Updated: Apr 29, 2026
Location and Projects
Address
31628 HAYMAN STREET, Hayward, CA, 94544
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Kwan Wo Ironworks Construction
Kwan Wo Ironworks Inc, 31628 Hayman St, Hayward, CA (Employees: Eric Kai Suen Mao, Florence Yuen Shan Kong, and Kelvin Kinfun Shum) holds a Steel, Structural, General Building 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 Kwan Wo Ironworks Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Kwan Wo Ironworks Inc Services
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Kwan Wo Ironworks Inc Contact Information
Phone Number: (510) 487-9628
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Address: 31628 HAYMAN STREET, Hayward, CA 94544
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Kwan Wo Ironworks Inc Hayward
Quality
97
82nd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Kwan Wo Ironworks Inc has a BuildZoom score of 97, which places them above 82% of 336,931 contractors in California.
Activity
|
1 project
|
2023 |
Our building permit records indicate that Kwan Wo Ironworks Inc has worked on at least
1.0 project 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
|
$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.
Building Permits by Kwan Wo Ironworks Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Alteration to mckinae building to include theater gym & classroom. alteration to middle classroom building - seismic & cosmetic
Valuation:
$20,000,000
Permit #:
201710040323
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
45 - school
All work done in unit #24 remove/add interior walls remodel bathroom relocate kitchen addition washer/dyer new lighting to modified spaces. install 8 lights 7 switches 8 receptacles 2 fans 1 dishwasher 1 microwave 1 range 1 smoke detector and washer/dryer. electrial heater at bathroom
Valuation:
N/A
Permit #:
E201403117955
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Unit 2: 8 lights 5 switches 3 receptacles 1 fan 1 dishwasher 1 range 1 smoke detector
Valuation:
N/A
Permit #:
E201408131956
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Unit # 605 - 6th floor: renovation of (e) one-bed apartment. in (e) building to include relocation and remodel of kitchen and bathroom. the addition of 1 bedroom and addition of ventless washer/dryer. all renovation not to exceed (e) envelope. maher - not req'd sprinklers under seperate permit only
Valuation:
$35,000
Permit #:
201503241721
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Unit 504 - 5th floor: 2 lights 1 switch 1 receptacle 1 dishwasher 1 garbage disposal 1 microwave 1 range 1 smoke detector; remodel unit # 504 at 5th floor. relocation of kitchen fixtures and cabinets. addition new bedroom & closet. upgrading of electrical and plumbing fixures. rerouting of electrical. wires and plumbing as needed
Valuation:
$0
Permit #:
E201504137719
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Unit # 605 - 6th foor: 3 lights 1 switch 1 receptacle 1 dishwasher 1 garbage disposal 1 microwave 1 range 1 smoke detector; remodel unit # 605 - 196 sq. ft. area of work. additon of one bedroom. relocation of kitchen addition of dishwasher. remodel of bathroom. addition of new washer and dryer
Valuation:
$0
Permit #:
E201504137717
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Unit 504 - 5th floor: 2 lights 1 switch 1 receptacle 1 dishwasher 1 garbage disposal 1 microwave 1 range 1 smoke detector; remodel unit # 504 at 5th floor. relocation of kitchen fixtures and cabinets. addition new bedroom & closet. upgrading of electrical and plumbing fixures. rerouting of electrical. wires and plumbing as needed
Valuation:
N/A
Permit #:
E201504137719
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
1st floor: unit # 111: 7 lights 4 switches 7 receptacles 1 fan 1 dishwasher 1 garbage disposal 1 range 1 smoke detector; addition of new washer and dryer; remodeling kitchen and bathroom extra lighting fixture in living room
Valuation:
$0
Permit #:
E201506169386
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
All work done in unit #24 remove/add interior walls remodel bathroom relocate kitchen addition washer/dyer new lighting to modified spaces. install 8 lights 7 switches 8 receptacles 2 fans 1 dishwasher 1 microwave 1 range 1 smoke detector and washer/dryer. electrial heater at bathroom
