Boulder County property record for 4640 Macarthur Ln, Boulder, CO 80303
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1.75 ba · 1,914 sqft · built 1979 |
| Lot Size | 0.047 acres (2,050 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $295,000 (Aug 2006) |
| Tax Bill | $4,221 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-33-2-12-015 |
| Primary APN | 1463-33-2-12-015 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1.75 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Building Area | 1,914 sqft Living Area |
| Gross Area | 2,858 sqft |
| 1st Floor Area | 944 sqft |
| Upper Floors Area | 970 sqft |
| Basement Area | 944 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1979 |
|---|---|
| Effective Year Built | Effective 1979 |
| Architectural Style | Townhouse |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Lot Area | 2,050 sqft (0.047 acres) |
| Garage Type | Detached |
| Garage Area | 288 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Porch |
|---|---|
| Porch Area | 24 sqft |
| Deck Area | 112 sqft |
| Patio Area | 328 sqft |
| Heating Fuel | Electric |
|---|
| Account Number | R0077980 |
|---|---|
| Street Address | 4640 MACARTHUR LN |
| City | BOULDER |
| State | CO |
| Zip | 80303-1140 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 15 MACARTHUR PARK |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 33 |
| Legal Subdivision | MACARTHUR PARK - BO |
| Legal Block | 3 |
| Legal Lot Number | 15 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3003 |
| Census Tract | 12603 |
Source: Boulder County records, as of September 18, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 4640 MACARTHUR LN, BOULDER, CO 80303-1140 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Aug 17, 2006 · Amount on Record |
| Deed Sale | Aug 17, 2006 · Amount on Record |
| Prior Sale | Mar 17, 1980 · Amount on Record |
| Deed Document Number | 20062798880 |
| Record Updated | Oct 29, 2026 |
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 | $43,404 (-1.95%) Land $14,592 Building $28,812 | $708,300 (-) Land $284,600 Building $423,700 | |
| 2025 | $4,221.00 (+16.67%) | $44,269 (-2.89%) Land $17,788 Building $26,481 | $708,300 (+4.1%) Land $284,600 Building $423,700 |
| 2023 | $3,618.00 (+3.43%) | $45,587 (+21.02%) Land $22,519 Building $23,068 | $680,400 (+25.54%) Land $336,100 Building $344,300 |
| 2022 | $3,498.00 | $37,669 Land $16,548 Building $21,121 | $542,000 Land $238,100 Building $303,900 |
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.
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 minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AO, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record 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.
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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