450 S 40th St, Boulder, CO 80305 Property Records

Boulder County property record for 450 S 40th St, Boulder, CO 80305 · Last verified June 2026

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.75 ba · 2,660 sqft · built 1956
Lot Size	0.159 acres (6,913 sqft)
Owner	2 Individual Names on File
Last Sale	$975,000 (Feb 2026)
Tax Bill	$6,403 (2025)
Deeds & Mortgages	Feb 2026 Sale & Mortgage Mar 2021 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1577-05-4-23-018`

Property Details

APN / Parcel Number

Primary APN	`1577-05-4-23-018`
Alternative APNs	`R0009548` `0009548`

Interior

Bedrooms	4 Beds
Full Baths	2.75 Baths
Half Baths	1 Half Bath
Total Rooms	9 Rooms
Stories	1 Story
Building Area	2,660 sqft Living Area
Gross Area	3,136 sqft
1st Floor Area	1,400 sqft
Basement Area	1,400 sqft
Finished Basement	1,260 sqft
Unfinished Basement	140 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1956
Effective Year Built	Effective 1995
Architectural Style	Ranch
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	6,913 sqft (0.159 acres)
Garage Type	Attached
Garage Area	336 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0009548
Street Address	450 S 40TH ST
City	BOULDER
State	CO
Zip	80305-5420
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 18 BLK 6 MARTIN ACRES 2
Legal Range	70
Legal Township	1S
Legal Section	05
Legal Subdivision	MARTIN ACRES 2 - BO
Legal Block	6
Legal Lot Number	18
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3007
Census Tract	12507

Owner

Source: Boulder County records · APN 1577-05-4-23-018

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	8736 BADGER DR, ALEXANDRIA, VA 22309-4037
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Date	Document
Feb 23, 2026	Warranty Deed, Transfer · Conventional Mortgage FIRST HERITAGE MORTGAGE LLC
Mar 01, 2021	Intrafamily Transfer, Transfer · Conventional Mortgage FINANCIAL FUNDING SOLUTIONS INC
Jun 15, 2017	Warranty Deed, Transfer · Conventional Mortgage COMMERCE MORTGAGE

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Feb 23, 2026 · Amount on Record
Deed Sale	Feb 23, 2026 · Amount on Record
Prior Sale	Jun 15, 2017 · Amount on Record
Deed Document Number	20264120879
Prior Transfer Date	Feb 22, 2021
Prior Transfer Doc	0003863426
Record Updated	Sep 20, 2026

February 2026: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Feb 23, 2026
Property Address	450 S 40TH ST, BOULDER, CO 80305-5420
Document Number	0004120879
Instrument Date	Feb 20, 2026
Instrument	4120879
Transaction Type	Transfer
Record Updated	Mar 19, 2026

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$97.50
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	8736 BADGER DR, ALEXANDRIA, VA 22309-4037

Mortgage

Document Number	0004120880
Date	Feb 23, 2026
Instrument	4120880

Lender

Name	FIRST HERITAGE MORTGAGE LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Mar 01, 2056

March 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	BOULDER CO
Recording Date	Mar 01, 2021
Property Address	450 S 40TH ST, BOULDER, CO 80305-5420
Document Number	0003863426
Instrument Date	Feb 22, 2021
Instrument	3863426
Transaction Type	Transfer
Record Updated	Jul 26, 2022

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	1636 VIOLET AVE, BOULDER, CO 80304-0604

Mortgage

Document Number	0003863427
Date	Mar 01, 2021
Instrument	3863427

Lender

Name	FINANCIAL FUNDING SOLUTIONS INC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Mar 01, 2051

June 2017: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Jun 15, 2017
Property Address	450 S 40TH ST, BOULDER, CO 80305-5420
Document Number	0003597764
Instrument Date	Jun 13, 2017
Instrument	3597764
Transaction Type	Transfer
Record Updated	Jul 26, 2022
Title Company	LAND TITLE GUARANTEE CO

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$73.50
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	00000

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	450 S 40TH ST, BOULDER, CO 80305-5420

Mortgage

Document Number	0003597765
Date	Jun 15, 2017
Instrument	3597765

Lender

Name	COMMERCE MORTGAGE
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jul 01, 2047

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		$73,073 (+8.8%) Land $37,305 Building $35,768	$1,074,600 (-) Land $548,600 Building $526,000
2025	$6,403.00 (-1.42%)	$67,163 (-12.44%) Land $34,288 Building $32,875	$1,074,600 (-6.13%) Land $548,600 Building $526,000
2024	$6,495.00 (+1.8%)
2023	$6,380.00 (+16.06%)	$76,701 (+31.37%) Land $40,173 Building $36,528	$1,144,800 (+36.27%) Land $599,600 Building $545,200
2022	$5,497.00	$58,387 Land $29,802 Building $28,585	$840,100 Land $428,800 Building $411,300

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 080130125073, 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	Minimal
500-Year Floodplain	No
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	6 in force
Nearby Flood Claims	7 (1979–2022)
Claims Outside the SFHA	5 of 7
Most Recent Claim	Jul 2022, rainfall accumulation
Claims By Storm	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 5 claims

Wildfire

Wildfire Risk	Not rated no burnable land in reach
Wildfire Likelihood	Negligible
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, availability as of December 31, 2025 · Published October 2026 · based on 678 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

May also be available at this address: Lumen Technologies, AT&T. Availability varies by address; speeds are provider-advertised maximums, not measured.

Mobile Coverage

5G and 4G LTE

Nearby Properties on S 40th St

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

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