Sf Twin Boys Corp. Dba Master Builders
Remodeling contractor based in San Francisco. Licensed since 2004.
- License active
- Workers' comp on file
4 jobs on San Francisco permits, 2021 to 2026: 3 remodels, 1 ADU. 1,101st most remodel permits of 1,150 contractors in San Francisco.
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 850407, active in the state's records on Sep 23, 2026General engineering, general 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 2004 | |
| Jobs on record | 4 jobs on San Francisco permits, 2021 to 2026: 3 remodels, 1 ADUTheir permits mention 3 kitchens, 3 bathrooms.1,101st most remodel permits of 1,150 licensed contractors in San Francisco. That counts jobs, not quality.Our San Francisco permit records cover September 2021 to September 2026. |
Records: the state license board and City of San Francisco 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 850407 on CSLB
Cost and timing
All remodel jobs in San Francisco: $20,000 to $78,000
Half of 14,013 city permits list an amount in this range. Permit amounts are often lower than what you pay.
- Kitchen remodels in San Francisco: $25,000 to $89,000 (8,666 permits)
- Bathroom remodels in San Francisco: $20,000 to $80,000 (10,979 permits)
- Basement remodels in San Francisco: $50,000 to $290,000 (316 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 $50,000 (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 San Francisco.
Get 2 or 3 written quotes.
Permit timeline
Across San Francisco, a remodel 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. The permit itself is usually issued the same day. How long remodel jobs take.
Track record
Where they work most
- 941334 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 |
|---|---|---|---|
| Mar 10, 2026 | Remodel1st flr: convert (e) kitchen to masterbedroom w/full bath | 94133 | $75,000 |
| Feb 13, 2026 | RemodelBack unit: all interior work, all in kind replacement, no structural work | 94133 | $50,000 |
| Dec 31, 2025 | ADURear bldg: add 2 adu, local adu program per planning code section 207.1 exterior work includes new… | 94133 | $80,000 |
| Oct 29, 2021 | RemodelRemodel (e) kitchen; remodel two (e) bathrooms and convert (e) closet to (n) full bathroom | 94133 | $45,000 |
What to ask before you hire
About Sf Twin Boys Corp. Dba Master Builders
- 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 Sf Twin Boys Corp. Dba Master Builders
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