3525 23rd St, Boulder, CO 80304 Property Records

Boulder County property record for 3525 23rd St, Boulder, CO 80304

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,984 sqft · built 1973
Lot Size	0.183 acres (7,958 sqft)
Owner	2 Individual Names on File
Last Sale	$509,000 (May 2012)
Tax Bill	$7,405 (2025)
Deeds & Mortgages	Jul 2017 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`1463-19-1-12-012`

Property Details

APN / Parcel Number

Primary APN	`1463-19-1-12-012`
Alternative APNs	`R0007516` `0007516`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,984 sqft Living Area
Gross Area	2,088 sqft
1st Floor Area	1,044 sqft
Basement Area	1,044 sqft
Finished Basement	940 sqft
Unfinished Basement	104 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1973
Effective Year Built	Effective 1995
Architectural Style	Ranch
Exterior Material	Wood Shingle
Construction Type	Frame
Roof Material	Asphalt
Lot Area	7,958 sqft (0.183 acres)
Garage Type	Detached
Garage Area	380 sqft
Parking Spaces	1 Parking Space
Porch	Porch
Porch Area	96 sqft

Utilities, Heating & Cooling

Cooling System	Evaporative
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0007516
Street Address	3525 23RD ST
City	BOULDER
State	CO
Zip	80304-1907
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 31 PARKSIDE
Legal Range	70
Legal Township	1N
Legal Section	19
Legal Subdivision	PARKSIDE - BO
Legal Block	1
Legal Lot Number	31
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	1
Census Block	1006
Census Tract	12103

Owner

Source: Boulder County records · APN 1463-19-1-12-012

Assessment roll updated June 15, 2026 · Last verified June 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 File
Mailing Address	3525 23RD ST, BOULDER, CO 80304-1907
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	May 25, 2012 · Amount on Record
Deed Sale	May 25, 2012 · Amount on Record
Prior Sale	Feb 23, 2009 · Amount on Record
Deed Document Number	20123225561
Prior Transfer Date	Feb 16, 2001
Prior Transfer Doc	0002121877
Record Updated	Sep 20, 2026

July 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	3525 23RD ST, BOULDER, CO 80304-1907
Document Number	0003605889
Instrument Date	Jul 21, 2017
Transaction Type	Mortgage
Record Updated	Aug 04, 2017
Title Company	FIRST AMERICAN TITLE, FIRST AMERICAN TITLE INSURANCE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3525 23RD ST BOULDER CO 803041907, BOULDER, CO 80304-1907

Mortgage

Document Number	0003605889
Date	Jul 28, 2017
Instrument	3605889

Lender

Name	ELEVATIONS CU
Address	BOULDER, CO 80301

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Jul 27, 2047

Interest

Rate Type	Adjustable Rate
Rate	3.37%

Tax Assessment & Valuation

Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified June 2026

Property Jurisdictions

Type	Name
State	Colorado
County	Boulder County
Municipality	Boulder City
Unified School District	Boulder Valley School District RE-2 (PK - 12)

Tax Bill & Assessment History

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.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$84,497 (+8.8%) Land $38,298 Building $46,199	$1,242,600 (-) Land $563,200 Building $679,400
2025	$7,405.00 (+2.22%)	$77,663 (-11.32%) Land $35,200 Building $42,463	$1,242,600 (-4.93%) Land $563,200 Building $679,400
2023	$7,244.00 (+16.44%)	$87,576 (+30.73%) Land $36,817 Building $50,759	$1,307,100 (+35.61%) Land $549,500 Building $757,600
2022	$6,221.00	$66,991 Land $29,892 Building $37,099	$963,900 Land $430,100 Building $533,800

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of October 14, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
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 18 policies
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	18 in force
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	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 3 claims

Wildfire

Wildfire Risk	Low lower than 80% of the US · lower than 91% of Colorado
Wildfire Likelihood	0.01% annual chance
Exposure	None beyond ember reach

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.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Ayva Fixed Wireless	2,500 / 2,500
Xfinity Cable	2,000 / 250
Live Wire Networks Fixed Wireless	250 / 100
Lumen Technologies DSL · Fiber in parts of the area	140 / 20

May also be available: AT&T, T-Mobile USA, Verizon.

Based on FCC filings for 533 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	CITY OF BOULDER serves 166,080 people
Water Source	Surface water
Last State Inspection	Sep 2024
Lead	2 ppb (2023–2025) action level 15 ppb

Violations Reported to EPA

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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.