C S W F Construction Inc
ADU builder based in La Puente. Licensed since 2016.
- License active
- Workers' comp on file
48 jobs on Los Angeles permits, 2023 to 2026: 38 ADUs, 6 remodels, 2 solar installations, 1 home addition, 1 roofing job. 2nd most ADU permits of 271 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 1021458, 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 2016 | |
| Jobs on record | 48 jobs on Los Angeles permits, 2023 to 2026: 38 ADUs, 6 remodels, 2 solar installations, 1 home addition, 1 roofing jobThey are based in La Puente. Work outside Los Angeles is not in these records.2nd most ADU permits of 271 licensed contractors in Los Angeles. That counts jobs, not quality.Our Los Angeles permit records cover September 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 1021458 on CSLB
Cost and timing
All ADU jobs in Los Angeles: $35,000 to $120,000
Half of 9,338 city permits list an amount in this range. Permit amounts are often lower than what you pay.
- Detached ADUs in Los Angeles: $46,000 to $121,000 (3,485 permits)
- Garage conversions in Los Angeles: $30,000 to $65,000 (3,524 permits)
- Junior ADUs in Los Angeles: $20,000 to $50,000 (768 permits)
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 $285,000 (half list more, half less)
That is the figure written on the permit form, which can be far from what you pay. What ADU jobs cost in Los Angeles.
Get 2 or 3 written quotes.
Permit timeline
Across Los Angeles, a ADU permit stays open about about 12 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 ADU jobs take.
Track record
22 jobs in the last 12 months, up from 16 the year before
Where they work most
- 9001610 jobs
- 900199 jobs
- 900373 jobs
- 900613 jobs
- 900073 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 11, 2026 | ADU2-unit ADUs w/ carport per GCS 65852.2(e)(1)(D) AND LAMC 12.22 A.33(c) | 90019 | $350,000 |
| Sep 11, 2026 | ADUNew 2-Story Detached ADU per LAMC 12.22 A.33(c) and (d), NFPA 13D-Fire | 90006 | $110,000 |
| Aug 26, 2026 | ADUNew 3-story sfd and adu (per state law) in front | 90016 | $300,000 |
| Aug 22, 2026 | ADUNew 2-story (2) ADUs w./ att | 90019 | $300,000 |
| Jun 25, 2026 | ADU3-story Duplex + Attached ADU Per LAMC 12.22 A.33(c) AND (e) *** 1 | 90016 | $570,000 |
| Jun 25, 2026 | ADU2-story detached ADU Per State law 66323(a)(4) | 90016 | $190,000 |
| Jun 18, 2026 | Solar, 6 kWNew 3-story 3-unit apartment (rear of lot).nfpa 13r.solar installation required to meet 6kw per… | 90037 | $667,000 |
| Jun 18, 2026 | Solar, 6 kWNEW 3-STORY DUPLEX WITH ATTACHED ADU PER 12.22 A33 (c)-(d) (FRONT OF LOT)NFPA 13DSOLAR… | 90037 | $667,000 |
| Apr 5, 2026 | ADUNew 3-story S.F.D. with attached ADU (per LAMC 12.22 A.33 (c) and (e)) | 90029 | $320,000 |
| Mar 27, 2026 | ADUNew 3-story SFD w/ attached ADU per LAMC 12.22 A.33(c) and (e) at rear | 90038 | $400,000 |
| Mar 20, 2026 | ADUNew 2-story detached (2) ADUs at rear of the lot per state law (CA Gov | 90037 | $110,000 |
| Mar 3, 2026 | ADUREAR 3 STORY SFD AND ADU (ADU PER LAMC 12.22 A.33(c) & (e)) ---2 OF 2 | 90016 | $265,000 |
| Feb 27, 2026 | ADUConvert (E) Accessory Dwelling Unit in rear of lot into two Accessory | 90019 | $10,000 |
