Updated: Jun 23, 2026
Location and Projects
Address
PO BOX 460474, Aurora, CO, 80015
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William's Plumbing
William's Plumbing, Aurora, Po Box 460474, Aurora, CO (Owned by: Williams Plumbing) holds a Plbg A license and 19 other licenses according to the Denver license board.
Their BuildZoom score of 107 ranks in the top 6% of 55,949 Colorado licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring William's Plumbing, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
William's Plumbing Services
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William's Plumbing Contact Information
Phone Number: (303) 278-0738
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Address: PO BOX 460474, Aurora, CO 80015
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William's Plumbing Aurora
Quality
107
94th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
William's Plumbing has a BuildZoom score of 107, which places them above 94% of 55,949 contractors in Colorado.
Activity
|
8 projects
|
2025 |
|
11 projects
|
2024 |
|
5 projects
|
2023 |
Our building permit records indicate that William's Plumbing has worked on at least
24.0 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
|
8 projects
|
Commercial Renovations |
|
3 projects
|
New Constructions |
|
22 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that William's Plumbing mostly works on
plumbing project
and commercial renovation
projects.
Pricing
|
1 project
|
< $5k |
|
1 project
|
$5k-$20k |
|
4 projects
|
$20k-$50k |
|
1 project
|
$50k-$100k |
|
1 project
|
$100k-$250k |
|
2 projects
|
$250k-$500k |
|
1 project
|
$500k-$1mil |
|
1 project
|
$1mil+ |
The typical size of their permits is approximately $66,300. 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.
Vatos tacos + tequilla-tenant improvement of existing restaurant space for new restaurant with exterior work. -scope to include demolish and construction with associated struc & mep work. -exterior work to include changes to storefront with overhead doors and rtu's to be added
Valuation:
$92,600
Permit #:
2022-PLUMB-0010419
Status:
final
Fee:
$971
Permit Type:
N/A
Building Type:
N/A
6900 e layton ave unit d - playa bowl - chg of occupancy - tenant improvements this project is the tenant improvements within an existing building to create a fruit acai bowl restaurant. business is primarily to-go. new restroom and prep areas will be constructed. utilities will be distributed per proposed plan. no changes are planned to the existing core and shell building including ... see more
Valuation:
$35,000
Permit #:
2023-PLUMB-0001935
Status:
final
Fee:
$300
Permit Type:
N/A
Building Type:
N/A
Arvada beer garden core and shell south building retail space
Valuation:
$700,000
Permit #:
COMM24-00031
Status:
issued
Fee:
$22,579
Permit Type:
New building
Building Type:
N/A
Arvada beer garden north building ground up new building
Valuation:
$3,000,000
Permit #:
COMM24-00030
Status:
final
Fee:
$86,640
Permit Type:
New building
Building Type:
N/A
Perspire sauna studio commercial tenant improvement
Valuation:
$334,835
Permit #:
22-3457
Status:
final
Fee:
$12,457
Permit Type:
Tenant improvement
Building Type:
N/A
Suite 1 - tenant improvement in existing commercial building built in 2021 for additional electrical outlets and circuits trim out three compartment sinks hand sink and hot water heater installation - for commercial food production - honey bunchie llc - spr20-0002
Valuation:
$1,200
Permit #:
CMA22-0004
Status:
final
Fee:
$175
Permit Type:
N/A
Building Type:
N/A
Interior commercial renovation
Valuation:
$300,000
Permit #:
COMM24-00072
Status:
final
Fee:
