423 Juniper Ave, Boulder, CO 80304 Property Records

Boulder County property record for 423 Juniper Ave, Boulder, CO 80304 · Last verified June 2026

Property Summary

Property Type	Single Family Home
Details	5 bd · 3.75 ba · 3,946 sqft · built 1967
Lot Size	0.637 acres (27,756 sqft)
Owner	2 Company Names on File
Last Sale	$5,250,000 (Oct 2023)
Tax Bill	$26,091 (2025)
Deeds & Mortgages	Oct 2023 Sale May 2019 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1461-24-1-00-080`

Property Details

APN / Parcel Number

Primary APN	`1461-24-1-00-080`
Alternative APNs	`R0009000` `0009000`

Interior

Bedrooms	5 Beds
Full Baths	3.75 Baths
Half Baths	1 Half Bath
Total Rooms	11 Rooms
Stories	2 Stories
Building Area	3,946 sqft Living Area
Gross Area	4,156 sqft
1st Floor Area	1,585 sqft
Upper Floors Area	1,311 sqft
Basement Area	1,260 sqft
Finished Basement	1,050 sqft
Unfinished Basement	210 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1967
Effective Year Built	Effective 2010
Exterior Material	Brick Veneer
Construction Type	Frame
Roof Material	Asphalt
Lot Area	27,756 sqft (0.637 acres)
Garage Type	Detached
Garage Area	856 sqft
Parking Spaces	5 Parking Spaces

Exterior Amenities

Porch	Porch
Porch Area	232 sqft
Deck Area	506 sqft
Patio Area	1,005 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0009000
Street Address	423 JUNIPER AVE
City	BOULDER
State	CO
Zip	80304-1715
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	TRACT 387-A LESS A-1 24-1N-71 BOOK 1308 PAGE 297 BCR
Legal Range	71
Legal Township	1N
Legal Section	24
Legal Subdivision	TR, NBR 128,158,172-178 FOOTHILLS
Legal Tract	387-A
Legal Block	2
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	2
Census Block	2009
Census Tract	12101

Owner

Source: Boulder County records · APN 1461-24-1-00-080

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 Company Names on File
Mailing Address	975 HAMILTON AVE, PALO ALTO, CA 94301-2213
Owner Type	Company
Vesting	Trust, Family Trust

Deeds, Mortgages & Sale History

Date	Document
Oct 10, 2023	Special Warranty Deed, Transfer LAND TITLE GUARANTY COMPANY IN, LAND TITLE GUARANTEE CO
May 30, 2019	Deed of Trust, Mortgage · ARM UBS BANK USA
Oct 12, 2018	Warranty Deed, Transfer · Line of Credit PETER A ALPAUGH

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Oct 10, 2023 · Amount on Record
Deed Sale	Oct 10, 2023 · Amount on Record
Prior Sale	Oct 12, 2018 · Amount on Record
Deed Document Number	20234024223
Last Transfer Date	Aug 18, 2025
Transfer Doc	0004099173
Record Updated	Sep 20, 2026

October 2023: Special Warranty Deed, Transfer

Document Type	Special Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Oct 10, 2023
Property Address	423 JUNIPER AVE, BOULDER, CO 80304-1715
Document Number	0004024223
Instrument Date	Oct 05, 2023
Instrument	4024223
Transaction Type	Transfer
Record Updated	Nov 08, 2023
Title Company	LAND TITLE GUARANTY COMPANY IN, LAND TITLE GUARANTEE CO

Transaction

Amount	Amount Recorded
Tax	$525.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	423 JUNIPER AVE, BOULDER, CO 80304-1715

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	423 JUNIPER AVE, BOULDER, CO 80304-1715

May 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	423 JUNIPER AVE, BOULDER, CO 80304-1715
Transaction Type	Mortgage
Record Updated	Feb 05, 2021
Title Company	LAND TITLE GUARANTEE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003715117
Date	May 30, 2019
Instrument	3715117

Lender

Name	UBS BANK USA
Type	Bank
Address	SALT LAKE CITY, UT 84111

Agreement

Type	ARM
Amount	Amount Recorded
Term	361 Months
Due	Jun 01, 2049

Interest

Rate Type	Adjustable Rate
Rate	2.87%
Adjustable	Adjustable Rate Rider
Type Change Date	Jun 01, 2024
Change Frequency	Annually
Min Rate At Change	2.25%
Max Rate At Change	7.87%
Index	1-Year LIBOR
Max Rate	7.87%

October 2018: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Oct 12, 2018
Property Address	423 JUNIPER AVE, BOULDER, CO 80304-1715
Document Number	0003680853
Instrument Date	Oct 10, 2018
Instrument	3680853
Transaction Type	Transfer
Record Updated	Oct 23, 2018
Title Company	FIRST AMERICAN TITLE

Transaction

Amount	Amount Recorded
Loan-to-Value (LTV)	LTV on Record
Tax	$357.50
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	2860 4TH ST BOULDER CO 803043043, BOULDER, CO 80304-3043

Mortgage

Document Number	3680923
Date	Oct 12, 2018
Instrument	3680923

Lender

Name	PETER A ALPAUGH
Address	8375 OLD STABLE RD, CINCINNATI, OH 45243-1441

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	360 Months
Due	Oct 11, 2048

Interest

Rate Type	Adjustable Rate

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		$297,717 (+8.8%) Land $196,581 Building $101,136	$4,378,200 (-) Land $2,890,900 Building $1,487,300
2025	$26,091.00 (-2.77%)	$273,637 (-11.46%) Land $180,681 Building $92,956	$4,378,200 (-5.08%) Land $2,890,900 Building $1,487,300
2024	$26,835.00 (+1.77%)
2023	$26,369.00 (+1.22%)	$309,038 (+10.16%) Land $197,188 Building $111,850	$4,612,500 (+14.27%) Land $2,943,100 Building $1,669,400
2022	$26,052.00	$280,544 Land $142,308 Building $138,236	$4,036,600 Land $2,047,600 Building $1,989,000

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 080130121012, 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
Nearest Special Flood Hazard Area	Zone AE, within 100 ft
Flood Insurance Cost	Premium on Record median of 63 individual NFIP policies nearby
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	63 in force
Nearby Flood Claims	25 (1990–2026)
Claims Outside the SFHA	17 of 25
Most Recent Claim	Jun 2026, rainfall accumulation
Claims By Storm	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 16 claims

Wildfire

Wildfire Risk	High above 76% of the US · above 76% of Colorado
Wildfire Likelihood	About 1 in 195 per year
Exposure	Direct burnable vegetation at the parcel

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 431 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

May also be available at this address: T-Mobile USA. Availability varies by address; speeds are provider-advertised maximums, not measured.

Mobile Coverage

5G (outdoors only) and 4G LTE

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