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Cornerstone Select Builders Inc

Panel upgrade electrician based in Livermore. Licensed since 2007.

  • License active
  • Workers' comp on file

53 jobs on San Francisco permits, 2021 to 2025: 51 panel upgrades, 2 remodels. 60th most panel upgrade permits of 1,063 contractors in San Francisco.

Get a quote from Cornerstone Select Builders IncCall (925) 495-4333Check license 888881

What the public records show

From the state's license records and the city's permits, one question at a time.

QuestionRecords showMark
Licensed?License 888881, active in the state's records on Sep 23, 2026General building, drywallNo complaints or citations on the board's public record.Checks out
Workers' comp?Workers' comp policy on file with the stateThis covers their crew if someone is hurt. It is not insurance for your home.On file
In business?Licensed since 2007
Jobs on record53 jobs on San Francisco permits, 2021 to 2025: 51 panel upgrades, 2 remodelsThey are based in Livermore. Work outside San Francisco is not in these records.60th most panel upgrade permits of 1,063 licensed contractors in San Francisco. That counts jobs, not quality.Our San Francisco permit records cover September 2021 to September 2026.

Records: the state license board and City of San Francisco permits.

State license board record

No complaints or citations on the board's public record.

Source: California Contractors State License Board, checked Oct 4, 2026. Look up license 888881 on CSLB

Cost and timing

Permit timeline

Across San Francisco, a panel upgrade permit stays open about 77 days, from permit to final inspection

This is not how long the crew works at your home: most of it is waiting for the inspection. Ask them how many days the work takes. The permit itself is usually issued the same day. How long panel upgrade jobs take.

Track record

0 jobs in the last 12 months, down from 24 the year before

Q4 2021: 2 jobsQ2 2024: 17 jobsQ3 2024: 10 jobsQ4 2024: 7 jobsQ1 2025: 10 jobsQ2 2025: 6 jobsQ3 2025: 1 jobBusiest: 17 jobs2022202320242025
Each bar is 3 months of permits. The tallest is 17 jobs, April to June 2024. Across San Francisco, all contractors together had 21% fewer panel upgrade jobs in the last 12 months than in the 12 months before.

Where they work most

  • 9410753 jobs

Jobs by kind of work

Latest jobs

Permit values are what the contractor wrote on the permit form, not what the owner paid.

A row marked ×2 or more stands for that many similar jobs on one day in one ZIP code.

