Tucked away on over 5 peaceful acres just one mile from downtown Lyons, this custom-built contemporary retreat offers refined design, energy-efficient performance, and seamless indoor-outdoor living. With over 2,100 sq ft of meticulously crafted living space plus a 500+ sq ft detached bonus building, the home was designed in collaboration with the architect to reflect and integrate with its natural surroundings. The signature "butterfly" roof mirrors the gentle slope of the nearby foothills, while expansive Pella fiberglass windows (new as of March 2025) capture natural light and sweeping views of Boulder County Open Space, which borders the property for added privacy and trail access. Built with 2x6 closed-cell foam insulated walls (R-32), in-floor radiant heat set in a 2" gypcrete slab, and ERV systems on both levels, this home exceeds current energy codes while providing year-round comfort. Interior finishes include custom cabinetry, solid 1 3/4" mahogany doors, a mahogany feature wall in the living room, white oak stairs and flooring upstairs, and new wool carpet in all bedrooms. Metalwork throughout was crafted by a local artisan, including stair rails and windowsills. The home is Boulder County Wildland Partners certified for wildfire mitigation and features a 2,500-gallon cistern and non-combustible exterior materials. Charming downtown Lyons is just a few minutes away. Enjoy unique restaurants, shops and spectacular municipal parks and recreational opportunities. A rare offering that combines architectural elegance, environmental harmony, and close-to-town convenience.
Single-familyProperty Type
2011Year Built
5.17 acresLot Size
$683Est. Price/Sq.Ft.
2 car garageParking
Listed by Laura Levy• Coldwell Banker Realty-Boulder
Close-in 5.24 acres in Lyons, adjacent to Heil Open Space! Nestled in a quiet and peaceful mountain valley, yet only minutes to town, schools, parks & rivers. The property has direct access to Heil's Picture Rock trail and great hiking, biking or riding over beautiful terrain all the way to Left Hand Canyon road. Great producing well. Site Plan approved by Boulder County. Easy build on flat lot.
IRES as Distributed by MLS Grid #589875
Aug 9, 2010
Listing Removed
—
Feb 3, 2009
Listed
$199,000
$94/sq ft
IRES as Distributed by MLS Grid #509537
Jan 17, 2008
Sold
$185,000
$87/sq ft
Sep 28, 2006
Listed
$205,000
$97/sq ft
Public Records
Mar 31, 2004
Sold
$200,000
$94/sq ft
Public Records
Mar 18, 2003
Sold
$85,000
$40/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$7,935 (−5.7%)
$23,469 + $49,744
$73,213
2024
$8,417 (+1.6%)
$23,469 + $49,744
$73,213
2023
$8,286 (+33.7%)
$17,708 + $64,186
$81,894
2022
$6,195 (+0.8%)
$21,393 + $64,186
$85,579
2021
$6,145 (+19.6%)
$21,663 + $37,704
$59,367
2020
$5,138 (+1.5%)
$22,287 + $38,789
$61,076
2019
$5,060 (+15.7%)
$6,507 + $44,494
$51,001
2018
$4,375 (+1.6%)
$6,507 + $44,494
$51,001
2017
$4,304 (+13.7%)
$6,408 + $37,793
$44,201
2016
$3,785 (+6.1%)
$6,408 + $37,793
$44,201
2015
$3,567 (+19.7%)
$8,676 + $29,452
$38,128
2014
$2,979 (+9.7%)
$4,696 + $26,523
$31,219
2013
$2,715 (+7.8%)
$4,696 + $26,523
$31,219
2012
$2,518 (−21.7%)
$4,696 + $26,523
$31,219
2011
$3,215 (−25.1%)
$11,048 + $18,228
$29,276
2010
$4,292 (+4.6%)
$40,252
2009
$4,101
$53,650
Tax history for 451 Red Gulch Rd
Year
Property tax
Land + Additions
Assessment*
2025
$7,935 (−5.7%)
$23,469 + $49,744
$73,213
2024
$8,417 (+1.6%)
$23,469 + $49,744
$73,213
2023
$8,286 (+33.7%)
$17,708 + $64,186
$81,894
2022
$6,195 (+0.8%)
$21,393 + $64,186
$85,579
2021
$6,145 (+19.6%)
$21,663 + $37,704
$59,367
2020
$5,138 (+1.5%)
$22,287 + $38,789
$61,076
2019
$5,060 (+15.7%)
$6,507 + $44,494
$51,001
2018
$4,375 (+1.6%)
$6,507 + $44,494
$51,001
2017
$4,304 (+13.7%)
$6,408 + $37,793
$44,201
2016
$3,785 (+6.1%)
$6,408 + $37,793
$44,201
2015
$3,567 (+19.7%)
$8,676 + $29,452
$38,128
2014
$2,979 (+9.7%)
$4,696 + $26,523
$31,219
2013
$2,715 (+7.8%)
$4,696 + $26,523
$31,219
2012
$2,518 (−21.7%)
$4,696 + $26,523
$31,219
2011
$3,215 (−25.1%)
$11,048 + $18,228
$29,276
2010
$4,292 (+4.6%)
$40,252
2009
$4,101
$53,650
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Public record
Public record
Zoning
Beds
3
Baths
2.5
Stories
—
Lot width
—
Lot depth
—
Lot size
5.17 Acres
Year renovated
2011
Sq. Ft.
