Listed by Max Frame, Kidder Mathews
- 6,260
- Square feet
- $256
- Per sq ft
- Multi Family
- Type
- 1988
- Year built
- 13,350 sq ft
- Lot
- 0
- Days on market
About this property
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.
Location & commute
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Property details
Listing details
- Listing number
- #2584770
- Listed
- September 18, 2026
- Days on market
- 0
- Price per sq ft
- $256
Unit & building
- Stories in building
- 4
- Units in building
- 8
Parking
- Total spaces
- 8
Views
- View
- Bay
Construction
- Year built
- 1988
- Style
- 55 - 5-9 Units
- Structure
- Multi Family
- Roof
- Composition
Heating & cooling
- Heating
- Forced Air
- Cooling
- None
- Energy source
- Electric
Flooring
- Flooring
- Vinyl PlankCarpet
Lot
- Lot size
- 13,350 sq ft
Terms
- Terms offered
- CashConventional
Utilities
- Water
- King County Water
- Sewer
- Southwest Suburban Sewer District
- Power
- Seattle City Light
Schools
- District
- Highline
What stands out to you?
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- Bay
- Multi Family
- Composition
- Forced Air
- None
- Electric
- Vinyl Plank
- Carpet
- Cash
- Conventional
Listing history
Listed
$1,600,000
September 18, 2026
Derived from current MLS listing fields. Full multi-cycle status history is on the roadmap.
Payment estimate
An estimate to help you plan, not a loan offer or financial advice.
Est. monthly
$9,317
- Principal & interest
- $8,090
- Property tax (est.)
- $1,227
Assumes $320,000 down (20%), a $1,280,000 loan at 6.5% over 30 years. Property tax is an estimated figure, not MLS data (verify with the county assessor). Excludes insurance, PMI, and closing costs. Not a commitment to lend or financial advice.
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Based on information submitted to the MLS GRID as of September 18, 2026 at 8:00 PM PDT. 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.