See Home Value
$2,609,700
● House - Off Market

721 9th St

Boulder, CO 80302
bedrooms
4 Beds
bathrooms
2 Baths
square feet
2,793 Ft²
$14,611
Est. Monthly
0.86%
Cap Rate

About This Property

Nestled on a rare quadruple lot just steps from Chautauqua Park, this 1911 Craftsman-style home offers breathtaking views and thoughtful modern updates. Refined interiors and exquisite attention to detail combined with expansive outdoor spaces, breathtaking views of the Flatirons and Mt Sanitas, and proximity to iconic outdoor recreation and cultural opportunities make this home an exceptional Boulder retreat. This property includes 3 buildings on an oversized 1/4 acre lot, creating a small compound in the city. The historic main house offers light-filled living spaces with 9' ceilings, stained white oak floors, a gourmet kitchen with generous island and a picturesque dining room with giant picture windows and indoor-outdoor connectivity. The pristine primary suite offers its own sanctuary with wired sound system, double closets, ensuite bathroom and dual closets. A finished walkout lower level adds flexibility with guest quarters, storage and a mudroom. The detached guest house allows for additional flexibility with a main level studio space, 3/4 bathroom and upper level bedroom with a private balcony, while the original carriage house - insulated and electrified - offers a serene, creative space. Escape to the lush, landscaped, private backyard offering a flagstone patio, fruit trees, raised garden beds, and an expansive, level sports field ideal for a variety of recreational activities or large-scale entertaining. With ample parking, a single car garage + 2 additional parking spaces with an EV charger, and potential for future development, this is a must-see property and a rare opportunity in one of Boulder's most sought-after enclaves.
Unit Size
2,793 Ft²
Days on Market
-
Land Size
0.29 acres
Price per sqft
$984
Property Type
House
Property Taxes
$1,113
HOA Dues
-
Year Built
1911

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Last updated: 10 months ago (IRES MLS #1033886)

Price History

Date / Event Date Event Price
Dec 12, 2025 Sold
Sold
Oct 20, 2025 Price Decreased $2,749,000
↓ $41K (1.5%)
Price Decreased
Jun 17, 2025 Price Decreased $2,790,000
↓ $60K (2.1%)
Price Decreased
May 13, 2025 Listed by milehimodern - Boulder $2,850,000
Listed by milehimodern - Boulder
Aug 29, 2012 Sold
Sold
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Property Highlights

Garage
Air Conditioning
Fireplace

Building Info

Overview

    General

  • Year Built: 1911
  • Effective Year Built: 1990
  • Building Count: 2
  • Total Rooms: 10
  • Bedroom Count: 4
  • Bathroom Count: 4
  • Full Bathrooms: 3
  • Partial Bathrooms: 4
  • Building Condition: 3
  • Building Quality: 4
  • Construction Type: 12
  • Building Style: 0
  • Exterior Walls Type: 23
  • Interior Walls Type: 3
  • Roof Shape Type: 0
  • Roof Cover Type: 15
  • Floor Count: 200
  • Living Units: 1
  • Floor Cover: 0
  • Basement Type: 3
  • Basement Area: 572
  • Garage Type: 4
  • Garage Square Area: 240
  • Parking Space Count: 1
  • Patio Type: 20
  • Porch Type: 8
  • Pool Type: 0

    Dimensions

  • Lot Size Square Feet: 12,525
  • Total Building Area: 2,759
  • Gross Building Area: 2,759
  • Building Area: 2,759
  • Building Area Measurement: L

    Heating and Cooling

  • Air Conditioning: 1
  • Heating: 4
  • Heated Square Feet: 2,759
  • Heating Fuel Type: 0

    Utilities

  • Sewer System: 0
  • Water Service: 0

Building

  • Building Type: 0
  • Property Class: R
  • Subdivision: CHAUTAUQUA HEIGHTS - BO
  • Land Acres: 0000000288
  • Standard Land Use Code: 1001
  • County Land Use Code: 1112
  • Legal Description 1: LOTS 9-12 BLK 2 CHAUTAUQUA HEIGHTS SPLIT TO ID 1027/OWNER 7/95 ID 1027 COMB BACK HERE 3/97

Neighborhood

  • School District Name: Boulder Valley School District RE-2
  • Census Tract: 012201

Geography

  • Assessors Map Reference: B17-J
  • Account Number: R0001029
  • Parcel: R0001029
  • Block: 2
  • Lot: 11
  • Meridian: SEC 36 TWN 1N RNG 71
  • Municipality: BOULDER
  • Latitude: 40.001
  • Longitude: -105.282

    Address

  • Full Address: 721 9th St
  • Address - House Number: 721
  • Address - Street Name: 9th
  • Address - Suffix Type: St
  • State: CO
  • City Name: Boulder
  • Carrier Code: C010
  • 4-Digit Zip Code: 7526
  • Zip Code: 80302

Valuation

    Tax

  • Tax Year: 2022
  • Tax Amount: $1,149,146
  • Tax Rate Code Area: 00-010

    Appraisal Valuation

  • Standard Deviation: 0.1732
  • Valuation Date: May 17, 2023
  • Confidence Score: 77
  • Final Value: 2,454,535
  • High Value: 2,879,669
  • Low Value: 2,029,401

    Market Valuation

  • Market Total Value: $2,323,100
  • Market Land Value: $1,683,100
  • Market Improvement Value: $640,000

    Assessments Valuation

  • Assessed Year: 2023
  • Assessed Total Value: $157,158
  • Assessed Land Value: $113,862
  • Assessed Improvements Value: $43,296

    Sales

  • Current Sale Contract Date: Aug 24, 2012
  • Current Sale Recording Date: Aug 29, 2012
  • Current Sale Price:
  • Current Sale Document Type: 71
  • Current Sale Input Document Number: 3247855
  • Previous Sale Recording Date: Feb 26, 2007
  • Previous Sale Contract Date: Feb 14, 2007
  • Previous Sale Amount: $1,119,000
  • Previous Sale Document Type: 71
Data used for valuation calculations is provided by RealtyHop, and other third party sources

Comparables

Unit
Status
Type
Beds
Baths
ft²
Price/ft²
Asking Price
Listed On
Closing Price
Sold On
HOA + Taxes

About Central Boulder


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Frequently Asked Questions

When was property at 721 9th Street built and last sold?
The property at 721 9th Street was built in 1911 and last sold on Aug 24, 2012 for $1,034,000.
How much is this home worth?
The estimated value of the home located at 721 9th Street is $2,753,445.
What are some comparable homes to 721 9th Street?
There are currently no comparable homes to 721 9th Street.