Wong Construction Inc
Seismic retrofit contractor based in Millbrae. Licensed since 1979.
- License active
- Workers' comp on file
16 jobs on San Francisco permits, 2021 to 2025: 8 seismic retrofits, 4 panel upgrades, 3 remodels, 1 home addition. 10th most retrofit permits of 42 contractors in San Francisco.
What the public records show
From the state's license records and the city's permits, one question at a time.
| Question | Records show | Mark |
|---|---|---|
| Licensed? | License 377610, active in the state's records on Sep 23, 2026General buildingNo 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 1979 | |
| Jobs on record | 16 jobs on San Francisco permits, 2021 to 2025: 8 seismic retrofits, 4 panel upgrades, 3 remodels, 1 home additionThey are based in Millbrae. Work outside San Francisco is not in these records.10th most retrofit permits of 42 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
Last checked Oct 4, 2026. This may have changed. Check it on CSLB.
No complaints or citations on the board's public record.
Source: California Contractors State License Board, checked Oct 4, 2026. Look up license 377610 on CSLB
Cost and timing
All retrofit jobs in San Francisco: $25,000 to $100,000
Half of 704 city permits list an amount in this range. Permit amounts are often lower than what you pay.
How to read this range
Contractors write a job value on the permit form, and the city uses it to set the permit fee. It is not the contract price, and it is often lower than what you pay. A quarter of the permits list less than this range, and a quarter list more. Use it to see if a quote is in the normal range.
Permit value (not a price)
Their typical permit lists $80,000 (half list more, half less)
That is the figure written on the permit form, which can be far from what you pay. What retrofit jobs cost in San Francisco.
Get 2 or 3 written quotes.
Permit timeline
Across San Francisco, a retrofit permit stays open about about 8 months, 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. Waiting for the permit adds about 16 days. How long retrofit jobs take.
Track record
Jobs per quarter
Where they work most
- 941337 jobs
- 941212 jobs
- 941161 job
- 941031 job
- 941151 job
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.
| Date | Work | ZIP | On the permit form |
|---|---|---|---|
| Aug 5, 2025 | AdditionNo details on the permit | 94116 | $98,000 |
| Mar 25, 2025 | RemodelIn-kind remodeling of 1 kitchen(s) in 2nd fl and in-kind remodeling of 1 bathroom(s) in 2nd fl with… | 94121 | $38,000 |
| Aug 26, 2024 | Seismic retrofitResidential - soft story retrofit per sfebc chapter 4d engineering criteria 2016 cebc appendix a-4.… | 94103 | $10,000 |
| Jun 8, 2023 | Seismic retrofitSeismic retrofit of soft story comply with sfebc 4d | 94121 | $100,000 |
| Jan 20, 2023 | RemodelUnit #2: remodel kithchen and bathroom, removal of some interior walls reinforce floor due to… | 94133 | $60,000 |
| Jan 20, 2023 | Panel upgradeUnit 2: add bedroom, kitchen & bathroom remodel, new subpanel, new plugs, lights, switches | 94133 | not stated |
| Jan 13, 2023 | Seismic retrofitResidential only soft story retrofit per sfebc chapter 4d engineering criteria 2016 cebc appendix… | 94115 | $60,000 |
| Aug 30, 2022 | Seismic retrofitResidential soft story retrofit per sfebc chapter 4d engineering criteria 2016 cebc appendix a-4.… | 94109 | $80,000 |
| Jul 22, 2022 | Panel upgradeNew 200a subpanel, lights, receptacles, washe/dryer | 94127 | not stated |
| Jan 7, 2022 | Seismic retrofitResidential: soft story retrofit per sfebc chapter 4d: 2016 cebc appendix a-4 | 94123 | $80,000 |
| Dec 21, 2021 | Seismic retrofitVoluntary seismic strengthening in the front of the building | 94133 | $100,000 |
| Dec 3, 2021 | Seismic retrofitSeismic retrofit of soft story comply w/ sffc 4d mondatory seismic retrofit per 2016 cebc appendex… | 94122 | not stated |
| Oct 15, 2021 | Seismic retrofitWork to be performed in unit 3, 566 lombard and unit 5, 570 lombard demolition, remodel and rebuild… | 94133 | $120,000 |
| Oct 15, 2021 | RemodelWork to be performed in unit 3, 566 lombard and unit 5, 570 lombard demolition, remodel and rebuild… | 94133 | $120,000 |
| Oct 15, 2021 | Panel upgrade (×2, same day)Apt 3: remodel bedrooms, bathroom, kitchen new subpanel, new plugs, lights switches | 94133 | not stated |
What to ask before you hire
About Wong Construction Inc
- Ask what the warranty covers and for how long, in writing.
Worth asking any seismic retrofit contractor
- Can you show me proof of liability insurance and your bond?
- Is the plan engineered, or does it follow the city's standard plan?
- How many anchor bolts and wall panels will you install, and where?
- Who pulls the permit, and who meets the inspector?
Get a quote from Wong Construction Inc
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Open your job roomMore seismic retrofit contractors near 94133 and 94121
- Seismic Retrofitters Inc.
- Sft Construction Corp
- Mulhall Construction Inc.
- Rei Build Up Construction Corp
- Warner Custom Homes Inc.
- West Coast Premier Construction Inc
See all 42 seismic retrofit contractors in San Francisco, ranked by jobs
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