DateWorkZIPOn the permit form
Jul 8, 2025Panel upgradeUnit # 4803 - subpanel 125 upgrade94107not stated
Jun 4, 2025Panel upgradePa # 2018-0625-2836 . subpanel 125 upgrade 10-20 outlets unit 230394107not stated
Jun 4, 2025Panel upgradePa# 2018-0625-2836. subpanel 125 upgrade 10-20 outlets94107not stated
May 13, 2025Panel upgrade (×2, same day)Unit #3807 sub panel 125 upgrade, 10-20 outlets94107not stated
Apr 22, 2025Panel upgradeUnit #1602: sub panel 125 upgrade (10-20 outlets). ref 2018-0625-2836 per unit94107not stated
Apr 22, 2025Panel upgradeUnit #2709: sub panel 125 upgrade94107not stated
Mar 26, 2025Panel upgrade (×2, same day)Unit 2807: sub panel 125 upgrade94107not stated
Mar 13, 2025Panel upgrade (×2, same day)Apt #2204: subpanel 125 upgrade, 10-20 outlets94107not stated
Mar 10, 2025Panel upgradeUnit #1203: subpanel 125 amp upgrade, 10-20 outlets94107not stated
Feb 14, 2025Panel upgradeUnit 1707: subpanel 125 amp ugrade, 10-20 outlets94107not stated
Jan 31, 2025Panel upgradeUnit 1102: subpanel 125 amp ugrade, 10-20 outlets94107not stated
Jan 15, 2025Panel upgrade (×2, same day)Subpanel 125 amp ugrade, 10-20 outlets94107not stated
Jan 7, 2025Panel upgradeUnit # 4204: sub panel 125 upgrade 10-20 outlets94107not stated
Dec 6, 2024Panel upgradeUnit #3609. subpanel 125 amp upgrade, 10-20 outlets, ref to pa# 20180625283694107not stated
Nov 21, 2024Panel upgrade (×2, same day)Unit #2209: sub panel 125 upgrade 10-20 outlets94107not stated
Oct 23, 2024Panel upgrade (×2, same day)Unit # 4705 subpanel 125 upgrade94107not stated
Oct 11, 2024Panel upgradeUnit #2707: subpanel 125 upgrade, 10-20 outlets94107not stated
Oct 11, 2024Panel upgradeUnit #3903: subpanel 125 upgrade94107not stated
Sep 18, 2024Panel upgrade (×2, same day)Subpanel 125amp, upgrade 10-20 outlets per unit94107not stated
Aug 23, 2024Panel upgrade (×2, same day)Amendment to e202407015327- change of unit from 6123 to unit 2407 for subpanel upgrade94107not stated
Jul 1, 2024Panel upgradeReference 201806252836 administrative permit to correct e202405074233 unit 3306-subpanel ugrade to…94107not stated
Jul 1, 2024Panel upgradeReference 201806252836 administrative permit e202405074230 to correct unit 1605-subpanel ugrade to…94107not stated
Jul 1, 2024Panel upgradeUnit 5406. subpanel upgrade94107not stated
Jul 1, 2024Panel upgradeUnit #6120: sub panel upgrade94107not stated
Jul 1, 2024Panel upgradeUnit 6123. subpanel upgrade94107not stated
Jul 1, 2024Panel upgradeUnit #3203: sub panel upgrade94107not stated
Jun 25, 2024Panel upgradeUnit 5406- upgrade sub panel94107not stated
Jun 25, 2024Panel upgradeUnit 4404- upgrade subpanel94107not stated
Jun 7, 2024Panel upgrade (×2, same day)Unit 3504 subpanel 125 upgrade, 10-20 outlets94107not stated each
May 28, 2024Panel upgradeUnit 2101 subpanel upgrade, 10-20 outlets ref 20180625283694107not stated
May 28, 2024Panel upgrade (×2, same day)Unit 4606 subpanel upgrade, 10-20 outlets94107not stated each
May 7, 2024Panel upgradeRef 201806252836- subpanel upgrade for unit 240694107not stated
May 7, 2024Panel upgrade (×3, same day)94107not stated
May 7, 2024Panel upgradeRef 201806252836-unit3306- subpanel upgrade94107not stated
Apr 2, 2024Panel upgradeRef 201806252836- unit 01-1605- replace new subpanel and circuit94107not stated
Apr 2, 2024Panel upgradeRef 201806252836- replace subpanel and circuit94107not stated
Apr 2, 2024Panel upgradeRef 201806252836- unit 04-4304- electrical for new subpanel and circuit94107not stated
Apr 2, 2024Panel upgradeRef 201806252836- unit 03-3907- electrical work for new subpanel and circuit94107not stated
Apr 2, 2024Panel upgradeRef 201806252836- unit 05-5303-electrical work for new subpanel and circuit94107not stated
Oct 6, 2021RemodelRemodel existing meter room per p&e requirement refer pa 20140910602194107$15,000

What to ask before you hire

About Cornerstone Select Builders Inc

  • Ask what the warranty covers and for how long, in writing.

Worth asking any panel upgrade electrician

  • Can you show me proof of liability insurance and your bond?
  • What size panel, and does the utility need to change the service to my house?
  • Who arranges the power shutoff with the utility?
  • Who pulls the permit, and who meets the inspector?

Get a quote from Cornerstone Select Builders Inc

Five quick questions. We pass your request to Cornerstone Select Builders Inc.

You decide who to hire. Your details go only to the contractors you pick. How we use your details

1. Where is the job?

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2. What do you need?

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3. When do you want to start?
4. What is your rough budget?

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5. Where should we send it?

Your contact details go only to who you pick here.

Sent. We have your request.

We pass it to Cornerstone Select Builders Inc. Replies usually come within a few days.

Your job room keeps the request, your photos and every reply in one place, with an assistant that checks prices against city permits. Keep its link: it is the key to your job.

Open your job room

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