Updated: May 09, 2026
Location and Projects
Address
556 N DIAMOND BAR BL 304, Diamond Bar, CA, 91765
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Chang, Hank Yi-chung Construction
Serving the Diamond Bar, California community, Hank Yi-chung Chang brings 30 years of experience in general contracting. His portfolio includes residential construction projects throughout Diamond Bar and neighboring areas. Over three decades, Chang has managed a range of home improvement and renovation work, guiding clients from planning through completion. His long-standing presence in the local construction industry reflects a deep familiarity with Southern California building codes and neighborhood needs. Chang works primarily with homeowners seeking updates or additions to their residences.
Chang, Hank Yi-chung Services
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Chang, Hank Yi-chung Contact Information
Phone Number: (909) 801-2638
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Address: 556 N DIAMOND BAR BL 304, Diamond Bar, CA 91765
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Chang, Hank Yi-chung Diamond Bar
Quality
104
91st percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Chang, Hank Yi-chung has a BuildZoom score of 104, which places them above 91% of 336,931 contractors in California.
Activity
|
6 projects
|
2025 |
|
5 projects
|
2024 |
|
3 projects
|
2023 |
Our building permit records indicate that Chang, Hank Yi-chung has worked on at least
14.0 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
|
< $5k |
|
1 project
|
$50k-$100k |
|
1 project
|
$1mil+ |
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.
Revision to approved plans including potable water waste stormwater and sump pump and removal of low pressure gas system. updated hydraulic calculations change to heat pump type hot water system and addition of pex within units for potable water. waste and stormwater layout changes
Valuation:
N/A
Permit #:
20042-20001-16799
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Hvac tenant improvement. general hvac and two type-ii hoods
Valuation:
N/A
Permit #:
25044-10000-07004
Status:
plancheck
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Plan check only. revision to potable water pipe material only. previously approved plan and permit under #21042-10004-34985 & permit under #21042-10000-34985
Valuation:
N/A
Permit #:
21042-10005-34985
Status:
approved
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Revision to previously approved plan. permit is under #21042-10000-34985. plumbing system includes potable water with booster pumps and waste/vent. 3 water meter; 3 backflow device. revised water calculation and risers. ***note to pc: different desginer from the previously approved plan. new plan set provided for water and waste
Valuation:
N/A
Permit #:
21042-10004-34985
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
General hvac. work includes (3) type i hoods and (4) type ii hoods. contractor #: 821803 b license says they will pull all mep permits
Valuation:
$3,000,000
Permit #:
20044-10000-04879
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
New attached adu: 1) convert existing 408 sf to adu and addition 264sf to be part of the proposed attached adu. 2) interior remodel to existing single family dwelling adu checked per lamc 12.22 a.33(c) and (e) up to 800 sf to go over the floor area limit per lamc 12.22 a.33(c)(1)(iii)
Valuation:
$41,200
Permit #:
22016-20000-14869
Status:
issued
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Plan check for potable water only. 2 domestic meter no backflow device. partial permit fees under 24042-20000-04032 24042-20000-04030 24042-20000-04033 24042-20000-04034
Valuation:
N/A
Permit #:
24042-10000-19382
Status:
triage
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
General hvac
Valuation:
N/A
Permit #:
24044-10000-17807
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Installation of potable water wste/vent with existing sewage ejector and medium pressure gas system. (e) 2 water meter with (n)) backflow device and (n) prv
Valuation:
N/A
Permit #:
20042-10000-07847
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Eplan constructing 349 sf (19.33 x 18') new adu attached to existing detached garage
Valuation:
$70,000
Permit #:
22014-10000-03793
Status:
final
Fee:
N/A
Permit Type:
1 or 2 family dwe...
Building Type:
N/A
Plan check only. general hvac revisions
Valuation:
N/A
Permit #:
21044-20001-10153
Status:
approved
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Revision to previously approved plan 20042-10000-07847. addition 3 backflow devices for drinking equipment revise the sewage ejector model
Valuation:
N/A
Permit #:
20042-10003-07847
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Plan check only. revision to previously approved plan 24044-10000-17807. duct rework
Valuation:
N/A
Permit #:
24044-10001-17807
Status:
approved
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
New plumbing systems for apartment building. includes potable water with booster pump waste and vent low pressure gas system sump pump and sewage ejector systems. new 4 domestic water meter 6 building supply and 4 backflow preventer
Valuation:
N/A
Permit #:
16042-10000-10906
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Potable water only for oshpd 3. 2 inch domestic water meter with 2 1/2"backflow preventer
Valuation:
N/A
Permit #:
19042-10000-08313
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Plan check only permit under 21044-10000-05411. revise equipment schedule and duct routing for type ii hood
Valuation:
N/A
Permit #:
21044-10001-05411
Status:
approved
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
New plumbing system for 4-story (12 condo units) building w 2-story underground parking. includes domestic water waste & vent. ================================================================= h/l pressure: 75/66 psi domestic water meter's size: 2 rp backflow device size: n/a water pipe sizing = 7.4 psi/100ft
Valuation:
N/A
Permit #:
14042-10000-12325
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
Plan check only - revision to approved plans per inspection notice
Valuation:
N/A
Permit #:
20042-20001-04580
Status:
approved
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Plan check only for potable water. connection to 1-1/2 inch domestic water meter no backflow preventer. permit under 18042-20000-29446
Valuation:
N/A
Permit #:
18042-10001-29446
Status:
approved
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
General hvac and 1 type 2 hood for tenant improvement
Valuation:
N/A
Permit #:
21044-10000-05411
Status:
final
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
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Chang, Hank Yi-chung License info
Verified License
| License # | CAM24241 |
| Status | Active |
| State | California |
- BuildZoom has not verified this license since June, 2015.
Verify this license's status for Chang, Hank Yi-chung at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 731480 |
| Status | Inactive |
| State | California |
| Type | General Building |
- 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 Chang, Hank Yi-chung 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 | American Contractors Indemnity Company |
| Bond Value | $15,000 |
125
Permits
- Building permit records show that Chang, Hank Yi-chung has worked on 125 permitted projects.
Chang, Hank Yi-chung Employees
HC
Hank Yi Chung Chang
Sole Owner