In the sought-after Wonderland Hills community of North Boulder, this 4,093-square-foot residence has been extensively renovated and pairs a turnkey main home with a permitted, income-producing ADU. Backing to the protected City of Boulder greenbelt, the home enjoys open-space and foothill views, remarkable privacy, and trail access. At its heart is a lovely, light-filled great room, opened up and crowned by a wood-paneled vaulted ceiling, with a wall of glass framing the open space and a gas fireplace set beneath a picture window. The remodeled kitchen is a showpiece in custom copper, and warm Brazilian cherry hardwood runs throughout the main level. The primary suite is a true retreat, its modern Euro-style bath appointed with beautiful accents, an oversized glass shower, double vanities, and a wonderful soaking tub that looks out onto nature. Enjoy the built-in infrared sauna, plus several other beautifully finished baths. The walk-out lower level is a fully remodeled, permitted ADU of roughly 1,260 square feet, with its own kitchen, bedroom, bath, living area, a separate radiant heat system, and a private French-door entrance to a garden patio. Rented in the past, it is an ideal setup for guests, extended family, or income, especially timely with the Sundance Film Festival arriving in Boulder in 2027. A detached garage includes a finished office with its own entrance and a half-bath. The upgrades run deep, including a new roof, full exterior stucco, fire-rated Brazilian hardwood decks with glass railings, a pergola over the main deck, two new driveways, and a beautifully redesigned landscape. All just minutes from Wonderland Lake, the private swim and tennis club, trails, Lucky's Market, and Foothill, Centennial, and Boulder High schools.
For sale
$2,875,000
3945 Promontory Ct, Boulder, CO 80304
4beds
4,093sqft
Mixed Use
Built in 1984
0.3 Acres Lot
$-- Zestimate®
$702/sqft
$60/mo HOA
What's special
Oversized glass showerTwo new drivewaysGas rangeAll-new lightingWood-paneled vaulted ceilingComplete landscape redesignBuilt-in infrared sauna
- 225 days |
- 959 |
- 21 |
Zillow last checked:
Listing updated:
Listed by:
Joel Ripmaster 303-771-3850,
Madison & Company Properties - Boulder
Source: IRES as distributed by MLS GRID,MLS#: 1049021
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 5
- Full bathrooms: 3
- 3/4 bathrooms: 1
- 1/2 bathrooms: 1
- Main level bathrooms: 3
Rooms
- Room types: Loft
Primary bedroom
- Description: Carpet
- Features: 5 Piece Primary Bath
- Level: Main
- Area: 260 Square Feet
- Dimensions: 13 x 20
Bedroom 2
- Description: Carpet
- Level: Main
- Area: 156 Square Feet
- Dimensions: 12 x 13
Bedroom 3
- Description: Carpet
- Level: Main
- Area: 238 Square Feet
- Dimensions: 14 x 17
Bedroom 4
- Description: Carpet
- Level: Lower
- Area: 198 Square Feet
- Dimensions: 11 x 18
Dining room
- Description: Hardwood
- Level: Main
- Area: 117 Square Feet
- Dimensions: 9 x 13
Kitchen
- Description: Hardwood
- Level: Main
- Area: 252 Square Feet
- Dimensions: 12 x 21
Laundry
- Description: Vinyl
- Level: Upper
- Area: 78 Square Feet
- Dimensions: 6 x 13
Living room
- Description: Hardwood
- Level: Main
- Area: 494 Square Feet
- Dimensions: 19 x 26
Recreation room
- Description: Carpet
- Level: Lower
- Area: 400 Square Feet
- Dimensions: 20 x 20
Study
- Description: Carpet
- Level: Upper
- Area: 160 Square Feet
- Dimensions: 10 x 16
Heating
- Forced Air, Baseboard, 2 or more Heat Sources
Cooling
- Central Air, Ceiling Fan(s)
Appliances
- Included: Dishwasher, Refrigerator, Washer, Dryer
Features
- Eat-in Kitchen, Cathedral Ceiling(s), Open Floorplan, Natural Woodwork, Wet Bar
- Flooring: Wood
- Windows: Window Coverings
- Basement: None
- Has fireplace: Yes
- Fireplace features: Free Standing, Living Room
Interior area
- Total structure area: 2,833
- Total interior livable area: 4,093 sqft
- Finished area above ground: 2,833
Video & virtual tour
Property
Parking
- Total spaces: 2
- Parking features: Detached, Oversized
- Garage spaces: 2
- Details: Detached
Accessibility
- Accessibility features: Main Floor Bath, Accessible Bedroom
Features
- Levels: Tri-Level
- Patio & porch: Patio, Deck
- Exterior features: Sprinkler System, Balcony, Tennis Court(s)
- Has private pool: Yes
- Pool features: Private
- Spa features: Heated
- Fencing: Wood
- Has view: Yes
- View description: Hills, Plains View
Lot
- Size: 0.3 Acres
