Perched above Boulder at the end of a private dead-end drive, this extraordinary octagon-shaped residence rises through four levels on 10.25 forested acres. Minutes from downtown Boulder and completely removed from it. No neighbors. No noise. Just wind, birdsong, and a horizon that commands your full attention. Longs Peak & the Indian Peaks Wilderness stretching west, Boulder's city lights scattered far below to the east. Green Mountain Trail begins steps from the back door.This is a property for people who have earned their quiet. Who want to wake up in the trees, step outside into real wilderness, and still be able to reach a world-class restaurant, entertainment & shopping within minutes. It works equally well as a full-time sanctuary or an elevated second home.Inside, each level reveals a new perspective. The main level great room opens with soaring vaulted ceilings, exposed timber beams, and walls of glass that pull the ridge indoors. A sunken conversation and dining area anchors the heart of the space. The chef's kitchen is built for serious cooking, with a Viking range, Thermador refrigerator, slate tile backsplash, and custom cabinetry. The primary suite opens to a southwest-facing Juliette deck, perfect for morning coffee while taking in the views. At the crown of the home sits the Birdsnest office. Wraparound windows frame unobstructed snow-capped peaks in every direction. A wraparound deck off the main level extends the living space deep into the trees.Outside, a detached 1,500 sq ft geothermal greenhouse makes year-round food production possible. A fully owned solar array powers the entire property, true energy independence with zero compromise. A gas fire pit, horseshoe pit, and 2 fenced acres round out a property that lives as well outside as in. For the buyer who wants a home that feels like an escape every single day.
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
Gas fire pitSoaring vaulted ceilingsOctagon-shaped residenceFour levelsHorseshoe pitThermador refrigeratorSlate tile backsplash
- 166 days |
- 533 |
- 21 |
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
GreatSchools rating
- 8/10Flatirons Elementary SchoolGrades: K-5Distance: 2.4 mi
- 9/10Manhattan Middle School Of The Arts And AcademicsGrades: 6-8Distance: 4.5 mi
- 9/10Boulder High SchoolGrades: 9-12Distance: 2.9 mi
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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