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1838 23rd St, Boulder, CO 80302 Property Records

Boulder County property record for 1838 23rd St, Boulder, CO 80302

Property Summary

Property TypeApartment House (2-4 Units)
Details24 bd · 12 ba · 9,888 sqft · built 1974
Lot Size0.433 acres (18,880 sqft)
OwnerCompany Name on Record
Last Sale$40,000 (Jun 1984)
Tax Bill$20,634 (2025)
Deeds & MortgagesDec 2017 Sale
Dec 2017 Sale
Flood ZoneZone X (moderate risk)
APN1463-30-4-49-009

Property Details

APN / Parcel Number

Primary APN1463-30-4-49-009
Alternative APNs
  • R0067785
  • 0067785

Interior

Bedrooms24 Beds
Full Baths12 Baths
Total Rooms48 Rooms
Units12 Units
Building Area9,888 sqft Living Area
1st Floor Area2,472 sqft
Upper Floors Area4,944 sqft
Basement Area2,472 sqft
Finished Basement2,472 sqft
Interior WallsWallboard/Drywall

Exterior

Year BuiltBuilt 1974
Effective Year BuiltEffective 1974
Architectural StyleA-Frame
Exterior MaterialWood Shingle
Construction TypeFrame
Lot Area18,880 sqft (0.433 acres)
Deck Area1,346 sqft
Patio Area1,870 sqft

Utilities, Heating & Cooling

Heating SystemHot Water

Location & Zoning

Account NumberR0067785
Street Address1838 23RD ST
CityBOULDER
StateCO
Zip80302-5673
Property CategoryCommercial
Property TypeResidential > Multi-Unit > Apartment House (2-4 Units)
Legal DescriptionLOT 12 & PT LOTS 13 & 14 LESS PT TO RR & PT LOTS 25-27 INC OF BLK B BOULDER EAST BK 664 PG 273 BCR CREEKSIDE
Legal Range70
Legal Township1N
Legal Section30
Legal SubdivisionBOULDER O T EAST & WEST & NORTH - BO
Legal BlockB
Legal Lot Number12
JurisdictionBOULDER CO
Township / Civil DivisionBOULDER
Census Block Group2
Census Block2013
Census Tract12205

Owner

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 RecordCompany Name on Record
Mailing Address2737 MAPLETON AVE, 102, BOULDER, CO 80304-3836
Owner TypeCompany

Deeds, Mortgages & Sale History

DateDocument
Dec 20, 2017Grant Deed, Transfer
Dec 20, 2017Grant Deed, Transfer

Assessor's Deed Record

Deed NamesName on Deed
Last SaleJun 7, 1984 · Amount on Record
Deed SaleJun 7, 1984 · Amount on Record
Prior SaleMar 5, 1975 · Amount on Record
Deed Document Number1984625816
Record UpdatedOct 29, 2026

December 2017: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionBOULDER CO
Recording DateDec 20, 2017
Property Address1838 23RD ST, BOULDER, CO 80302-5673
Document Number0003632162
Instrument DateSep 1, 2017
Instrument3632162
Transaction TypeTransfer
Record UpdatedJan 3, 2018

Transaction

Tax$0.00
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipCompany
Address2737 MAPLETON AVE #102 BOULDER CO 803043836, 102, BOULDER, CO 80304-3836

December 2017: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionBOULDER CO
Recording DateDec 20, 2017
Property Address1838 23RD ST, BOULDER, CO 80302-5673
Document Number0003632167
Instrument DateSep 1, 2017
Instrument3632167
Transaction TypeTransfer
Record UpdatedJan 3, 2018

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipCompany
Address2737 MAPLETON AVE #102 BOULDER CO 803043836, 102, BOULDER, CO 80304-3836

Tax Assessment & Valuation

Source: Boulder County assessment roll, as of September 18, 2026

Property Jurisdictions

TypeName
StateColorado
CountyBoulder County
MunicipalityBoulder City
Unified School DistrictBoulder Valley School District RE-2 (PK - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2026$219,640 (-26.47%) Land $83,450 Building $136,190$3,300,000 (-30.96%) Land $1,297,200 Building $2,002,800
2025$20,634.00 (+4.74%)$298,719 (+37.61%) Land $81,075 Building $217,644$4,779,500 (+47.52%) Land $1,297,200 Building $3,482,300
2024$19,700.00 (+1.92%)
2023$19,328.00 (-7.04%)$217,080 (+1.34%) Land $104,520 Building $112,560$3,240,000 (+2.86%) Land $1,560,000 Building $1,680,000
2022$20,791.00$214,200 Land $54,427 Building $159,773$3,150,000 Land $800,400 Building $2,349,600

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

Source: FEMA National Flood Hazard Layer, effective October 14, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood ZoneZone X
moderate risk
500-Year FloodplainYes
0.2% annual chance
Nearest Special Flood Hazard AreaZone AE, within 100 ft
Flood Insurance RequirementNot required
lenders may require it
Flood Insurance CostPremium on Record
median of 31 individual policies
Community Rating SystemClass 5 (25% premium discount)
Nearby Flood Policies64 units insured
incl. 33 condo units
Nearby Flood Claims6 (2013)
Claims Outside the SFHA2 of 6
Most Recent ClaimSep 2013 · Severe Storms, Flooding, Landslides, And Mudslides
Claims by Event
  • Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 6 claims

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

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire RiskNot rated
no burnable land within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water SystemCITY OF BOULDER
serves 166,080 people · EPA ID CO0107152
Water SourceSurface water
Last State InspectionSep 2024
Lead2 ppb (2023–2025)
action level 15 ppb

Violations Reported to EPA

Water QualityHaloacetic acids
resolved · Jul 2017
Treatment and ProcedureNone
last 10 years
Monitoring and Reporting1
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.

Internet Providers

Source: FCC Broadband Data Collection, based on 663 locations within half a mile, as of December 31, 2025

ProviderMax 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: AT&T.

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