Updated: Jun 10, 2026
Location and Projects
Address
4743 S KNOX AVE, Chicago, IL, 60632
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Gehrett Plumbing Inc
Gehrett Plumbing Inc, 4743 S Knox Ave, Chicago, IL (Owned by: Brian Kennedy) holds a General Contractor (Class C) license and 31 other licenses according to the City of Chicago license board.
Their BuildZoom score of 110 ranks in the top 4% of 65,686 Illinois licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Gehrett Plumbing Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Gehrett Plumbing Inc Services
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Gehrett Plumbing Inc Contact Information
Phone Number: (773) 284-1141
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Address: 4743 S KNOX AVE, Chicago, IL 60632
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Gehrett Plumbing Inc Chicago
Quality
110
96th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Gehrett Plumbing Inc has a BuildZoom score of 110, which places them above 96% of 65,686 contractors in Illinois.
Activity
|
1 project
|
2026 |
|
31 projects
|
2025 |
|
29 projects
|
2024 |
|
47 projects
|
2023 |
Our building permit records indicate that Gehrett Plumbing Inc has worked on at least
108.0 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
|
33 projects
|
Commercial Renovations |
|
75 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that Gehrett Plumbing Inc mostly works on
plumbing project
and commercial renovation
projects.
Pricing
|
10 projects
|
< $5k |
|
1 project
|
$5k-$20k |
|
5 projects
|
$20k-$50k |
|
8 projects
|
$50k-$100k |
|
23 projects
|
$100k-$250k |
|
23 projects
|
$250k-$500k |
|
17 projects
|
$500k-$1mil |
|
21 projects
|
$1mil+ |
The typical size of their permits is approximately $285,050. 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.
This is a sample of this contractor's permits. Click here to access their complete permit history.
Self-cert 2019 cbrc: interior alterations in existing office building on the 32nd floor suite 3200 to buildout a single floor office tenant. to include upgrades to existing toilet rooms new single-use restrooms new partitions electrical ventilaton and plumbing work as per plans. (occupancy group b; type 1a construction)
Valuation:
$3,000,000
Permit #:
101069259
Status:
complete
Fee:
$6,698
Permit Type:
N/A
Building Type:
N/A
Self-cert 2019 cbrc: interior renovation of first-generation tenant space on level 46.work to include non-load bearing partitions ceilings floor/wall finishes hvac & electrical. no structural work and no change in use. (1a construction. b-business)
Valuation:
$1,000,000
Permit #:
101067662
Status:
issued
Fee:
$2,141
Permit Type:
N/A
Building Type:
N/A
Self-cert 2019 cbrc: interior tenant fit-out in existing office building on the 43rd floor for single floor office tenent to include new interior non-bearing partitions ceiling layouts finishes new mechanical new electrical work throughout new plubming work at restrooms pantry cafe and mother's room new fire alarm and security as per plans. (occupancy groug b; type 1a construction)
Valuation:
$2,165,000
Permit #:
101063840
Status:
complete
Fee:
$9,568
Permit Type:
N/A
Building Type:
N/A
*self certification 2019 cbrc*: interior building out of nexamp-suite 200/250 work includes interior partitions finishes electrical mechanical and plumbing. no structural work to be performed. no change in use b-business construction type 1a
Valuation:
$814,000
Permit #:
101066032
Status:
complete
Fee:
$3,024
Permit Type:
N/A
Building Type:
N/A
Self-cert 2019 cbrc. interior alteration of suite 1450. an existing commercial office space in a 30 story commercial building. no change in occupancy (occupancy group b; type 1a construction)
Valuation:
$439,915
Permit #:
101069422
Status:
complete
Fee:
$5,665
Permit Type:
N/A
Building Type:
N/A
Self cert 2019 cbrc: interior alterations to 12th & 14th floor offices. work to include demolish new partitions mechanical electrical and plumbing as per plans. b-business. 1a construction
Valuation:
$1,750,000
Permit #:
101065225
Status:
issued
Fee:
$7,128
Permit Type:
N/A
Building Type:
N/A
Self-cert 2019 cbrc: interior alteration to 11th floor office space in existing 45-story commercial office building (occupancy group b business existing type 1a construction)
Valuation:
$561,200
Permit #:
101069055
Status:
complete
Fee:
$5,096
Permit Type:
N/A
Building Type:
N/A
Self-crt 2019 cbrc- interior tenant build-out of 4 872 sf for spec suite office space including electrical plumbing and mechanical. (occupancy group b; type ia construction)
