Updated: May 02, 2026
Location and Projects
Address
10442 BROOKSHIRE AVENUE, Downey, CA, 90241
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Greentech Development HVAC/Mechanical Contractor
Greentech Development, 10442 Brookshire Ave, Downey, CA (Owned by: Chris Hwan Won) holds a General Building, Electrical, Warm Air Heating, Ventilating And Air Conditioning, Plumbing license and 1 other license according to the California license board.
Their BuildZoom score of 96 ranks in the top 20% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Greentech Development, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Greentech Development Contact Information
Phone Number: (562) 706-6936
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Address: 10442 BROOKSHIRE AVENUE, Downey, CA 90241
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Greentech Development Downey
Quality
96
80th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Greentech Development has a BuildZoom score of 96, which places them above 80% of 336,931 contractors in California.
Activity
|
2 projects
|
2025 |
Our building permit records indicate that Greentech Development has worked on at least
2.0 projects over the past year.
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
|
$20k-$50k |
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 Greentech Development
This is a sample of this contractor's permits. Click here to access their complete permit history.
Lee's dental - ten imp: interior tenant improvement - renovate beauty salon to create dental office; install non-bearing stud wall dental chairs and create ada compliant bathroom
Valuation:
N/A
Permit #:
MEC25-00316
Status:
complete
Fee:
$163
Permit Type:
N/A
Building Type:
N/A
Non-residential addition: 1 495 sq. ft. to enclose existing drive-thru canopy into new storage space (s). with parking restripe
Valuation:
$29,464
Permit #:
BLD2025-02935
Status:
issued
Fee:
N/A
Permit Type:
Non residential a...
Building Type:
N/A
>>supplemental to bld24-01833<< lee's dental - construct storage shed for vacuum machine and compressor
Valuation:
N/A
Permit #:
BLD25-00603
Status:
complete
Fee:
$509
Permit Type:
N/A
Building Type:
N/A
Tenant improvement
Valuation:
$313,257
Permit #:
00863473-SBPT
Status:
final
Fee:
$1,962
Permit Type:
N/A
Building Type:
N/A
Applicant brought in set of plans to be re-plan checked because the contractor lost the set of plans tutti frutti yogurt shop tenant improvement and change of use from beauty salon to take-out restaurant including interior non-structural remodel. plan chk is for title 24
Valuation:
N/A
Permit #:
12041-10001-28467
Status:
approved
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Tenant improvement and change of use from beauty salon to take-out restaurant including interior non-structural remodel. re-stripe parking at rear of building to create two additional stalls
Valuation:
N/A
Permit #:
12016-10000-20021
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Provide inside seating and change of use from restuaurant - take out to restaurant. eight additional parking stalls required and provided at rear of building. no change of floor area
Valuation:
$5,000
Permit #:
12016-10002-20021
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Tenant improvement (frozen yogurt take out rest.) per the applicant the project is approved by the los angeles county health department and city of los angeles bureau of sanitation
Valuation:
N/A
Permit #:
12042-10000-21808
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Tenant improvement and change of use from beauty salon to take-out restaurant including interior non-structural remodel. plan chk is for title 24
Valuation:
N/A
Permit #:
12041-10000-28467
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Early start demolition to remove non bearing partition walls t- bar ceiling soffit counters floor tiles yogurt machines
Valuation:
$4,000
Permit #:
13016-10000-09584
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Supplemental permit to provide soffit detail above service counter in take-out restaurant
Valuation:
$501
Permit #:
12016-10001-20021
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Supplemental permit to 13044-20000-00953 to addition (1) fan & (2) air/inlet
Valuation:
N/A
Permit #:
13044-10001-00953
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Service upgrade from 200 amp to 400 amp
Valuation:
N/A
Permit #:
B1601350
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Tenant improvement
Valuation:
$85,481
Permit #:
00548687-SBPT
Status:
final
Fee:
$438
Permit Type:
N/A
Building Type:
N/A
Trap primer hose (reel) expansion tank
Valuation:
N/A
Permit #:
13042-10000-01042
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Toilets (5) urinals (3) retrofittt
Valuation:
N/A
Permit #:
12042-90000-14281
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Install walk-in cooler/freezer
Valuation:
N/A
Permit #:
13044-20000-00953
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Replace toilets and sinks
Valuation:
N/A
Permit #:
12042-20000-18631
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Toilets retrofit
Valuation:
N/A
Permit #:
12042-90000-17361
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Toilets retrofit
Valuation:
N/A
Permit #:
12042-90000-19224
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
Greentech Development License info
Verified License
| License # | 1072897 |
| Status | Active |
| State | California |
| Type | General Building, Electrical, Warm Air Heating, Ventilating And Air Conditioning, Plumbing |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Greentech Development at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 943496 |
| Status | Inactive |
| State | California |
| Type | General Building, Solar, Plumbing, Electrical, Warm Air Heating, Ventilating And Air Conditioning |
| 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. If this is your business, please update your license status.
Check this license's status for Greentech Development at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
Bonded
| Bonded Agent | Wesco Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Wesco Insurance Company |
23
Permits
- Building permit records show that Greentech Development has worked on 23 permitted projects.
Greentech Development Employees
CW
Chris Hwan Won
Owner