340 31st St, Boulder, CO 80305 Property Records

Boulder County property record for 340 31st St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	3 bd · 1 ba · 1,382 sqft · built 1955
Lot Size	0.165 acres (7,192 sqft)
Owner	2 Individual Names on File
Last Sale	$436,000 (Jun 2010)
Tax Bill	$5,378 (2025)
Deeds & Mortgages	Feb 2021 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`1577-05-2-14-004`

Property Details

APN / Parcel Number

Primary APN	`1577-05-2-14-004`
Alternative APNs	`R0001525` `0001525`

Interior

Bedrooms	3 Beds
Full Baths	1 Bath
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,382 sqft Living Area
1st Floor Area	1,382 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1955
Effective Year Built	Effective 1990
Architectural Style	Ranch
Exterior Material	Combination
Construction Type	Frame
Roof Material	Asphalt
Lot Area	7,192 sqft (0.165 acres)
Garage Type	Detached
Garage Area	288 sqft
Parking Spaces	1 Parking Space
Porch	Porch
Porch Area	24 sqft
Patio Area	140 sqft

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0001525
Street Address	340 31ST ST
City	BOULDER
State	CO
Zip	80305-3405
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 5 BLK 12 HIGHLAND PARK 2
Legal Range	70
Legal Township	1S
Legal Section	05
Legal Subdivision	HIGHLAND PARK 2 - BO
Legal Block	12
Legal Lot Number	5
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	2
Census Block	2006
Census Tract	12507

Owner

340 31st St is owned and occupied by two individuals who bought it in June 2010.

Source: Boulder County records, as of September 18, 2026

Owner of Record	2 Individual Names on File
Mailing Address	340 31ST ST, BOULDER, CO 80305-3405
Occupancy	Owner Occupied
Owner Type	Individual

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jun 2, 2010 · Amount on File
Deed Sale	Jun 2, 2010 · Amount on File
Prior Sale	Jun 4, 2007 · Amount on File
Deed Document Number	20103077852
Prior Transfer Date	Dec 15, 2009
Prior Transfer Doc	0003062496
Record Updated	Oct 29, 2026

February 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	340 31ST ST, BOULDER, CO 80305-3405
Transaction Type	Mortgage
Record Updated	Mar 1, 2021
Title Company	FIRST AMERICAN TITLE, FIRST AMERICAN TITLE INS CO

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003859267
Date	Feb 16, 2021
Instrument	3859267

Lender

Name	COMMERCE HOME MORTGAGE LLC
Type	Mortgage Company
Address	IRVINE, CA 92606

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	181 Months
Due	Mar 1, 2036

Tax Assessment & Valuation

The 2025 property tax bill for 340 31st St was $5,378.

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		$56,610 (+0.36%) Land $26,670 Building $29,940	$902,500 (-) Land $462,200 Building $440,300
2025	$5,378.00	$56,407 Land $28,888 Building $27,519	$902,500 Land $462,200 Building $440,300
2023	$5,283.00 (+13.78%)	$64,869 (+29.74%) Land $33,982 Building $30,887	$968,200 (+34.58%) Land $507,200 Building $461,000
2022	$4,643.00	$49,998 Land $25,736 Building $24,262	$719,400 Land $370,300 Building $349,100

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

FEMA maps place 340 31st St in Zone X, an area of minimal flood risk, within 500 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 AH, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	9 in force
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

Wildfire risk around 340 31st St is low, with a 0.02% annual chance of wildfire.

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

Wildfire Risk	Low lower than 67% of the US · lower than 84% 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 451 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	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