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Verified with the state on Oct 26, 2026

Four By Four Construction Co

La Jolla, San Diego County4.2 on Google (5 reviews)Licensed 35.1 years

Verified with the State of California

License
Active, no disciplinary actionsPass
Classification
B, General BuildingPass
Licensed since
Sep 30, 1991, 35.1 yearsPass
Contractor bond
On file with WESTERN SURETYPass
Workers' comp
InsuredPass
Contractors State License Board record · checked Oct 26, 2026

The full state record

Straight from the Contractors State License Board data portal. How we matched this builder to the record: license number on builder's website.

Legal name
FOUR BY FOUR CONSTRUCTION INC
Business type
Corporation
License number
#629765
Classification
B, General Building
License issued
Sep 30, 1991
License expires
Sep 30, 2027
Bond surety
WESTERN SURETY COMPANY
Bond number
64937235
Bond effective
Jan 1, 2023
Workers' comp
Workers' Compensation Insurance
Insurer
INSURANCE COMPANY OF THE WEST
Policy expires
Nov 1, 2026
Confirm license #629765 on cslb.ca.gov

Four By Four Construction Co's ADU track record

ADUs finished
1

final inspection passed, City of San Diego

ADU permits pulled
1

under the company's own name

Typical permit to final
13 mo

median, from permit issued to final inspection

Google rating
4.2

5 reviews

Recently finished ADUs

From the City of San Diego's open permit data. It counts permits pulled under the company's own name; ADUs where a designer or the homeowner pulled the permit, and work in other cities, aren't included, so the true number can be higher.

Why they're listed as an ADU builder: ADU permits in the City of San Diego.

Before you sign with Four By Four Construction Co

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Four By Four Construction Co is listed because its license passed our checks. Listing is free and isn't an endorsement; we don't take part in your contract. Details change, so confirm the license at cslb.ca.gov before you sign.