Updated: Jun 06, 2026
Location and Projects
Address
15642 Sand Canyon Ave, Irvine, CA, 92618
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Cornerstone Builders Co Photos
Cornerstone Builders Construction
Cornerstone Builders Co, 15642 Sand Canyon Ave, Irvine, CA (Owned by: Ronald Keith Bishop) holds a General Building license and 8 other licenses according to the California license board.
Their BuildZoom score of 107 ranks in the top 6% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Cornerstone Builders Co, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Cornerstone Builders Co Services
Start a project today:
Custom Home Build
New Home Construction
Medium Multi-Family New Con...
Other Residential New Const...
Multi-Room Remodel
Kitchen Remodel
Bathroom Remodel
Basement Remodel
Medium Multi-Family Remodel...
Other Residential Remodel
Office Renovation
Retail Renovation
Other Commercial Renovation
Roofing
Doors and Windows
Framing
Other Carpentry
Drywall
Interior Plaster
Water Damage Restoration
Fire Damage Restoration
Other Restoration
Gutters and Flashing
Skylights
Cabinets
Finish Carpentry
Historical Restoration
Deck Repair
Other Commercial New Constr...
Hotel Renovation
Warehouse Renovation
Whole Home Remodel
Addition
Healthcare Facility Renovation
Cornerstone Builders Co Contact Information
Phone Number: (714) 240-3701
Address: 15642 Sand Canyon Ave, Irvine, CA 92618
Cornerstone Builders Co Irvine
Quality
107
94th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Cornerstone Builders Co has a BuildZoom score of 107, which places them above 94% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
1 project
|
2024 |
Our building permit records indicate that Cornerstone Builders Co has worked on at least
2.0 projects over the past 2 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
|
< $5k |
|
1 project
|
$5k-$20k |
|
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.
Building Permits by Cornerstone Builders Co
This is a sample of this contractor's permits. Click here to access their complete permit history.
Master bathroom remove and replace with new vanity cabinet/sink; toilet install stackable washer and dryer replace old electric subpanel with new install tiles on floor linen cabinet heating pump system furnace and air conditioning
Valuation:
$9,800
Permit #:
COMBR-2025-00332
Status:
issued
Fee:
$612
Permit Type:
N/A
Building Type:
N/A
Addition to commercial bldg: adding 2 535 sf dental lab to (e) 2852 sf dental office and on site work: parking lot expansion lighting trash enclosure is existing ***signs to be under separate cover***
Valuation:
$374,753
Permit #:
BP-2020-08027
Status:
issued
Fee:
N/A
Permit Type:
Office bank and p...
Building Type:
N/A
Interior remodel to include kitchen primary bedroom + bathroom and hall bathroom. new concrete landing in rear. new awning over existing french doors in living room. (654sf total remodel)
Valuation:
$166,010
Permit #:
BD-2023-290446
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Kitchen remodel electrical dryer receptacle bathrooms models tile addition lights living room and dinning room and kitchen ceiling (subject to the field)
Valuation:
$2,500
Permit #:
COMBR-2025-00295
Status:
final
Fee:
$384
Permit Type:
N/A
Building Type:
N/A
An addition of 16 square feet to the first floor an addition of 903 square feet to create a second floor and a 1, 100 square foot interior alteration to the existing residential home. addendum 11/25/20: temporary power pole added
Valuation:
$650,000
Permit #:
BLD2020-00554
Status:
complete
Fee:
$12,749
Permit Type:
Addition
Building Type:
N/A
(unit 52) replacing windows to e2 sliders same size 4 windows
Valuation:
$2,000
Permit #:
BR-2025-00418
Status:
final
Fee:
$560
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2021-08-09
Cross street: jamacha rd. description of work: demolition of 528 sqft garage & 600 sqft shade structure note: _ it may not be possible to rebuild. _ the fact that there was an existing structure on your lot does not guarantee that you will be able to replace it if it is demolished. existence of a structure does not grandfather its use if it is removed. please see the zoning counter at... see more
Valuation:
N/A
Permit #:
PDS2021-RESALT-005513
Status:
complete
Fee:
$164
Permit Type:
N/A
Building Type:
N/A
Remove old shower valve tub valve and replace them with new. washer dryer box connecting
Valuation:
$1,500
Permit #:
PL-2025-00184
Status:
complete
Fee:
$110
Permit Type:
N/A
Building Type:
N/A
Remodel (e) half bathroom into full master bathroom: remove (e) closet to enlarge bathroom replace (e) pocket door with (n) swinging door replace 2 (e) windows (1 revised size) replace/relocate all plumbing fixtures install (n) ceiling fan and upgrade electrical. total remodel 112sf
Valuation:
$15,000
Permit #:
BD-2018-268268
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Expand bedroom/walkin closet/laundry addition
Valuation:
$32,709
Permit #:
-0306362
Status:
issued
Fee:
$563
Permit Type:
Addition
Building Type:
N/A
Total 678sf alteration to 1story sfd: remodel existing kitchen and remove walls between dining room and hallway. m.e.p. included
Valuation:
