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Stephen L. Knowles Architect
Stephen L. Knowles, (Owned by: Knowles, Stephen L) holds a Plumbing Contractor license and 21 other licenses according to the Ohio Professional license board.
Their BuildZoom score of 99 ranks in the top 15% of 52,717 Ohio licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Stephen L. Knowles, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Stephen L. Knowles Services
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Stephen L. Knowles
Quality
99
85th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Stephen L. Knowles has a BuildZoom score of 99, which places them above 85% of 52,717 contractors in Ohio.
Activity
|
2 projects
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that Stephen L. Knowles has worked on at least
3.0 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.
Pricing
|
1 project
|
$1mil+ |
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.
2 furnace 2 duct htr 1 erv; installed cost of ductwork supply/return/exh air $60 000; 1 refrigeration system type r410 capacity 4 tons. building permit no. b24004307. office addition
Valuation:
$100,000
Permit #:
H24014613
Status:
issued
Fee:
$1,071
Permit Type:
N/A
Building Type:
N/A
233-23pr new 3-story pre-k to 12 school building
Valuation:
$42,730,307
Permit #:
2024000457
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
233-23pr new 3-story pre-k to 12 school building
Valuation:
$42,730,307
Permit #:
2023004459
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
2 new chiller replacement 250 tons. building permit no. b22005052
Valuation:
$300,000
Permit #:
H22023263
Status:
complete
Fee:
$103
Permit Type:
N/A
Building Type:
N/A
5 water closet/toilet 2 urinal 2 lavatory sink 2 sink 2 floor drain 1 hot water heater; 90 lin.ft. drain waste vent piping; 215 lin.ft. storm and/or san sewer; 90 lin. ft. water distribution piping. building permit no. b17035596
Valuation:
$19,000
Permit #:
P19005194
Status:
complete
Fee:
$199
Permit Type:
N/A
Building Type:
N/A
3 urinals 4 lavatory sink 3 sink 1 hot water heater 100 lin ft drain waste vent piping 400 lin ft water distribution piping building permit no. b20013925
Valuation:
$15,000
Permit #:
P21006047
Status:
complete
Fee:
$158
Permit Type:
N/A
Building Type:
N/A
Commercial pb20192109 plumbing and fixtures per plans 38256 sq ft alterations
Valuation:
N/A
Permit #:
PP20191550
Status:
final
Fee:
$1,276
Permit Type:
plumbing
Building Type:
N/A
150 lin ft fuel gas piping building permit no. b20013925
Valuation:
$15,000
Permit #:
H21006053
Status:
complete
Fee:
$52
Permit Type:
N/A
Building Type:
N/A
4 water closet/toilet 2 urinals 4 lavatory sink 6 sink 1 drinking fountain 100 lin ft water distribution piping. building permit no. b17011420
Valuation:
$20,000
Permit #:
P18010007
Status:
complete
Fee:
$153
Permit Type:
N/A
Building Type:
N/A
450 lin.ft. fuel gas piping. building permit no. b17035596
Valuation:
$6,000
Permit #:
H20003768
Status:
complete
Fee:
$67
Permit Type:
N/A
Building Type:
N/A
273:17: fire sprinkler
Valuation:
$20,000
Permit #:
2019140007
Status:
final
Fee:
N/A
Permit Type:
Fire sprinkler
Building Type:
Commercial
No Description Available
Valuation:
N/A
Permit #:
C-00438-23
Status:
issued
Fee:
N/A
Permit Type:
Commercial sprinkler
Building Type:
N/A
Interior alteration building 101 - install water cooled chillers per approved plans. permits required for hvac and electrical
Valuation:
$400,000
Permit #:
B22005052
Status:
complete
Fee:
$6,351
Permit Type:
Alteration
Building Type:
N/A
Fire sprinklers - bathroom elementary new building pb20181037 obc 105.1.4 phased approval 03.18.19 cw - electronic *electronic* obc 107.5.1 full approval 07.18.19 kmk - no prints
Valuation:
N/A
Permit #:
PM190904
Status:
final
Fee:
$1,326
Permit Type:
Fire supression
Building Type:
N/A
2 furnaces 4 rooftop heating/cooling unts 250 lin ft fuel gas piping installed cost of ductwork supply/return/exh air $10 000. b12038663***amended 4/15/2014 4 exhaust fans @ $2 500 cost***ct
Valuation:
$80,000
Permit #:
H13041340
Status:
complete
Fee:
$496
Permit Type:
N/A
Building Type:
N/A
No Description Available
Valuation:
$0
Permit #:
RENEWCR18010626
Status:
Renewed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Addition - const bio-diesel refinery process support steel structure & spill containment - foundation for process reactors/pumps/piping per plan s- comply adj ord dated 04/25/2007 & fpb req - sep elec/mech/plumbing & fpb permits req - special inspection req
Valuation:
$483,789
Permit #:
CO08032925
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Addition - const bio-diesel refinery process support steel structure & spill containment - foundation for process reactors/pumps/piping per plan s- comply adj ord dated 04/25/2007 & fpb req - sep elec/mech/plumbing & fpb permits req - special inspection req
Valuation:
$483,789
Permit #:
CO08010604
Status:
complete
Fee:
$60
Permit Type:
N/A
Building Type:
N/A
Addition - const bio-diesel refinery process support steel structure & spill containment - foundation for process reactors/pumps/piping per plan s- comply adj ord dated 04/25/2007 & fpb req - sep elec/mech/plumbing & fpb permits req - special inspection req
Valuation:
$483,789
Permit #:
CO07038346
Status:
filed
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Addition - const bio-diesel refinery process support steel structure & spill containment - foundation for process reactors/pumps/piping per plan s- comply adj ord dated 04/25/2007 & fpb req - sep elec/mech/plumbing & fpb permits req - special inspection req
Valuation:
$483,789
Permit #:
B07010784
Status:
complete
Fee:
$6,058
Permit Type:
N/A
Building Type:
N/A
Stephen L. Knowles Reviews
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Stephen L. Knowles License info
Verified License
| License # | PL.25375 |
| Status | Active |
| City | Ohio Professional |
| Type | Plumbing Contractor |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Stephen L. Knowles at the Ohio Professional License Center.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | PL.16732 |
| Status | Active |
| City | Ohio Professional |
| Type | Plumbing Contractor |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Stephen L. Knowles at the Ohio Professional License Center.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | HY.16732 |
