Boulder County property record for 830 20th St, Apt 305, Boulder, CO 80302
| Property Type | Condominium |
|---|---|
| Details | 1 bd · 1 ba · 620 sqft · built 1963 |
| Lot Size | 0.001 acres (24 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $365,000 (May 2023) |
| Tax Bill | $2,230 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-31-4-14-029 |
| Primary APN | 1463-31-4-14-029 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 1 Bed |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 3 Rooms |
| Stories | 1 Story |
| Building Area | 620 sqft Living Area |
| 1st Floor Area | 620 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1963 |
|---|---|
| Effective Year Built | Effective 1963 |
| Architectural Style | Condo/Apartment |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Lot Area | 24 sqft (0.001 acres) |
| Heating System | Hot Water |
|---|
| Account Number | R0083195 |
|---|---|
| Street Address | 830 20TH ST, 305 |
| City | BOULDER |
| State | CO |
| Zip | 80302-7744 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Condominium |
| Legal Description | UNIT 305 SAN MARCO SOUTH CONDOS & 2.67 % UND INT COMMON ELEMENTS |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 31 |
| Legal Subdivision | SAN MARCO SOUTH CONDOS - BO |
| Legal Block | 2 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2013 |
| Census Tract | 12401 |
Source: Boulder County records, as of September 18, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 2560 GRAPE AVE, BOULDER, CO 80304-2834 |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | May 31, 2023 · Amount on Record |
| Deed Sale | May 31, 2023 · Amount on Record |
| Prior Sale | Nov 23, 1987 · Amount on Record |
| Deed Document Number | 20234009070 |
| Prior Transfer Date | Aug 12, 2010 |
| Prior Transfer Doc | 0003124569 |
| 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 | $22,907 (-2.08%) Building $22,907 | $374,300 (-) Building $374,300 | |
| 2025 | $2,230.00 (+19.57%) | $23,394 (-2.58%) Building $23,394 | $374,300 (+4.44%) Building $374,300 |
| 2024 | $1,865.00 (+1.91%) | ||
| 2023 | $1,830.00 (-13.52%) | $24,013 (+9.23%) Building $24,013 | $358,402 (+13.31%) Building $358,402 |
| 2022 | $2,116.00 | $21,983 Building $21,983 | $316,300 Building $316,300 |
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 |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Claims | 1 (2013) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides |
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 80% of the US · lower than 91% of Colorado |
|---|---|
| Wildfire Likelihood | 0.02% annual chance |
| Exposure | None beyond 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 481 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 |
May also be available: Magnolia Road Internet Cooperative.
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