

Building Information for 421 Baseline Road

Stories-Year Built1956Building Size-Lot Size0.37 AC / 16,117 SF

Payment Calculator

Get preapproved with
OriginPoint Mortgage or Rocket Mortgage1

$14,612 per month

30 year fixed, 6.55% Interest

Principal and Interest

$13,724

Property Taxes

$888

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

Know your buying power with a preapproval and custom rate in minutes

Rocket Mortgage1

Property Information for 421 Baseline Road

Summary
Location and General Information
  • Latitude: 40.00
  • Longitude: -105.29
Parking
  • Total Parking: 2.00
Taxes and HOA Information
  • Has HOA: No
  • HOA Fee: $.00
  • Legal Description: LOT 11 LESS TRI IN NWLY PT WILLOWBROOK & TRI IN SELY PT OF TRACT 2126 & TRACT 2199 36-1N-71
  • Tax Information: No
  • HOA2 Fee Amount: $0
  • Tax Year: 2022
  • Tax Annual Amount: $10,656
  • Parcel Number: R0003177
Property
Lot Information
  • Lot Improvements: Cul-De-Sac, Wooded
  • Lot Size Area: 15,927.00
  • Has Irrigation Water Rights: No
  • Has Improvements: No
  • Vegetation: Wooded
Property and Assessments
  • Total Finished Area Source: Other
  • Living SqFt: 3895
  • Above Grade Finished Area Source: 3895
  • Sq Ft Apx: 0
  • Total Finished Area: 3895
  • Property Attached YN: No
  • Are Ditches Active: No
  • New Construction YN: No
  • Levels: One
Utilities
  • Electric: Xcel
  • Sewer: Public Sewer
  • Green Energy Efficient: Southern Exposure
Interior and Exterior Features
Exterior Features
  • Construction Materials: Frame, Brick
  • Exterior Features: Balcony
Interior Features
  • Laundry Features: Electric Range, Dishwasher, Refrigerator, Bar Fridge, Washer, Dryer, Disposal
  • Window Features: Window Coverings
  • Fireplaces 1: Two or More, Gas, Living Room, Bedroom, Basement
  • All Bedrooms Conform: Yes
  • Full Bathrooms: 1
  • Half Bathrooms: 0
  • Rough-in Bathrooms: 0
  • Three Quarters Bathrooms: 2
  • 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: 1
Room Information
Room 1
  • RoomDescription: Wood
  • RoomLength: 10.0
  • RoomLevel: Lower
  • RoomType: Bedroom 2
  • RoomWidth: 10.0
Room 2
  • RoomDescription: Carpet
  • RoomLength: 11.0
  • RoomLevel: Lower
  • RoomType: Bedroom 3
  • RoomWidth: 9.0
Room 3
  • RoomDescription: Wood
  • RoomLength: 15.0
  • RoomLevel: Lower
  • RoomType: Bedroom 4
  • RoomWidth: 10.0
Room 4
  • RoomLength: 21.0
  • RoomLevel: Main
  • RoomType: Bedroom 5
  • RoomWidth: 12.0
Room 5
  • RoomDescription: Carpet
  • RoomLength: 12.0
  • RoomLevel: Main
  • RoomType: Dining Room
  • RoomWidth: 10.0
Room 6
  • RoomDescription: Tile
  • RoomLength: 30.0
  • RoomLevel: Lower
  • RoomType: Family Room
  • RoomWidth: 24.0
Room 7
  • RoomDescription: Wood
  • RoomLength: 17.0
  • RoomLevel: Main
  • RoomType: Kitchen
  • RoomWidth: 9.0
Room 8
  • RoomDescription: Carpet
  • RoomLength: 26.0
  • RoomLevel: Main
  • RoomType: Living Room
  • RoomWidth: 15.0
Room 9
  • RoomDescription: Carpet
  • RoomLength: 33.0
  • RoomLevel: Main
  • RoomType: Primary Bedroom
  • RoomWidth: 15.0
Room 10
  • RoomDescription: Wood
  • RoomLength: 19.0
  • RoomLevel: Lower
  • RoomType: Study
  • RoomWidth: 16.0
Rental
Rental Information
  • Horse YN: No
  • Occupant Type: Tenant

