21 Columbia St, San Diego, CA 92103

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Beds

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Baths

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Sq ft

About this home

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.

Type

Residential

Year built

1933

Lot

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Garage

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HOA

None

Pool

View

Bay

Solar

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Estimated payment

$9,428/mo

Principal & interest$7,560
Property tax (est.)$1,433
Home insurance (est.)$436

Down payment: 20% ($299,000)Interest rate %

Example only, not a loan offer. Rate is a placeholder; ask a lender for today's. Taxes vary by neighborhood (Mello-Roos).

Listing provided courtesy of Craig Everett, Advent Real Estate. MLS# 260025156SD. Based on information from California Regional Multiple Listing Service, Inc. as of November 1, 2026 at 10:09 AM Pacific. Information is deemed reliable but not guaranteed and is provided exclusively for consumers' personal, non-commercial use to identify prospective properties they may be interested in purchasing. Coldwell Banker Associated Brokers Realty, CA DRE #00939614.