Updated: May 29, 2026
Location and Projects
Address
642 HARMONY DRIVE, Hayward, CA, 94541
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Gb Construction
Gb Construction, 642 Harmony Dr, Hayward, CA (Employee: Juan Carlos Guerrero) holds a General Building license according to the California license board.
Their BuildZoom score of 94 ranks in the top 24% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Gb Construction, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Gb Construction Services
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Gb Construction Contact Information
Phone Number: (510) 418-0331
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Address: 642 HARMONY DRIVE, Hayward, CA 94541
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Remodel to addition new bedroom. remodel kitchen and bathroom install replacement windows & a new furnace
Valuation:
$125,000
Permit #:
B2021-01455
Status:
issued
Fee:
$6,687
Permit Type:
N/A
Building Type:
N/A
Remove stucco at front of house repair dry rot and install new stucco per nov
Valuation:
$12,000
Permit #:
B2019-01925
Status:
final
Fee:
$716
Permit Type:
N/A
Building Type:
N/A
New drive and widen existing driveway per approved plans to city standard. do not cut into pavement unless and until ready to complete project if working within 25 feet of a monument you must comply with state law 8771 contact the inspector prior to starting excavation: minimum $5 800.00 fine for non-compliance comply with all terms of city of oakland public works standards street exc... see more
Valuation:
N/A
Permit #:
CGS16197
Status:
final
Fee:
$474
Permit Type:
N/A
Building Type:
N/A
If working within 25 feet of a monument you must comply with state law 8771 contact the inspector prior to starting excavation: minimum $5, 800.00 fine for non-compliance comply with all terms of city of oakland public works standards street excavation rules revised march 2015 and city council ordinance no. 13300 c.m.s. five day prior notice required for work lasting five days or less... see more
Valuation:
N/A
Permit #:
CGS1901389
Status:
final
Fee:
$535
Permit Type:
N/A
Building Type:
N/A
Replace windows & doors at rear wall of single family dwelling including relocating 2nd floor door opening & seismic strengthening of rear wall per engineered plan
Valuation:
$45,000
Permit #:
RB1602788
Status:
final
Fee:
$1,466
Permit Type:
N/A
Building Type:
N/A
Remodel kitchen relocate half bath/laundry addition new door and building new deck at rear yard
Valuation:
$130,000
Permit #:
B2021-00871
Status:
issued
Fee:
$6,789
Permit Type:
N/A
Building Type:
N/A
Addition to home for 94 sq ft office addition and 30 sq ft laundry room addition
Valuation:
N/A
Permit #:
BIAD14-009419
Status:
final
Fee:
$1,000
Permit Type:
N/A
Building Type:
N/A
Interior kitchen & bathroom remodel of existing single family dwelling to include replacement of 2 windows at right side insert only and vinyl ok. voluntary seismic strengthening per engineered plans drx170365
Valuation:
$40,000
Permit #:
RB1700915
Status:
expired
Fee:
$2,435
Permit Type:
N/A
Building Type:
N/A
Plumbing interior kitchen & bathroom remodel of existing single family dwelling
Valuation:
N/A
Permit #:
RP1701022
Status:
expired
Fee:
$319
Permit Type:
N/A
Building Type:
N/A
(rm) - mechanical - 1 & 2 unit residential (building)
2017-04-05
Mechanical interior kitchen & bathroom remodel of existing single family dwelling
Valuation:
N/A
Permit #:
RM1700722
Status:
expired
Fee:
$207
Permit Type:
N/A
Building Type:
N/A
(re) - electrical - 1 & 2 unit residential (building)
2017-04-05
Electrical interior kitchen & bathroom remodel
Valuation:
N/A
Permit #:
RE1701208
Status:
expired
Fee:
$240
Permit Type:
N/A
Building Type:
N/A
(rm) - mechanical - 1 & 2 unit residential (building)
2017-04-05
Mechanical interior kitchen & bathroom remodel of existing single family dwelling
Valuation:
N/A
Permit #:
RM1700722
Status:
expired
Fee:
$207
Permit Type:
N/A
Building Type:
N/A
(re) - electrical - 1 & 2 unit residential (building)
2017-04-05
Electrical interior kitchen & bathroom remodel
Valuation:
N/A
Permit #:
RE1701208
Status:
expired
Fee:
$240
Permit Type:
N/A
Building Type:
N/A
Plumbing interior kitchen & bathroom remodel of existing single family dwelling
Valuation:
N/A
Permit #:
RP1701022
Status:
expired
Fee:
$319
Permit Type:
N/A
Building Type:
N/A
Title 24 electrical and mechanical for pa 2016-1013-0244
Valuation:
$35,000
Permit #:
201610200846
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
15 - retail sales
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Verified License
BuildZoom confirmed this contractor's license
Gb Construction License info
Verified License
| License # | 976597 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Gb Construction at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
94
BuildZoom Score
Bonded
| Bonded Agent | This License Filed A Contractor's Bond With |
| Bond Value | $25,000 |
Insured
| Workers Comp Provider | Norguard Insurance Company |
8
Permits
- Building permit records show that Gb Construction has worked on 8 permitted projects.
Gb Construction Employees
JG
Juan Carlos Guerrero
Sole Owner