An understated expression of Louisville living, this corner-lot residence merges a coveted Sundance setting with an easy sense of light, space and connection. Recently refreshed kitchen, baths, and with new flooring throughout, the home feels bright, relaxed and immediately welcoming. A south-facing orientation fills the interiors with natural light, while the thoughtful floor plan creates a sense of spaciousness. The main level flows easily between living and dining spaces, with a flexible area that adapts beautifully to the rhythms of everyday life. Upstairs, two bedrooms and baths offer privacy, while the finished lower level introduces another dimension of versatility with space for a home office, additional living area or guest retreat, complete with a deep soaking tub. Outside, mature landscaping lends shade and privacy to a backyard designed for lingering, with a generous brick patio providing a natural setting for morning coffee, summer dinners and evenings under the stars. Queen Anne Victorian-inspired architectural details add distinctive character to the home's exterior, while its larger-than-typical corner lot gives it an especially rare presence within the neighborhood. Across the street a neighborhood connector trail provides quick access to Warembourg Open Space, and pop down Pine Street to be in downtown Louisville in minutes. Ask your agent to share the supplements with you for further info on this gem of a property and area.
Single-familyProperty Type
1985Year Built
6,028 sq ftLot Size
$459Price/Sq.Ft.
2 car garageParking
Listed by Colin Dart• milehimodern - Boulder
Contact: 3038109974
Bought with Kristen Brown Martin• RE/MAX of Boulder, Inc
Est. $2,681 per month, based on comparable rentals
Sale and tax history for 521 W Sycamore Cir
Sale History
Tax History
Date
Event
Price
IRES as Distributed by MLS Grid #1068304
Oct 13, 2026
Sold
$727,813
$459/sq ft
Sep 17, 2026
Contingent
—
Sep 10, 2026
Listed
$725,000
$458/sq ft
Sep 9, 2026
Coming Soon
$725,000
$458/sq ft
IRES as Distributed by MLS Grid #344149
Oct 15, 2002
Sold
$236,000
$149/sq ft
Jun 28, 2002
Listed
$239,900
$151/sq ft
+3
Public Records
Mar 31, 1992
Sold
$99,500
$63/sq ft
Public Records
Dec 4, 1989
Sold
$87,000
$55/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$3,447 (+15.2%)
$23,025 + $18,656
$41,681
2024
$2,992 (+1.7%)
$23,025 + $18,656
$41,681
2023
$2,942 (+22.0%)
$21,286 + $18,706
$39,992
2022
$2,412 (−6.6%)
$24,971 + $18,706
$43,677
2021
$2,583 (+14.2%)
$18,730 + $13,281
$32,011
2020
$2,261 (+1.4%)
$20,499 + $14,536
$35,035
2019
$2,229 (−12.4%)
$17,232 + $14,078
$31,310
2018
$2,543 (+2.0%)
$17,232 + $14,078
$31,310
2017
$2,493 (+14.4%)
$8,640 + $19,829
$28,469
2016
$2,179 (+5.5%)
$8,640 + $19,829
$28,469
2015
$2,065 (+8.0%)
$13,054 + $11,717
$24,771
2014
$1,912 (+2.2%)
$11,940 + $9,950
$21,890
2013
$1,872 (−1.8%)
$11,940 + $9,950
$21,890
2012
$1,905 (+0.9%)
$11,940 + $9,950
$21,890
2011
$1,889 (+0.4%)
$9,393 + $12,975
$22,368
2010
$1,882 (+6.2%)
$9,393 + $12,975
$22,368
2009
$1,773
$10,750 + $11,820
$22,570
Public record
Public record
Zoning
Beds
3
Baths
1
Stories
—
Lot width
—
Lot depth
—
Lot size
6,028 Sq. Ft.
Year renovated
1985
Sq. Ft.
1,080
Year built
1985
Style
Single Family Residential
County
Boulder County
APN
R0097866
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Sep 2, 2026.
RE
Residential Estate District
The residential estate R-E district is intended to provide an alternative to typical urban density single-family residential areas by providing for larger minimum lot areas.
Permitted uses
Include but are not limited to:
Day care facility
Housing-Single unit
Property details
Parking
Parking Information
Garage Type: Attached
Garage Sq. Ft.: 360
Parking Features: Attached
Garage Spaces: 2
Interior
Bedroom Information
# of Bedrooms: 3
All Bedrooms Conform: 1
Bathroom Information
# of Full Baths (Total): 1
# of Three Quarter Baths (Total): 2
# of Full Baths (Upper): 1
# of Three Quarters Baths (Upper): 1
# of Three Quarters Baths (Basement): 1
Study Information
Has Study: 0
Family Room Information
Has Family Room: 0
Basement Information
Basement Features: Full
Fireplace Information
Fireplace Features: Living Room
Heating & Cooling
Heating Information: Forced Air
Interior Features
Interior Features: Eat-in Kitchen, Separate Dining Room, Pantry
Window Features: Window Coverings
Appliances: Electric Range, Dishwasher, Refrigerator, Microwave
Exterior
Building Information
Construction Materials: Frame, Wood Siding
Roof: Composition
Exterior Features
Patio And Porch Features: Patio
Exterior Features: Sprinkler System
Fencing: Partial
Property Information
Levels: Two
Has Improvements: No
Sq. Ft. Upper: 540
Sq. Ft. Main Floor: 540
New Construction Status: Not New, Previously Owned
Property Type: Residential
Property Sub Type: Single Family Residence
Above Grade Finished Area: 1,080
Zoning: RES
Lot Information
Flood Plain: Minimal Flood or C Rating
Lot Features: Corner Lot, House Faces South, Paved
Road Surface Type: Asphalt
Road Frontage Type: City Street
Financial
Tax Information
Tax Annual Amount: $3,447
Tax Year: 2025
Utilities
Utility Information
Water Source: Public
Has Water Rights: No
Is Water Meter Installed: Yes
Sewer: Public Sewer
Utilities: Natural Gas Available, Electricity Available
Gas: Xcel
Location
School Information
Elementary School: Fireside
Middle Or Junior High School: Monarch
High School: Monarch
High School District: Boulder Valley Dist RE2
Public facts
Beds: 3
Baths: 1.0
Sq. Ft.: 1,080
Stories: —
Lot Size: 6,028 square feet
Style: Single Family Residential
Year Built: 1985
Year Renovated: 1985
County: Boulder County
APN: R0097866
Home facts updated by county records on Sep 2, 2026
Around this home
Schools
Fireside Elementary School
Public PreK-5 • Assigned • 0.6mi
10/10
Monarch K-8 School
Public PreK-8 • Assigned • 1.5mi
6/10
Monarch High School
Public 9-12 • Assigned • 1.5mi
8/10
Provided by GreatSchools
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
4/10 Fire Factor
3% chance of being in a wildfire in next 30 years
3/10 Heat Factor
7 days above 91° expected this year, 17 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
3/10 Air Factor
3 unhealthy days expected this year, 4 days in 30 years
Provided by First Street
Historical weather
Louisville, CO • 80027
Average low and high temperatures (°F)
44
22
52
27
64
39
64
39
70
46
83
56
90
63
86
60
78
53
69
44
56
33
54
32
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
78/ 100
Good sunlight
Sunscore
There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
8.8 hrs
5.1 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$656,000 – $794,000
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