J & J Custom Builders Inc
Remodeling contractor working in Marin County. Licensed since 2016.
- License active
- Workers' comp on file
7 jobs on Marin County permits, 2023 to 2025: 4 remodels, 2 home additions, 1 ADU. 74th most remodel permits of 143 contractors in Marin County.
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 1013823, 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 | 7 jobs on Marin County permits, 2023 to 2025: 4 remodels, 2 home additions, 1 ADUTheir permits mention 3 garages, 2 decks, 1 porch, 1 kitchen.74th most remodel permits of 143 licensed contractors in Marin County. That counts jobs, not quality.Our Marin County permit records cover October 2021 to September 2026. |
Records: the state license board and City of Marin County 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 1013823 on CSLB
Cost and timing
All remodel jobs in Marin County: $35,000 to $250,000
Half of 1,511 city permits list an amount in this range. Permit amounts are often lower than what you pay.
- Kitchen remodels in Marin County: $45,000 to $199,000 (439 permits)
- Bathroom remodels in Marin County: $25,000 to $145,000 (597 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 $347,500 (half list more, half less)
That is the figure written on the permit form, which can be far from what you pay. What remodel jobs cost in Marin County.
Get 2 or 3 written quotes.
Track record
Jobs per quarter
Where they work most
- 949045 jobs
- 949602 jobs
Jobs by kind of work
- Remodel
- Addition
- ADU
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 24, 2025 | RemodelADDITION REMODEL Remodel; Add 2nd Floor, Including A D U : Convert Part Of Garage : Decks | 94904 | $750,000 |
| Sep 24, 2025 | AdditionADDITION REMODEL Remodel; Add 2nd Floor, Including A D U : Convert Part Of Garage : Decks | 94904 | $750,000 |
| Mar 5, 2024 | RemodelADDITION REMODEL Remodel & Addition; Remove Column In Garage & Replace Center Beam | 94960 | $195,000 |
| Mar 5, 2024 | AdditionADDITION REMODEL Remodel & Addition; Remove Column In Garage & Replace Center Beam | 94960 | $195,000 |
| Jul 7, 2023 | RemodelREMODEL ADU Add 2nd Flr A D U; Remod (E) 1st Flr; Trellis; Deck; Covered Porches; Convert Part Of… | 94904 | $500,000 |
| Jul 7, 2023 | ADUREMODEL ADU Add 2nd Flr A D U; Remod (E) 1st Flr; Trellis; Deck; Covered Porches; Convert Part Of… | 94904 | $500,000 |
| Apr 7, 2023 | RemodelREMODEL Remodel: Kitchen & Bath Remodel - Express | 94904 | $126,000 |
What to ask before you hire
About J & J Custom Builders Inc
- Ask what the warranty covers and for how long, in writing.
Worth asking any remodeling contractor
- Can you show me proof of liability insurance and your bond?
- What is in the price, and how do you price changes once work starts?
- Who will run the job day to day, and who are the subcontractors?
- Who pulls the permits, and what is the payment schedule?
Get a quote from J & J Custom Builders Inc
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