Valuation:
$389,760
Permit #:
101069686
Status:
issued
Fee:
$2,048
Permit Type:
N/A
Building Type:
N/A
** cbc 2019 ** ** self-cert permit ** interior renovation of existing tenant office suite on floor 14. renovation includes demolition of existing space in preparation for new interior partitions ceilings lighting and finishes as well as the reworking of hvac electrical plumbing sprinklers and fire alarm. current use: office. proposed use: office
Valuation:
$228,600
Permit #:
101072738
Status:
issued
Fee:
$3,161
Permit Type:
N/A
Building Type:
N/A
***self-cert permit*** interior renovation of existing tenant office suite on floor 14. renovation includes new interior partitions ceilings lighting and finishes as well as the reworking of hvac electrical sprinklers and fire alarm. current use: office. proposed use: office
Valuation:
$214,800
Permit #:
101073683
Status:
issued
Fee:
$2,975
Permit Type:
N/A
Building Type:
N/A
Self cert 2019 cbrc: interior alterations to existing office suite 1800. work to include new partitions mechanical electrical and plumbing as per plans. demolish under permit #101071507. b-business. 1a construction
Valuation:
$288,750
Permit #:
101072050
Status:
complete
Fee:
$3,973
Permit Type:
N/A
Building Type:
N/A
**self cert 2019 crbc**: interior alterations to the existing sute 1410. work includes interior partitions finishes plumbing electrical and mechanical no structural work to be performed. no change in use b-business construction type 1a
Valuation:
$250,000
Permit #:
101070807
Status:
issued
Fee:
$975
Permit Type:
N/A
Building Type:
N/A
Self-cert 2019 cbrc: commercial tenant improvement on 19th floor office space suite 1940. work to include minor demolition and construction of non-load bearing partitions ceilings finishes furniture equipment and associated mep work. no change in use. structural peer review (1a construction b-business use)
Valuation:
$118,848
Permit #:
101069827
Status:
issued
Fee:
$1,412
Permit Type:
N/A
Building Type:
N/A
Self-cert 2019 cbrc - interior buildout of 3 455 sqft for business offices restrooms and corridors on the 14th floor including alterations to existing ventilation plumbing and new electrical work. no change in occupancy or use. (occupancy group b; type ia construction)
Valuation:
$120,000
Permit #:
101065871
Status:
issued
Fee:
$1,474
Permit Type:
N/A
Building Type:
N/A
Self-cert 2019 cbcr - interior demolition of existing 14th floor office space - no new construction and no change in use. (occupancy group b; type 1a construction)
Valuation:
$282,000
Permit #:
101065706
Status:
complete
Fee:
$3,796
Permit Type:
N/A
Building Type:
N/A
Self-crt 2019 cbrc- interior alteration of 2 971 sf existing office space on the 9th floor including electrical plumbing and mechanical. no change in use or occupancy. (occupancy group b; type ia construction)
Valuation:
$193,115
Permit #:
101070055
Status:
complete
Fee:
$1,278
Permit Type:
N/A
Building Type:
N/A
** cbc 2022 ** ** self- cert permit ** interior renovation of existing office suite on floor 23. renovation includes demolition of existing space in preparation for new interior partitions ceilings lighting and finishes as well as the reworking of hvac electrical sprinklers and fire alarm. current use: office. proposed use: office
Valuation:
$104,850
Permit #:
101068587
Status:
issued
Fee:
$1,490
Permit Type:
N/A
Building Type:
N/A
Self cert 2019 cbrc: interior renovation and expansion to existing suite 3500. work to include demolish new partitions electrical plumbing and mechanical as per plans. b-business 1a construction
Valuation:
$1,300,000
Permit #:
101073885
Status:
issued
Fee:
$2,050
Permit Type:
N/A
Building Type:
N/A
Self-cert 2019 cbrc - tenant buildout of 15 033 sqft for business office on the 22nd floor including alterations to plumbing electrical and mechanical. (occupancy group b; type ia construction)
Valuation:
$910,000
Permit #:
101073286
Status:
issued
Fee:
$6,738
Permit Type:
N/A
Building Type:
N/A
Self-cert 2019 cbrc: interior renovation of existing tenant office suite on floor 51. renovation includes new interior partitions ceiling lighting and finishes as well as thereworking of hvac electrical plumbing sprinklers and fire alarm. occupancy group b. type 1a construction
Valuation:
$90,240
Permit #:
101065113
Status:
complete
Fee:
$1,293
Permit Type:
N/A
Building Type:
N/A
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Verified License