2,124
Year built
2011
Style
Single Family Residential
County
Boulder County
APN
R0056331
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Sep 2, 2026.
A
Agricultural District
Rural areas where conservation of agricultural resources is of major value, and where residential development compatible with agricultural uses is allowed.
Permitted uses
Include but are not limited to:
Agriculture
Equestrian facility
Livestock production
Religious facility
Day care facility
Housing-Group
Housing-Single unit
Bed & breakfast
Educational/school
Kennel
Property details
Parking
Parking Information
Garage Type: Attached
Garage Sq. Ft.: 500
Parking Features: RV Access/Parking, Attached
Garage Spaces: 2
Interior
Virtual Tour
Bedroom Information
# of Bedrooms: 3
All Bedrooms Conform: 1
Bathroom Information
# of Three Quarter Baths (Total): 2
# of Half Baths (Total): 1
# of Half Baths (Main): 1
# of Three Quarters Baths (Upper): 2
Study Information
Has Study: 0
Family Room Information
Has Family Room: 0
Basement Information
Basement Features: Crawl Space
Heating & Cooling
Heating Information: Radiant
Cooling Information: Evaporative Cooling
Interior Features
Interior Features: Eat-in Kitchen, Open Floorplan, Kitchen Island
Appliances: Gas Range, Dishwasher, Refrigerator, Washer, Dryer, Water Purifier Owned, Disposal
Exterior
Building Information
Construction Materials: Concrete
Roof: Rubber
Exterior Features
Patio And Porch Features: Patio
Fencing: Electric
Property Information
Levels: Two
Has Improvements: No
Sq. Ft. Upper: 1110
Sq. Ft. Main Floor: 1008
New Construction Status: Not New, Previously Owned
Property Type: Residential
Property Sub Type: Single Family Residence
Above Grade Finished Area: 2,118
Zoning: A
Land Information
Possible Use: Single Family
Lot Information
Flood Plain: Minimal Flood or C Rating
Lot Features: Wooded, Evergreen Trees, Deciduous Trees, Native Grass
Road Surface Type: Dirt
Road Frontage Type: County Maintained
Financial
Tax Information
Tax Annual Amount: $8,417
Tax Year: 2024
Utilities
Utility Information
Water Source: Well
Has Water Rights: No
Is Water Meter Installed: Yes
Sewer: Septic Tank
Utilities: Electricity Available, Propane
Gas: propane
Location
School Information
Elementary School: Lyons
Middle Or Junior High School: Lyons
High School: Lyons
High School District: ST Vrain Dist RE 1J
Location Information
Directions: Take 5th Ave/Hwy 7 to Old South St Vrain Rd. Head south on Old South St Vrain Rd. turning left onto Red Gulch Rd. Keep left when Red Gulch meets Jasper Rd. House will be 2nd house on your left.
Public facts
Beds: 3
Baths: 2.5
Sq. Ft.: 2,124
Stories: —
Lot Size: 5.17 acres
Style: Single Family Residential
Year Built: 2011
Year Renovated: 2011
County: Boulder County
APN: R0056331
Home facts updated by county records on Sep 2, 2026
Other
Green Information
Green Energy Efficient: Windows
Around this home
Schools
Lyons Elementary School
Public PreK-5 • Assigned • 1.5mi
7/10
Lyons Middle/Senior High School
Public 6-12 • Assigned • 0.7mi
9/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
10/10 Flood Factor
Estimated 80%+ chance of a flood reaching the building in the next 30 years
7/10 Fire Factor
15% chance of being in a wildfire in next 30 years
3/10 Heat Factor
8 days above 90° expected this year, 21 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
2/10 Air Factor
1 unhealthy days expected this year, 3 days in 30 years
Provided by First Street
Historical weather
Lyons, CO • 80540
Average low and high temperatures (°F)
41
19
49
26
61
37
61
38
67
45
80
55
87
61
83
58
75
51
66
42
52
31
51
30
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 10.4 hours in
June and 6 hours in December, placing it above the
U.S. average for solar exposure.
10.4 hrs
6 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$1.37M – $1.66M
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