Updated: Jun 14, 2026
Location and Projects
Address
18 BUTTONBALL TRL, Norwalk, CT, 06850
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William Duncan Plumber
William Duncan, 18 Buttonball Trl, Norwalk, CT holds a Plumbing & Piping Unlimited Contractor license and 1 other license according to the Connecticut license board.
Their BuildZoom score of 101 ranks in the top 12% of 12,093 Connecticut licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring William Duncan, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
William Duncan Services
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William Duncan Contact Information
Address: 18 BUTTONBALL TRL, Norwalk, CT 06850
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William Duncan Norwalk
Quality
101
88th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
William Duncan has a BuildZoom score of 101, which places them above 88% of 12,093 contractors in Connecticut.
Activity
|
2 projects
|
2025 |
|
5 projects
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that William Duncan has worked on at least
8.0 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
|
7 projects
|
Plumbing projects |
Analyzing permits over the last 4 years shows that William Duncan mostly works on
plumbing project
projects.
Pricing
|
3 projects
|
$20k-$50k |
|
1 project
|
$50k-$100k |
|
2 projects
|
$250k-$500k |
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.
Retroactive permit for interior renovations - 2nd floor bedroom bathroom 3rd floor sitting room office. reconfigure stairs on 1st 2nd 3rd floors
Valuation:
$325,000
Permit #:
BLD-2024-01898
Status:
complete
Fee:
$3,335
Permit Type:
N/A
Building Type:
N/A
Two-story addition for new garage with unfinished above miscellanous interior renovations
Valuation:
$400,000
Permit #:
BLD-2024-01796
Status:
approved
Fee:
$4,104
Permit Type:
N/A
Building Type:
N/A
Replace 2 toilets 2 lavs 1 shower valve rough and install new master bathroom deck tub shower with pan 2 vanity sinks 1 toilet reinstall kitchen sink dishwasher and ice maker
Valuation:
N/A
Permit #:
BLD-2024-01949
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install a fireplace surround gas line and two sconses
Valuation:
$25,000
Permit #:
BLD-2025-00338
Status:
complete
Fee:
$257
Permit Type:
N/A
Building Type:
N/A
Rough plumbing only - toilet shower and sink on second floor
Valuation:
N/A
Permit #:
BLD-2025-00353
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Re-work kitchen sink drain re-connect new sink re-install 4 toilets and re-connect 3 vanity sinks connect ice maker and dishwasher
Valuation:
N/A
Permit #:
BLD-2024-00858
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install gas line
Valuation:
N/A
Permit #:
BLD-2025-00513
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install gas line
Valuation:
N/A
Permit #:
BLD-2025-00513
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Rough toilets sinks and showers. replaced water heater w high efficiency water heater
Valuation:
N/A
Permit #:
BLD-2024-02106
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remove and re-install fixtures - toilet and sink replace shower trap remove and re-install baseboard heaters
Valuation:
N/A
Permit #:
BLD-2023-02164
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Remodel kitchen and replace front entry door
Valuation:
$30,000
Permit #:
BLD-2024-00856
Status:
issued
Fee:
$308
Permit Type:
N/A
Building Type:
N/A
Re-connect kitchen sink dishwasher and ice maker line relocate and replace some baseboard
Valuation:
N/A
Permit #:
BLD-2021-01612
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Repair water damage in existing finished basement
Valuation:
$60,000
Permit #:
BLD-2023-02162
Status:
cert. of approval issued
Fee:
$616
Permit Type:
N/A
Building Type:
N/A
Interior renovation for new kitchen (same location) install beam
Valuation:
$25,000
Permit #:
BLD-2021-01610
Status:
complete
Fee:
$257
Permit Type:
N/A
Building Type:
N/A
Installing a macerator toilet and a sink pumping into existing drain
Valuation:
$1,500
Permit #:
49820
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Interior renovations for kitchen bathroom bedroom (remove non-bearing wall)
Valuation:
$50,000
Permit #:
BLD-2020-86308
Status:
filed
Fee:
$513
Permit Type:
N/A
Building Type:
N/A
Outside shower (trap in basement)
Valuation:
N/A
Permit #:
BLD-2024-01649
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Re-installing dbl vanity sinks and toilet in same locations and replacing tub with a shower with pan
Valuation:
$2,200
Permit #:
P-19-663
Status:
issued
Fee:
N/A
Permit Type:
plumbing
Building Type:
Single family
Outdoor shower
Valuation:
$30,000
Permit #:
BLD-2024-01647
Status:
issued
Fee:
$308
Permit Type:
N/A
Building Type:
N/A
Lp line for stove
Valuation:
N/A
Permit #:
BLD-2021-04553
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Verified License
BuildZoom confirmed this contractor's license
William Duncan License info
Verified License
| License # | PLM.0204123-P1 |
| Status | Active |
| State | Connecticut |
| Type | Plumbing & Piping Unlimited Contractor |
| Date Issued | 11-01-2025 |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for William Duncan at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | HTG.0308983-S7 |
| Status | Active |
| State | Connecticut |
| Type | Heating, Piping & Cooling Limited Contractor |
| Date Issued | 09-01-2025 |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for William Duncan at the Connecticut Department of Consumer Protection.
This is a sample of licensing data; click here to access a complete history.
101
BuildZoom Score
91
Permits
- Building permit records show that William Duncan has worked on 91 permitted projects.
William Duncan Employees
WD
William Duncan