2. 420 Third Ave Seward AK
420 Third Ave Seward AK

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420 Third Ave Seward, AK

420 Third Ave Seward, AK 99664 was built in 2018 The property has a lot size of 9,148 Sq Ft lot and is listed as a Single Family. The property is currently not for sale. Current estimates place the value near 583,000, reflecting a -21% change over the past year, with 3 beds, 3.5 baths, and approximately 2,803 sq ft of living space. If you are looking to buy or rent a property, use USPhoneBook's property database to avoid rental scams, understand tax liabilities, and get a sense of the property's value over time. You can also check out the neighborhood section and see nearby homes, last sold for prices, tax records and more.
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Public Facts

 
Last sold Oct 13, 2025
3
Beds
3.5
Baths
2,803
Sqft
Off Market
$583,000 estimated value
Built in 2018
$208/sqft
9,148 lot sqft
$300 HOA fees

Property characteristics

Property type
Residential
Zoning type
Single Family
APN
148-100-23
Parking
2
Subdivision
Original
Stories
1

Property History

Over the last 12 months, the sales price of 420 Third Ave Seward, AK 99664 has decreased by -21%.

Price History

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Year Price Price/Sq Ft
2026 $ 601,000 -21 % $ 214
2025 $ 764,000 16 % $ 273
2024 $ 654,000 37 % $ 233
2023 $ 475,000 ---- $ 169

Tax History

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Year Taxes Assesments
2025 ---- $ 738,700
2024 $ 6,449 6 % $ 705,600
2023 $ 6,064 18 % $ 663,500
2022 $ 5,117 -15 % $ 562,900
2021 $ 6,065 ---- $ 652,800
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Owner

Mary Koster Mary Beth Koster , Age 62

Lives at Po Box 3095, Seward, AK 99664-3095
Relatives: Andrew Koster, Earl Zimmerle, Marianne Zimmerle, Brian Zimmerle, Bryce Zimmerle, Ean Zimmerle, Jennifer Zimmerle, Alan Pritchard, Daniel Zimmerle
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People Living at 420 Third Ave Seward, AK

Mary Koster Mary Beth Koster , Age 62

Lives at Po Box 3095, Seward, AK 99664-3095 Seward AK 99664 Po Box 3095
Prior addresses: 420 Third AVE, Seward, AK 99664 Seward AK 99664 420 Third AVE 15110 Goodrich DR NW, Gig Harbor, WA 98329-8740 Gig Harbor WA 98329 15110 Goodrich DR NW 524 Second Ave, Seward, AK 99664-4309 Seward AK 99664 524 Second Ave
Relatives: Andrew Koster, Earl Zimmerle, Marianne Zimmerle, Brian Zimmerle, Bryce Zimmerle, Ean Zimmerle, Jennifer Zimmerle, Alan Pritchard, Daniel Zimmerle
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Andrew Koster Andrew Philip Koster , Age 59

Lives at 524 Second AVE, Seward, AK 99664-4309 Seward AK 99664 524 Second AVE
Prior addresses: 15110 Goodrich DR NW, Gig Harbor, WA 98329-8740 Gig Harbor WA 98329 15110 Goodrich DR NW 420 Third AVE, Seward, AK 99664 Seward AK 99664 420 Third AVE 420 3rd Ave, Seward, AK 99664 Seward AK 99664 420 3rd Ave
Relatives: Mary Koster, Earl Zimmerle, Marianne Zimmerle, Alan Pritchard, Brian Zimmerle, Bryce Zimmerle, Ean Zimmerle, Jennifer Zimmerle, Pamela Pritchard
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James Herbert James W Herbert , Age 78

Lives at Po Box 645, Homer, AK 99603-0645 Homer AK 99603 Po Box 645
Prior addresses: 56749 E End Rd, Homer, AK 99603-9572 Homer AK 99603 56749 E End Rd 5205 Kachemak Dr, Homer, AK 99603-9478 Homer AK 99603 5205 Kachemak Dr 420 3rd Ave, Seward, AK 99664 Seward AK 99664 420 3rd Ave
Relatives: David Herbert, Jill Herbert, Margaret Herbert, Maggie Herbert
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David Herbert David William Herbert , Age 35

Lives at 8150 Country Woods Dr, Anchorage, AK 99502-4672 Anchorage AK 99502 8150 Country Woods Dr
Prior addresses: 8186 Country Woods DR, Anchorage, AK 99502-4672 Anchorage AK 99502 8186 Country Woods DR 420 Third AVE, Seward, AK 99664 Seward AK 99664 420 Third AVE
Relatives: James Herbert, Jill Herbert, Maggie Herbert, Margaret Herbert
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Margaret Herbert Margaret Elizabeth Herbert , Age 32

Lives at 8186 Country Woods Dr, Anchorage, AK 99502-4672 Anchorage AK 99502 8186 Country Woods Dr
Prior addresses: 962 Daffodil St, Fountain, CO 80817-4148 Fountain CO 80817 962 Daffodil St 8141 E 6th Ave, Anchorage, AK 99504-2050 Anchorage AK 99504 8141 E 6th Ave 37457 Rascal Ln, Anchor Point, AK 99556-9400 Anchor Point AK 99556 37457 Rascal Ln
Relatives: David Herbert, James Herbert, Jill Herbert, Maggie Herbert, Margaret Herbert
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Jill Herbert Jill Elizabeth Herbert , Age 71

Lives at 66685 Fry CT, Homer, AK 99603-9287 Homer AK 99603 66685 Fry CT
Prior addresses: Po Box 645, Homer, AK 99603-0645 Homer AK 99603 Po Box 645 8150 Country Woods Dr, Anchorage, AK 99502-4672 Anchorage AK 99502 8150 Country Woods Dr 420 3rd Ave, Seward, AK 99664 Seward AK 99664 420 3rd Ave
Relatives: David Herbert, James Herbert, Margaret Herbert, Maggie Herbert
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Esther Werner Esther Werner , Age 109

Lives at 2020 Muldoon Rd, Unit 230, Anchorage, AK 99504-3667 Anchorage AK 99504 2020 Muldoon Rd, Unit 230
Prior addresses: 3537 Cottonwood St, Anchorage, AK 99508-4326 Anchorage AK 99508 3537 Cottonwood St 420 Third AVE, Seward, AK 99664 Seward AK 99664 420 Third AVE Po Box 169, Seward, AK 99664-0169 Seward AK 99664 Po Box 169
Relatives: Cheryl Werner, Dustin Werner, Jeffrey Werner, John Werner, Annaliese Werner, April Werner, Claire Werner, Jerome Tiemessen, Mary Tiemessen
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Neighbors

422 Third Ave
Seward, AK
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419 Fourth Ave
Seward, AK
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417 Fourth Ave
Seward, AK
View Property Report
425 Fourth Ave
Seward, AK
View Property Report

FAQs

Who lives at 420 Third Ave, Seward, AK 99664?
According to our records, the current person living in 420 Third Ave is Mary Koster.
Is this property currently for sale?
The property is not for sale. Use USPhoneBook to review nearby listings or compare similar homes in the area.
What is the estimated value of this property?
The estimated value is $583,000, reflecting a -21% change over the past year. You can explore price history and tax records to see how the value has changed over time.
How big is this property?
It features approximately 2,803 sq ft of living space on a 9,148 sq ft lot, built in 2018 and classified as a Single Family.
What nearby properties can I compare this to?
Nearby homes include 422 Third Ave, 419 Fourth Ave, and 417 Fourth Ave, each with its own property report to help compare size, value, and residents.