148 Mortensen Ln, Spearfish, SD 57783 Property Records

Lawrence County property record for 148 Mortensen Ln, Spearfish, SD 57783 · Last verified June 2026

Property Summary

Property Type	Single Family Home
Details	2 ba · 1,163 sqft · built 1950
Lot Size	2.51 acres (109,336 sqft)
Owner	Company Name on File
Tax Bill	$4,424 (2025)
Flood Zone	Zone X (minimal risk)
APN	`32320-00090-101-02`

Property Details

APN / Parcel Number

Primary APN	`32320-00090-101-02`
Alternative APN	`R18346`

Interior

Full Baths	2 Baths
Plumbing Fixtures	6 Plumbing Fixtures
Building Area	1,163 sqft Living Area
1st Floor Area	1,163 sqft
Basement Area	1,064 sqft
Unfinished Basement	1,064 sqft

Exterior

Year Built	Built 1950
Effective Year Built	Effective 1950
Lot Area	109,336 sqft (2.51 acres)
Garage Area	576 sqft
Parking Spaces	2 Parking Spaces
Total Buildings	2 Buildings

Location & Zoning

Account Number	R18346
Street Address	148 MORTENSEN LN
City	SPEARFISH
State	SD
Zip	57783-1015
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	HILLSVIEW ADDITION TRACTS A & B NW1/4 NE1/4 S1/2 OF LOT 1 & PORTION VACATED MORTENSON LANE ROW (4140SF) PLAT 1998-05444
Legal Subdivision	HILLSVIEW ADDITION
Legal Tract	A
Legal Lot Number	1
Jurisdiction	LAWRENCE SD
Township / Civil Division	SPEARFISH
Census Block Group	2
Census Block	2014
Census Tract	966301

Owner

Source: Lawrence County records · APN 32320-00090-101-02

Assessment roll updated September 2, 2025 · 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	Company Name on File
Mailing Address	PO BOX 910, SPEARFISH, SD 57783-0910
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Record Updated	Sep 20, 2026

Tax Assessment & Valuation

Source: Lawrence County records · Assessment roll updated September 2, 2025 · Last verified June 2026

Property Jurisdictions

Type	Name
State	South Dakota
County	Lawrence County
Municipality	Spearfish City
Unified School District	Spearfish School District 40-2 (PK - 12)

Tax Bill & Assessment History

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$4,424.00 (-2.75%)	$338,470 (+20.12%) Land $67,530 Building $270,940
2024	$4,549.00 (-1.88%)
2023			$351,240 Land $67,530 Building $283,710
2022	$4,636.00	$281,780 Land $67,530 Building $214,250

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Lawrence County (46081C), updated April 29, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 460819663012, 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
Flood Insurance Cost	Premium on Record median of 10 individual NFIP policies nearby
Community Rating System	Class 9 (5% premium discount)
Nearby Flood Policies	10 in force
Nearby Flood Claims	3 (1997–2013)
Claims Outside the SFHA	1 of 3
Most Recent Claim	Jun 2013, rainfall accumulation

Wildfire

Wildfire Risk	Moderate above 40% of the US · above 28% of South Dakota
Wildfire Likelihood	About 1 in 1,515 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 115 locations within about half a mile of this property

Provider	Technology	Download / Upload (Mbps)
Midcontinent Communications	Cable	1,250 / 250
Clarity Telecom	Cable	1,000 / 30
BHT Investment Holdings	Fixed Wireless (licensed-by-rule)	100 / 20
AT&T	Fixed Wireless	100 / 20
T-Mobile USA	Fixed Wireless	100 / 20

May also be available at this address: Clarity Telecom, Verizon. Availability varies by address; speeds are provider-advertised maximums, not measured.