837 20th St, Boulder, CO 80302 Property Records

Boulder County property record for 837 20th St, Boulder, CO 80302

Property Summary

Property Type	Exempt (Full or Partial)
Details	26 bd · 13 ba · 12,570 sqft · built 1954
Lot Size	0.232 acres (10,099 sqft)
Owner	Company Name on Record
Last Sale	$940,000 (May 1995)
Deeds & Mortgages	Apr 2021 Line of Credit Dec 2018 Loan Modification
Flood Zone	Zone X (minimal risk)
APN	`1463-31-4-07-015`

Property Details

APN / Parcel Number

Primary APN	`1463-31-4-07-015`
Alternative APNs	`R0006520` `0006520`

Interior

Bedrooms	26 Beds
Full Baths	13 Baths
Total Rooms	50 Rooms
Units	13 Units
Stories	2 Stories
Building Area	12,570 sqft Gross Area
1st Floor Area	4,190 sqft
Upper Floors Area	4,189 sqft
Basement Area	4,190 sqft
Finished Basement	4,190 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1954
Effective Year Built	Effective 1959
Exterior Material	Combination
Construction Type	Frame
Roof Material	Built-Up Asphalt
Lot Area	10,099 sqft (0.232 acres)
Patio Area	65 sqft

Utilities, Heating & Cooling

Heating System	Floor/Wall Furnace

Location & Zoning

Account Number	R0006520
Street Address	837 20TH ST
City	BOULDER
State	CO
Zip	80302-7756
Property Category	Other
Property Type	Other > Exempt (Full or Partial)
Legal Description	LOT 29-32 BLK 17 UNIVERSITY PLACE
Legal Range	70
Legal Township	1N
Legal Section	31
Legal Subdivision	UNIVERSITY PLACE - BO
Legal Block	17
Legal Lot Number	29
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	2
Census Block	2012
Census Tract	12401

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 Record	Company Name on Record
Mailing Address	4800 BROADWAY ST, BOULDER, CO 80304-0524
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Date	Document
Apr 14, 2021	Deed of Trust, Mortgage · Line of Credit FIRSTBANK
Dec 19, 2018	Loan Modification, Mortgage · Line of Credit FIRST NAT'L BK/OMAHA

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	May 8, 1995 · Amount on Record
Deed Sale	May 8, 1995 · Amount on Record
Prior Sale	Jan 9, 1991 · Amount on Record
Deed Document Number	19951515372
Last Transfer Date	Jul 13, 2012
Transfer Doc	0003244745
Record Updated	Oct 29, 2026

April 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	837 20TH ST, BOULDER, CO 80302-7756
Transaction Type	Mortgage
Record Updated	Apr 15, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003876718
Date	Apr 14, 2021
Instrument	3876718

Lender

Name	FIRSTBANK
Type	Bank
Address	DENVER, CO 80215

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	120 Months
Due	Apr 1, 2031

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

December 2018: Loan Modification, Mortgage

Document Type	Loan Modification
Jurisdiction	BOULDER CO
Recording Date	Dec 19, 2018
Property Address	837 20TH ST, BOULDER, CO 80302-7756
Instrument Date	Dec 17, 2018
Instrument	3690793
Transaction Type	Mortgage
Record Updated	Jan 3, 2019

Transaction

Tax	$0.00
Additional	Multiple Parcels

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	4800 BROADWAY ST BOULDER CO 803040524, BOULDER, CO 80304-0524
Investor	Possibly a Property Investor

Mortgage

Document Number	0003690793
Date	Dec 19, 2018
Instrument	3690793

Lender

Name	FIRST NAT'L BK/OMAHA
Type	Bank
Address	205 W OAK ST, FORT COLLINS, CO 80521-2712

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

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

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$260,651 (+8.8%) Land $69,306 Building $191,345	$3,833,100 (-) Land $1,019,200 Building $2,813,900
2025	Additional exemption filed	$239,569 (-8.99%) Land $63,700 Building $175,869	$3,833,100 (-2.44%) Land $1,019,200 Building $2,813,900
2023	Additional exemption filed	$263,230 Land $76,668 Building $186,562	$3,928,800 Land $1,144,300 Building $2,784,500

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.

Flood

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
Nearby Flood Claims	1 (2013)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Sep 2013 · Severe Storms, Flooding, Landslides, And Mudslides

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 Risk	Low lower than 80% of the US · lower than 91% of Colorado
Wildfire Likelihood	0.02% annual chance
Exposure	None beyond 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 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

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, 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 481 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
Verizon Fixed Wireless	300 / 20
LiveWireNet Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: Magnolia Road Internet Cooperative.

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