Alex Builder Inc
Seismic retrofit contractor based in Millbrae. Licensed since 2009.
- License active
- Workers' comp on file
7 jobs on San Francisco permits, 2021 to 2025: 3 seismic retrofits, 2 remodels, 1 panel upgrade, 1 heat pump installation. 26th 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 928753, 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 2009 | |
| Jobs on record | 7 jobs on San Francisco permits, 2021 to 2025: 3 seismic retrofits, 2 remodels, 1 panel upgrade, 1 heat pump installationThey are based in Millbrae. Work outside San Francisco is not in these records.26th 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 928753 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 $120,000 (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
- 941313 jobs
- 941142 jobs
- 941221 job
- 941171 job
Jobs by kind of work
Latest jobs
Permit values are what the contractor wrote on the permit form, not what the owner paid.
| Date | Work | ZIP | On the permit form |
|---|---|---|---|
| Jun 13, 2025 | Panel upgradeBuild out ground floor | 94131 | not stated |
| Jun 13, 2025 | Heat pumpReplace heat pump in home | 94131 | not stated |
| Feb 14, 2025 | Remodel1st fl - convert (e) family rm area into 2 bedrm and 2 bathrms; new staircase to 2nd fl; infill… | 94122 | $70,000 |
| May 24, 2022 | Seismic retrofitSoft story retrofit (comply with nov 201992371) | 94114 | $60,000 |
| Nov 3, 2021 | RemodelInterior remodel and rear horizontal & vertical expansion, add a new dwelling unit | 94131 | $640,000 |
| Oct 7, 2021 | Seismic retrofitSeismic retrofit of soft story comply with sfebc 4d mandatory seismic retrofit per 2016 cebc… | 94114 | $130,000 |
| Oct 6, 2021 | Seismic retrofitSeismic retrofit of soft story comply with sfebc 4d mandatory seismic retrofit per 2016 cebc… | 94117 | $120,000 |
What to ask before you hire
About Alex Builder 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 Alex Builder Inc
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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 roomMore seismic retrofit contractors near 94131 and 94114
- Seismic Retrofitters Inc.
- Sft Construction Corp
- Rei Build Up Construction Corp
- Peace of Mind Structural Inc
- A J O Group Build Inc
- Arris Build Group, Inc.
See all 42 seismic retrofit contractors in San Francisco, ranked by jobs
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