Updated: May 26, 2026
Location and Projects
Address
2016 East Union Street, Seattle, WA, 98122
Use our bidding system to
request a quote
Williamson Landscape Architect LLC
Williamson Landscape Architect LLC, 2016 E Union St, Seattle, WA (Owned by: Williamson, William Keith) holds a Construction Contractor, General license and 3 other licenses according to the Tukwila license board.
Their BuildZoom score of 96 ranks in the top 20% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Williamson Landscape Architect LLC, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Williamson Landscape Architect LLC Services
Start a project today:
Williamson Landscape Architect LLC Contact Information
Phone Number: (206) 713-8913
Edit
Address: 2016 East Union Street, Seattle, WA 98122
Edit
Do you work for this business? Unlock this free profile to update company info and see who's viewing your profile.
Building Permits by Williamson Landscape Architect LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
Otcp: construction of new covered terrace and uncovered deck associated with existing single-family residence. includes mechanical for outdoor fireplace and new patio door
Valuation:
$12,950
Permit #:
ADDC17-0600
Status:
complete
Fee:
$1,203
Permit Type:
N/A
Building Type:
N/A
Project name: powell residence 1609 121st ave se driveway and landscaping replace existing driveway, and install retaining wall and landscaping. row fee = $249.00. subject to hourly review and inspection fees. see special conditions and attachments.
Valuation:
N/A
Permit #:
07-129857 TC
Status:
Closed
Fee:
$314
Permit Type:
N/A
Building Type:
N/A
Non native vegetation removal & native planting addition within 50 stream buffer
Valuation:
N/A
Permit #:
15 108110 GJ
Status:
final
Fee:
$639
Permit Type:
N/A
Building Type:
N/A
Project name: gellatly residence non-native vegetation removal & native planting addition within 50' stream buffer.
Valuation:
N/A
Permit #:
15-108111 LO
Status:
Pending
Fee:
$1,454
Permit Type:
N/A
Building Type:
N/A
Second floor tenant improvement construct addition and alterations to an existing commercial building per plans
Valuation:
$30,000
Permit #:
6753905-CN
Status:
issued
Fee:
$1,788
Permit Type:
Add/alt
Building Type:
Commercial
Closed as incomplete - expired permit. construct alterations including roof modifications to detached garage accessory to existing single famiyl residence per site plan stfi
Valuation:
$45,000
Permit #:
6217138
Status:
Permit Closed
Fee:
$705
Permit Type:
Single family du...
Building Type:
N/A
Closed as incomplete - expired permit repair and replace waterfront bulkhead accessory to existing single family residence per plan and mup 3003261
Valuation:
$138,000
Permit #:
6087773
Status:
Permit Closed
Fee:
$4,092
Permit Type:
Single family du...
Building Type:
N/A
Install new low voltage landscape lighting
Valuation:
N/A
Permit #:
1805-161
Status:
final
Fee:
$167
Permit Type:
N/A
Building Type:
N/A
Construct retaining walls sport court and site grading; construct arbor accessory to single family residence per plan
Valuation:
$72,000
Permit #:
6117214-CN
Status:
complete
Fee:
$2,628
Permit Type:
Add/alt
Building Type:
Single family/duplex
Dcva for landscape irrigation
Valuation:
N/A
Permit #:
1806-138
Status:
final
Fee:
$167
Permit Type:
N/A
Building Type:
N/A
Construct site retaining walls at front of existing single family residence per plan
Valuation:
$68,000
Permit #:
6174264-CN
Status:
complete
Fee:
$3,371
Permit Type:
Add/alt
Building Type:
Single family/duplex
Exception/exemption request for: ***revision*** 6379194- landscape renovation-backyard only
Valuation:
N/A
Permit #:
6435252-EX
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
Single Family/Duplex
Rebuild lower deck and construct addition to upper deck per plot plan and subject to field inspection (stfi)
Valuation:
$0
Permit #:
716163
Status:
Expired Permit
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Construct an autocourt landscape wall and driveway
Valuation:
N/A
Permit #:
08 134729 GA
Status:
final
Fee:
$229
Permit Type:
N/A
Building Type:
N/A
Install approx 28 landscape lv fixtures & wiring
Valuation:
N/A
Permit #:
6022854-EL
Status:
complete
Fee:
$87
Permit Type:
N/A
Building Type:
Single family/duplex
Install lv landscape lighting & 120 v transformer
Valuation:
N/A
Permit #:
6048849-EL
Status:
complete
Fee:
$60
Permit Type:
N/A
Building Type:
Single family/duplex
Installation of low voltage landscape lighting
Valuation:
N/A
Permit #:
6055336-EL
Status:
complete
Fee:
$74
Permit Type:
N/A
Building Type:
Single family/duplex
Single family residence add; addition patio arbor valuation @ 7, 000
Valuation:
N/A
Permit #:
BLD05242
Status:
final
Fee:
$259
Permit Type:
N/A
Building Type:
N/A
Install low voltage landscape lighting
Valuation:
N/A
Permit #:
6053285-EL
Status:
complete
Fee:
$82
Permit Type:
N/A
Building Type:
Single family/duplex
Ath lighting-landscaping
Valuation:
N/A
Permit #:
0707-036
Status:
final
Fee:
$119
Permit Type:
N/A
Building Type:
N/A
Similar Contractors See more
119
BZ Score
-
Avg Project
-
Projects
121
BZ Score
-
Avg Project
-
Projects
License # BANAHHS786R7
Milton, WA
119
BZ Score
$300K
Avg Project
-
Projects
Williamson Landscape Architect LLC Reviews
BuildZoom hasn't received any reviews for Williamson Landscape Architect LLC. Click here to be alerted when reviews are posted about them.
Recent Buildzoom Projects
Hiring a contractor?
Verified License
BuildZoom confirmed this contractor's license
Williamson Landscape Architect LLC License info
License Not Verified
| License # | WILLILA055LO |
| Status | Active |
| City | Tukwila |
| Type | Construction Contractor, General |
| Class | Limited Liability Company |
| Business Type | Limited Liability Company |
- When BuildZoom last verified this license, it had an expiration date of March, 2026. Check the current license status of Williamson Landscape Architect LLC with the The City of Tukwila, WA
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | WILLILA996RU |
| Status | Active |
| City | Tukwila |
| Type | Electrical Contractor, Limited Energy, Hvac/Rfrg |
| Class | Limited Liability Company |
| Business Type | Limited Liability Company |
- When BuildZoom last verified this license, it had an expiration date of December, 2025. Check the current license status of Williamson Landscape Architect LLC with the The City of Tukwila, WA
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | WILLILA055LO |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Williamson Landscape Architect LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | WILLILA996RU |
| Status | Active |
| State | Washington |
| Type | Electrical Contractor, Electrical Contractor, Electrical Contractor |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Williamson Landscape Architect LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
Insured
| Insurer | Security National Insurance |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Wesco Insurance Co |
| Bond Value | $4,000 |
20
Permits
- Building permit records show that Williamson Landscape Architect LLC has worked on 20 permitted projects.
Williamson Landscape Architect LLC Employees
Agent
SW
Sandra Williamson
Partner/Member
WW
Willaim Williamson
Partner/Member
WW
William Williamson
Partner/Member
WK
Williamson, William K
Owner
WK
Williamson, William Keith
Owner