Property History for 421 Baseline Road

DateEvent & SourcePriceAppreciation
Jun 28, 2023

Sold (Public Record)

Public Record #1514730216

$2,700,000
DateEvent & SourcePrice
06/28/2023

Sold (Public Record)

Public Record #1514730216

$2,700,000

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

Public Records for 421 Baseline Road

Taxable ValueLand$131,256Additions$14,584Total$145,840
Tax Record2025$12,781 ($1,065 / month)
Home Facts
Beds4Baths1.8Total Finished SqFt5,360 SqFtAbove Grade Finished SqFt3,632 SqFtFinished Basement SqFt1,728 SqFtStories1Lot Size15,927 SqFtStyleSingle Family ResidenceYear Built1956Year Renovated1975ZoningFCountyBOULDERAPNR0003177

Schools near 421 Baseline Road

This home is within Boulder Valley Re 2 School District.
Rating
School
Type
Grades
Distance
Public - K to 5
Public - 6 to 8
Public - 9 to 12
Public - PK to 5
Rating
School
Distance
Flatirons Elementary School
PublicK to 5

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.

Similar Homes

New listings in 80302

$2,300,000 | 2939 South Lakeridge Trail, Boulder, CO 80302
1/26

MLS #1066749

Listed By CompassOpen: 8/20 02:00PM - 04:00PM

$2,300,000

3
Bedrooms
2,399
Square Feet
0.86
Acres
$2,227,000 | 1116 6th Street, Boulder, CO 80302
1/50

Denise Patryas • MLS #1066811

New

$2,227,000

3
Bedrooms
2,677
Square Feet
0.19
Acres
$995,000 | 8200 Fourmile Canyon Drive, Boulder, CO 80302
1/40

MLS #1066676

Compass Coming Soon

$995,000

4
Bedrooms
3,271
Square Feet
7.73
Acres
$4,650,000 | 512 Marine Street, Boulder, CO 80302
1/46

RE/MAX of Boulder, Inc • MLS #1066712

New

$4,650,000

4
Bedrooms
5,048
Square Feet
0.23
Acres
$520,000 | 2301 Pearl Street, Unit 49, Boulder, CO 80302
1/17

LIV Sotheby's Intl Realty • MLS #1066653

$520,000

1
Bedrooms
473
Square Feet
$1,695,000 | 1633 17th Street, Unit B, Boulder, CO 80302
1/32

Live West Realty • MLS #1066599

$1,695,000

2
Bedrooms
1,733
Square Feet
$1,425,000 | 1629 17th Street, Unit B, Boulder, CO 80302
1/34

Live West Realty • MLS #1066600

Active / Backup

$1,425,000

2
Bedrooms
1,608
Square Feet
$450,000 | 2201 Pearl Street, Unit 103, Boulder, CO 80302
1/35

Your Castle Realty LLC • MLS #2948802

$450,000

1
Bedrooms
667
Square Feet
$9,995,000 | 333 Bellevue Drive, Boulder, CO 80302
1/50

Madison & Company Properties - Boulder • MLS #1066504

Virtual Tour

$9,995,000

5
Bedrooms
8,427
Square Feet
0.89
Acres

Nearby home values

AddressSold priceBedsBathsSqftLot (Sqft)
This home: 421 Baseline Road, Boulder, CO 80302
$2,700,000
5
4,101
16,117
3
1.75
2,232
13,244
4
3
4,186
16,522
$1,707,500
4
4.25
5,313
13,232
$1,555,200
5
2
13,090
2
1.5
1,825
16,834

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of any information, descriptions or measurements (including square footage measurements and property condition), such should be independently verified through appropriate means, including, but not limited to, in person inspection and public records, and Compass International Holdings, its subsidiaries, affiliates and independently owned and operated franchisees, and their affiliated agents and associated third parties expressly disclaim 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 seller's discretion. No financial or legal advice provided. Equal Housing Opportunity. Subject to change at any time. Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties make no guarantee, warranty or representation regarding the accuracy of any waterfront feature, water view or waterfront view.

Listing Courtesy of RE/MAX of Boulder, Inc, Brian Hellwig; RE/MAX of Boulder, Inc, Brian Hellwig

Based on information submitted to the MLS GRID as of 10/20/2025 07:42 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.