Updated: May 26, 2026
Location and Projects
Address
3297 Walnut Street, Boulder, CO, 80301
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Simple Solar Systems
Simple Solar Systems at 3297 Walnut Street, Boulder, CO 80301, held a Solar Contractor license (#7283) with the Colorado contractors license board with an expiration date of 09-30-2011. We last verified the license was expired on 05-25-2026.
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 55,949 Colorado 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.
Simple Solar Systems Contact Information
Phone Number: (303) 541-9852
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Address: 3297 Walnut Street, Boulder, CO 80301
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Install a 4.32 kw grid tied flush mount p.v. system
Valuation:
N/A
Permit #:
BP-09-00867
Status:
final
Fee:
N/A
Permit Type:
Residential
Building Type:
N/A
Solar photovoltaic systems
Valuation:
N/A
Permit #:
BP-09-00640
Status:
final
Fee:
N/A
Permit Type:
Residential
Building Type:
N/A
Install new ground mounted 10.120 kw grid tied residential photovoltaic system - 44 230w solar modules mounted on 3- 8 steel poles - electric included - ref: bcr08-00308 dwelling
Valuation:
$88,283
Permit #:
BCR10-00453
Status:
Finaled
Fee:
$300
Permit Type:
N/A
Building Type:
N/A
Install 4.95 kw photovoltaic system on roof of existing barn built in 2004 - 22-225w flush-mounted solar modules grid tied into existing dwelling built 1979 - electric included - ref:bcn-040402-1080 sf pole barn
Valuation:
$26,931
Permit #:
BCR10-00734
Status:
final
Fee:
$300
Permit Type:
N/A
Building Type:
N/A
Installation of a 5.06 kw flush-mount grid tie photovoltaic system.array to remain below ridge, inside of rakes and above eave. see engineer''s letter and unirac literature for specific information.
Valuation:
$0
Permit #:
PMT2011-01352
Status:
Completed
Fee:
N/A
Permit Type:
Residential
Building Type:
Single Family Det...
Installation of a 3.22 kw flush-mount grid tie photovoltaic system.array to remain below ridge, inside of rakes and above eave. see engineer''s letter and unirac literature for specific information.
Valuation:
$0
Permit #:
PMT2011-01353
Status:
Completed
Fee:
N/A
Permit Type:
Residential
Building Type:
Single Family Det...
Installation of .86 kw photovoltaic solar energy system on pole at gate shack. pole and shack, including structure, approved through pmt2010-02840, this permit is solar energy system install only.
Valuation:
$0
Permit #:
PMT2010-03841
Status:
Completed
Fee:
N/A
Permit Type:
Not Stated
Building Type:
Existing
Install of a 4.14 kw roof mounted grid-tied flush mount p
Valuation:
N/A
Permit #:
08-4334
Status:
final
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Pv installation on four-plex for habitat for humanity. flush mounted, grid-tied, and 1.575 kw. (identical permit applications for 4549, 4555, 4561, 4567 sunnyside)
Valuation:
$0
Permit #:
PMT2010-03797
Status:
Completed
Fee:
N/A
Permit Type:
Residential
Building Type:
Multifamily Dwell...
Pv installation on four-plex for habitat for humanity. flush mounted, grid-tied, and 1.575 kw. (identical permit applications for 4549, 4555, 4561, 4567 sunnyside)
Valuation:
$0
Permit #:
PMT2010-03798
Status:
Issued
Fee:
N/A
Permit Type:
Residential
Building Type:
Multifamily Dwell...
Pv installation on four-plex for habitat for humanity. flush mounted, grid-tied, and 1.575 kw. (identical permit applications for 4549, 4555, 4561, 4567 sunnyside)
Valuation:
$0
Permit #:
PMT2010-03799
Status:
Completed
Fee:
N/A
Permit Type:
Residential
Building Type:
Multifamily Dwell...
Pv installation on four-plex for habitat for humanity. flush mounted, grid-tied, and 1.575 kw. (identical permit applications for 4549, 4555, 4561, 4567 sunnyside)
Valuation:
$0
Permit #:
PMT2010-03800
Status:
Completed
Fee:
N/A
Permit Type:
Residential
Building Type:
Multifamily Dwell...
Addition of 12 modules (flush mounted 12.225kw) to existing roof mounted grid tied photovoltaic system on barn with back-up batteries
Valuation:
$20,640
Permit #:
BP-11-0097
Status:
complete
Fee:
$452
Permit Type:
N/A
Building Type:
N/A
Installation of a 4.55 kw solar array. flush mounted and grid-tied to be used with the unirac sunframe solarmount
Valuation:
N/A
Permit #:
PMT2009-01937-ELE
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Installation of 10.12 kw solar array tilted at 10 degrees system height does not exceed 25 and grid tied
Valuation:
N/A
Permit #:
PMT2010-05144-ELE
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Addition of 5 modules (1.15kw ) to existing ground mounted solar photovoltaic array structure bp-08-1133 (sprw-11-0004)
Valuation:
$9,200
Permit #:
BP-11-0098
Status:
complete
Fee:
$423
Permit Type:
N/A
Building Type:
N/A
Solar photovoltaic system 9.87kw flush roof mounted grid tied on residence
Valuation:
$78,960
Permit #:
BP-11-0063
Status:
complete
Fee:
$597
Permit Type:
N/A
Building Type:
N/A
Installation of a 9.9 kw grid-tie photovoltaic system on the municipal building see adr2008-00211 and his2008-00223 for additional information
Valuation:
N/A
Permit #:
PMT2008-04950-ELE
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Installation of a flush-mount grid tie 6.2 kw photovoltaic system -- panels not to protrude above existing ridge or outside rake edges of roof.
Valuation:
$0
Permit #:
PMT2009-03227
Status:
Completed
Fee:
N/A
Permit Type:
Residential
Building Type:
Single Family Det...
Solar photovoltaic system 36kw gound mounted for house (re: bp-08-1438 ep-09-0007)
Valuation:
$288,000
Permit #:
BP-08-1782
Status:
complete
Fee:
$1,264
Permit Type:
N/A
Building Type:
N/A
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Simple Solar Systems License info
Inactive License
| License # | 7283 |
| Status | Inactive |
| State | Colorado |
| Type | Electrical Contractor |
- According to the Colorado Division of Professions and Occupations, 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 Simple Solar Systems at the Colorado Division of Professions and Occupations.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | LIC-0008687-ELEC |
| Status | Inactive |
| City | Boulder |
| Type | Electrical |
| Class | Electrical |
- According to the Boulder Licensing 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 Simple Solar Systems at the Boulder Licensing Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 080630007 |
| Status | Inactive |
| City | Westminster |
| Type | General Contractor |
- According to the City of Westminster, Colorado, 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 Simple Solar Systems at the City of Westminster, Colorado.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| City | Denver |
- According to the City and County of Denver Community Planning and Development, 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.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | C010-0037 |
| Status | Inactive |
| County | Clear Creek County |
| Type | Contractor |
- According to the Clear Creek County, CO, 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 Simple Solar Systems at the Clear Creek County, CO.
This is a sample of licensing data; click here to access a complete history.
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BuildZoom Score
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176
Permits
- Building permit records show that Simple Solar Systems has worked on 176 permitted projects.
Simple Solar Systems Employees
JC
Joe Callahan
Contact
JC
Joseph Callahan
SL
Simple Solar Systems Llc