| Status | Active |
| City | Ohio Professional |
| Type | Hydronics Contractor |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Stephen L. Knowles at the Ohio Professional License Center.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | HY.25375 |
| Status | Active |
| City | Ohio Professional |
| Type | Hydronics Contractor |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Stephen L. Knowles at the Ohio Professional License Center.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | HV.16732 |
| Status | Active |
| City | Ohio Professional |
| Type | Hvac Contractor |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Stephen L. Knowles at the Ohio Professional License Center.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | HV.25375 |
| Status | Active |
| City | Ohio Professional |
| Type | Hvac Contractor |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Stephen L. Knowles at the Ohio Professional License Center.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | HY-0000016732 |
| Status | Active |
| State | Ohio |
| Type | Hydronics |
- When BuildZoom last verified this license, it had an expiration date of December, 2015. Check the current license status of Stephen L. Knowles with the Ohio Department of Commerce
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | HV-0000016732 |
| Status | Active |
| State | Ohio |
| Type | HVAC |
- When BuildZoom last verified this license, it had an expiration date of December, 2015. Check the current license status of Stephen L. Knowles with the Ohio Department of Commerce
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | HV-0000025375 |
| Status | Active |
| State | Ohio |
| Type | HVAC |
- When BuildZoom last verified this license, it had an expiration date of December, 2015. Check the current license status of Stephen L. Knowles with the Ohio Department of Commerce
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | HY-0000025375 |
| Status | Active |
| State | Ohio |
| Type | Hydronics |
- When BuildZoom last verified this license, it had an expiration date of December, 2015. Check the current license status of Stephen L. Knowles with the Ohio Department of Commerce
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | PL-0000025375 |
| Status | Active |
| State | Ohio |
| Type | Plumber |
- When BuildZoom last verified this license, it had an expiration date of December, 2015. Check the current license status of Stephen L. Knowles with the Ohio Department of Commerce
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 0401005393 |
| Status | Active |
| State | Virginia |
| Type | Architect License |
- When BuildZoom last verified this license, it had an expiration date of November, 2009. Check the current license status of Stephen L. Knowles with the Virginia Board for Architects, Professional Engineers, Land Surveyors, Certified Interior Designers and Landscape Architects
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | PL-0000016732 |
| Status | Active |
| State | Ohio |
| Type | Plumber |
- When BuildZoom last verified this license, it had an expiration date of December, 2015. Check the current license status of Stephen L. Knowles with the Ohio Department of Commerce
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | ARC.7906313 |
| Status | Inactive |
| State | Ohio |
| Type | Architect |
- According to the Ohio Architects Board, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Stephen L. Knowles at the Ohio Architects Board.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | HY.25375 |
| Status | Inactive |
| City | Ohio Professional |
| Type | Hydronics Contractor |
- According to the Ohio Professional License Center, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Stephen L. Knowles at the Ohio Professional License Center.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | HY.16732 |
| Status | Inactive |
| City | Ohio Professional |
| Type | Hydronics Contractor |
- According to the Ohio Professional License Center, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Stephen L. Knowles at the Ohio Professional License Center.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PL.25375 |
| Status | Inactive |
| City | Ohio Professional |
| Type | Plumbing Contractor |
- According to the Ohio Professional License Center, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Stephen L. Knowles at the Ohio Professional License Center.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PL.16732 |
| Status | Inactive |
| City | Ohio Professional |
| Type | Plumbing Contractor |
- According to the Ohio Professional License Center, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Stephen L. Knowles at the Ohio Professional License Center.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | HV.25375 |
| Status | Inactive |
| City | Ohio Professional |
| Type | Hvac Contractor |
- According to the Ohio Professional License Center, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Stephen L. Knowles at the Ohio Professional License Center.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | HV.16732 |
| Status | Inactive |
| City | Ohio Professional |
| Type | Hvac Contractor |
- According to the Ohio Professional License Center, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Stephen L. Knowles at the Ohio Professional License Center.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | FIRS7259158 |
| Status | Inactive |
| City | Strongsville |
| Type | Fire Suppression Contractor |
- According to the City of Strongsville, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Stephen L. Knowles at the City of Strongsville.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | PLBG8649980 |
| Status | Inactive |
| City | Strongsville |
| Type | Plumbing Contractor |
- According to the City of Strongsville, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Stephen L. Knowles at the City of Strongsville.
This is a sample of licensing data; click here to access a complete history.
99
BuildZoom Score
42
Permits
- Building permit records show that Stephen L. Knowles has worked on 42 permitted projects.
Stephen L. Knowles Employees
AC
Aldo Campellone
AC
Aldo Campellone Campellone
KL
Knowles, Stephen L
Owner
RC
Robert Campellone
RC
Robert Campellone Campellone
SK
Stephen L. Knowles
Owner