Is JEFF CASTO CONSTRUCTION a real contractor?

JEFF CASTO CONSTRUCTION appears in public building-permit records with 11 permits filed through 2026 in and around Marin County, CA. Permits are filed with local government before work begins, so this is a matter of public record, not a self-reported listing.

How is JEFF CASTO CONSTRUCTION's track record verified?

Every figure on this page comes from building permits pulled from municipal records and matched to JEFF CASTO CONSTRUCTION by the contractor name on each permit. Permit records cannot be purchased or faked the way online reviews can, which makes them a stronger signal of real, completed work.

Is JEFF CASTO CONSTRUCTION licensed and insured?

This profile is built from permit records, which confirm permitted work but do not include license status. JEFF CASTO CONSTRUCTION has not claimed this profile to add license or insurance details. Confirm licensing directly with your state or local board before hiring.

How recent is JEFF CASTO CONSTRUCTION's work?

The most recent permit on record for JEFF CASTO CONSTRUCTION is dated 2026-02-03, with 11 permits on file in total.

Marin County, CA

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JEFF CASTO CONSTRUCTION

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Permit records

Median project value

$3,000

Most recent job

2026-02-03

Is JEFF CASTO CONSTRUCTION legit?

What the public permit record shows, not self-reported reviews.

Is JEFF CASTO CONSTRUCTION a real contractor?: JEFF CASTO CONSTRUCTION appears in public building-permit records with 11 permits filed through 2026 in and around Marin County, CA. Permits are filed with local government before work begins, so this is a matter of public record, not a self-reported listing.
How is JEFF CASTO CONSTRUCTION's track record verified?: Every figure on this page comes from building permits pulled from municipal records and matched to JEFF CASTO CONSTRUCTION by the contractor name on each permit. Permit records cannot be purchased or faked the way online reviews can, which makes them a stronger signal of real, completed work.
Is JEFF CASTO CONSTRUCTION licensed and insured?: This profile is built from permit records, which confirm permitted work but do not include license status. JEFF CASTO CONSTRUCTION has not claimed this profile to add license or insurance details. Confirm licensing directly with your state or local board before hiring.
How recent is JEFF CASTO CONSTRUCTION's work?: The most recent permit on record for JEFF CASTO CONSTRUCTION is dated 2026-02-03, with 11 permits on file in total.

Recent permitted projects

otherMarin County · 2026$5,500
Replace existing 200 AMP Main Meter Panel with a new 200 Amp Main Meter panel. Replace like for like as existing panel is failing.Marin County · 2025$2,500
Replace existing 100 AMP Main Meter electrical panel with a 200 AMP main meter panel.Marin County · 2025$3,500
Replace existing 200 Amp single meter main panel with new 400 Amp 2 Meter Panel for 25 Acorn way and 25 A Acorn Way. Main house to be 225 Amps and ADU unit A will have 125 Amp service. PG and E has been contacted.Marin County · 2022$3,000
Replace a 100 Amp Zinzco sub-panel in a closet with a new 100 Amp Sub-panel. New sub-panel will face into the living room rather than the closet, it shall have a 100 Amp disconnect and all 15Amp and 20 Amp breakers shall be of type ARC Fault/GFI.Marin County · 2022$1,500
ATTENTION!! This main panel should be replaced ASAP!! It is a 100 AMP underground service with a meter. Damage to bus bar was detected. Panel location to remain the same and no additional load will be added. New panel will be 125 AMP underground fed. 2 new ground rods shall be added. Please call me (Jeff Casto) at (415)250-0026. Thank you!Marin County · 2022

Area served

Marin County

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Track record sourced from public building-permit records. Figures reflect permitted projects, not self-reported work. Listed on Proven Pros.