$11,426
Permit Type:
Tenant finish
Building Type:
N/A
Construct new accesible restroom. no new rooftop equipment is a part of this project. no work is planned to the existing exterior envelope including interior finishes of existing exterior walls and roof assembies except as specifically shown on the plans. no change of use is planned
Valuation:
$4,500
Permit #:
2022-PLUMB-0001825
Status:
final
Fee:
$159
Permit Type:
N/A
Building Type:
Commercial
2000 e 28th ave-point easy restaurant - expansion modification to existing restaurant space - adjust restroom layout from 4 unisex to 2 unisex stalls - enlarge back of house kitchen for larger prep area - enlarge bar area to accomodate more equipment - openings in existing non-structural walls
Valuation:
N/A
Permit #:
2021-SUDP-0004878
Status:
approved
Fee:
$100
Permit Type:
Alteration
Building Type:
N/A
The project is an interior renovation on level 1 and level 2 of an existing building. scope of work to include new lobby offices conference rooms and a break room no exterior work
Valuation:
$30,680
Permit #:
2023-PLUMB-0011829
Status:
final
Fee:
$134
Permit Type:
N/A
Building Type:
Commercial
Interior renovation of existing annex building to the tears mcfarlane mansion. change of use from event space to a coffee shop cafe
Valuation:
$27,000
Permit #:
2024-PLUMB-0004212
Status:
final
Fee:
$486
Permit Type:
N/A
Building Type:
Commercial
Perspire sauna studio change of occupancy with remodel work
Valuation:
N/A
Permit #:
PLUM25-0102
Status:
final
Fee:
$453
Permit Type:
Commercial sub co...
Building Type:
N/A
Commercial interior finish
Valuation:
$40,000
Permit #:
P66180
Status:
final
Fee:
$100
Permit Type:
327 (stores and o...
Building Type:
N/A
#115 99 s broadway - coo-playa bowl-tenant finish this 1 579 sf project is the first generation tenant improvements of an existing space located on the ground floor of an existing mixed use building(referred to as building a on base building plans). all utilities are near the tenant space and accessible from within the building. improvements will include a storefront modification to a... see more
Valuation:
N/A
Permit #:
2021-SUDP-0001696
Status:
approved
Fee:
$100
Permit Type:
Alteration
Building Type:
N/A
Alloy personal training
Valuation:
$180,000
Permit #:
COMM24-00070
Status:
final
Fee:
$7,004
Permit Type:
Tenant finish
Building Type:
N/A
Early start - look lab - 4164 e 8th pl. (prep demolish plumbing) related to 2024-log-0008180 | 2024-commcon-0001905
Valuation:
N/A
Permit #:
2024-DEMO-0000581
Status:
issued
Fee:
$100
Permit Type:
N/A
Building Type:
N/A
Lot que take out restuarant
Valuation:
$250,000
Permit #:
COMM20-00209
Status:
final
Fee:
$10,622
Permit Type:
Tenant finish
Building Type:
N/A
Demolish existing restroom and construction new accessible restroom. remove existing rear door and infill opening. remove existing window sawcut opening to ground and install new rear door. move existing electrical panel in space
Valuation:
$4,000
Permit #:
2020-PLUMB-0007584
Status:
final
Fee:
$176
Permit Type:
N/A
Building Type:
Commercial
Restaurant/bar tenant finish of existing core & shell space
Valuation:
$700,000
Permit #:
COMM18-00210
Status:
final
Fee:
$25,448
Permit Type:
Tenant finish
Building Type:
N/A
Fnd only - arvada beer garden north building ground up new building
Valuation:
N/A
Permit #:
FND24-00008
Status:
expired
Fee:
$673
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
William's Plumbing License info
Verified License
| Status | Active |
| City | Denver |
| Type | Plbg A |
- BuildZoom verified this license was active as of June 2026.
This is a sample of licensing data; click here to access a complete history.
