Boulder County property record for 4651 Macarthur Ln, Boulder, CO 80303
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.25 ba · 1,784 sqft · built 1983 |
| Lot Size | 0.021 acres (903 sqft) |
| Owner | Company Name on File |
| Last Sale | $325,000 (Aug 2012) |
| Tax Bill | $3,622 (2025) |
| Deeds & Mortgages | May 2023 Sale |
| Flood Zone | Zone X (moderate risk) |
| APN | 1463-33-2-19-001 |
| Primary APN | 1463-33-2-19-001 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.25 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 6 Rooms |
| Building Area | 1,784 sqft Living Area |
| Gross Area | 1,884 sqft |
| 1st Floor Area | 636 sqft |
| Upper Floors Area | 612 sqft |
| Basement Area | 636 sqft |
| Finished Basement | 536 sqft |
| Unfinished Basement | 100 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1983 |
|---|---|
| Effective Year Built | Effective 1995 |
| Architectural Style | Townhouse |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 903 sqft (0.021 acres) |
| Deck Area | 80 sqft |
| Cooling System | Evaporative |
|---|---|
| Heating Fuel | Electric |
| Account Number | R0077985 |
|---|---|
| Street Address | 4651 MACARTHUR LN |
| City | BOULDER |
| State | CO |
| Zip | 80303-1161 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 20 MACARTHUR PARK REPLAT A SEE SPLIT 103313 |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 33 |
| Legal Subdivision | MACARTHUR PARK REPLAT A - BO |
| Legal Block | 3 |
| Legal Lot Number | 20 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3003 |
| Census Tract | 12603 |
4651 Macarthur Ln is owned by a company that bought it in August 2012.
Source: Boulder County records, as of September 18, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 4651 MACARTHUR LN, BOULDER, CO 80303-1161 |
| Owner Type | Company |
| Vesting | Limited Liability Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Aug 7, 2012 · Amount on File |
| Deed Sale | Aug 7, 2012 · Amount on File |
| Prior Sale | May 10, 2005 · Amount on File |
| Deed Document Number | 20123242836 |
| Prior Transfer Date | Nov 26, 2008 |
| Prior Transfer Doc | 0003112391 |
| Record Updated | Oct 29, 2026 |
| Document Type | Special Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | May 8, 2023 |
| Property Address | 4651 MACARTHUR LN, BOULDER, CO 80303-1161 |
| Document Number | 0004006327 |
| Instrument Date | Apr 11, 2023 |
| Instrument | 4006327 |
| Transaction Type | Transfer |
| Record Updated | May 17, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 34226 GAP RD, GOLDEN, CO 80403-8632 |
| Name | Verified Name |
|---|---|
| Address | 4651 MACARTHUR LN, BOULDER, CO 80303-1161 |
The 2025 property tax bill for 4651 Macarthur Ln was $3,622, up 17.8% from the year before.
Source: Boulder County assessment roll, as of September 18, 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Municipality | Boulder City |
| Unified School District | Boulder Valley School District RE-2 (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $37,197 (-2.08%) Land $8,712 Building $28,485 | $607,800 (-) Land $188,900 Building $418,900 | |
| 2025 | $3,622.00 (+17.75%) | $37,987 Land $11,806 Building $26,181 | $607,800 Land $188,900 Building $418,900 |
| 2024 | $3,076.00 (+1.75%) | ||
| 2023 | $3,023.00 (+5.48%) | $38,693 (+25.33%) Land $14,948 Building $23,745 | $577,500 (+30.01%) Land $223,100 Building $354,400 |
| 2022 | $2,866.00 | $30,872 Land $10,981 Building $19,891 | $444,200 Land $158,000 Building $286,200 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
FEMA maps place 4651 Macarthur Ln in Zone X, an area of moderate flood risk, within 100 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective October 14, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Nearest Special Flood Hazard Area | Zone AO, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 31 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 31 in force |
| Nearby Flood Claims | 7 (2000–2013) |
| Claims Outside the SFHA | 5 of 7 |
| Most Recent Claim | Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides |
| Claims by Event |
|
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
The area around 4651 Macarthur Ln has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | CITY OF BOULDER serves 166,080 people · EPA ID CO0107152 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Sep 2024 |
| Lead | 2 ppb (2023–2025) action level 15 ppb |
| Water Quality | Haloacetic acids resolved · Jul 2017 |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 1 last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 103 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Networks Fixed Wireless | 2,500 / 2,500 |
| Xfinity Cable · Fiber in parts of the area | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| LiveWireNet Fixed Wireless | 250 / 100 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: CenturyLink.
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