Price Reduced49
$3,900,000
4 bd · 4 ba · 3,871 sqft
770 6th St, Boulder, CO
John McElveen · on 2 MLSs
Est. $32,037/mo$1,318/sqft · 12 days on Realty
4
Beds
4
Baths
3,791
Sqft
1958
Built
Some homes offer a view. 855 Circle Drive offers an escape - with the Flatirons and foothills as your backdrop. Tucked into a private hillside just below Flagstaff Mountain, 855 Circle Dr sits in a world of its own, sheltered by mature trees, wrapped in stillness, yet moments from the heart of Boulder. The Flatirons rise directly in front of you. Trailheads begin nearby. And the sounds of the city simply don't reach you here. This is the setting that renowned Boulder architect Charles Haertling chose for his own personal residence - and that provenance speaks for itself. The home's clean modern exterior gives way to an interior of remarkable warmth, with tongue-and-groove ceilings, exposed beams, hardwood floors, custom woodwork, and skylights that flood the space with natural light throughout the day. Every window is a frame for the landscape beyond. On the upper level, an open-concept living, dining, and kitchen layout flows toward large sliding glass doors that open onto a south-facing terrace oriented directly at the Flatirons. The primary suite offers Flatiron views, patio access, a five-piece bath, and walk-in closet. A dedicated office and a deck off the kitchen overlooking the city complete the level. The outdoor spaces are exceptional: stone patios, terraced gardens, and meandering mature landscaping including cherry and apple trees that bloom in spring, offer shade in summer, and glow in autumn. The grounds feel like a private nature preserve, designed for quiet mornings & golden-hour evenings. Whether you're entertaining on the terrace, setting out on a trail at dawn, or simply embracing the stillness, the outdoor life here is extraordinary. 855 Circle Drive requires nothing of you except to arrive and settle in. With 3,791 sqft across two well-conceived levels, including a spacious family room, three additional bedrooms, a guest suite, and flexible work-from-home spaces, the home functions beautifully for everyday living and generous hosting alike.
Listing agent
The Zach Zeldner Team
Courtesy of Compass - Boulder
(720) 480-7650
REcolorado · Listing RECIR1069304
Listing agent
The Zach Zeldner Team
Courtesy of brokerage not provided
(720) 480-7650
IRES MLS · Listing IRE1069304
Choose a source to show its complete, unblended listing record.
Showing REcolorado
$999,000
Estimated monthly payment
$32,037/mo
Loan amount $3,996,000. Estimate only — your actual rate and payment depend on credit, location, and lender.
2026 roll
School ratings (A+ to F) from HJN community data.
Flatirons Elementary School
KG-5 · Regular · Boulder Valley School District Re-2
163 students · 13.9:1 student–teacher
September School
6-12 · Regular
74 students · 3.4:1 student–teacher
University Hill Elementary School
PK-5 · Regular · Boulder Valley School District Re-2
405 students · 15.7:1 student–teacher
Boulder High School
9-12 · Regular · Boulder Valley School District Re-2
1,939 students · 21.3:1 student–teacher
Williamsburg Academy of Colorado
6-12 · Regular · EDUCATION REENVISIONED BOCES
622 students · 30.8:1 student–teacher
Mapleton Early Childhood Center
PK-PK · Regular · Boulder Valley School District Re-2
68 students · 19.4:1 student–teacher
New Vista High School
9-12 · Regular · Boulder Valley School District Re-2
327 students · 17.8:1 student–teacher
Sacred Heart of Jesus School
KG-8 · Regular
190 students · 11.5:1 student–teacher
IRES MLS
REcoloradoThis content last refreshed on 2026-10-05 06:28:06 UTC. Some properties which appear for sale on this web site may subsequently have sold or may no longer be available.
Price Reduced49
$3,900,000
4 bd · 4 ba · 3,871 sqft
770 6th St, Boulder, CO
John McElveen · on 2 MLSs
Price Reduced50$3,750,000
4 bd · 5 ba · 3,950 sqft
2237 4th St, Boulder, CO
Trenton Stringari · on 2 MLSs
34$3,995,000
4 bd · 6 ba · 5,531 sqft
6553 Sunshine Canyon Dr, Boulder, CO
Brooke Weathers · on 2 MLSs
Price Reduced35$5,900,000
5 bd · 6 ba · 8,479 sqft
470 & 1344 Weaver Dr, Boulder, CO
The Bernardi Group · on 2 MLSs
37$5,500,000
4 bd · 5 ba · 3,035 sqft
307 Labelle Rd, Boulder, CO
Marybeth Emerson · on 2 MLSs
Price Reduced50$4,345,000
4 bd · 3 ba · 2,652 sqft
505 Pine St, Boulder, CO
Amy LaBorde





Within 2 miles of this home: 40+ restaurants and cafés, 6 grocery stores, 37 parks and green spaces, and 29+ transit stops.
Place data from OpenStreetMap.
Flagstaff House
Flagstaff Road
Alpine Modern Cafe
College Avenue
Chautauqua Dining Hall
Clematis Drive
Chipotle
Mexican restaurant · College Avenue
Prime Nutrition
13th Street
Loving Cup
13th Street
Scrooge Maki
13th Street
Nana’s Dim Sum & Dumplings
Chinese restaurant · 13th Street
University Hill Market & Deli
13th Street
Boulder Farmers Market
13th Street
Whole Foods Market
Alpine Avenue
Sprouts Farmers Market
Arapahoe Avenue
Safeway
Arapahoe Avenue
India Bazaar
28th Street
Edward Sell Smith Park
Centennial Garden
Sleepy Bear Playground
Chautauqua Park
Baseline Road
Waterwise Garden
Beach Park
Euclid Avenue
Eben G. Fine Park
Evert Pierson Kids' Fishing Pond
College Ave & 9th St
9th St & University Ave (Fs)
9th St & University Ave
College Ave & 11th St
Canyon Blvd & 3rd St
Canyon Blvd & Pearl St
9th St & Arapahoe Rd (Ns)
Canyon Blvd & 4th St