13204 12th Avenue SW · Burien, WA 98146
Source: NWMLS · Kidder Mathews · Max Frame #NWM2584770
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.
Location
Basics
- Property type
- Multi Family
- Style
- 5-9 Units
- Stories
- 4 stories
- Condition
- Good
- Year built
- 1988
- Building area
- 6,260 sq ft
- Lot size
- 13,350 sq ft (0.31 acres)
- County
- King
- MLS #
- NWM2584770
Interior
- Heating
- Forced Air
- Cooling
- None
- Flooring
- Vinyl Plank, Carpet
Exterior & lot
- Exterior features
- Wood Products
- Roof
- Composition
- Foundation
- Poured Concrete
- View
- Bay
- Waterfront
- No
Parking
- Parking spaces
- 8
Utilities
- Sewer
- Sewer Connected
- Power
- Electric
Community & fees
- Subdivision
- Burien
- Property tax
- $17,385 (2026)
Transaction
- Listed on
- Sep 18, 2026
- Days on market
- 2
- Listing terms
- Cash, Conventional
- Possession
- Closing
More homes nearby
Schools
School district: Highline
- High
- Highline High SchoolSchoolDigger 1 star · Top 85% in WA

Listing provided courtesy of: Kidder Mathews
Listing agent: Max Frame.
Based on information submitted to the MLS GRID as of —. 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. IDX information provided exclusively for consumers' personal, non-commercial use, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information is deemed reliable but not guaranteed.
Data last updated 2026-09-18.