Boulder County property record for 850 20th St, Apt 402, Boulder, CO 80302
| Property Type | Condominium |
|---|---|
| Details | 2 bd · 1.75 ba · 930 sqft · built 1967 |
| Lot Size | 0.001 acres (24 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $475,000 (Aug 2021) |
| Tax Bill | $3,386 (2025) |
| Deeds & Mortgages | Aug 2021 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-31-4-13-019 |
| Primary APN | 1463-31-4-13-019 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1.75 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 4 Rooms |
| Stories | 1 Story |
| Building Area | 930 sqft Living Area |
| 1st Floor Area | 930 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1967 |
|---|---|
| Effective Year Built | Effective 1967 |
| Architectural Style | Condo/Apartment |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Lot Area | 24 sqft (0.001 acres) |
| Porch | Porch |
| Porch Area | 156 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Hot Water |
| Account Number | R0083145 |
|---|---|
| Street Address | 850 20TH ST, 402 |
| City | BOULDER |
| State | CO |
| Zip | 80302-7748 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Condominium |
| Legal Description | UNIT 402 SAN MARCO NORTH CONDOS & 2.98% UND INT IN COMMONS ELEMENTS |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 31 |
| Legal Subdivision | SAN MARCO NORTH CONDOS - BO |
| Legal Block | 2 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2013 |
| Census Tract | 12401 |
850 20th St, Apt 402 is owned and occupied by two individuals who bought it in August 2021.
Source: Boulder County records, as of September 18, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 850 20TH ST, 402, BOULDER, CO 80302-7748 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
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 | 2 Names on Deed |
|---|---|
| Last Sale | Aug 2, 2021 · Amount on File |
| Deed Sale | Aug 2, 2021 · Amount on File |
| Prior Sale | Feb 2, 1990 · Amount on File |
| Deed Document Number | 20213903727 |
| Record Updated | Oct 29, 2026 |
| Document Type | Special Warranty Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Aug 2, 2021 |
| Property Address | 850 20TH ST APT 402, 402, BOULDER, CO 80302-7748 |
| Document Number | 0003903727 |
| Map Reference | DOC 341415 |
| Instrument Date | Jul 30, 2021 |
| Instrument | 3903727 |
| Transaction Type | Transfer |
| Record Updated | Aug 11, 2021 |
| Title Company | 8Z TITLE |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $47.50 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 850 20TH ST APT 202, 202, BOULDER, CO 80302-7747 |
| Document Number | 0003903728 |
|---|---|
| Date | Aug 2, 2021 |
| Instrument | 3903728 |
| Name | QUICKEN LOANS LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 180 Months |
| Due | Aug 1, 2036 |
The 2025 property tax bill for 850 20th St, Apt 402 was $3,386.
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 | $33,954 (-2.08%) Building $33,954 | $554,800 (-) Building $554,800 | |
| 2025 | $3,386.00 | $34,675 Building $34,675 | $554,800 Building $554,800 |
| 2023 | $2,905.00 (-9.42%) | $36,464 (+8.09%) Building $36,464 | $544,233 (+12.12%) Building $544,233 |
| 2022 | $3,207.00 | $33,735 Building $33,735 | $485,400 Building $485,400 |
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 850 20th St, Apt 402 in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2013.
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.
Wildfire risk around 850 20th St, Apt 402 is low, with a 0.02% annual chance of wildfire.
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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