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Gehrett Plumbing Inc License info
Verified License
| License # | TGC04615 |
| Status | Active |
| City | City Of Chicago |
| Type | General Contractor (Class C) |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Gehrett Plumbing Inc at the City of Chicago Data Portal.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | BC15426 |
| Status | Active |
| City | City Of Chicago |
| Type | Plumbing Contractor |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Gehrett Plumbing Inc at the City of Chicago Data Portal.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | CL-25-19948 |
| Status | Active |
| Town | Orland Park |
| Type | Plumbing Contractor |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Gehrett Plumbing Inc at the Village of Orland Park Contractor License.
This is a sample of licensing data; click here to access a complete history.
Verified License
| Status | Active |
| County | Cook County |
| Type | Plumbing |
| Date Issued | 12-31-2025 |
- BuildZoom verified this license was active as of June 2026.
This is a sample of licensing data; click here to access a complete history.
License Not Required
| Status | Not Required |
- BuildZoom verified in October, 2018 that this contractor does not need a license to be a plumber in Illinois.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | CL-18-19948 G |
| Status | Active |
| Town | Orland Park |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2018. Check the current license status of Gehrett Plumbing Inc with the Village of Orland Park Contractor License
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | CL-18-24679 G |
| Status | Active |
| Town | Orland Park |
| Type | General Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2018. Check the current license status of Gehrett Plumbing Inc with the Village of Orland Park Contractor License
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | CL-16-19948 |
| Status | Active |
| Town | Orland Park |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2016. Check the current license status of Gehrett Plumbing Inc with the Village of Orland Park Contractor License
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 14-00004059 |
| Status | Active |
| City | Aurora |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2015. Check the current license status of Gehrett Plumbing Inc with the The City of Aurora, IL
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | CR00638 |
| Status | Active |
| County | Dupage County |
| Type | Sub Contractor (Per Trade) |
- When BuildZoom last verified this license, it had an expiration date of December, 2015. Check the current license status of Gehrett Plumbing Inc with the County of DuPage
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | CL-15-19948 |
| Status | Active |
| Town | Orland Park |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2015. Check the current license status of Gehrett Plumbing Inc with the Village of Orland Park Contractor License
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 2012-CR00638 |
| Status | Active |
| County | Dupage County |
| Type | Sub Contractor (Per Trade) |
- When BuildZoom last verified this license, it had an expiration date of December, 2015. Check the current license status of Gehrett Plumbing Inc with the County of DuPage
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CR00638 |
| Status | Inactive |
| County | Dupage County |
| Type | Plumbing |
- According to the County of Dupage Contractor Registration Information, 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 Gehrett Plumbing Inc at the County of Dupage Contractor Registration Information.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CR00638 |
| Status | Inactive |
| County | Dupage County |
| Type | Carpentry |
- According to the County of Dupage Contractor Registration Information, 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 Gehrett Plumbing Inc at the County of Dupage Contractor Registration Information.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CL-24-19948 |
| Status | Inactive |
| Town | Orland Park |
| Type | Plumbing Contractor |
- According to the Village of Orland Park Contractor License, 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 Gehrett Plumbing Inc at the Village of Orland Park Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CR00638 |
| Status | Inactive |
| County | Dupage County |
| Type | Sub Contractor, Plumbing |
