Updated: May 29, 2026
Location and Projects
Address
16446 TURNBURY COURT, Chino Hills, CA, 91709
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C N K Cornerstone Landscape Contractor
C N K Cornerstone Inc, 16446 Turnbury Ct, Chino Hills, CA (Employees: Sun Mi Kwon and Won Kyu Chung) holds a Landscaping license according to the California license board.
Their BuildZoom score of 104 ranks in the top 9% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring C N K Cornerstone Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
C N K Cornerstone Inc Services
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C N K Cornerstone Inc Contact Information
Phone Number: (909) 855-0855
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Address: 16446 TURNBURY COURT, Chino Hills, CA 91709
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Building Permits by C N K Cornerstone Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Installation of new 85 sq ft pond with 4 water feature new bbq in the backyard (all plumbing and electrical are existing nothing new) addition (3) new electrical outlets in the backyard
Valuation:
$18,000
Permit #:
B18-000-271
Status:
final
Fee:
$528
Permit Type:
Dwellings
Building Type:
N/A
Bbq counter and 4 outlets
Valuation:
$3,000
Permit #:
RESI19-502
Status:
issued
Fee:
$353
Permit Type:
Alteration or repair
Building Type:
N/A
Wall-nonretain built-in outdoor b.b.q. (42 h 36 w 12 l) pilasters (36 h x 24 x 24") with lights on top (2 in front & 2 in rear yard) gas & sewer lines lawn sprinkler system & other irrigation. jade at blackstone pa1. plan 1ar 2806 sq ft living 662 sq ft garage
Valuation:
$2,200
Permit #:
B12-000-278
Status:
issued
Fee:
$376
Permit Type:
R-3 residence 1-2...
Building Type:
N/A
Wall-nonretain built-in outdoor b.b.q pilasters gas & sewer lines lawn sprinkler system & other irrigation. jade at blackstone pa1.plan 2c 3108 sq ft living 486 sq ft garage
Valuation:
$12,000
Permit #:
B12-000-750
Status:
final
Fee:
$378
Permit Type:
R-3 residence 1-2...
Building Type:
N/A
Residential install sewer line for sink gas line for bbq masonry bbq 5 electrical outlets. concrete & stone paving
Valuation:
$22,000
Permit #:
B15-000-250
Status:
final
Fee:
$271
Permit Type:
Value
Building Type:
N/A
Gas sewer sink and electrical for bbq island and free standing trellis structure
Valuation:
$0
Permit #:
00669537-RMO
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Patio cover construct free-standing lattice top patio cover in rear yard. jade at blackstone pa1. plan 2c 3108 sq ft living 486 sq ft garage
Valuation:
$12,000
Permit #:
B12-000-751
Status:
final
Fee:
$284
Permit Type:
R-3 residence 1-2...
Building Type:
N/A
Install 2 receptacles/switches and gas line to new bbq
Valuation:
$1,500
Permit #:
B17-000-279
Status:
final
Fee:
$208
Permit Type:
Dwellings
Building Type:
N/A
(2) attached open lattice patio covers & (1) open deck on 2nd floor new electric outlets/switch
Valuation:
$12,799
Permit #:
00584879-RBPR
Status:
final
Fee:
$312
Permit Type:
N/A
Building Type:
N/A
945 sq ft detached lattice patio*engineered
Valuation:
N/A
Permit #:
B1501180
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Gas sewer and electric for bbq
Valuation:
N/A
Permit #:
00626041-MISR
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Gasline for portable bbq. electrical outlets
Valuation:
N/A
Permit #:
00778937-MISR
Status:
final
Fee:
$117
Permit Type:
N/A
Building Type:
N/A
Attached open roof patio cover
Valuation:
$9,747
Permit #:
00799003-PCV
Status:
final
Fee:
$322
Permit Type:
N/A
Building Type:
N/A
Gas/elec. for bbq; 4 outlets; extend existing sewer line (no landscaping) water service
Valuation:
N/A
Permit #:
PMT2017-03340
Status:
final
Fee:
$400
Permit Type:
N/A
Building Type:
N/A
4 outdoor receticle out lets; 2 lights
Valuation:
N/A
Permit #:
B16-000-691
Status:
issued
Fee:
$147
Permit Type:
N/A
Building Type:
N/A
Gas outlet for portable bbq
Valuation:
N/A
Permit #:
00781796-MISR
Status:
final
Fee:
$85
Permit Type:
N/A
Building Type:
N/A
Residence solid tile roof patio cover
Valuation:
$3,600
Permit #:
00440384-RBPR
Status:
final
Fee:
$185
Permit Type:
N/A
Building Type:
N/A
Gas and electrical for bbq. sink and sewer in backyard
Valuation:
N/A
Permit #:
00729420-MISR
Status:
expired
Fee:
$151
Permit Type:
N/A
Building Type:
N/A
Conduit run and bonding ring for future portable spa
Valuation:
N/A
Permit #:
B16-000-714
Status:
expired
Fee:
$204
Permit Type:
Dwellings
Building Type:
N/A
Gas sewer sink and electrical for bbq island and free standing trellis structure
Valuation:
$1,610
Permit #:
00669552-PCV
Status:
expired
Fee:
$394
Permit Type:
N/A
Building Type:
N/A
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C N K Cornerstone Inc License info
Verified License
| License # | 854438 |
| Status | Active |
| State | California |
| Type | Landscaping |
| Business Type | Corporation |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for C N K Cornerstone Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
104
BuildZoom Score
Bonded
| Bonded Agent | Contractor's Bond History |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | State Compensation Insurance Fund |
18
Permits
- Building permit records show that C N K Cornerstone Inc has worked on 18 permitted projects.
C N K Cornerstone Inc Employees
SK
Sun Mi Kwon
Rmo
WC
Won Kyu Chung
Ceo / President