Alpha Structural Inc
Seismic retrofit contractor based in Sunland. Licensed since 1993.
- License active
- Workers' comp on file
105 jobs on Los Angeles permits, 2023 to 2026: 87 seismic retrofits, 13 remodels, 3 home additions, 1 pool or spa, 1 ADU. The 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 663409, active in the state's records on Sep 23, 2026General engineering, general building, concreteNo 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 1993 | |
| Jobs on record | 105 jobs on Los Angeles permits, 2023 to 2026: 87 seismic retrofits, 13 remodels, 3 home additions, 1 pool or spa, 1 ADUThey are based in Sunland. Work outside Los Angeles is not in these records.The 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 663409 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 $10,000 (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
28 jobs in the last 12 months, up from 24 the year before
Where they work most
- 900659 jobs
- 900269 jobs
- 900346 jobs
- 900395 jobs
- 900424 jobs
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 |
|---|---|---|---|
| Sep 4, 2026 | Seismic retrofitPartial Seismic Retrofit and Anchor to (E) Foundation Per Standard Plan #1 and Partial Sister… | 90018 | $14,000 |
| Aug 25, 2026 | Seismic retrofitVoluntary foundation retrofit to add sill plate anchor bolts and plywood to cripple walls per LA… | 90042 | $4,500 |
| Jun 25, 2026 | Seismic retrofit[ePlan]1. UNDERPINNING OF (E) 2-STORY SFD WITH PILES AND GRADE BEAM. (43'-0" LINEAR FEET)2. SEISMIC… | 90065 | $24,000 |
| Jun 11, 2026 | RemodelAddition and remodel to (e) 2-story sfd w/ attached garage | 90402 | $277,600 |
| Jun 11, 2026 | RemodelTemp shoring for addition and remodel to (e) 2-story sfd w/ attached garage & rec room | 90402 | $28,300 |
| Jun 11, 2026 | RemodelGrading for new addition and remodel to (e) 2-story sfd w/ attached garage& rec room, and site… | 90402 | not stated |
| May 4, 2026 | Seismic retrofitSeismic retrofit per ladbs standard plan and underpinning pads per engineer's details | 90046 | $20,000 |
| Apr 30, 2026 | Seismic retrofitSEISMIC RETROFIT PER ENGINEER DESIGN AND LADBS STANDARD PLAN #1 TO EXISTING SINGLE FAMILY DEWLLING… | 90065 | $4,300 |
| Apr 22, 2026 | Seismic retrofitSoft story retrofit per lamc div 93 install new (1) steel smf and grade beam on east building line | 90292 | $25,000 |
| Apr 13, 2026 | Seismic retrofitPartial seismic retrofit of existing foundation system per eng design | 90007 | $4,950 |
| Apr 8, 2026 | Seismic retrofitSoft story retrofit per div 93 install 2 sccs | 90068 | $40,000 |
| Mar 23, 2026 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: Verification of proposed work done under ADU… | 90066 | not stated |
| Feb 26, 2026 | Seismic retrofitSoft story retrofit per div 93. install new sccs | 90026 | $20,000 |
| Jan 21, 2026 | Seismic retrofitSeismic retrofit including 4 pads for underpinning for (e) 2-story SFD w/ attached garage | 91356 | $5,000 |
| Jan 14, 2026 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: SCOPE OF WORK: MANDATORY SOFT STORY RETROFIT USING… | 90027 | $40,000 |
| Jan 12, 2026 | Seismic retrofitSeismic retrofit per ladbs standard plan #1 and engr design on (e) 4 unit apartment | 90019 | $13,000 |
| Jan 12, 2026 | Seismic retrofit | 90035 | $4,300 |
| Jan 6, 2026 | Seismic retrofitVoluntary seismic retrofit- partial foundation bolting and bracing per engineered design | 90291 | $7,600 |
| Dec 22, 2025 | Seismic retrofitRetrofit per ladbs standard plan # 1, underpinning using pad footing and new post & piers per… | 90024 | $22,000 |