- Features: Cul-De-Sac, Corner Lot, Wooded, Evergreen Trees, Deciduous Trees, Native Plants, Abuts Public Open Space, Meadow, Paved, Curbs, Gutters, Sidewalks, Street Light, Fire Hydrant within 500 Feet
Details
- Parcel number: R0095451
- Zoning: Res
- Special conditions: Private Owner
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Contemporary
- Property subtype: Mixed Use
Materials
- Stucco
- Foundation: Slab
- Roof: Other
Condition
- New construction: No
- Year built: 1984
Utilities & green energy
- Electric: Xcel
- Gas: Xcel
- Sewer: Public Sewer
- Water: City
- Utilities for property: Natural Gas Available, Electricity Available, Cable Available, High Speed Avail
Green energy
- Energy efficient items: Sun Space, Southern Exposure, Windows, Doors, Thermostat
Community & HOA
Community
- Features: Clubhouse, Tennis Court(s), Pool, Playground
- Security: Fire Alarm
- Subdivision: Wonderland Hill 7 & 8
HOA
- Has HOA: Yes
- Services included: Common Amenities, Management
- HOA fee: $725 annually
- HOA name: Wonderland Hill Pool & Tennis
Location
- Region: Boulder
Financial & listing details
- Price per square foot: $702/sqft
- Tax assessed value: $2,393,300
- Annual tax amount: $12,399
- Date on market: 1/6/2026
- Listing terms: Cash,Conventional
- Electric utility on property: Yes
- Road surface type: Concrete
Estimated market value
Not available
Estimated sales range
Not available
Not available
Price history
| Date | Event | Price |
|---|---|---|
| 7/20/2026 | Price change | $2,875,000-4%$702/sqft |
Source:  IRES as distributed by MLS GRID #1049021 Report a problem | ||
| 1/6/2026 | Listed for sale | $2,995,000$732/sqft |
Source: IRES as distributed by MLS GRID #1049021 Report a problem | ||
| 12/31/2025 | Listing removed | $2,995,000$732/sqft |
Source: IRES as distributed by MLS GRID #1033748 Report a problem | ||
| 6/10/2025 | Price change | $2,995,000-4.9%$732/sqft |
Source: IRES as distributed by MLS GRID #1033748 Report a problem | ||
| 5/12/2025 | Listed for sale | $3,150,000+284.1%$770/sqft |
Source: IRES as distributed by MLS GRID #1033748 Report a problem | ||
| 7/11/2021 | Listing removed | -- |
Source: Zillow Rental Manager Report a problem | ||
| 6/9/2021 | Listed for rent | $2,000 |
Source: Zillow Rental Manager Report a problem | ||
| 9/21/2009 | Sold | $820,000-14.6%$200/sqft |
Source: Public Record Report a problem | ||
| 5/6/2009 | Listing removed | $959,900$235/sqft |
Source: Postlets #588518 Report a problem | ||
| 3/15/2009 | Price change | $959,900-3.9%$235/sqft |
Source: Postlets #588518 Report a problem | ||
| 1/24/2009 | Price change | $999,000+3.5%$244/sqft |
Source: Postlets #588518 Report a problem | ||
| 12/4/2008 | Price change | $965,000-1%$236/sqft |
Source: Postlets #588518 Report a problem | ||
| 11/29/2008 | Listed for sale | $975,000$238/sqft |
Source: Postlets #588518 Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $12,399 +1.8% | $149,581 -1.2% |
| 2024 | $12,184 +9.9% | $151,467 -11.8% |
| 2023 | $11,082 +4.9% | $171,655 +35.9% |
| 2022 | $10,568 +16.8% | $126,288 -2.8% |
| 2021 | $9,048 | $129,923 +16.9% |
| 2020 | $9,048 +6.5% | $111,097 |
| 2019 | $8,498 | $111,097 +13.3% |
| 2018 | $8,498 | $98,014 -9.5% |
| 2017 | $8,498 +3.9% | $108,360 +21.5% |
| 2016 | $8,179 +11.8% | $89,215 +19.2% |
| 2015 | $7,313 +16.3% | $74,816 |
| 2014 | $6,291 -4.3% | $74,816 |
| 2013 | $6,575 +0.9% | $74,816 -4.7% |
| 2012 | $6,517 +2.8% | $78,486 |
| 2011 | $6,337 +7.1% | -- |
| 2010 | $5,918 +12.9% | $78,410 -6.9% |
| 2009 | $5,240 +3.5% | $84,220 +2.8% |
| 2008 | $5,061 -0.6% | $81,890 |
| 2007 | $5,093 +3.9% | $81,890 +2.7% |
| 2006 | $4,904 +13.9% | $79,700 |
| 2005 | $4,305 +0.7% | $79,700 +13.1% |
| 2004 | $4,274 -8.8% | $70,450 -4.4% |
| 2003 | $4,686 +10.3% | $73,660 +9.7% |
| 2002 | $4,247 | $67,140 -90.9% |
| 2001 | -- | $733,800 |
Find assessor info on the county website
Monthly payment
Est. payment
Payment breakdown
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Neighborhood: Wonderland Hills
Nearby schools
GreatSchools rating
- 9/10Foothill Elementary SchoolGrades: K-5Distance: 1 mi
- 6/10Centennial Middle SchoolGrades: 6-8Distance: 1.4 mi
- 9/10Boulder High SchoolGrades: 9-12Distance: 2.6 mi
Schools provided by the listing agent
- Elementary: Foothill
- Middle: Centennial
- High: Boulder
Source: IRES as distributed by MLS GRID. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.
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