Boulder County property record for 2305 Topaz Dr, Boulder, CO 80304
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 2,232 sqft · built 1957 |
| Lot Size | 0.789 acres (34,350 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $11,110 (2025) |
| Deeds & Mortgages | Mar 2023 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 1463-18-4-06-001 |
| Primary APN | 1463-18-4-06-001 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 2,232 sqft Living Area |
| Gross Area | 2,712 sqft |
| 1st Floor Area | 1,602 sqft |
| Upper Floors Area | 630 sqft |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1957 |
|---|---|
| Effective Year Built | Effective 1968 |
| Exterior Material | Brick Veneer |
| Construction Type | Masonry / Concrete Block |
| Lot Area | 34,350 sqft (0.789 acres) |
| Garage Type | Attached |
| Garage Area | 672 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Enclosed Porch |
| Porch Area | 168 sqft |
| Patio Area | 216 sqft |
| Heating System | Forced Air with A/C |
|---|
| Account Number | R0033481 |
|---|---|
| Street Address | 2305 TOPAZ DR |
| City | BOULDER |
| State | CO |
| Zip | 80304-0928 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RR |
| Legal Description | LOT 1 BLK 5 GITHENS ACRES |
| Legal Range | 70 |
| Legal Township | 1N |
| Legal Section | 18 |
| Legal Subdivision | GITHENS ACRES - BOV |
| Legal Block | 5 |
| Legal Lot Number | 1 |
| Jurisdiction | BOULDER CO |
| Township / Civil Division | BOULDER |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 12103 |
2305 Topaz Dr is owned and occupied by an individual who acquired it in March 2023.
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 | Individual Name on File |
|---|---|
| Mailing Address | 2305 TOPAZ DR, BOULDER, CO 80304-0928 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Nov 16, 1982 |
| Deed Sale | Nov 16, 1982 |
| Deed Document Number | 1982520253 |
| Last Transfer Date | Mar 17, 2023 |
| Transfer Doc | 0004001842 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | BOULDER CO |
| Recording Date | Mar 28, 2023 |
| Property Address | 2305 TOPAZ DR, BOULDER, CO 80304-0928 |
| Document Number | 0004001842 |
| Instrument Date | Mar 17, 2023 |
| Instrument | 4001842 |
| Transaction Type | Transfer |
| Record Updated | Apr 5, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 2305 TOPAZ DR, BOULDER, CO 80304-0928 |
The 2025 property tax bill for 2305 Topaz Dr was $11,110.
Source: Boulder County assessment roll, as of September 18, 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Boulder County |
| Unified School District | Boulder Valley School District RE-2 (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $123,073 (+4.75%) Land $99,511 Building $23,562 | $1,879,900 (-) Land $1,533,400 Building $346,500 | |
| 2025 | $11,110.00 | $117,494 Land $95,838 Building $21,656 | $1,879,900 Land $1,533,400 Building $346,500 |
| 2023 | $10,299.00 (+22.72%) | $123,877 (+32.97%) Land $98,450 Building $25,427 | $1,848,900 (+37.93%) Land $1,469,400 Building $379,500 |
| 2022 | $8,392.00 | $93,165 Land $79,411 Building $13,754 | $1,340,500 Land $1,142,600 Building $197,900 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 2305 Topaz Dr in Zone X, an area of minimal flood risk, within 100 ft of a high-risk flood zone.
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 AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 31 policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 31 in force |
| Nearby Flood Claims | 26 (1995–2014) |
| Claims Outside the SFHA | 14 of 26 |
| Most Recent Claim | May 2014 · other causes |
| 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.
Wildfire risk around 2305 Topaz Dr is moderate, ranking above 45% of the US, with a 0.1% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 45% of the US · lower than 71% of Colorado |
|---|---|
| Wildfire Likelihood | 0.1% annual chance |
| Exposure | Indirect 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 384 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 | 2,000 / 250 |
| LiveWireNet Fixed Wireless | 250 / 100 |
| CenturyLink DSL · Fiber in parts of the area | 140 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
5G (outdoors only) and 4G LTE
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