Updated: Jun 05, 2026
Location and Projects
Address
1011 Hartz Way, Danville, CA, 94526
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Keystone Builder Construction
Keystone Builder at 1011 Hartz Way, Danville, CA 94526, held a General Contractor license (#653344) with the California contractors license board with an expiration date of 09-30-1994. We last verified the license was expired on 05-28-2026.
Their BuildZoom score is 0 because we haven’t been able to verify an active license. As a result, they’re not ranked in the top 50% of 336,931 California contractors.
If you’re thinking about hiring them, we recommend double-checking their license status with your local licensing authority. Alternatively, use our project planner to be easily matched to qualified, licensed professionals in your area.
Keystone Builder Services
Start a project today:
Custom Home Build
New Home Construction
Medium Multi-Family New Con...
Other Residential New Const...
Multi-Room Remodel
Kitchen Remodel
Bathroom Remodel
Basement Remodel
Medium Multi-Family Remodel...
Other Residential Remodel
Office Renovation
Restaurant Renovation
Retail Renovation
Other Commercial Renovation
Roofing
Hardwood Flooring
Carpets
Laminate Flooring
Other Flooring
Framing
Wood Fences
Backsplash and Countertops
Stonework
Tile Flooring
Other Stone and Tile
Drywall
Interior Plaster
Brick and Blockwork
Other Masonry
Foundations
Other Concrete
Demolition
Paving, Driveways, and Side...
Excavation and Grading
Other Site Work
Keystone Builder Contact Information
Phone Number: (925) 786-2555
Address: 1011 Hartz Way, Danville, CA 94526
This is a sample of this contractor's permits. Click here to access their complete permit history.
Bathroom remodel-replace bathtub & shower valve no changes
Valuation:
$9,500
Permit #:
B03-1567
Status:
canceled
Fee:
$212
Permit Type:
Alter/res
Building Type:
N/A
See description
Valuation:
$3,300
Permit #:
94-1758
Status:
N/A
Fee:
$67
Permit Type:
Alteration
Building Type:
N/A
(rbc) - building residential combo alteration- 1 & 2 unit residential (building)
2021-12-22
Kitchen remodel; no change to wall layout; new cabinets counter tops tile backsplash new lighting new sink new range vent alteration to (e) for new stove - permit includes mep's. 8/27/2021 revised scope: includes gas test
Valuation:
$25,000
Permit #:
RBC1804738
Status:
complete
Fee:
$1,985
Permit Type:
N/A
Building Type:
N/A
(rp) plumbing - 1 & 2 unit residential (building)
2019-01-17
Install (1) toilet (1) sink related to hall closet conversion to half-bath
Valuation:
N/A
Permit #:
RP1900142
Status:
expired
Fee:
$207
Permit Type:
N/A
Building Type:
N/A
(rm) - mechanical - 1 & 2 unit residential (building)
2019-01-17
Install (1) bathroom fan related to hall closet conversion to half-bath
Valuation:
N/A
Permit #:
RM1900174
Status:
expired
Fee:
$207
Permit Type:
N/A
Building Type:
N/A
(re) - electrical - 1 & 2 unit residential (building)
2019-01-17
Install (2) light fixtures (2) switches (1) gfi receptacle (1) bathroom fan related to hall closet conversion to half-bath
Valuation:
N/A
Permit #:
RE1900221
Status:
expired
Fee:
$207
Permit Type:
N/A
Building Type:
N/A
(re) - electrical - 1 & 2 unit residential (building)
2021-08-02
Electrical for bathroom remodel includes replacement of surrounding. no change to wall layout
Valuation:
N/A
Permit #:
RE1803111
Status:
final
Fee:
$207
Permit Type:
N/A
Building Type:
N/A
(rp) plumbing - 1 & 2 unit residential (building)
2021-08-02
Plumbing bathroom remodel includes replacement of surrounding. no change to wall layout
Valuation:
N/A
Permit #:
RP1802082
Status:
final
Fee:
$310
Permit Type:
N/A
Building Type:
N/A
Bathroom remodel includes replacement of surrounding. no change to wall layout
Valuation:
$15,000
Permit #:
RB1803435
Status:
final
Fee:
$1,510
Permit Type:
N/A
Building Type:
N/A
Keystone Builder Reviews
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Recent Buildzoom Projects
Keystone Builder License info
Inactive License
| License # | 653344 |
| Status | Inactive |
| State | California |
| Type | General Building |
| 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.
Check this license's status for Keystone Builder at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 646014 |
| Status | Inactive |
| State | California |
| Type | General Building |
| 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.
Check this license's status for Keystone Builder at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
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BuildZoom Score
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Bonded
| Bonded Agent | Hudson Insurance Company |
| Bond Value | $15,000 |
Keystone Builder Employees
WE
Wayne Brian Emmel
Owner
WE
Wayne Emmel
Owner