Updated: Jun 24, 2026
Location and Projects
Address
Saint Helens, OR, 97051
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Duncan & Duncan Plumber
Duncan & Duncan Inc, Saint Helens, OR holds a Plumbing license according to the Oregon license board.
Their BuildZoom score of 101 ranks in the top 12% of 62,733 Oregon licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Duncan & Duncan Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Duncan & Duncan Inc Services
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Duncan & Duncan Inc Contact Information
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Single pdf process landlord work building 4 ste 5211 make ready ti; change of occupancy from s to b - convert warehouse to office demolish walls new walls to create open office area ceiling flooring finishes and electrical 1-water heater 1-sink
Valuation:
N/A
Permit #:
2025-027539-000-00-FA
Status:
complete
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Single pdf process liberty capital ste 425 4th floor ti; demolish walls new walls to create offices kitchenette open office area ceiling flooring finishes plumbing and electrical 1-sink 1-dishwasher
Valuation:
N/A
Permit #:
2025-011647-000-00-FA
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Single pdf process oregon wine board ste 100 1st floor ti: demolish walls new walls to create entry area offices break/tasting room print niche remodel conference room existing office ceiling flooring finishes plumbing and electrical 1-floor drian 1-water heater 1-garbage disposal 1-dishwasher 1-sink 1-insta-hot 1-hub drain 1-trap primer 1-glass washer 1-supply box
Valuation:
N/A
Permit #:
2024-098417-000-00-FA
Status:
final
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Single pdf process colliers pdx headquarters 16th floor ti; demolish walls new walls to create entry area hospitality lounge & bar boardrm lounge conference rms offices bathrm storage rms phone rms copy room coffee bars wellness room cooking room open office areas remodel existing bathrms ceiling flooring finishes plumbing 6-wc 5-lavs 2-urinals 3-sinks 1-dishwasher
Valuation:
N/A
Permit #:
2024-003858-000-00-FA
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Single pdf process nw staffing ste 1075 10th floor ti; demolish walls new walls to create reception area offices interview room conference room work room wellness room server room storage room testing room open office areas remodel breakrm ceiling flooring finishes plumbing and electrical 1-sink 1-dw 1-supply box
Valuation:
N/A
Permit #:
2023-047704-000-00-FA
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Addition floor sinks floor drain connect to grease waste line in space. plumbing for la sala wine merchant tenant
Valuation:
N/A
Permit #:
2025-014159-000-00-PT
Status:
issued
Fee:
N/A
Permit Type:
Addition/alterati...
Building Type:
N/A
Addition 8 clean out tee to existing exterior drain. for the city to test outgoing waste water for contaminants
Valuation:
N/A
Permit #:
2025-001907-000-00-PT
Status:
complete
Fee:
N/A
Permit Type:
Addition/alterati...
Building Type:
N/A
Single pdf process alliance insurance ste 350 3rd floor ti; demolish walls new walls to create storage room mail/copy room lobby it room conf room stor room break room wellness room phone room open office area office remodel offices boardrm ceiling flooring finishes plumbing 1-dishwasher 1-sink 1-supply box 1-coffee machine 1-garbage disposal 1-water heater 1-hub drain 1-trap primer 1... see more
Valuation:
N/A
Permit #:
2024-018237-000-00-FA
Status:
complete
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Single pdf process affiliated engineers ste 1300 13th floor ti; demolish walls new walls to create huddle room focus rms print/copy room break room server room storage room conf room open office area reception area ceiling flooring finishes plumbing and electrical 1-sink 1-dw 1-water dispenser 1-supply box 1-water heater 1-hub drain 1-trap primer
Valuation:
N/A
Permit #:
2023-072948-000-00-FA
Status:
complete
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Single pdf process landlord work spec suites 9th floor ti; minor demolish new demising walls to create 3 tenant spaces in suite a & c first time tenants occupancy b new walls to create offices conference rms breakrms server closets open office areas ceiling flooring finishes plumbing and electrical 2-sinks 2-icemakers 2-dw 2-hub drains 2-trap primers 2-wh
Valuation:
N/A
Permit #:
2023-064601-000-00-FA
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Single pdf process gearing rackner ste 875 8th floor ti; demolish walls new walls to create reception area breakrm offices conference rms copy/print room open office areas ceiling flooring finishes plumbing and electrical 1-sink 1-dw 1-coffee maker 1-wall box 1-wh demolish 1-sink
Valuation:
N/A
Permit #:
2022-176909-000-00-FA
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
F27 landlord work bike room 2nd flr; demolish walls new walls to create bike room shower/bathrms remodel existing bathrms ceiling flooring finishes plumbing and electrical fixture cap 7 sinks 2-wc 2-fd 2-lavs 1-wh 2-showers 1-df 1-wb s-1-6 s-2-1 2-trap primer
Valuation:
N/A
Permit #:
2022-149874-000-00-FA
Status:
complete
Fee:
N/A
Permit Type:
Alteration
Building Type:
Office
Single pdf process oregon symphony ste 385 3rd floor ti; demolish walls new walls to create reception meeting rms work room storage room digital media room office closet breakroom ceiling flooring finishes plumbing and electrical 1-sink 1-dw
Valuation:
N/A
Permit #:
2023-081096-000-00-FA
Status:
final
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Single pdf process kelly point restroom ste 100 ti; minor demolish new walls to create restrm install interior chainlink fence to create corridor new door to access corridor ceiling flooring finishes plumbing and electrical 1-wc 1-lav
Valuation:
N/A
Permit #:
2023-096957-000-00-FA
Status:
complete
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
Add- toilet rr sink utility sink floor drain/primer water heater/expansion tank
Valuation:
N/A
Permit #:
785-25-000319-PLM
Status:
final
Fee:
$144
Permit Type:
Addition
Building Type:
N/A
F25 landlord work 2nd & 3rd floor ti; demolish walls remodel 2nd floor - reception area bathrms lounge area breakrm 3rd floor - elevator lobby exercise room open office area ceiling flooring finishes plumbing and electrical , 5-wc 4-lavs 1-urinal
Valuation:
N/A
Permit #:
2022-207344-000-00-FA
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
N/A
New plumbing for ares international tenant improvement
Valuation:
N/A
Permit #:
P0157025
Status:
final
Fee:
$451
Permit Type:
N/A
Building Type:
N/A
Cascadia insulation supply tenant improvement interior plumbing
Valuation:
N/A
Permit #:
785-P16139
Status:
final
Fee:
$287
Permit Type:
N/A
Building Type:
N/A
1s127ab01300 suite 23 - f demolish - (1) sink (1) toliet relocate. addition break sink (1) toilet 2 water heaters (1) lav
Valuation:
N/A
Permit #:
B2022-2389
Status:
final
Fee:
$159
Permit Type:
Alteration
Building Type:
N/A
Add- 1 conference room sink
Valuation:
N/A
Permit #:
499-25-000488-PLM
Status:
final
Fee:
$146
Permit Type:
Addition
Building Type:
N/A
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Verified License
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Duncan & Duncan Inc License info
Verified License
| License # | 26-449PB |
| Status | Active |
| State | Oregon |
| Type | Plumbing |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Duncan & Duncan Inc at the Oregon Building Codes Division.
This is a sample of licensing data; click here to access a complete history.
101
BuildZoom Score
268
Permits
- Building permit records show that Duncan & Duncan Inc has worked on 268 permitted projects.