Boulder County property record for 435 Concord Ave, Boulder, CO 80304
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 1,620 sqft · built 1900 |
| Lot Size | 0.127 acres (5,521 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $1,235,000 (Apr 2019) |
| Tax Bill | $11,911 (2025) |
| Deeds & Mortgages | Oct 2022 Mortgage Apr 2019 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 1461-25-1-02-003 |
| Primary APN | 1461-25-1-02-003 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 2 Half Baths |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 1,620 sqft Living Area |
| Gross Area | 2,220 sqft |
| 1st Floor Area | 876 sqft |
| Upper Floors Area | 552 sqft |
| Basement Area | 792 sqft |
| Finished Basement | 192 sqft |
| Unfinished Basement | 600 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1900 |
|---|---|
| Effective Year Built | Effective 1990 |
| Architectural Style | A-Frame |
| Exterior Material | Wood Shingle |
| Construction Type | Frame |
| Roof Material | Asphalt |
| Lot Area | 5,521 sqft (0.127 acres) |
| Porch | Porch |
|---|---|
| Porch Area | 189 sqft |
| Deck Area | 348 sqft |
| Total Buildings | 2 Buildings |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0007499 |
|---|---|
| Street Address | 435 CONCORD AVE |
| City | BOULDER |
| State | CO |
| Zip | 80304-3918 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 6 & W 15 FT OF S 1/3 OF LOT 5 & E 10 FT LOT 7 BLK 11 MAXWELLS ADDITION - AMENDED PLAT OF BLOCKS 10-13 |
| Legal Range | 71 |
| Legal Township | 1N |
| Legal Section | 25 |
| Legal Subdivision | MAXWELLS - BO |
| Legal Block | 11 |
| Legal Lot Number | 5 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 1 |
| Census Block | 1022 |
| Census Tract | 12101 |
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 | 453 HIGHLAND AVE, BOULDER, CO 80302-4717 |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Date | Document |
|---|---|
| Oct 10, 2022 | Deed of Trust, Mortgage · Commercial Mortgage BANK OF COLORADO |
| Apr 2, 2019 | Grant Deed, Transfer HERITAGE TITLE COMPANY, HERITAGE TITLE CO. |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Apr 2, 2019 · Amount on Record |
| Deed Sale | Apr 2, 2019 · Amount on Record |
| Prior Sale | Jun 14, 2006 · Amount on Record |
| Deed Document Number | 20193705271 |
| Prior Transfer Date | May 24, 2010 |
| Prior Transfer Doc | 0003076791 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BOULDER CO |
| Property Address | 435 CONCORD AVE, BOULDER, CO 80304-3918 |
| Transaction Type | Mortgage |
| Record Updated | Oct 17, 2022 |
| Title Company | LAND TITLE GUARANTEE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 453 HIGHLAND AVE, BOULDER, CO 80302-4717 |
| Document Number | 0003984329 |
|---|---|
| Date | Oct 10, 2022 |
| Instrument | 3984329 |
| Name | BANK OF COLORADO |
|---|---|
| Type | Bank |
| Address | BOULDER, CO 80302 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 120 Months |
| Due | Oct 5, 2032 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Apr 2, 2019 |
| Property Address | 435 CONCORD AVE, BOULDER, CO 80304-3918 |
| Document Number | 0003705271 |
| Instrument Date | Apr 1, 2019 |
| Instrument | 3705271 |
| Transaction Type | Transfer |
| Record Updated | Apr 12, 2019 |
| Title Company | HERITAGE TITLE COMPANY, HERITAGE TITLE CO. |
| Amount | Amount Recorded |
|---|---|
| Tax | $123.50 |
| Amount Accuracy | Confirmed |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 435 CONCORD AVE BOULDER CO 803043918, BOULDER, CO 80304-3918 |
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 | $130,234 (+4.96%) Land $94,459 Building $35,775 | $1,985,200 (-) Land $1,459,100 Building $526,100 | |
| 2025 | $11,911.00 (+0.02%) | $124,075 (-10.29%) Land $91,194 Building $32,881 | $1,985,200 (-3.83%) Land $1,459,100 Building $526,100 |
| 2024 | $11,909.00 (+1.79%) | ||
| 2023 | $11,700.00 (+18.05%) | $138,302 (+31.88%) Land $99,281 Building $39,021 | $2,064,200 (+36.8%) Land $1,481,800 Building $582,400 |
| 2022 | $9,911.00 | $104,869 Land $64,135 Building $40,734 | $1,508,900 Land $922,800 Building $586,100 |
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 |
| Flood Insurance Cost | Premium on Record median of 12 individual policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 16 units insured incl. 4 condo units |
| Nearby Flood Claims | 3 (2013) |
| Claims Outside the SFHA | 3 of 3 |
| 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 | High above 77% of the US · above 78% of Colorado |
|---|---|
| Wildfire Likelihood | 0.4% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 684 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 |
| LiveWireNet Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: Verizon.
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