Updated: Jul 13, 2026
Location and Projects
Address
43 B EAST MAIN ST, Los Gatos, CA, 95030
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Sierra Weatherization Company Construction
Serving homeowners across the San Francisco Bay Area, Sierra Weatherization Company Inc specializes in energy efficiency upgrades and home weatherization services. With 17 years of experience, the company focuses on improving residential comfort and reducing energy consumption through targeted solutions such as insulation, air sealing, and moisture control. Based in Los Gatos, Sierra Weatherization addresses the unique climate needs of Bay Area properties, helping clients achieve significant utility savings and a healthier indoor environment. The company’s team applies proven methods to enhance attic and wall insulation and to seal air leaks around windows, doors, and ducts. Sierra Weatherization Company Inc emphasizes tailored solutions for each home, ensuring code compliance and integration with local building standards throughout every project.
Sierra Weatherization Company Inc Services
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Sierra Weatherization Company Inc Contact Information
Phone Number: (408) 609-2761
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Address: 43 B EAST MAIN ST, Los Gatos, CA 95030
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Sierra Weatherization Company Inc Los Gatos
Quality
99
85th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Sierra Weatherization Company Inc has a BuildZoom score of 99, which places them above 85% of 336,931 contractors in California.
Activity
|
42 projects
|
2025 |
|
37 projects
|
2024 |
|
16 projects
|
2023 |
Our building permit records indicate that Sierra Weatherization Company Inc has worked on at least
95.0 projects 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.
Experience
|
62 projects
|
Kitchen remodels |
Analyzing permits over the last 4 years shows that Sierra Weatherization Company Inc mostly works on
kitchen remodel
projects.
Pricing
|
10 projects
|
< $5k |
The typical size of their permits is approximately $1,500. This graph shows the distribution of these job values.
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 Sierra Weatherization Company Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Remove and replace existing water heater in same location (outside closet)
Valuation:
N/A
Permit #:
DEV25-0578
Status:
issued
Fee:
$228
Permit Type:
N/A
Building Type:
N/A
Replace like for like existing forced air furnace with new forced air furnace
Valuation:
N/A
Permit #:
DEV25-0577
Status:
issued
Fee:
$228
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 102919 RS
Status:
issued
Fee:
N/A
Permit Type:
Single-family
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 101420 MF
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 100893 RS
Status:
final
Fee:
N/A
Permit Type:
Single-family
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 098425 RS
Status:
issued
Fee:
N/A
Permit Type:
Single-family
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 096631 RS
Status:
final
Fee:
N/A
Permit Type:
Single-family
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 094322 MF
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 094339 MF
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 094333 MF
Status:
issued
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 094168 RS
Status:
final
Fee:
N/A
Permit Type:
Single-family
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 093499 MF
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 093492 MF
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 093488 MF
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 093501 MF
Status:
final
Fee:
N/A
Permit Type:
Apartment
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 092129 RS
Status:
final
Fee:
N/A
Permit Type:
Single-family
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 090418 RS
Status:
final
Fee:
N/A
Permit Type:
Single-family
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 089387 RS
Status:
final
Fee:
N/A
Permit Type:
Single-family
Building Type:
N/A
No Description Available
Valuation:
N/A
Permit #:
2025 089394 RS
Status:
final
Fee:
N/A
Permit Type:
Single-family
Building Type:
N/A
New forced air furnace
Valuation:
N/A
Permit #:
DEV24-2867
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Sierra Weatherization Company Inc Reviews
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Verified License
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Sierra Weatherization Company Inc License info
Verified License
| License # | 524934 |
| Status | Active |
| State | California |
| Type | General Building, Warm Air Heating, Ventilating And Air Conditioning, Plumbing |
| Business Type | Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Sierra Weatherization Company Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | NAT-41655-3 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Corporation |
- According to the United States Environmental Protection Agency, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Sierra Weatherization Company Inc at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | NAT-41655-2 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Corporation |
- According to the United States Environmental Protection Agency, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Sierra Weatherization Company Inc at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
99
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Insurance Company Of The West |
97
Permits
- Building permit records show that Sierra Weatherization Company Inc has worked on 97 permitted projects.
Sierra Weatherization Company Inc Employees
AD
Amy Lou Diffenderfer
Officer
AC
Antonio Garcia Cruz
Rmo
BP
Brian Van Phuong
Rmo
GE
Gary Ray Elliott
Rmo
GM
Glen Harder De Maria
Rmo
PH
Peter Reed Hofmann
Ceo / President
SV
Saul Alejandro Salgado Valenzuela
Rmo
SO
Steven Frank Ortiz
Rmo