Set at the end of a private dead-end drive on Flagstaff Road, this octagon-shaped residence rises through four levels on 10.25 forested acres. The road below is one of the best-known climbs in Colorado cycling, and Green Mountain Trail starts steps from the back door, close enough that a morning run means putting on shoes and going.Downtown Boulder is minutes away, but you would never know it. No neighbors in sight, nothing to hear but wind and birds. Longs Peak and the Indian Peaks Wilderness fill the view west, and at night Boulder's lights spread out far below to the east. 5097 Flagstaff suits someone who has worked hard for this kind of quiet and wants to wake up in the trees without giving up dinner reservations, live music, or a decent grocery run. Some will live here year round. Others will use it as a retreat, for family, for writing, for gathering people somewhere quiet.Each level opens onto something different. The great room has vaulted ceilings, exposed timber beams, and walls of glass that bring the ridge inside. A sunken conversation and dining area sits at the center, the kind of space where dinner runs long. The kitchen was built for real cooking: Viking range, Thermador refrigerator, slate tile backsplash, custom cabinetry. The primary suite opens to a southwest-facing Juliette deck for morning coffee. At the top of the house is the Birdsnest office, ringed in glass with forest and mountain views in every direction. The main level deck wraps several sides of the house, each with a different view.Outdoors, a detached 1,500 sq ft geothermal greenhouse means tomatoes in February and greens all winter. A fully owned solar array powers the property outright. A gas fire pit handles the evenings, horseshoes are set up below the house, and two fenced acres surround it.You can ride Flagstaff before work, hike Green Mountain at lunch, and watch the sun go down behind the Divide from the deck. That is the day this house is built around.
For sale
$2,595,000
5097 Flagstaff Rd, Boulder, CO 80302
4beds
5,070sqft
Single Family Residence
Built in 1989
10.25 Acres Lot
$-- Zestimate®
$512/sqft
$-- HOA
What's special
Octagon-shaped residenceThermador refrigeratorSlate tile backsplashCustom cabinetryViking rangePrivate dead-end driveExposed timber beams
- 169 days
- 542
- 23
Zillow last checked:
Listing updated:
Listed by:
Gretchen Heine 805-722-5800,
milehimodern - Boulder
Source: IRES as distributed by MLS GRID,MLS#: 1053687
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 5
- Full bathrooms: 2
- 3/4 bathrooms: 2
- 1/2 bathrooms: 1
- Main level bathrooms: 3
Primary bedroom
- Description: Wood
- Features: 5 Piece Primary Bath
- Level: Upper
- Area: 1 Square Feet
- Dimensions: 1 x 1
Bedroom 2
- Description: Wood
- Level: Main
Bedroom 3
- Description: Wood
- Level: Main
Bedroom 4
- Description: Wood
- Level: Main
Dining room
- Description: Tile
- Level: Main
Family room
- Description: Carpet
- Level: Basement
Kitchen
- Description: Tile
- Level: Main
- Area: 1 Square Feet
- Dimensions: 1 x 1
Laundry
- Level: Lower
Living room
- Description: Wood
- Level: Main
Recreation room
- Description: Wood
- Level: Basement
Study
- Description: Wood
- Level: Upper
Heating
- Forced Air, Hot Water
Cooling
- Central Air
Appliances
- Included: Gas Range, Double Oven, Refrigerator, Bar Fridge, Microwave
- Laundry: Washer/Dryer Hookup
Features
- Eat-in Kitchen, Cathedral Ceiling(s), Open Floorplan, Pantry, Walk-In Closet(s), Wet Bar, Beamed Ceilings
