$980,000
Est. $5,428/mo4 bd•1.75 ba•1,810 sq ft
18434 42nd Avenue S, SeaTac, WA 98188
• Listed Oct 16, 2026•1 day active · 1 cumulative
Listing Broker: KW Lake Washington So; David P. Huynh; 206-354-0401; david@thekoigroup.com
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Listing Broker: KW Lake Washington So; David P. Huynh; 206-354-0401; david@thekoigroup.com
About this home
Welcome Home! Discover an exceptional opportunity in the heart of SeaTac, where comfort, versatility, and investment potential come together! Beautifully maintained and thoughtfully updated, this spacious 4-bedroom home offers nearly 2,000 sq ft of living space across two levels, complemented by an impressive 1,200 sq ft garage and 360 sq ft attached workshop. The inviting upper level features a bright, open living area with a cozy fireplace, dining space, kitchen and two generous bedrooms. Downstairs, two additional bedrooms, a bathroom, and a second living area offer incredible flexibility for guests, multi-generational living or potential rental income. Extensive improvements provide added peace of mind, including a newer roof, updated plumbing, electrical panel, heating and A/C systems, remodeled upper level, beautifully updated downstairs bathroom and refreshed front and back decks. The oversized garage and workshop create endless possibilities for vehicles, storage, hobbies and more! Ideally situated just minutes from SeaTac Airport, light rail, Southcenter shopping and dining, Boeing, parks and major commuter routes, this prime location offers exceptional convenience and connectivity throughout the Puget Sound region. Whether you're seeking a spacious personal residence, multi-generational living or an investment opportunity, this remarkable property delivers an outstanding combination of space, functionality and long-term potential!
Listed by David P. Huynh • KW Lake Washington So
Listing updated: October 17, 2026 at 05:03am
RexMont checked: moments ago
Source: NWMLS as Distributed by MLS Grid #2594827
Around this home
How much should you offer?
18434 42nd Avenue S, SeaTac, WA 98188
Source:RexMont analysis of Northwest MLS sales data for this ZIP code plus third-party market data (RentCast). The estimates are RexMont's, not Northwest MLS listing data.
Estimates only and not guaranteed. Consult a RexMont agent for accurate, personalized guidance before making an offer. RexMont OfferEdge™ · © 2026 RexMont Real Estate. Proprietary tool.
Property details
Interior features
- Second Kitchen
- Dbl Pane/Storm Window
- Dining Room
- Fireplace
- Skylight(s)
- Water Heater
- 2 fireplaces (wood burning)
- Daylight basement
Kitchen
- Dishwasher
- Disposal
- Dryer
- Microwave
- Refrigerator
- Stove(s)/Range(s)
Bedrooms
- 4 bedrooms total
- 2 on the main level
- 2 on the lower level
Bathrooms
- 1 full bathroom
- 1 three-quarter bathroom (shower, no tub)
- 1.75 bathrooms total (NWMLS count)
- 1 on the main level
Layout
- Split Entry
- 1,810 sq ft finished, 530 sq ft unfinished
- 1,200 sq ft garage
Flooring
- Ceramic Tile
- Hardwood
- Carpet
Heating & cooling
- Forced Air heating
- Heat Pump cooling
Schools
Ratings via SchoolDiggerHighline School District
- Bow Lake ElementaryPublic · Grades PK-5 · State rank 1,067 of 1,1381/10
- Chinook Middle SchoolPublic · Grades 6-8 · State rank 463 of 5142/10
- Tyee High SchoolPublic · Grades 9-12 · State rank 356 of 3962/10
Assigned schools for this property per the listing's MLS data. School district boundaries change — verify the exact assigned schools with the district before purchasing.
Single-family home facts
As entered by the listing broker on Northwest MLS
Lot & site
- Topography
- Level
- Lot number
- 1
Systems
- Energy source
- Electric,Natural Gas
- Power production
- Electric, Natural Gas
- Water heater
- Gas
- Water heater location
- Lower Level Utility Closet
- Power company
- PSE
- Water company
- Highline Water
- Sewer company
- Midway Sewer
- Gas company
- PSE
- Irrigation water rights
- No
- Internet connected
- Xfinity
- Cable connected
- Xfinity
Rooms & extras
- Bathtubs
- 1
- Showers
- 2
- Fireplaces on main
- 1
- Fireplaces lower level
- 1
New construction
- Square footage source
- Public Records
- Lot size source
- Public Records
Manufactured home
- Land lease
- No
Neighborhood mobility
Doorstep, Pedal & Station Scores
Three RexMont scores for this exact address: what is on foot, what is by bike, and what rides past the door.
