Is parking easy in Keystone, SD?

As of early 2026, 100% of users say parking is easy

Do residents of Keystone, SD plan to stay at least 5 years?

As of early 2026, 100% of users say they plan to stay for at least 5 years

Are the streets well-lit in Keystone, SD?

As of early 2026, 100% of users say streets are well-lit

Is there wildlife in Keystone, SD?

As of early 2026, 50% of users say there's wildlife

Are neighbors friendly in Keystone, SD?

As of early 2026, 18% of users say neighbors are friendly

What is 403 3rd St estimated to be worth?

Trulia's estimated value for 403 3rd St in Keystone, SD is $128,300 .

Is Keystone a buyer's or seller's market?

Keystone is currently a buyer's market, based on recent for-sale activity.

What are the closest schools to 403 3rd St?

The closest schools to 403 3rd St in Keystone, SD are Hill City Elementary - 02 (Pre-K, rated 7/10), Hill City High School - 01 (rated 9/10), Hill City Middle School - 04 (rated 5/10).

How big is the lot at 403 3rd St?

The lot at 403 3rd St in Keystone, SD is about 0.49 acres (21,344 sq ft).

OFF MARKET

$128,300

Trulia Estimate

Studio
938 sqft (on 0.49 acres)

403 3rd St, Keystone, SD 57751

Est. Refi. Payment $883/mo*

Refinance Your Home

Home Value

Trulia Estimate

$128K

Since last month

$2K (+1.3%)

Since last year

$19K (-13.1%)

Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value decreased by -59% in the last 10 years

Month	Estimated value
2026
September 2026	$128K
August 2026	$127K
July 2026	$136K
June 2026	$136K
May 2026	$149K
April 2026	$134K
March 2026	$132K
February 2026	$130K
January 2026	$126K
2025
December 2025	$131K
November 2025	$130K
October 2025	$129K
September 2025	$148K
August 2025	$142K
July 2025	$139K
June 2025	$126K
May 2025	$143K
April 2025	$135K
March 2025	$141K
January 2025	$147K
2024
December 2024	$137K
November 2024	$127K
October 2024	$124K
September 2024	$123K
August 2024	$113K
July 2024	$121K
June 2024	$122K
May 2024	$127K
April 2024	$118K
March 2024	$121K
February 2024	$113K
January 2024	$124K
2023
December 2023	$110K
November 2023	$99K
October 2023	$102K
September 2023	$116K
August 2023	$117K
July 2023	$127K
June 2023	$123K
April 2023	$131K
March 2023	$127K
February 2023	$121K
January 2023	$122K
2022
December 2022	$119K
November 2022	$123K
October 2022	$129K
September 2022	$127K
August 2022	$129K
July 2022	$128K
June 2022	$128K
May 2022	$127K
April 2022	$122K
2021
May 2021	$255K
April 2021	$245K
March 2021	$236K
February 2021	$244K
January 2021	$259K
2020
December 2020	$246K
November 2020	$232K
October 2020	$267K
September 2020	$306K
August 2020	$254K
July 2020	$248K
June 2020	$295K
May 2020	$320K
April 2020	$290K
March 2020	$290K
February 2020	$326K
January 2020	$326K
2019
December 2019	$305K
November 2019	$320K
October 2019	$316K

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.

Address	Distance	Property Type	Sold Price	Sold Date	Bed	Bath	Sqft
23747 Claim Jumper Rd, Rapid City, SD	5.00	Mobile / Manufactured	$153,827	06/12/26	3	1	679
23648 Busted Five Ct, Rapid City, SD	7.12	Mobile / Manufactured	$329,900	03/12/26	3	2	1,665
23570 Highway 385, Rapid City, SD	7.34	Mobile / Manufactured	$75,500	02/04/26	1	1	374

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.

Address	Distance	Price	Bed	Bath	Sqft	Status
601 Caseys Ct, Keystone, SD 57751	0.33	$631,800	3	2.5	3,064	Off Market
620 Casey Ct, Keystone, SD 57751	0.33	$525,400	3	2	2,178	Off Market
907 Fouse St, Keystone, SD 57751	0.63	$440,000	6	2.5	2,238	For Sale
1013 Front St, Keystone, SD 57751	0.70	$636,800	6	-	1,500	Off Market
Trackers Trl, Keystone, SD 57751	1.09	$425,000	-	-	-	For Sale
Lots 9 & 11 Hwy #40, Keystone, SD 57751	1.10	-	-	-	-	Off Market
Pretty Flower Ln, Keystone, SD 57751	1.10	-	-	-	-	Off Market
Dan Patch 4 Lafferty Gulch, Keystone, SD 57751	1.20	-	-	-	-	Off Market
LOT Of 3r Granite Point #A, Keystone, SD 57751	1.40	-	-	-	-	Off Market
24227 Granite Point Ct, Keystone, SD 57751	1.40	$499,900	2	1.5	1,123	For Sale
LOT Of 3r Granite Point #B, Keystone, SD 57751	1.41	-	-	-	-	Off Market
24226 Granite Point Ct, Keystone, SD 57751	1.44	$364,800	3	2	1,608	Off Market

Local Information

Map ViewExplore the area around 403 3rd St.
Schools1 Preschool School1 Elementary School1 Middle School1 High School
Shop & Eat

-- mins to

Commute Destination

Home Highlights

Mobile/Manufactured

Built in 1978

0.49 acre lot

938 sqft

$137/sqft

About this House

This mobile / manufactured is located at 403 3rd St, Keystone, SD. 403 3rd St is in Keystone, SD and in ZIP code 57751. This property has approximately 938 sqft of floor space. This property has a lot size of 0.49 acres and was built in 1978.

403 3rd St, Keystone, SD 57751 is a studio, 938 sqft mobile/manufactured built in 1978. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $128,300.

Home Details for 403 3rd St

Property Information
Year Built Year Built: 1978
Property Type / Style Property Type: Mobile Manufactured

Lot Information
Lot Area: 0.49 acres

Price and Tax history

Year	Property tax	Tax assessment
2025	$671	$65,100

Home facts updated by county records

Additional Cost

Market trends in Keystone

Last updated August 2026

Avg. sale price

—

Sale-to-List Price

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Price per sq ft

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Available listings

3MoM

Around this home

Hill City Elementary - 02
PK-5
Public
225 Students
Hill City School District 51-2
7/10
GreatSchools Rating
Parent Rating Average
My children received an outstanding education. Hill City Elementary has amazing educators!
Parent Review
1y ago
3 Reviews

View nearby schools on GreatSchools

The GreatSchools Rating compares schools on a variety of school quality indicators including test scores, college readiness, equity and more. Learn more.

What Locals Say about Keystone

At least 1 Trulia users voted on each feature.

100 % Say parking is easy
100 % Say they plan to stay for at least 5 years
100 % Say streets are well-lit
50 % Say there's wildlife
18 % Say neighbors are friendly

Sourced by Trulia users. Learn more about our methodology.

LGBTQ Local Legal Protections

Frequently asked questions about 403 3rd St

What is 403 3rd St estimated to be worth?
Trulia's estimated value for 403 3rd St in Keystone, SD is $128,300.
Is Keystone a buyer's or seller's market?
Keystone is currently a buyer's market, based on recent for-sale activity.
What are the closest schools to 403 3rd St?
The closest schools to 403 3rd St in Keystone, SD are Hill City Elementary - 02 (Pre-K, rated 7/10), Hill City High School - 01 (rated 9/10), Hill City Middle School - 04 (rated 5/10).
How big is the lot at 403 3rd St?
The lot at 403 3rd St in Keystone, SD is about 0.49 acres (21,344 sq ft).