- Flooring: Wood
- Windows: Window Coverings
- Basement: Crawl Space
- Has fireplace: Yes
- Fireplace features: Gas, Family Room
Interior area
- Total structure area: 3,500
- Total interior livable area: 5,070 sqft
- Finished area above ground: 3,500
Video & virtual tour
Property
Parking
- Total spaces: 3
- Parking features: Attached
- Attached garage spaces: 3
- Details: Attached
Features
- Levels: Five Or More
- Stories: 5
- Patio & porch: Deck
- Exterior features: Balcony
- Spa features: Bath, Heated
- Fencing: Fenced
- Has view: Yes
- View description: Mountain(s), Plains View, Panoramic
Lot
- Size: 10.25 Acres
- Features: Wooded, Native Plants, Sloped, Rock Outcropping, Abuts Public Open Space
Details
- Parcel number: R0104657
- Zoning: F
- Special conditions: Private Owner
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Contemporary
- Property subtype: Single Family Residence
Materials
- Frame, Cedar
- Roof: Composition
Condition
- New construction: No
- Year built: 1989
Utilities & green energy
- Electric: Photovoltaics Seller Owned
- Sewer: Septic Tank
- Water: Well
- Utilities for property: Electricity Available, Propane
Green energy
- Energy efficient items: Southern Exposure
Community & HOA
Community
- Features: Trail(s)
- Subdivision: Walker Ranch Area
HOA
- Has HOA: No
Location
- Region: Boulder
Financial & listing details
- Price per square foot: $512/sqft
- Tax assessed value: $1,526,400
- Annual tax amount: $9,545
- Date on market: 3/12/2026
- Listing terms: Cash,Conventional
- Exclusions: SELLER'S PERSONAL PROPERTY + ALL STAGING ITEMS
- Electric utility on property: Yes
- Road surface type: Gravel
Estimated market value
Not available
Estimated sales range
Not available
Not available
Price history
| Date | Event | Price |
|---|---|---|
| 3/12/2026 | Listed for sale | $2,595,000+226.4%$512/sqft |
Source:  IRES as distributed by MLS GRID #1053687 Report a problem | ||
| 4/11/2001 | Sold | $795,000+759.5%$157/sqft |
Source: Public Record Report a problem | ||
| 2/17/1998 | Sold | $92,500$18/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $10,232 +1.6% | $95,400 -16.5% |
| 2024 | $10,074 +20.9% | $114,309 -1% |
| 2023 | $8,335 +4.8% | $115,417 +35.2% |
| 2022 | $7,950 +23% | $85,339 -2.8% |
| 2021 | $6,462 | $87,795 +28.6% |
| 2020 | $6,462 +27.8% | $68,276 |
| 2019 | $5,057 | $68,276 +27.1% |
| 2018 | $5,057 | $53,705 -9.5% |
| 2017 | $5,057 -10% | $59,373 +0.4% |
| 2016 | $5,617 +6.3% | $59,111 +21.5% |
| 2015 | $5,287 +21.4% | $48,635 |
| 2014 | $4,355 -58.2% | $48,635 |
| 2013 | $10,431 +2.3% | $48,635 -2.2% |
| 2012 | $10,195 -4.5% | $49,750 |
| 2011 | $10,671 +2.6% | -- |
| 2010 | $10,400 +132.9% | $56,160 |
| 2009 | $4,465 +2.6% | $56,160 -19% |
| 2008 | $4,352 -5% | $69,330 |
| 2007 | $4,582 +3.5% | $69,330 -2.7% |
| 2006 | $4,427 +10.9% | $71,280 |
| 2005 | $3,992 +0.5% | $71,280 +4.9% |
| 2004 | $3,972 +18.5% | $67,940 |
| 2003 | $3,351 +10.4% | $67,940 +32.7% |
| 2002 | $3,034 | $51,180 -90.8% |
| 2001 | -- | $559,300 |
Find assessor info on the county website
Monthly payment
Est. payment
Payment breakdown
Explore the cost of this home by adjusting the details. Changes won't be saved.Climate risks
Neighborhood: 80302
Nearby schools
Schools provided by the listing agent
- Elementary: Flatirons
- Middle: Manhattan
- 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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