Updated: May 12, 2026
Location
Address
955 S Mccarran Blvd, Sparks, NV, 89431
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Eco Windows LLC
Eco Windows LLC, 955 S Mccarran Blvd, Sparks, NV (Employees: Joanna Masznicz, Masznicz, Roman Slawomir, and Slawomir Masznicz) holds a Glazing license and 3 other licenses according to the California license board.
Their BuildZoom score of 98 ranks in the top 16% of 21,879 Nevada licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Eco Windows LLC, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Eco Windows LLC Contact Information
Phone Number: (775) 636-8138
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Address: 955 S Mccarran Blvd, Sparks, NV 89431
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Eco Windows LLC License info
Verified License
| License # | 976162 |
| Status | Active |
| State | California |
| Type | Glazing |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Eco Windows LLC at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | ECOWIWL900JK |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Eco Windows LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 75082 |
| Status | Active |
| State | Nevada |
| Type | C-8 - Glass And Glazing |
| Business Type | Limited Liability Company |
- When BuildZoom last verified this license, it had an expiration date of August, 2014. Check the current license status of Eco Windows LLC with the Nevada State Contractors Board
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 0075082 |
| Status | Inactive |
| State | Nevada |
| Type | C 8 Glass And Glazing |
| Business Type | Limited Liability Company |
- According to the Nevada State Contractors Board, 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 Eco Windows LLC at the Nevada State Contractors Board.
This is a sample of licensing data; click here to access a complete history.
98
BuildZoom Score
Insured
| Insurer | Sentinel Insurance Co Ltd |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Platte River Insurance Company |
| Bond Value | $2,000 |
Insured
| Workers Comp Provider | Workers' Compensation History |
Eco Windows LLC Employees
JM
Joanna Masznicz
Partner/Member
MS
Masznicz, Roman Slawomir
Manager Qualified Individual
SM
Slawomir Masznicz
Partner/Member
SM
Slawomir Roman Masznicz
Sole Owner