Updated: Jun 01, 2026
Location and Projects
Address
P O BOX 2635, San Marcos, CA, 92079
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AOS Construction
AOS Inc, San, Po Box 2635, San Marcos, CA (Owned by: Richard Allen Cosand) holds a Roofing, General Building license and 1 other license according to the California license board.
Their BuildZoom score of 97 ranks in the top 18% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring AOS Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
AOS Inc Services
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AOS Inc Contact Information
Phone Number: (760) 745-9509
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Address: P O BOX 2635, San Marcos, CA 92079
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AOS Inc San Marcos
Quality
97
82nd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
AOS Inc has a BuildZoom score of 97, which places them above 82% of 336,931 contractors in California.
Activity
|
2 projects
|
2025 |
|
2 projects
|
2023 |
Our building permit records indicate that AOS Inc has worked on at least
4.0 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.
Pricing
|
1 project
|
$50k-$100k |
|
1 project
|
$100k-$250k |
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.
(eplan) commercial reroof.*roof sheathing inspection is required prior to any new material placement*
Valuation:
$200,000
Permit #:
00944089-MISC
Status:
final
Fee:
$509
Permit Type:
N/A
Building Type:
N/A
Residence inn by marriott: reroof of existing hotel (29, 000 sf
Valuation:
N/A
Permit #:
CBC2023-0101
Status:
final
Fee:
N/A
Permit Type:
Reroof
Building Type:
N/A
Carlsbadinn; removal of existing shake roof system & install cedarlite 600 roof sysyem with copper flashings
Valuation:
N/A
Permit #:
CBC2023-0276
Status:
issued
Fee:
N/A
Permit Type:
Reroof
Building Type:
N/A
Carlsbad inn: reroof 120 sq of wood shingle w conc tile (plans on file)
Valuation:
N/A
Permit #:
CBC2022-0288
Status:
issued
Fee:
N/A
Permit Type:
Reroof
Building Type:
N/A
Comreroof - white id#0608-0008
Valuation:
$200,000
Permit #:
B18-01471
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Commercial reroof
Valuation:
N/A
Permit #:
B17-2184
Status:
complete
Fee:
$2,751
Permit Type:
N/A
Building Type:
N/A
Re-roof (0676-0221) & skylights
Valuation:
$209,000
Permit #:
B20-00293
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Tear off & re-roof (00676-0221)
Valuation:
$80,000
Permit #:
B21-01424
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Roofing for fire station. remove exsting clay tile roof system and install new concrete (saxony slate) tile
Valuation:
N/A
Permit #:
BS1229928
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Re-roof
Valuation:
$200,000
Permit #:
1309190076
Status:
N/A
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
1998-10-16
Cross street: claudan stactivity code:426x05description of work:hra reroof
Valuation:
$0
Permit #:
PDS1998-1005-98002202
Status:
PC Expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2000-12-15
5000 sq ft re-roof25-may-2004.courtesy renewal good until 25-jun-2004.ljc
Valuation:
$0
Permit #:
PDS2000-1030-20000774
Status:
Completed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Commercial reroof
Valuation:
N/A
Permit #:
B17-2184
Status:
complete
Fee:
$2,751
Permit Type:
N/A
Building Type:
N/A
2 ply torch applied built up roof system removal of existin
Valuation:
$82,820
Permit #:
BLDG25-2424
Status:
issued
Fee:
$572
Permit Type:
> 3 000 sq ft
Building Type:
N/A
Reroof - torch down overlay only no tear off.roof top addressing required cool roof/low slope.* subject to questionaire*
Valuation:
$100,000
Permit #:
00710423-MISC
Status:
expired
Fee:
$297
Permit Type:
N/A
Building Type:
N/A
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AOS Inc Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
AOS Inc License info
Verified License
| License # | 669231 |
| Status | Active |
| State | California |
| Type | Roofing, General Building |
| Business Type | Corporation |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for AOS Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | NAT-F120663-1 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Corporation |
- According to the United States Environmental Protection Agency, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for AOS Inc at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
97
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Redwood Fire & Casualty Insurance Co |
13
Permits
- Building permit records show that AOS Inc has worked on 13 permitted projects.
AOS Inc Employees
ES
Evan James Serpanos
Rmo/Ceo/Pres
RC
Richard Allen Cosand
Owner