Ground Truth™
The ground, the slope, the flood zone and the noise at this address
Read from public hazard, flood, terrain and noise maps for this exact home.
Address Insider™
The members' report
Commute, transit, zoning and ADU potential, internet providers and the lifestyle around the home: the nearest grocery, coffee, park, services and transit stop. One free registration opens every home on rexmont.com.
Opens with the report above.
Sales & Tax Records for 18434 42nd Avenue S
NWMLS via MLS Grid · King County AssessorEvery listing, pending, price change and closing filed on this home with the NWMLS, the county’s recorded sales, and its assessed values by tax year.
- Oct 16, 2026ListedNWMLS via MLS Grid · #2594827$980,000$541/sq ft
Down payment assistance
6 programs may be available to provide you with up to $55,000 in down payment assistance, depending on your specific information.
Northwest MLS lists this home as eligible for down payment assistance programs
Source: program list compiled by RexMont from ARCH (A Regional Coalition for Housing) member-jurisdiction information. This is not Northwest MLS listing data.
Mortgage payment forecast
$6,292 per month
Great rateTakes about 5 minutes & won't affect your credit
Get pre-approvedSource: RexMont estimate, not Northwest MLS listing data. Interest rates from Freddie Mac's Primary Mortgage Market Survey via FRED (Federal Reserve Bank of St. Louis). Property tax and HOA dues from the NWMLS listing where provided, otherwise estimated; insurance estimated at 0.3% of price per year.
Estimate only. Actual payment depends on credit, lender, and program. PMI not included for down payments below 20%.
Ask about this home
A licensed RexMont broker will get back to you, usually in under 5 minutes during business hours.
Listing Broker: KW Lake Washington So; David P. Huynh; 206-354-0401; david@thekoigroup.com
Market pulse
SeaTac is a balanced market.
Supply and demand are roughly in balance. Neither side has a clear edge.
Offer insight: Homes typically sell with one offer near asking price.
List to sale price: The average home sells very close to list price.
Time on market: The average home goes pending in around 66 days.
Recent sales nearby
Within 1 mile · last 6 months$940,000 Sold
1 day ago
3 bd•1.75 ba•~2,960 sq ft•Single Family
3737 S 194th Street, SeaTac, WA 98188
6%
Under list
63
Days on market
0.6 mi
Distance
$650,000 Sold
1 day ago
3 bd•2.25 ba•~1,340 sq ft•Single Family
17324 40th Avenue S, SeaTac, WA 98188
0%
Over list
9
Days on market
0.7 mi
Distance
$525,000 Sold
2 days ago
3 bd•1.5 ba•~1,219 sq ft•Single Family
4815 S 184th Street, SeaTac, WA 98188
3%
Under list
90
Days on market
0.4 mi
Distance
$134,000 Sold
1 week ago
2 bd•1.75 ba•Single Family
18100 36th Avenue S #389, SeaTac, WA 98188
3%
Under list
57
Days on market
0.4 mi
Distance
$535,000 Sold
1 week ago
3 bd•1 ba•~1,170 sq ft•Single Family
17953 48th Avenue S, SeaTac, WA 98188
2%
Under list
87
Days on market
0.4 mi
Distance
Closed sales from MLS GRID / NWMLS within the past 6 months, matched on property type and within 1 mile. Comps approximate.
Want a deeper read on this market?
Ask a RexMont agentMarket data from MLS GRID / NWMLS · Updated Oct 2026
Information and statistics derived from Northwest Multiple Listing Service. Source: Northwest Multiple Listing Service, as distributed by MLS GRID.
MLS GRID Disclaimer
Based on information submitted to the MLS GRID as of October 17, 2026 at 11:22 AM PT (date and time MLS GRID Data was obtained). All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.
Listing information courtesy of Northwest Multiple Listing Service (NWMLS). The listing data relating to real estate for sale on this web site comes in part from the Northwest Multiple Listing Service. Real estate listings held by brokerage firms other than RexMont Real Estate are marked with the “Listing courtesy of NWMLS” designation. Information provided is for the consumer’s personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
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© 2026 Northwest Multiple Listing Service. All rights reserved.
HO
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