- According to the County of Dupage Contractor Registration Information, 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 Gehrett Plumbing Inc at the County of Dupage Contractor Registration Information.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CL-23-19948 |
| Status | Inactive |
| Town | Orland Park |
| Type | Plumbing Contractor |
- According to the Village of Orland Park Contractor License, 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 Gehrett Plumbing Inc at the Village of Orland Park Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CL-22-19948 |
| Status | Inactive |
| Town | Orland Park |
| Type | Plumbing Contractor |
- According to the Village of Orland Park Contractor License, 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 Gehrett Plumbing Inc at the Village of Orland Park Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CL-20-19948 |
| Status | Inactive |
| Town | Orland Park |
| Type | Plumbing Contractor |
- According to the Village of Orland Park Contractor License, 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 Gehrett Plumbing Inc at the Village of Orland Park Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CL-19-19948 |
| Status | Inactive |
| Town | Orland Park |
| Type | Plumbing Contractor |
- According to the Village of Orland Park Contractor License, 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 Gehrett Plumbing Inc at the Village of Orland Park Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| Town | Bartlett |
| Type | Carpentry |
- According to the Contractors Licensed in Bartlett, 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 # | CL-18-19948 |
| Status | Inactive |
| Town | Orland Park |
| Type | Plumbing Contractor |
- According to the Village of Orland Park Contractor License, 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 Gehrett Plumbing Inc at the Village of Orland Park Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CL-18-24679 |
| Status | Inactive |
| Town | Orland Park |
| Type | General Contractor |
- According to the Village of Orland Park Contractor License, 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 Gehrett Plumbing Inc at the Village of Orland Park Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| County | Cook County |
| Type | Demolition |
- According to the Cook County Department of Building and Zoning, 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 # | CL-17-24679 |
| Status | Inactive |
| Town | Orland Park |
| Type | General Contractor |
- According to the Village of Orland Park Contractor License, 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 Gehrett Plumbing Inc at the Village of Orland Park Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| Status | Inactive |
| County | Cook County |
| Type | Drywall |
- According to the Cook County Department of Building and Zoning, 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
| Status | Inactive |
| County | Cook County |
| Type | Carpentry |
- According to the Cook County Department of Building and Zoning, 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
| Status | Inactive |
| County | Cook County |
| Type | Insulation |
- According to the Cook County Department of Building and Zoning, 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
| Status | Inactive |
| City | City Of Chicago |
| Type | Bonded Contractor |
- According to the City of Chicago Data Portal, 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
| Status | Inactive |
| City | City Of Chicago |
| Type | C $5,000,000 Project Ceiling |
- According to the City of Chicago Data Portal, 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 # | 055-000178 |
| Status | Inactive |
| City | Evanston |
| Type | Plumbing |
- According to the City of Evanston Building and Inspection Services, 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 Gehrett Plumbing Inc at the City of Evanston Building and Inspection Services.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | CL-17-19948 |
| Status | Inactive |
| Town | Orland Park |
| Type | Plumbing Contractor |
- According to the Village of Orland Park Contractor License, 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 Gehrett Plumbing Inc at the Village of Orland Park Contractor License.
This is a sample of licensing data; click here to access a complete history.
110
BuildZoom Score
418
Permits
- Building permit records show that Gehrett Plumbing Inc has worked on 418 permitted projects.
Gehrett Plumbing Inc Employees
BK
Brian Kennedy
Owner