340 21st St, Boulder, CO 80302 Property Records

Boulder County property record for 340 21st St, Boulder, CO 80302 · Last verified June 2026

Property Summary

Property Type	Single Family Home
Details	3 bd · 1.75 ba · 2,095 sqft · built 1955
Lot Size	0.196 acres (8,516 sqft)
Owner	2 Individual Names on File
Last Sale	$1,166,400 (Dec 2018)
Tax Bill	$8,951 (2025)
Deeds & Mortgages	Jun 2021 Mortgage Dec 2018 Sale & Mortgage
Flood Zone	Zone X (moderate risk)
APN	`1577-06-1-09-004`

Property Details

APN / Parcel Number

Primary APN	`1577-06-1-09-004`
Alternative APNs	`R0004915` `0004915`

Interior

Bedrooms	3 Beds
Full Baths	1.75 Baths
Half Baths	1 Half Bath
Total Rooms	7 Rooms
Stories	1 Story
Building Area	2,095 sqft Living Area
Gross Area	2,491 sqft
1st Floor Area	2,095 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1955
Effective Year Built	Effective 1980
Architectural Style	Ranch
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	8,516 sqft (0.196 acres)
Garage Type	Attached
Garage Area	396 sqft
Parking Spaces	1 Parking Space
Porch	Porch
Porch Area	244 sqft
Patio Area	250 sqft

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0004915
Street Address	340 21ST ST
City	BOULDER
State	CO
Zip	80302-8013
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	W 133.44 FT OF LOT 5 & 15 FT ALLEY ADJ ON N & W 133.44 FT OF N 10 FT LOT 6 BLK 17 INTERURBAN PARK
Legal Range	70
Legal Township	1S
Legal Section	06
Legal Subdivision	INTERURBAN PARK - BO
Legal Block	17
Legal Lot Number	5
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	1
Census Block	1026
Census Tract	12505

Owner

Source: Boulder County records · APN 1577-06-1-09-004

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	4760 KELLOGG CIR, BOULDER, CO 80303-1109
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Jun 21, 2021	Deed of Trust, Mortgage · Conventional Mortgage WELLS FARGO BANK NA
Dec 07, 2018	Warranty Deed, Transfer ELEVATIONS CU

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Dec 07, 2018 · Amount on Record
Deed Sale	Dec 07, 2018 · Amount on Record
Prior Sale	Jun 05, 2007 · Amount on Record
Deed Document Number	20183689005
Prior Transfer Date	May 30, 2007
Prior Transfer Doc	0002859696
Record Updated	Sep 20, 2026

June 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	340 21ST ST, BOULDER, CO 80302-8013
Transaction Type	Mortgage
Record Updated	Oct 21, 2022
Title Company	STEWART TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003894398
Date	Jun 21, 2021
Instrument	3894398

Lender

Name	WELLS FARGO BANK NA
Type	Bank
Address	SIOUX FALLS, SD 57104

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jul 01, 2051

December 2018: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Dec 07, 2018
Property Address	340 21ST ST, BOULDER, CO 80302-8013
Document Number	0003689005
Instrument Date	Dec 04, 2018
Instrument	3689005
Transaction Type	Transfer
Record Updated	Dec 18, 2018
Title Company	CPR TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$116.64
Amount Accuracy	Confirmed
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	340 21ST ST BOULDER CO 803028013, BOULDER, CO 80302-8013

Mortgage

Document Number	3689006
Date	Dec 07, 2018
Instrument	3689006

Lender

Name	ELEVATIONS CU
Address	BROOMFIELD, CO 80021

Agreement

Amount	Amount Recorded
Term	360 Months
Due	Dec 06, 2048

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		$101,225 (+5.35%) Land $67,755 Building $33,470	$1,488,600 (-3.17%) Land $996,400 Building $492,200
2025	$8,951.00 (+7.65%)	$96,082 (-1.36%) Land $64,313 Building $31,769	$1,537,300 (+5.74%) Land $1,029,000 Building $508,300
2024	$8,315.00 (+1.8%)
2023	$8,168.00 (+6.28%)	$97,405 (+18.86%) Land $65,526 Building $31,879	$1,453,800 (+23.3%) Land $978,000 Building $475,800
2022	$7,685.00	$81,948 Land $53,689 Building $28,259	$1,179,100 Land $772,500 Building $406,600

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Boulder County (08013C), updated October 14, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 080130125051, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X
Special Flood Hazard Area	No
Flood Hazard	Moderate
500-Year Floodplain	Yes
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Cost	Premium on Record median of 15 individual NFIP policies nearby
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	15 in force
Nearby Flood Claims	12 (1994–2013)
Claims Outside the SFHA	4 of 12
Most Recent Claim	Sep 2013, river or lake flooding, Severe Storms, Flooding, Landslides, And Mudslides
Claims By Storm	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 10 claims

Wildfire

Wildfire Risk	Moderate above 65% of the US · above 56% of Colorado
Wildfire Likelihood	About 1 in 441 per year
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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, availability as of December 31, 2025 · Published October 2026 · based on 294 locations within about half a mile of this property

Provider	Technology	Download / Upload (Mbps)
Ayva	Fixed Wireless (unlicensed)	2,500 / 2,500
Lumen Technologies	Fiber	2,000 / 1,000
Xfinity	Cable	2,000 / 250
Verizon	Fixed Wireless	300 / 20
Live Wire Networks	Fixed Wireless (licensed-by-rule)	250 / 100
T-Mobile USA	Fixed Wireless	100 / 20

Availability varies by address; speeds are provider-advertised maximums, not measured.

Mobile Coverage

5G and 4G LTE

Nearby Properties on 21st St

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

By searching, you agree to: Terms • Privacy • Disclosures