$15,000
Permit #:
BD-2018-268879
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Single family (alteration/repair) - kitchen & bathroom remodel (flat)
2018-05-18
Remodel (e) hallway bathroom
Valuation:
$7,000
Permit #:
BD-2015-255376
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Fire damage repair to (e) church. reframe damaged portion of roof (470 sf). upgrade (e) restrooms to ada. restripe (e) parking lot & provide (1) ada parking space & loading aisle
Valuation:
$100,000
Permit #:
1609190004
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Fire damage repair, replace drywall on entire 2nd floor, patch work on 1st floor, c/o (1) window, tear off and re-roof 17 squares c/o interior doors, new insulation
Valuation:
$70,000
Permit #:
1604260057
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Fire damge repair: remove existing foundation due to damage. construct a new foundation system rebuild existing sq footage and addition 295 sq ft room addition revised permit on 6/15/11 to addition temp power pole
Valuation:
$128,577
Permit #:
B1100509
Status:
final
Fee:
$1,868
Permit Type:
N/A
Building Type:
N/A
Non structural interior tenant improvement. to enlarge (e) restroom of retail space to comply with disabled access standards
Valuation:
$5,000
Permit #:
16016-20000-21871
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
7, 158 sq ft fellowship hall * 196 sq ft nursery* type v-1 hr (sprinkler substitution)* occupancy type a-2, e-2 & e3 - 2001 cbc* plumbing *8 toilets * 7 lavatory sinks * 1 mop sink *3 comparable sink *1 prep sink* 2 urinal *2 floor sink *1 water heater *5 gas outlets * 1 backflow preventer *2 drinking fountains * 1 sewer lateral *2 floor drains *1 hand sink *1hose bibb* electrical 600... see more
Valuation:
N/A
Permit #:
B0702069
Status:
C OF O
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Building
626 North Circle Dr, CA
2018-04-20
No Description Available
Valuation:
$55,104
Permit #:
268378
Status:
PENDING
Fee:
N/A
Permit Type:
New
Building Type:
Accbld
Kitchen remodel w/removal of closet & partition wall for washer/dryer area
Valuation:
$25,000
Permit #:
1611230025
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Kitchen remodel w/removal of closet & partition wall for washer/dryer area
Valuation:
$25,000
Permit #:
1611230025
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Cornerstone Builders Co License info
Verified License
| License # | 1004874 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Cornerstone Builders Co at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 527184 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Cornerstone Builders Co at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 828160 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of December 2025.
Verify this license's status for Cornerstone Builders Co at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 12208 |
| Status | Active |
| State | South Carolina |
| Type | Home Builders |
| Business Type | Sole Ownership |
- When BuildZoom last verified this license, it had an expiration date of June, 2014. Check the current license status of Cornerstone Builders Co with the South Carolina Contractor's Licensing Board
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 19566 |
| Status | Active |
| State | South Carolina |
| Type | Home Builders, Roofing,Masonry,Carpentry |
| Business Type | Sole Ownership |
- When BuildZoom last verified this license, it had an expiration date of June, 2014. Check the current license status of Cornerstone Builders Co with the South Carolina Contractor's Licensing Board
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 18564 |
| Status | Active |
| State | South Carolina |
| Type | Home Builders, Painter/Wall Paper,Drywall Install/Repair,Roofing |
| Business Type | Sole Ownership |
- When BuildZoom last verified this license, it had an expiration date of June, 2014. Check the current license status of Cornerstone Builders Co with the South Carolina Contractor's Licensing Board
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 27439 |
| Status | Active |
| State | South Carolina |
| Type | Carpentry |
| Business Type | Sole Ownership |
- When BuildZoom last verified this license, it had an expiration date of June, 2014. Check the current license status of Cornerstone Builders Co with the South Carolina Contractor's Licensing Board
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 506840 |
| Status | Inactive |
| State | California |
| Type | General Building, Doors, Gates And Activating Devices |
| Business Type | Sole Ownership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Cornerstone Builders Co at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 371784 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Cornerstone Builders Co 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 | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Norguard Insurance Company |
135
Permits
- Building permit records show that Cornerstone Builders Co has worked on 135 permitted projects.
Cornerstone Builders Co Employees
AT
Angello Titus Tina
Owner
GL
Greg J Lahey
Sole Owner
RB
Ronald Keith Bishop
Owner