Updated: May 18, 2026
Location and Projects
Address
P O BOX 1061, Downey, CA, 90240
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William A Rios Construction
Serving Downey, California and the surrounding areas, William A Rios brings over a decade of experience to residential and commercial construction projects. Since establishing his business in 2013, William A Rios has managed a range of building and remodeling projects, as reflected by a steady portfolio of permitted work over 11 years. The company provides general contracting services, supporting clients through various stages of construction, renovation, and improvement. With expertise built from 27 permitted projects, William A Rios is familiar with the local building codes and permitting processes essential for smooth project execution in Los Angeles County. Clients in Downey and nearby communities rely on his proven experience in both new construction and property updates for local homes and businesses.
William A Rios Services
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William A Rios Contact Information
Phone Number: (213) 440-1290
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Address: P O BOX 1061, Downey, CA 90240
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William A Rios Downey
Quality
107
94th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
William A Rios has a BuildZoom score of 107, which places them above 94% of 336,931 contractors in California.
Activity
|
16 projects
|
2025 |
|
8 projects
|
2024 |
|
9 projects
|
2023 |
Our building permit records indicate that William A Rios has worked on at least
33.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Experience
|
15 projects
|
New Constructions |
Analyzing permits over the last 4 years shows that William A Rios mostly works on
new construction
projects.
Pricing
|
4 projects
|
< $5k |
|
4 projects
|
$5k-$20k |
|
4 projects
|
$100k-$250k |
|
10 projects
|
$250k-$500k |
|
1 project
|
$500k-$1mil |
The typical size of their permits is approximately $214,827. This graph shows the distribution of these job values.
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
This is a sample of this contractor's permits. Click here to access their complete permit history.
(n) 34 x 41 (3395 sf) 3-story duplex with attached 2-car garage (387.5 sf) at rear. 2 of 2
Valuation:
$493,015
Permit #:
21010-10000-02148
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New 3-story duplex with attached garages in rear *** 2 of 2 ***
Valuation:
$350,000
Permit #:
23010-30000-03905
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit to 22010-10000-04147 to change ownership to aqa operations llc
Valuation:
N/A
Permit #:
22010-10001-04147
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit to 22010-10000-04144 to change ownership to aqa operations llc
Valuation:
N/A
Permit #:
22010-10001-04144
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit to 22010-10000-04149 to change ownership to aqa operations llc
Valuation:
N/A
Permit #:
22010-10001-04149
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Supplemental permit to 22010-10000-04143 to change ownership to aqa operations llc
Valuation:
N/A
Permit #:
22010-10001-04143
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
(n) 29.5 x 40.5 (2160.5 sf) 2-story duplex at front. 1 of 2
Valuation:
$324,279
Permit #:
21010-10000-02146
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
(n) 2-story adu/garage 1st story garage 2nd story adu per lamc 12.22 a.33(c)(d) 2 of 2
Valuation:
$237,795
Permit #:
22010-10000-03969
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Proposed 3-story duplex with attached adu -front unit
Valuation:
$480,000
Permit #:
22010-10000-04147
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
(n) 3-story duplex w/attached 4-car garage (rear unit)
Valuation:
$320,000
Permit #:
22010-10000-04144
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Eplan: proposed new two-story detached accessary dwelling unit per lamc 12.22a.33(c)and (d)
Valuation:
$128,000
Permit #:
23010-10000-03301
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New 2-story duplex a in front *** 1 of 2 ***
Valuation:
$310,000
Permit #:
23010-30000-03904
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New 2-story (40 x 54.5') duplex (zc: 3121.5 sf) with attached 4-car garage (702 sf) at rear. 2 of 2
Valuation:
$410,000
Permit #:
21010-10000-02951
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Demolition of existing single family dwelling and detached garage. method of demolition will be by handwreck. sewer cap and fence for pedestrian protection is required per dpi. clear lot
Valuation:
$6,000
Permit #:
22019-10000-04578
Status:
expired
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New three story duplex. at front of lot
Valuation:
$390,000
Permit #:
22010-10000-03894
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New 2-story duplex (zc: 2434 sf) at front 1 of 2
Valuation:
$262,000
Permit #:
21010-10000-02953
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New 2-story duplex over basement in front (47'-2"x38'-6') fire sprinkler nfpa 13d
Valuation:
$375,000
Permit #:
18010-20000-03852
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
(n) 3-story duplex 1 of 2
Valuation:
$713,255
Permit #:
22010-10000-03968
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
New 3-story duplex (rear) (34'-3""x41'-0") fire sprinkler nfpa 13d
Valuation:
$398,000
Permit #:
18010-20000-03853
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Eplan: supplemental to permit 22010-10000-04655 to revise the building height per the height survey
Valuation:
$1,000
Permit #:
22010-10001-04655
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
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William A Rios License info
Verified License
| License # | 866335 |
| Status | Active |
| State | California |
| Type | General Building, Fire Protection |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for William A Rios at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
107
BuildZoom Score
Bonded
| Bonded Agent | Western National Mutual Insurance Company |
| Bond Value | $15,000 |
61
Permits
- Building permit records show that William A Rios has worked on 61 permitted projects.
William A Rios Employees
WR
William Anthony Rios
Owner