Verified License
| Status | Active |
| City | Aurora |
| Type | Plumbing |
- BuildZoom verified this license was active as of June 2026.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 1891 |
| Status | Active |
| State | Colorado |
| Type | Plumbing Contractor |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for William's Plumbing at the Colorado Division of Professions and Occupations.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 179967 |
| Status | Active |
| State | Colorado |
| Type | Plumber |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for William's Plumbing at the Colorado Division of Professions and Occupations.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | AEC128 |
| Status | Active |
| Town | Parker |
| Type | Contractor |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for William's Plumbing at the The Town of Parker, Colorado.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 100228044 |
| Status | Active |
| City | Westminster |
| Type | Plumbing Contractor |
| Date Issued | 11-04-2025 |
- BuildZoom verified this license was active as of December 2025.
Verify this license's status for William's Plumbing at the City of Westminster, Colorado.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| City | Denver |
| Type | Plbg A |
- When BuildZoom last verified this license, it had an expiration date of March, 2023. Check the current license status of William's Plumbing with the City and County of Denver Community Planning and Development
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| City | Denver |
- When BuildZoom last verified this license, it had an expiration date of March, 2021. Check the current license status of William's Plumbing with the City and County of Denver Community Planning and Development
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | AEC128 |
| Status | Active |
| County | Mesa County |
| Type | Contractor |
- When BuildZoom last verified this license, it had an expiration date of December, 2022. Check the current license status of William's Plumbing with the Mesa County, CO
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | PC.0001891 |
| Status | Active |
| State | Colorado |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of February, 2019. Check the current license status of William's Plumbing with the Colorado Division of Professions and Occupations
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | PC.0001262 |
| Status | Active |
| State | Colorado |
| Type | Plumbing Contractor |
- When BuildZoom last verified this license, it had an expiration date of February, 2019. Check the current license status of William's Plumbing with the Colorado Division of Professions and Occupations
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | 179967 |
| Status | Active |
| County | Douglas County |
| Type | Master Plumbing |
- When BuildZoom last verified this license, it had an expiration date of March, 2015. Check the current license status of William's Plumbing with the Douglas County Building Division
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | CMP00298 |
| Status | Active |
| City | Arvada |
| Type | Company |
- When BuildZoom last verified this license, it had an expiration date of March, 2015. Check the current license status of William's Plumbing with the The City of Arvada, Colorado
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 17-2514 |
| Status | Inactive |
| Town | Castle Rock |
| Type | Plumbing |
- According to the Castle Rock Town, 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 William's Plumbing at the Castle Rock Town, Colorado.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | P00567 |
| Status | Inactive |
| City | Littleton |
| Type | Class P |
- According to the The City of Littleton, 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 William's Plumbing at the The City of Littleton, CO.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | LCC202200321 |
| Status | Inactive |
| City | Thornton |
| Type | Class D Plumbing |
- According to the Thornton City Development 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 William's Plumbing at the Thornton City Development Contractor License.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 1262 |
| Status | Inactive |
| State | Colorado |
| Type | Plumbing 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 William's Plumbing 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 # | P070476 |
| Status | Inactive |
| County | Douglas County |
| Type | Plumbing |
- According to the Douglas County Building Division, 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 William's Plumbing at the Douglas County Building Division.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | AEC4724 |
| Status | Inactive |
| City | Arvada |
| Type | Contractor |
- According to the The City of Arvada, 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 William's Plumbing at the The City of Arvada, Colorado.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | P00194 |
| Status | Inactive |
| City | Littleton |
| Type | Contractor |
- According to the The City of Littleton, 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 William's Plumbing at the The City of Littleton, CO.
This is a sample of licensing data; click here to access a complete history.
107
BuildZoom Score
Insured
| Insurer | Acuity |
Insured
| Workers Comp Provider | Pinnacol |
414
Permits
- Building permit records show that William's Plumbing has worked on 414 permitted projects.
William's Plumbing Employees
JD
Jonathan Dyffryn
Co Owner
P
Phil
Pw Contact
RP
R D Plumbing
Owner
WS
William R Siebenmorgen
Owner
WS
William Ray Siebenmorgen
WS
William Siebenmorgan
Owner
WS
William Siebenmorgen
WP
Williams Plumbing
Owner