Ariel Muller
Seismic retrofit contractor based in Los Angeles. Licensed since 2017.
- License active
- Workers' comp on file
20 jobs on Los Angeles permits, 2023 to 2026: 16 seismic retrofits, 2 ADUs, 1 remodel, 1 home addition. 15th most retrofit permits of 80 contractors in Los Angeles.
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 1026822, 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 2017 | |
| Jobs on record | 20 jobs on Los Angeles permits, 2023 to 2026: 16 seismic retrofits, 2 ADUs, 1 remodel, 1 home addition15th most retrofit permits of 80 licensed contractors in Los Angeles. That counts jobs, not quality.Our Los Angeles permit records cover June 2023 to September 2026. |
Records: the state license board and City of Los Angeles 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 1026822 on CSLB
Cost and timing
All retrofit jobs in Los Angeles: $20,000 to $60,000
Half of 1,205 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 $30,000 (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 Los Angeles.
Get 2 or 3 written quotes.
Permit timeline
Across Los Angeles, a retrofit permit stays open about about 6 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 about 4 months. How long retrofit jobs take.
Track record
6 jobs in the last 12 months, up from 3 the year before
Where they work most
- 913434 jobs
- 907312 jobs
- 900352 jobs
- 900202 jobs
- 914061 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 15, 2026 | RemodelRemodel and addition to single family dwelling | 91406 | $50,000 |
| Jun 12, 2026 | Seismic retrofitSoft story retrofit per labc chapter 93. install steel moment frame | 90731 | $60,000 |
| Nov 18, 2025 | Seismic retrofitSoft story retrofit as per labc ch 93. install onenew shear wall | 91343 | $30,000 |
| Nov 18, 2025 | Seismic retrofitSoft story retrofit as per labc ch 93. install shear wall | 91343 | $30,000 |
| Nov 18, 2025 | Seismic retrofitSoft story retrofit unit as per labc ch | 91343 | $20,000 |
| Nov 18, 2025 | Seismic retrofitSoft story retrofit as per labc chapter 93 install one new shear wall | 91343 | $20,000 |
| Jul 18, 2025 | ADUConverting an Existing Bedroom into a new Attached ADU and Remo | 90043 | $50,000 |
| Feb 20, 2025 | AdditionRear Addition to (E) SFD. All work per engineered plans | 90045 | $35,000 |
| Oct 22, 2024 | Seismic retrofit | 90069 | $25,000 |
| Jun 2, 2024 | Seismic retrofit | 90035 | $50,000 |
| May 9, 2024 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: Install (3) new ordinary moment frames (OMFs) | 90731 | $90,000 |
| Apr 25, 2024 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: Supplemental to 22016-10000-26668 for framing… | 90020 | $1,000 |
| Apr 1, 2024 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: (N) SCCS | 90006 | $30,000 |
| Apr 1, 2024 | Seismic retrofit | 90035 | $50,000 |
| Feb 7, 2024 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: Install 2 new special steel cantilevered columns… | 90019 | $40,000 |
| Dec 22, 2023 | ADUConvert (e) 19'9" x 24'1" detached garage to accessory dwelling | 90018 | $60,000 |
| Dec 7, 2023 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: Supplemental to 22016-10000-38401 to revise plans… | 90008 | not stated |
| Nov 21, 2023 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: Install (2) new Steel Special Cantilever Columns… | 90020 | $60,000 |
| Sep 26, 2023 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: Add (1) new OMF in tuck under parking area | 90004 | $30,000 |
| Aug 18, 2023 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: 1 (N) SCCS | 90291 | $20,000 |
What to ask before you hire
About Ariel Muller
- 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 Ariel Muller
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Open your job roomMore seismic retrofit contractors near 91343 and 90731
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See all 80 seismic retrofit contractors in Los Angeles, ranked by jobs
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