Updated: May 07, 2026
Location and Projects
Address
450 NP St, Livermore, CA, 94551
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Slate Mechanical
Slate Mechanical at 450 NP St, Livermore, CA 94551, held a HVAC/Mechanical Contractor license (#929276) with the California contractors license board with an expiration date of 08-31-2023. We last verified the license was expired on 05-06-2026.
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.
Slate Mechanical Contact Information
Phone Number: (510) 331-0734
Address: 450 NP St, Livermore, CA 94551
This is a sample of this contractor's permits. Click here to access their complete permit history.
Remove and recycle old equipment york 5 ton 100, 000 btu 2 stage 96% furnace york 5 ton 14 seer condensing unit coil 5 ton line set 5/8x7/8x50 foot ecobee smart wifi thermostat (3) 3 zone control board warranty: 10 year limited parts 10 year compressor 10 year parts and 1 year limited labor remove and replace ductwork place condensing unit under window addition 3 registers (at techs d... see more
Valuation:
$20,200
Permit #:
MW22-0087
Status:
final
Fee:
$610
Permit Type:
N/A
Building Type:
N/A
Install new ductless mini split hspf8.7/18k/1.8k 36k btu/16 seer - no ductwork
Valuation:
$12,800
Permit #:
B21-1998
Status:
expired
Fee:
$632
Permit Type:
N/A
Building Type:
N/A
Install a dedicated gas line for existing rooftop unit (106 1 75kbtu's galv.) (gas was never installed for heating unit)
Valuation:
$1,000
Permit #:
B19-1435
Status:
final
Fee:
$95
Permit Type:
N/A
Building Type:
N/A
Replace roof package unit furnace 80% and air conditioning 14 seer
Valuation:
$6,000
Permit #:
F200338
Status:
final
Fee:
$271
Permit Type:
Add/alt single fa...
Building Type:
N/A
Replace furnace 80k btu - 11 new ducts - rerun gas lines - new 4 ton air conditioning in west sidyard
Valuation:
$17,500
Permit #:
B18-1446
Status:
final
Fee:
$701
Permit Type:
N/A
Building Type:
N/A
Install air conditioning replacement 4 ton same location
Valuation:
N/A
Permit #:
BIM19-005151
Status:
final
Fee:
$204
Permit Type:
N/A
Building Type:
N/A
Replace furnace (95% afue) coil and all duct work
Valuation:
$16,000
Permit #:
F180401
Status:
final
Fee:
$271
Permit Type:
Add/alt single fa...
Building Type:
N/A
Furnace (garage) ductwork and air conditioning (yard) change out like for like 80kbtu's 80% afue 4 ton 14 seer
Valuation:
$15,000
Permit #:
B20-0159
Status:
issued
Fee:
$200
Permit Type:
N/A
Building Type:
N/A
Residential hvac - heating ventilation air conditioning
2016-09-09
Replace furnace and all ducting (80%) tankless water heater
Valuation:
$1,500
Permit #:
M16-019723
Status:
final
Fee:
$623
Permit Type:
N/A
Building Type:
N/A
Hvac replacement
Valuation:
$12,000
Permit #:
M170651
Status:
final
Fee:
$416
Permit Type:
N/A
Building Type:
N/A
Residential mechanical electrical plumbing permit
2018-12-14
Replace furnace (80% afue)(same location)
Valuation:
$4,000
Permit #:
BLDG-2018-02478
Status:
final
Fee:
$0
Permit Type:
N/A
Building Type:
N/A
Dedicated gas line for fireplace 70 linear feet 41kbtu and 3/4dia. pipe
Valuation:
$10,000
Permit #:
B16-1930
Status:
final
Fee:
$89
Permit Type:
N/A
Building Type:
N/A
Replace (8) existing rooftop hvac units - same size and weight (all equipment must be screened by (e) roof parapet)
Valuation:
$67,000
Permit #:
CM190050
Status:
expired
Fee:
$1,626
Permit Type:
Misc
Building Type:
N/A
Replace hvac package unit on roof with new - same location and new is lighter in weight
Valuation:
N/A
Permit #:
BIMC18-013124
Status:
expired
Fee:
$204
Permit Type:
N/A
Building Type:
N/A
Install 3 new hvac roof top units all screened by existing parapet
Valuation:
$23,000
Permit #:
CM190069
Status:
expired
Fee:
$1,090
Permit Type:
Misc
Building Type:
N/A
Replace furnace with 80% afue and air conditioning with 14 seer coil and replace ductwork
Valuation:
$13,000
Permit #:
F190116
Status:
expired
Fee:
$271
Permit Type:
Add/alt single fa...
Building Type:
N/A
Slate Mechanical Reviews
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Slate Mechanical License info
Inactive License
| License # | 929276 |
| Status | Inactive |
| State | California |
| Type | Low Voltage Systems |
| 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 Slate Mechanical 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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Bonded
| Bonded Agent | Western Surety Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Norguard Insurance Company |
15
Permits
- Building permit records show that Slate Mechanical has worked on 15 permitted projects.
Slate Mechanical Employees
ND
Nicholas Andrew Daniels
Owner