Boulder County property record for 1818 Walnut St, Boulder, CO 80302
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.25 ba · 1,711 sqft · built 1901 |
| Lot Size | 0.097 acres (4,232 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $803,590 (Feb 2012) |
| Tax Bill | $8,985 (2025) |
| Flood Zone | Zone X (moderate risk) |
| APN | 1463-30-4-38-003 |
| Primary APN | 1463-30-4-38-003 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.25 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 1,711 sqft Living Area |
| 1st Floor Area | 1,711 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1901 |
|---|---|
| Effective Year Built | Effective 2000 |
| Architectural Style | Ranch |
| Exterior Material | Combination |
| Construction Type | Masonry / Concrete Block |
| Roof Material | Asphalt |
| Lot Area | 4,232 sqft (0.097 acres) |
| Porch | Porch |
| Porch Area | 72 sqft |
| Deck Area | 72 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Account Number | R0003165 |
|---|---|
| Street Address | 1818 WALNUT ST |
| City | BOULDER |
| State | CO |
| Zip | 80302-5511 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 4 LESS W 7 1/2 FT BLK G WIDNERS SOUTH |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 30 |
| Legal Subdivision | WIDNERS SOUTH - BO |
| Legal Block | G |
| Legal Lot Number | 4 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2009 |
| Census Tract | 12205 |
Source: Boulder County records, as of June 15, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on Record |
|---|---|
| Mailing Address | PO BOX 689, GRANTHAM, NH 03753-0689 |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Feb 28, 2012 · Amount on Record |
| Deed Sale | Feb 28, 2012 · Amount on Record |
| Prior Sale | Aug 25, 2009 · Amount on Record |
| Deed Document Number | 20123205333 |
| Last Transfer Date | Jan 21, 2014 |
| Transfer Doc | 0003362998 |
| Record Updated | Sep 20, 2026 |
Source: Boulder County assessment roll, as of June 15, 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 | $102,530 (+8.8%) Land $50,510 Building $52,020 | $1,507,800 (-) Land $742,800 Building $765,000 | |
| 2025 | $8,985.00 (-0.21%) | $94,238 (-12.7%) Land $46,425 Building $47,813 | $1,507,800 (-6.42%) Land $742,800 Building $765,000 |
| 2023 | $9,004.00 (+19.8%) | $107,951 (+33.36%) Land $54,900 Building $53,051 | $1,611,200 (+38.34%) Land $819,400 Building $791,800 |
| 2022 | $7,516.00 | $80,946 Land $41,081 Building $39,865 | $1,164,700 Land $591,100 Building $573,600 |
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 moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 31 individual policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 64 units insured incl. 33 condo units |
| Nearby Flood Claims | 6 (2013) |
| Claims Outside the SFHA | 2 of 6 |
| 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 | Low lower than 98% of the US · lower than 99.2% of Colorado |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | Direct burnable vegetation |
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 432 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Ayva Networks Fixed Wireless | 2,500 / 2,500 |
| CenturyLink Fiber · DSL in parts of the area | 2,000 / 1,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| LiveWireNet Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
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