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

Boulder County property record for 310 S 40th St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	4 bd · 3.25 ba · 2,436 sqft · built 1956
Lot Size	0.167 acres (7,258 sqft)
Owner	Individual Name on File
Last Sale	$1,199,000 (Jun 2026)
Tax Bill	$6,094 (2025)
Deeds & Mortgages	Jun 2026 Sale & Mortgage Jul 2022 Sale & Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1577-05-4-23-006`

Property Details

APN / Parcel Number

Primary APN	`1577-05-4-23-006`
Alternative APNs	`R0009656` `0009656`

Interior

Bedrooms	4 Beds
Full Baths	3.25 Baths
Half Baths	1 Half Bath
Total Rooms	9 Rooms
Stories	1 Story
Building Area	2,436 sqft Living Area
Gross Area	2,524 sqft
1st Floor Area	1,372 sqft
Basement Area	1,152 sqft
Finished Basement	1,064 sqft
Unfinished Basement	88 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1956
Effective Year Built	Effective 2010
Architectural Style	Ranch
Exterior Material	Brick Veneer
Construction Type	Frame
Roof Material	Asphalt
Lot Area	7,258 sqft (0.167 acres)
Garage Type	Attached
Garage Area	220 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0009656
Street Address	310 S 40TH ST
City	BOULDER
State	CO
Zip	80305-5418
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 6 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	6
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3007
Census Tract	12507

Owner

310 S 40th St is owned and occupied by an individual who bought it in June 2026.

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

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

Owner of Record	Individual Name on File
Mailing Address	310 S 40TH ST, BOULDER, CO 80305-5418
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Jun 18, 2026	Special Warranty Deed, Transfer · Conventional Mortgage ELEVATIONS CREDIT UNION
Jul 5, 2022	Warranty Deed, Transfer · Conventional Mortgage ELEVATIONS CU
May 24, 2021	Deed of Trust, Mortgage · Line of Credit PREMIER MEMBERS CU

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Jun 18, 2026 · Amount on File
Deed Sale	Jun 18, 2026 · Amount on File
Prior Sale	Jul 5, 2022 · Amount on File
Deed Document Number	20264136685
Prior Transfer Date	Apr 4, 2003
Prior Transfer Doc	0002448151
Record Updated	Oct 29, 2026

June 2026: Special Warranty Deed, Transfer

Document Type	Special Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Jun 18, 2026
Property Address	310 S 40TH ST, BOULDER, CO 80305-5418
Document Number	0004136685
Instrument Date	Jun 18, 2026
Instrument	20264136685
Transaction Type	Transfer
Record Updated	Jun 30, 2026
Title Company	FIRST ALLIANCE TITLE

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$12,109.90
Amount Accuracy	Calculated from Transfer Tax
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	310 S 40TH ST, BOULDER, CO 80305-5418

Mortgage

Document Number	0004136686,
Date	Jun 18, 2026
Instrument	20264136686

Lender

Name	ELEVATIONS CREDIT UNION

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Jul 1, 2056

Interest

Rate Type	Fixed Rate
Rate	6.37%
Initial Type	Fixed Rate
Max Rate	-1%

July 2022: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Jul 5, 2022
Property Address	310 S 40TH ST, BOULDER, CO 80305-5418
Document Number	0003970103
Instrument Date	Jun 30, 2022
Instrument	3970103
Transaction Type	Transfer
Record Updated	Jul 22, 2022
Title Company	HERITAGE TITLE COMPANY, HERITAGE TITLE CO

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$110.00
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	310 S 40TH ST, BOULDER, CO 80305-5418

Mortgage

Document Number	0003970104
Date	Jul 5, 2022
Instrument	3970104

Lender

Name	ELEVATIONS CU
Type	Credit Union

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Jul 1, 2052

Interest

Rate Type	Adjustable Rate
Rate	4.37%
Adjustable	Adjustable Rate Rider
Type Change Date	Jul 1, 2029
Change Frequency	6 Months
Min Rate At Change	2.75%
Max Rate At Change	9.37%
Index	Other
Max Rate	9.37%

May 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	310 S 40TH ST, BOULDER, CO 80305-5418
Transaction Type	Mortgage
Record Updated	Jun 3, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003887362
Date	May 24, 2021
Instrument	3887362

Lender

Name	PREMIER MEMBERS CU
Type	Credit Union
Address	BOULDER, CO 80303

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	300 Months
Due	May 25, 2046

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

Tax Assessment & Valuation

The 2025 property tax bill for 310 S 40th St was $6,094.

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		$64,777 (+1.35%) Land $33,463 Building $31,314	$1,022,600 (-) Land $562,100 Building $460,500
2025	$6,094.00	$63,912 Land $35,131 Building $28,781	$1,022,600 Land $562,100 Building $460,500
2023	$5,913.00 (+29.61%)	$72,166 (+46.89%) Land $41,165 Building $31,001	$1,077,100 (+52.37%) Land $614,400 Building $462,700
2022	$4,562.00	$49,129 Land $30,531 Building $18,598	$706,900 Land $439,300 Building $267,600

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 310 S 40th St in Zone X, an area of minimal flood risk, though there have been 7 flood claims nearby since 1979.

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
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 Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 5 claims

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 310 S 40th St is low, with a 0.01% annual chance of 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	0.01% 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 678 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: AT&T.

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