Walter H Construction
ADU builder based in Baldwin Park.
- License 1067829 was not in the state's records on Sep 23, 2026
3 ADU jobs on Los Angeles permits, 2023 to 2025.
We could not find an active or renewable license for this business in the state's records on Sep 23, 2026. Check the license with the state before you hire.
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 1067829 was not in the state's records on Sep 23, 2026 | Problem |
| Jobs on record | 3 ADU jobs on Los Angeles permits, 2023 to 2025Every permit we have for them is ADU.They are based in Baldwin Park. Work outside Los Angeles is not in these records.Our Los Angeles permit records cover September 2023 to September 2026. |
Records: the state license board and City of Los Angeles permits.
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 $40,000 (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
Where they work most
- 913451 job
- 913311 job
- 900181 job
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 |
|---|---|---|---|
| Dec 2, 2025 | ADUConvert 2-car garage to ADU per GCS 65852.2(e)(1)(A). All work per WFP | 91345 | $40,000 |
| Jan 10, 2024 | ADUCONVERT EXISITING DETACHED ACC. BUIILDING TO ADU PER GCS65852.2(e)(1) | 91331 | $30,000 |
| Oct 4, 2023 | ADUGarage conversion into one story ADU per LAMC 12.22 A33 (c)(d) | 90018 | $89,000 |
What to ask before you hire
About Walter H Construction
- Do not hire until the contractor shows you an active license.
- 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 Walter H Construction
Five quick questions. We pass your request to Walter H Construction.
Request for Walter H Construction
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We pass it to Walter H Construction. 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.
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