3319 21 Columbia St San Diego, CA 92103
Listing Courtesy of: CRMLS / Listed By: Craig Everett, Advent Real Estate

  3319 21 Columbia St San Diego, CA 92103

Active (1 Days)
$1,495,000 (USD)
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Description

Discover this remarkably maintained two-story duplex, originally built in 1933 and carefully preserved both inside and out. The updated units are currently occupied by excellent, long-term tenants, offering immediate rental income and a smooth transition for the next owner. The exterior is clean, well-kept, and presents beautifully, while the oversized lot provides ample space to garden, relax, or explore future possibilities—including the potential to add one or more ADUs in the rear. Whether you’re looking for a solid turnkey investment or a property with room to grow, this classic duplex delivers character, reliability, and opportunity. Don’t miss the chance to see everything it has to offer—schedule your private showing today!

MLS #:
260025156SD
Type
Multifamily
Year Built
1933
Views
Panoramic, Bay
County
San Diego County
Community
Middletown

Listed By

Craig Everett, Advent Real Estate
Source
CRMLS
Last checked Oct 18 2026 at 12:13 PM GMT+0000
Bathroom Details
Interior Features
  • Gas Water Heater
Subdivision
  • Middletown
Heating and Cooling
  • Natural Gas
  • Wall/Window Unit(s)
Exterior Features
  • Roof: Composition
  • Roof: Rolled/Hot Mop
Stories
  • 2
Location
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Disclaimer: Based on information from California Regional Multiple Listing Service, Inc. as of {10/18/26 05:13} and /or other sources. Display of MLS data is deemed reliable but is not guaranteed accurate by the MLS. The Broker/Agent providing the information contained herein may or may not have been the Listing and/or Selling Agent. The information being provided by Conejo Simi Moorpark Association of REALTORS® (“CSMAR”) is for the visitor's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties visitor may be interested in purchasing. Any information relating to a property referenced on this web site comes from the Internet Data Exchange (“IDX”) program of CSMAR. This web site may reference real estate listing(s) held by a brokerage firm other than the broker and/or agent who owns this web site. Any information relating to a property, regardless of source, including but not limited to square footages and lot sizes, is deemed reliable.