About this home

Discover Castlemonte Apartments, an 8-unit investment opportunity located at 13204 12th Ave SW in Burien. Built in 1988, the property features 6,260 rentable square feet across two structures on a 13,350 SF lot zoned MU-1. The unit mix includes a studio, six spacious two-bedroom apartments, and a detached 2-bedroom single-family rental with a private yard. One unit is non-conforming. Property amenities include private balconies and patios, 14 off-street parking stalls, common laundry, and select units with territorial views. Recent improvements include a composition roof installed in 2021. Offered at a 6.75% in-place cap rate, Castlemonte presents an opportunity to increase NOI through rental upside and operational improvements. The two-structure configuration also offers potential to explore subdividing and selling the single-family home separately, subject to buyer verification and municipal approval. Conveniently located near Downtown Burien, Sea-Tac Airport, and major employment centers throughout the Puget Sound region.

Exterior features

Wood Products

Property details

Heating: Forced Air
Cooling: None
Flooring: Vinyl Plank, Carpet
View: Bay
Sewer: Sewer Connected

Costs

Annual taxes: $17,385 (2026)

Estimate your monthly payment

$9,539/mo

Principal & interest: $8,090
Property taxes: $1,449

Down payment (20%) $320,000 Interest rate (%) Loan term (years)

Loan amount $1,280,000

Estimate only — excludes homeowner's insurance and PMI. Rates shown are not a quote. Talk to us to connect with a lender.

Location

Burien, WA 98146

Approximate location. Contact us to confirm the exact address.

Listing courtesy of Kidder Mathews— Max Frame.Listing data courtesy of the Northwest Multiple Listing Service (NWMLS). Information deemed reliable but not guaranteed and should be independently verified. All properties are subject to prior sale, change, or withdrawal.

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