Updated: Jun 01, 2026
Location and Projects
Address
21240 JAPATUL RD, Alpine, CA, 91901
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DELTA ENERGY DESIGNS SYSTEMS HVAC/Mechanical Contractor
DELTA ENERGY DESIGNS SYSTEMS INC, 21240 Japatul Rd, Alpine, CA (Employees: Eugenia Rae Nielsen, Robert Ashman Knapp, and Robert Michael Knapp) holds a Warm Air Heating, Ventilating And Air Conditioning, Sheet Metal license according to the California license board.
Their BuildZoom score of 78 does not rank in the top 50% of California contractors.
Their license was verified as active when we last checked. If you are thinking of hiring DELTA ENERGY DESIGNS SYSTEMS INC, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
DELTA ENERGY DESIGNS SYSTEMS INC Services
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DELTA ENERGY DESIGNS SYSTEMS INC Contact Information
Phone Number: (619) 579-9700
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Address: 21240 JAPATUL RD, Alpine, CA 91901
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DELTA ENERGY DESIGNS SYSTEMS INC Reviews
1 out of 5 stars, based on
1
review
-
By James K.August 31, 2016
Building Permits by DELTA ENERGY DESIGNS SYSTEMS INC
This is a sample of this contractor's permits. Click here to access their complete permit history.
Install gas tank water heater-change out-same location e-permit
Valuation:
N/A
Permit #:
1891775
Status:
complete
Fee:
$135
Permit Type:
N/A
Building Type:
N/A
Supply and install new rooftop elevator equipment air conditioning system. 3- cooling only 5-ton split systems with new supply and return air ductwork. providing 230v to new eqip. reference permit # 07stp1405
Valuation:
$7,000
Permit #:
08CBP0081
Status:
FINAL
Fee:
$375
Permit Type:
N/A
Building Type:
N/A
Electrical and mechanical permit to install 2 ton heat pump and (3) handlers. new 220v electric line condenser for single family residence
Valuation:
N/A
Permit #:
1755293
Status:
complete
Fee:
$426
Permit Type:
N/A
Building Type:
N/A
Supply and install new rooftop elevator equipment air conditioning system. 3- cooling only 5-ton split systems with new supply and return air ductwork
Valuation:
$37,500
Permit #:
07STP1405
Status:
WITHDRAW
Fee:
$147
Permit Type:
N/A
Building Type:
N/A
E permit plumbing replace water heater like for like same location
Valuation:
N/A
Permit #:
1758642
Status:
issued
Fee:
$169
Permit Type:
N/A
Building Type:
N/A
E permit plumbing replace water heater like for like same location
Valuation:
N/A
Permit #:
1758629
Status:
complete
Fee:
$169
Permit Type:
N/A
Building Type:
N/A
Epermit --- replace water heater like for like in same location
Valuation:
N/A
Permit #:
1755592
Status:
issued
Fee:
$169
Permit Type:
N/A
Building Type:
N/A
Plumbing- replace water heater like for like same location
Valuation:
N/A
Permit #:
1758680
Status:
complete
Fee:
$169
Permit Type:
N/A
Building Type:
N/A
Electrical and mechanical permit to install 2 ton heat pump and (3) handlers. new 220v electric line condenser for single family residence
Valuation:
N/A
Permit #:
1755292
Status:
issued
Fee:
$426
Permit Type:
N/A
Building Type:
N/A
Re-plumbing all water lines with type l copper
Valuation:
N/A
Permit #:
1757488
Status:
complete
Fee:
$156
Permit Type:
N/A
Building Type:
N/A
New 75 gal water heater same location
Valuation:
N/A
Permit #:
14-0040
Status:
issued
Fee:
$91
Permit Type:
N/A
Building Type:
N/A
Epermit ---16607---replace water heater
Valuation:
N/A
Permit #:
1218258
Status:
complete
Fee:
$165
Permit Type:
N/A
Building Type:
N/A
E permit - replace 50 gallon gas - 22165
Valuation:
N/A
Permit #:
1218970
Status:
complete
Fee:
$165
Permit Type:
N/A
Building Type:
N/A
E permit - replace 50 gallon gas - 22792
Valuation:
N/A
Permit #:
1219280
Status:
complete
Fee:
$165
Permit Type:
N/A
Building Type:
N/A
Ep - replace 40 gallon gas.*23388
Valuation:
N/A
Permit #:
1219335
Status:
complete
Fee:
$165
Permit Type:
N/A
Building Type:
N/A
Ep - replace 40 gallon gas.*24207
Valuation:
N/A
Permit #:
1219345
Status:
complete
Fee:
$165
Permit Type:
N/A
Building Type:
N/A
75 gal water heater change out
Valuation:
N/A
Permit #:
14-0041
Status:
final
Fee:
$91
Permit Type:
N/A
Building Type:
N/A
Water heater
Valuation:
N/A
Permit #:
14-0039
Status:
issued
Fee:
$91
Permit Type:
N/A
Building Type:
N/A
Furnace change out
Valuation:
N/A
Permit #:
14-0038
Status:
final
Fee:
$91
Permit Type:
Furnace
Building Type:
N/A
Roof facade 7/2014
Valuation:
N/A
Permit #:
72567
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
DELTA ENERGY DESIGNS SYSTEMS INC License info
Verified License
| License # | 326622 |
| Status | Active |
| State | California |
| Type | Warm Air Heating, Ventilating And Air Conditioning, Sheet Metal |
| Business Type | Corporation |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for DELTA ENERGY DESIGNS SYSTEMS INC at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
78
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Preferred Employers Insurance Company |
26
Permits
- Building permit records show that DELTA ENERGY DESIGNS SYSTEMS INC has worked on 26 permitted projects.
DELTA ENERGY DESIGNS SYSTEMS INC Employees
EN
Eugenia Rae Nielsen
Officer
RK
Robert Ashman Knapp
Officer
RK
Robert Michael Knapp
Rmo / Ceo / Pres
Delta Mechanical installed a toilet that was purchased from Home Depot. The tank had a crack from the trip lever to the bottom of the tank. When the installer left, the floor was covered in water. We tried to get delta to come back and replace the tank that Home Depot had pulled from another unit in stock. That is when the real problems started. In my life, I was never treated as rudely and unprofessionally as I was by their customer service reps. My calls went unanswered and when I talked to someone I was called a liar. I would tell everyone that I know not to deal with theses people. I finally hired a handyman to come and install new tank as we were without a toilet for 6 days.