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$8,300,000 New to Website

  • For Sale
  • Active
  • Single Family
  • 4 Beds
  • 1 Full Bath
  • 4 Partial Baths
  • 4,410 Sq. Ft.
  • 2 Car Garage
  • Updated 1 day ago
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A true architectural tour de force, this newly completed Mountain Ridge estate redefines modern luxury against one of Boulder's most breathtaking natural backdrops. Designed by award-winning Studio B, with interiors by Studio Brother John and landscaping by Evoke, this striking residence rests on a premier, private three-acre lot bordered by over 6,300 acres of protected open space in the gated Mountain Ridge community. Floor-to-ceiling architectural-grade windows frame unobstructed vistas stretching from the Flatirons to Pikes Peak, the Denver skyline and the eastern plains, immersing every space in light, sky and landscape. The expansive layout offers en-suite baths throughout, an inspiring office or lounge and a flexible lower level ideal for fitness, media or recreation. Interiors showcase globally sourced finishes, including European white oak floors from France, sculptural Cocoon fixtures from Holland, custom white oak cabinetry by BKI Millwork and a chef's kitchen appointed with Gaggenau and Miele appliances. Outdoor living is equally extraordinary, featuring a dining deck, stainless steel hot tub and sunken conversation pit perfectly positioned for sunrise and sunset views. Sustainable, intelligent and impeccably crafted by Morningstar Homes, this residence is more than a home - it is a refined expression of design, privacy and Boulder's unmatched natural beauty.

Full Property Details for 9631 Mountain Ridge Pl

General

  • Price: $8,300,000
  • HOA FEE: $261/month
  • HOA FEE FREQ.: Quarterly
  • Taxes: $3,442 (2025)
  • Status: Active
  • Type: Single Family
  • Source: IRES
  • MLS ID: 1051864
  • Updated: 2/18/2026
  • Added to Site: 2 day(s) ago

Interior

  • Interior Features: Eat-In Kitchen, Separate Dining Room, Cathedral Ceiling(s), Open Floorplan, Pantry, Walk-In Closet(s), Washer/Dryer Hookup, Skylights, Kitchen Island, High Ceilings
  • Fireplace: Yes
  • Fireplace(s): Free Standing, Living Room
  • Appliances: Electric Range, Dishwasher, Refrigerator, Bar Fridge, Washer, Dryer, Fire Alarm
  • Flooring: Wood

Rooms

Bathrooms

  • Total Bathrooms: 5
  • Full Bathrooms: 1
  • 3/4 Bathrooms: 3
  • Half Bathrooms: 1
  • Main Floor Baths: 1

Bedrooms

  • Total Bedrooms: 4

Exterior

  • Exterior Features: Hot Tub
  • Porch/Patio/Deck: Patio, Deck

Parking

  • Garage: Yes
  • Attached garage: Yes
  • Garage Spaces: 2
  • Parking Features: Garage Door Opener, Attached
  • Garage Description: Attached

Location

  • Area: Boulder
  • County: Boulder
  • Subdivision: Mountain Ridge

School Information

  • School District: ST Vrain Dist RE 1J
  • Elementary School: Blue Mountain
  • Middle School: Altona
  • High School: Silver Creek

Community

  • Association: Yes

Heating & Cooling

  • Cooling Type: Central Air
  • Heating Type: Radiant

Utilities

  • Gas: Yes
  • Sewer: Septic Tank
  • Water: District
  • Utility Description: Natural Gas Available, Electricity Available

Structural Information

  • Architectural Style: Contemporary
  • Construction: Frame, Wood Siding, Painted/Stained
  • Exterior Const.: Frame, Wood Siding, Painted/Stained
  • Basement: Yes
  • Basement Desc.: Partial, Partially Finished
  • Roof: Metal
  • Windows: Skylight(s)
  • Square Feet: 4,410
  • Sq. Ft. Source: Plans
  • Living Area: 4,410 Sq. Ft.
  • Year Built: 2025

Lot Features

  • Property View: Mountain(s), Hills, City
  • Mountain views: Yes
  • Lot Size (Acres): 3.1
  • Lot Size (Sq. Ft.): 135,036
  • Frontage: City Street
  • Street/Road Desc.: Asphalt
  • Lot Features: Sloping Lot, Abuts Public Open Space, House Faces East, Xeriscape, Paved
  • Potential Use: Single-Family
  • Zoning: A

Green Features

  • Energy Efficient: Windows, Photovoltaic Owned

Financial Considerations

  • Association Fee: Yes
  • Association Fee: $784
  • Assoc Fee Freq.: Quarterly
  • Tax Amount: $3,442
  • Tax Year: 2025
  • Terms: Cash, Conventional

Disclosures and Reports

  • Special Conditions: Licensed Owner
  • Exclusions: Seller's personal property + all staging items
  • Property ID: R0109299

Listed by milehimodern - Boulder (303) 876-1073

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Listing agent

— 9631 Mountain Ridge Pl —

  • milehimodern - Boulder

    303-876-1073

7203176658

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 9631 Mountain Ridge Pl

School District:St. Vrain Valley School District Re 1j
NameGradesDistance
Blue Mountain Elementary School
1260 Mountain Drive, Longmont, CO 80503
PK-56.2 mi
Altona Middle School
4600 Clover Basin Drive, Longmont, CO 80503
6-86.8 mi
Silver Creek High School
4901 Nelson Road, Longmont, CO 80503
9-126.5 mi
Disclaimer: School attendance boundaries provided by Pitney Bowes and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 9631 Mountain Ridge Pl Get Price Alerts and Save Property

Date
Details
Price
Change
Source
2/18/2026
Listed
$8,300,000
1744.44%
MLS
10/30/2023
Sold
$450,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 9631 Mountain Ridge Pl

Year
Property Taxes
Change
Tax Assessment
Change
2025
$3,442
32%
$30,518
20%
2024
$2,613
1%
$25,334
-13%
2023
$2,580
4%
$29,019
25%
2022
$2,481
2%
$23,283
-3%
2021
$2,431
—
$23,953
-83%
2021
$2,431
-85%
$138,761
-18%
2019
$16,630
44%
$168,862
43%
2018
$11,554
1%
$118,087
—
2017
$11,402
-18%
$118,087
-17%
2016
$13,967
5%
$141,934
—
2015
$13,329
25%
$141,934
26%
2014
$10,664
1%
$112,315
—
2013
$10,588
—
$112,315
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

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Listed by milehimodern - Boulder (303) 876-1073

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9631 Mountain Ridge Pl, Boulder, CO 80302 (MLS# 1051864) is a Single Family property with 4 bedrooms, 1 full bathroom and 4 partial bathrooms. 9631 Mountain Ridge Pl is currently listed for $8,300,000 and was received on February 18, 2026. Want to learn more about 9631 Mountain Ridge Pl? Do you have questions about finding other Single Family real estate for sale in Boulder? You can browse all Boulder real estate or contact a Coldwell Banker agent to request more information.

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