William Construction
ADU builder working in Sacramento.
- No license matched this business by name in the state's records
21 jobs on Sacramento permits, 2023 to 2026: 7 ADUs, 6 roofing jobs, 5 panel upgrades, 2 remodels, 1 solar installation. 12th most ADU permits of 47 contractors in Sacramento.
What the public records show
From the city's permits, one question at a time.
| Question | Records show | Mark |
|---|---|---|
| Licensed? | No license matched this business by name in the state's records | Ask them |
| Jobs on record | 21 jobs on Sacramento permits, 2023 to 2026: 7 ADUs, 6 roofing jobs, 5 panel upgrades, 2 remodels, 1 solar installation12th most ADU permits of 47 contractors in Sacramento. That counts jobs, not quality.Our Sacramento permit records cover September 2021 to August 2026. |
Records: City of Sacramento permits.
Cost and timing
All ADU jobs in Sacramento: $93,000 to $187,000
Half of 695 city permits list an amount in this range. Permit amounts are often lower than what you pay.
- Detached ADUs in Sacramento: $100,000 to $190,000 (253 permits)
- Garage conversions in Sacramento: $50,000 to $120,000 (70 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 $100,808 (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 Sacramento.
Get 2 or 3 written quotes.
Track record
7 jobs in the last 12 months, about the same as 7 the year before
Where they work most
- 958206 jobs
- 958225 jobs
- 958243 jobs
- 958382 jobs
- 958152 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 |
|---|---|---|---|
| Jun 22, 2026 | Reroof, 18 squares (1,800 sq ft) | 95822 | $12,000 |
| May 6, 2026 | Panel upgrade | 95822 | $4,200 |
| Mar 12, 2026 | Panel upgrade | 95822 | $2,720 |
| Nov 25, 2025 | ADU, 974 sq ftEPC - Convert existing building to 3 bed 2 bath 974 sq | 95838 | $111,056 |
| Nov 25, 2025 | Solar, 974 sq ftEPC - Convert existing building to 3 bed 2 bath 974 sq | 95838 | $111,056 |
| Nov 21, 2025 | Remodel, 1754 sq ftPermit to Complete Finals Only under expired permit RES-2327189 - EPC - Convert and remodel… | 95820 | $7,500 |
| Nov 21, 2025 | ADU, 1754 sq ftPermit to Complete Finals Only under expired permit RES-2327189 - EPC - Convert and remodel… | 95820 | $7,500 |
| Apr 14, 2025 | Reroof, 20 squares (2,000 sq ft) | 95820 | $14,800 |
| Mar 11, 2025 | Panel upgrade | 95822 | $2,461 |
| Mar 11, 2025 | Panel upgrade | 95824 | $1,650 |
| Nov 6, 2024 | ADUEPC - Build 1 bedroom ADU from shelf ready City plans | 95828 | $100,808 |
| Sep 26, 2024 | Reroof, 18 squares (1,800 sq ft) | 95832 | $5,400 |
| Aug 27, 2024 | Remodel, 1754 sq ftEPC - Convert and remodel exisiting 1754 sq ft Single Family Home into Duplex | 95820 | $30,000 |
| Aug 27, 2024 | ADU, 1754 sq ftEPC - Convert and remodel exisiting 1754 sq ft Single Family Home into Duplex | 95820 | $30,000 |
| Aug 12, 2024 | ADUEPC - Shelf ready ADU, 2 bed, 1 bath 747 sf ADU with 44 sf porch and 9 sf utility closet | 95815 | $125,851 |
| Aug 2, 2024 | Reroof, 12 squares (1,200 sq ft) | 95824 | $14,500 |
| Jul 29, 2024 | Panel upgrade | 95824 | $3,500 |
| Jul 8, 2024 | ADU, 900 sq ftEPC - 900 sq ft ADU 1st floor 462.5sq ft , patio cover 100 sq ft, 2nd floor 437.5 sq ft… | 95817 | $152,553 |
| Oct 13, 2023 | ADU, 527 sq ftDe3mo of a adu 527 sqft | 95815 | $8,000 |
| Oct 4, 2023 | Reroof, 22 squares (2,200 sq ft) | 95822 | $13,500 |
| Aug 23, 2023 | Reroof, 20 squares (2,000 sq ft) | 95820 | $8,000 |
What to ask before you hire
About William Construction
- Ask for the license number and check it with the state.
- Ask what the warranty covers and for how long, in writing.
- Search their name on the Better Business Bureau site, and read their reviews.
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 William Construction
Five quick questions. We pass your request to William Construction.
Request for William Construction
- Where
- Job
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- Goes to
You decide who to hire. Your details go only to the contractors you pick. How we use your details
Sent. We have your request.
We pass it to William 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.
Open your job roomMore ADU builders near 95820 and 95822
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See all 47 ADU builders in Sacramento, ranked by jobs
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