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Property profile

423 13th St Antioch, CA 94509

OFF-MARKET
Apartment buildings
Property ID
US09-0070958
13,120 SF 0.53 ac lot Built 1973
Last sale Nov 2025 · $3,450,000
Entity Owned Owner of record is a legal entity (LLC / corporation). Absentee Owner Owner mailing address differs from the property address. ~ Est. High Equity Modeled equity is high. Estimate, not a fact.
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Property summary

AI-generated overview

This exceptional investment opportunity presents a 16-unit apartment building located at 423 E. 13th Street, Antioch, CA 94509. The property, built in 1973, consists of two, two-story buildings totaling 13,120 square feet on a 0.53-acre lot. All 16 units are spacious two-bedroom, one-bathroom apartments, each approximately 800 square feet. Currently boasting 100% occupancy, the property generates a strong NOI of $231,158, with a pro-forma NOI of $236,092, representing a 6.21% cap rate and a…

Ownership intelligence

Who controls the opportunity?

Owner of record from public deeds, plus portfolio, hold profile and investor signals where the data supports them. Included with a plan.

Owner contacts

Can we reach the decision maker?

Skip-traced phones and e-mails of the owner. Included with a plan.

Debts

What is owed, to whom, and when it comes due

Recorded lenders, amounts and estimated maturities of the owner's loan book — included with a plan.

Property tax · 2024

What does the county charge?
$33k
Tax billed · 2024
Assessed value$2.19M
Assessed land$656k
Assessed improvement$1.53M
Effective rate1.49%

Value estimate

· Oct 2026
$1.64M
$1.48M – $1.80M

Realmo valuation models over county records and 7 qualifying comparable sales.

Recently sold

What actually traded nearby?
$173/SF
Submarket average, outlier-cleaned · 20 recorded sales of this use type
Observed band · Q1–Q3$50 – $221
Qualifying comparables7

Cap rate analysis

How does the asset earn?

No income signal is modeled for this parcel yet — the Cap Rates tab runs the workflow.

Zoning insight

No data for this section
What can be built here?

No zoning code is on file for this parcel. Coverage grows with every catalog release.

JurisdictionCONTRA COSTA

Location intelligence

Which uses thrive at this corner?
Best fit: Dental Office
Demand heat for this use is drawn on the map · LocInt grid
Demand index
Dental Office17.2
Parking Facility14.8
Realty agency14.3

Location

423 13th St Antioch, CA 94509-1925
County assessor Recorded deeds · 4 transfers 7 qualifying comp sales Zoning catalog · not on file

Every figure names its source: public record, benchmark, or modeled. Coverage varies by property — thin data is stated as missing, never invented.

Comparables

6 recorded sales · 11 properties nearby
Recent sales nearby
6 recorded sales in this ZIP, last 8 years
Address Sale price Sold Size
618 7th, Antioch, CA 94509-1662 $1,250,000 Jul 2025 10,285 SF
927 Fitzuren, Antioch, CA 94509-4706 $1,995,000 Apr 2024 11,752 SF
1400 A, Antioch, CA 94509-2362 $443,000 Dec 2022 10,743 SF
414 Lawton, Antioch, CA 94509-3661 $461,000 Jun 2022 9,664 SF
3116 Lone Tree, Antioch, CA 94509-4941 $1,260,000 Jun 2021 8,269 SF
3417 Fairview, Antioch, CA 94509-4065 $2,100,000 May 2021 8,800 SF
Sale prices and dates as our records hold them, one row per building. A deed can cover more of a building than the size shown, so read the price against the size rather than dividing one by the other.
Comparable nearby
6 properties of the same type nearby
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