| Feb 24, 2026 | RemodelSupplemental permit to 25014-30000-01533 to change scope of work from addition & remodel to new… | 90061 | $10,000 |
| Jan 14, 2026 | ADUNew 3-story sf SFD w/ attached ADU and carport **3 of 3** ** ADU Per | 90016 | $300,000 |
| Jan 9, 2026 | ADUNew detached 2-story ADU (1861 sf ) ; (5-bedroom ; 5-bathroom) per GCS | 90035 | $200,000 |
| Dec 18, 2025 | ADUNew 4-story S.F.D. (2,683 sf) w/ attached ADU (3,040 sf) per LAMC 12.2 | 90007 | $600,000 |
| Nov 16, 2025 | ADUNEW 3-STORY SFD WITH ATTACHED ADU ON GROUND FLOOR PER GCS 65852.2(e)(1 | 90046 | $250,000 |
| Nov 10, 2025 | Addition17'-4" x 8'-0" addition and convert existing 20'-4" x 20'-2" detached | 90043 | $45,000 |
| Sep 26, 2025 | ADUNew 2-story 2 ADUs at rear of the lot per CA Govt | 90016 | $280,000 |
| Sep 25, 2025 | ADUNew 4-story SFD (5,938 sf) w./ att | 90007 | $952,200 |
| Sep 25, 2025 | ADUNew 2 Story 2-ADUs per state law at rear of the lot *** 2 of 2*** | 90018 | $280,000 |
| Sep 12, 2025 | RemodelAddition and major remodel to leave 7'-0" of foundation to convert (E) 1-story single family… | 90061 | $260,000 |
| Aug 27, 2025 | ADUNEW 3-STORY DUPLEX WITH ATTACHED ADU PER CA Govt | 90026 | $400,000 |
| Aug 22, 2025 | ADUNew 3-story SFD w./ att | 90034 | $290,000 |
| Aug 21, 2025 | ADUNew 2-story ADU at rear of the lot per CA Govt | 90019 | $170,000 |
| Aug 18, 2025 | RemodelNo details on the permit | 90019 | $10,000 |
| Aug 5, 2025 | ADUNew 3-story duplex w./ att | 91601 | $500,000 |
| Jul 14, 2025 | ADU4 STORY SFD AND ADU PER LAMC 12.22 A.33(c) and (e) IN REAR. ** see co | 90007 | $570,000 |
| May 23, 2025 | ADU(N) 41' X 35'-7" (2) ACCESSORY DWELLING UNITS PER GCS 65852.2(e)(1)(D) | 90019 | $220,000 |
| Apr 13, 2025 | ADUNew 3-story sfr with attached adu at rear of lot | 90038 | $297,000 |
| Mar 9, 2025 | ADUNEW 2-STORY ADU (1,200 SF max per Ordinance, LAMC 12.22 A.33 (c)-(d)) | 90033 | $100,000 |
| Jan 29, 2025 | ADUNew detached 1 story ADU per LAMC 12.22 A.33(c) and (d) and WFPP | 90061 | $95,000 |
| Jan 17, 2025 | ADU, 1200 sq ftNEW 2-STORY (30'-0"x20'-0"), 1200 SQFT DETACHED ADU W/NFPA 13D SPRINKL | 91601 | $164,000 |
| Jan 16, 2025 | ADUNew 3-story S.F.D. with attached ADU and carport in rear of the lot | 90016 | $300,000 |
| Nov 13, 2024 | RemodelInterior Remodel of existing unit 402 to create 3rd bedroom | 90025 | $50,000 |
| Nov 8, 2024 | ADUNew 3-story sfd with 4-car parking on the ground floor and an adu on | 90029 | $307,737 |
| Nov 7, 2024 | RemodelInterior Remodel of existing unit 403 to create 3rd bedroom | 90025 | $50,000 |
| Sep 16, 2024 | ADU**front building** convert existing garages to accessory dwelling unit | 90019 | $40,000 |
| Sep 6, 2024 | ADU(N) TWO STORY ADU 1,196 SF.LAMC 12.22 A.33 (c)-(d) | 90019 | $125,580 |
What to ask before you hire
About C S W F Construction Inc
- Ask what the warranty covers and for how long, in writing.
Worth asking any ADU builder
- Can you show me proof of liability insurance and your bond?
- Do you handle the plans, engineering and utility hookups, or do I?
- How long from permit to the final inspection on your last three ADUs?
- What is the payment schedule, and what is extra?
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