| Dec 4, 2025 | Seismic retrofitSeismic retrofit per engineered details for an existing apartment | 90026 | $4,300 |
| Dec 1, 2025 | Seismic retrofitVoluntary foundation seismic retrofit per standard plan and engineered detail | 90026 | $9,500 |
| Nov 25, 2025 | Seismic retrofitSeismic retrofit ladbs standard plan #1 detail 7post and pier placement of 33 piers | 90065 | $7,500 |
| Nov 14, 2025 | RemodelInterior and exterior remodel:interior: (1) opening and remove (2) bearing walls.exterior: (2) new… | 91342 | $7,000 |
| Oct 21, 2025 | Seismic retrofitConcrete spall repair and seismic retrofitting of the perimeter basement per labc standard plan #1… | 90004 | $5,000 |
| Oct 20, 2025 | RemodelStructural remodel of an (e) Duplex, Adding a (n) structural floor beam and new plywood flooring | 90044 | $10,000 |
| Sep 29, 2025 | Seismic retrofitRemedial structural retrofitrepair of (e) shear wall in common area of complexno chang in use or sf | 91403 | $4,000 |
| Sep 25, 2025 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: Install Special Steel Cantilever Column and… | 90034 | $25,000 |
| Sep 19, 2025 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: Install Special Steel Cantilever Columns | 90034 | $60,000 |
| Sep 10, 2025 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: SOFT STORY RETROFIT PER LABC CHAPTER 93 USING… | 90034 | $70,000 |
| Sep 10, 2025 | Seismic retrofitSoft-Story seismic retrofit per LABC Chapter 93: SOFT STORY RETROFIT PER LABC CHAPTER 93 USING… | 90034 | $70,000 |
| Sep 2, 2025 | AdditionEnlarge current attached one car garage to (N) two car garage by | 90046 | $50,000 |
| Aug 7, 2025 | Seismic retrofitRemedial foundation underpinning seismic retrofit and 7 (post and piers) per engineer design in… | 90066 | $15,000 |
| Jul 1, 2025 | Seismic retrofitSeismic retrofit per ladbs standard plan figure #7 all work to be interior only | 90293 | $6,000 |
| Apr 22, 2025 | Seismic retrofitEngineered voluntary seismic retrofit | 90026 | $9,635 |
| Apr 7, 2025 | Seismic retrofitNo details on the permit | 90026 | $20,000 |
| Apr 1, 2025 | Seismic retrofitRemedial structural retrofit | 90026 | $8,300 |
| Mar 26, 2025 | Seismic retrofitSoft story seismic retrofit as per div 93. install grade beams and special cantilever column system | 90018 | $40,000 |
| Mar 25, 2025 | Seismic retrofitSeismic retrofit to existing church | 90041 | $7,000 |
| Feb 11, 2025 | Seismic retrofitSoft story retrofit as per labc ch.93 install 4 new cantilever columns and grade beams | 90026 | $60,000 |
| Feb 4, 2025 | Seismic retrofitVoluntary foundation retrofit to existing single family dwelling | 91403 | $5,662 |
What to ask before you hire
About Alpha Structural 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 Alpha Structural Inc
Five quick questions. We pass your request to Alpha Structural Inc.
Request for Alpha Structural Inc
- Where
- Job
- Start
- Budget
- Goes to
You decide who to hire. Your details go only to the contractors you pick. How we use your details
Sent. We have your request.
We pass it to Alpha Structural 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 roomMore seismic retrofit contractors near 90065 and 90026
- Sturdy Builds Inc
- American Retrofitters Corp
- Golden Retrofit
- Titan Contracting Services Inc
- Optimum Seismic Inc
- Shaolian Sol K and Assoc Inc
See all 80 seismic retrofit contractors in Los Angeles, ranked by jobs
Run this business? Claim this page to get requests by email and reply to homeowners here.