Tre Development LLC
ADU builder based in Los Angeles. Licensed since 2021.
- License active
- Workers' comp on file
19 jobs on Los Angeles permits, 2023 to 2026: 11 ADUs, 5 remodels, 3 home additions. 29th 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 1075573, 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 2021 | |
| Jobs on record | 19 jobs on Los Angeles permits, 2023 to 2026: 11 ADUs, 5 remodels, 3 home additions29th 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 1075573 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 $100,000 (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
1 job in the last 12 months, down from 8 the year before
Where they work most
- 9000710 jobs
- 900189 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 |
|---|---|---|---|
| Feb 14, 2026 | Addition(ePlan) THIRD AND FOURTH FLOOR ADDITION TO EXISTING SINGLE FAMILY DWEL | 90018 | $650,000 |
| Mar 26, 2025 | ADUConvert existing attached garage to accessory dwelling unit | 90007 | not stated |
| Mar 26, 2025 | ADUConvert existing attached garages to accessory dwelling unit | 90007 | not stated |
| Feb 13, 2025 | ADUConvert (e) irr.-shape attached garage to accessory dwelling u | 90007 | $100,000 |
| Feb 13, 2025 | ADUConvert (e) attached garage to accessory dwelling unit per gcs 65852.2 | 90018 | $100,000 |
| Feb 13, 2025 | ADUConvert (e) attached garage to accessory dwelling unit per gcs 65852 | 90018 | $100,000 |
| Jan 9, 2025 | ADUConvert existing garage/ recycle room to adu (896 sf) per ca g | 90007 | $102,000 |
| Jan 9, 2025 | ADUConvert existing garage/ recreation room to adu (1126 sf) per | 90007 | $102,000 |
| Nov 1, 2024 | AdditionAddition to existing duplex to have a new duplex with attached garage | 90007 | $466,721 |
| Sep 17, 2024 | AdditionProposed addition and remodel to create a 4-story duplex | 90007 | $1,282,382 |
| Sep 10, 2024 | ADUConvert existing garaage to ADU building C | 90007 | $68,000 |
| Jul 9, 2024 | ADUConvert proposed attach garage to attached ADU per CA Govt | 90007 | $40,000 |
| Jul 5, 2024 | RemodelRemodel (e) kitchen on the first floor and add a water bar on the second and third floor of units… | 90018 | $11,000 |
| Jul 5, 2024 | RemodelRemodel kitchens at first floor for each unit, add a wetbar at second floor to each unit, and add… | 90018 | $10,000 |
| Jul 3, 2024 | ADUConvert (E) four car attached garage to one story Accessory Dwelling | 90018 | $44,000 |
| May 21, 2024 | RemodelRemodel existing duplex by enlarging the kitchens and adding wet bars.(Existing duplex per… | 90018 | $12,000 |
| Apr 29, 2024 | ADUCONVERTING 3 ATTACHED GARAGE TO ADU, PC Staff to create add ap | 90018 | $68,000 |
| Oct 10, 2023 | RemodelSupplemental permit to 22014-10000-04119 to revise work description proposed addition and remodel… | 90007 | $70,000 |
| Jun 2, 2023 | Remodel(ePlan) THIRD AND FOURTH FLOOR ADDITION TO EXISTING SINGLE FAMILY DWELLING. SCOPE WILL ALSO CONSIST… | 90018 | $650,000 |
What to ask before you hire
About Tre Development LLC
- 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?
Get a quote from Tre Development LLC
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