Valuation:
$0
Permit #:
E201403117955
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
All work done in unit #8 remodel interior walls remodel kitchen and bathroom. addition washer/dryer. in-fill vent shaft window in hallway. new lighting to modified space. 8 lights 7 switches 8 receptacles 2 fans 1 dishwasher 1 microwave 1 range 1 smoke detector washer/dryer
Valuation:
$0
Permit #:
E201405129573
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Unit 705 interior renovation within (e) building to include: relocation & remodel of (e) kitchen and bathroom 7 addition of den and bathroom and washer & ventless dryer
Valuation:
$60,000
Permit #:
201508144318
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
4th floor - unit # 402: 10 lights 10-12 switches 8 receptacles 2 fans 1 dishwasher 1 garbage disposal 1 smoke detector; remodeling kitchen and bathroom; new w/d; addition o f receptacles and lighting fixtures
Valuation:
N/A
Permit #:
E201506169384
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
All work done in unit 4. remodel addition interior walls. remodel bathroom relocate kitchen addition washer/dryer new lighting to modified spaces. 8 lights 7 switches 8 receptacles 2 fans 1 dishwasher 1 microwave 1 range 1 smoke detector washer/dryer
Valuation:
$0
Permit #:
E201405129574
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
1st floor: unit # 111: 7 lights 4 switches 7 receptacles 1 fan 1 dishwasher 1 garbage disposal 1 range 1 smoke detector; addition of new washer and dryer; remodeling kitchen and bathroom extra lighting fixture in living room
Valuation:
N/A
Permit #:
E201506169386
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Unit # 301: 8 lights 6 switches 5 receptacles 1 dishwasher 1 microwave 1 range 2 smoke detectors; remodel # 301 - 3rd floor - remodel (e) bathroom relocate (e) kitchen addition washer & dryer
Valuation:
$0
Permit #:
E201608309357
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
4th floor - unit # 402: 10 lights 10-12 switches 8 receptacles 2 fans 1 dishwasher 1 garbage disposal 1 smoke detector; remodeling kitchen and bathroom; new w/d; addition o f receptacles and lighting fixtures
Valuation:
$0
Permit #:
E201506169384
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
6th floor unit 603: 14 lights 7 switches 7 receptacles 2 fans 1 dishwasher 1 garbage disposal 1 microwave 1 smoke detector ; addition of new dishwasher relocate the bathroom addition of new washer & dryer
Valuation:
$0
Permit #:
E201506089185
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
All work done in unit #8 remodel interior walls remodel kitchen and bathroom. addition washer/dryer. in-fill vent shaft window in hallway. new lighting to modified space. 8 lights 7 switches 8 receptacles 2 fans 1 dishwasher 1 microwave 1 range 1 smoke detector washer/dryer
Valuation:
N/A
Permit #:
E201405129573
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Unit #504 - 5th floor: relocate kitchen fixtures & cabinets remodel kitchen & bathroom addition new bedroom & closets. upgrade ele & plumbing fixtures rerouting electrical & plumbing as nec maher - not req'd
Valuation:
$31,000
Permit #:
201504012501
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Remodel unit #205. relocate kitchen remodel whole unit.; no change of unit coun; upgrade of electrical and plumbing fixtures. rerouting of electrical & plumbing as needed
Valuation:
$10,000
Permit #:
201407252160
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
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Kwan Wo Ironworks Inc Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Kwan Wo Ironworks Inc License info
Verified License
| License # | 643621 |
| Status | Active |
| State | California |
| Type | Steel, Structural, General Building |
| Business Type | Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Kwan Wo Ironworks Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
97
BuildZoom Score
Bonded
| Bonded Agent | Hudson Insurance Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Redwood Fire & Casualty Insurance Co |
38
Permits
- Building permit records show that Kwan Wo Ironworks Inc has worked on 38 permitted projects.
Kwan Wo Ironworks Inc Employees
EM
Eric Kai Suen Mao
Rme
FK
Florence Yuen Shan Kong
Rmo/Ceo/Pres
KS
Kelvin Kinfun Shum
Ceo / President