Updated: Jul 13, 2026
Location and Projects
Address
515 S SOUTHERN ST, Seattle, WA, 98108
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Left Coast Services HVAC/Mechanical Contractor
Left Coast Services LLC, 515 S Southern St, Seattle, WA (Owned by: Mackay, Greg Francis) holds a Construction Contractor, Construction Contractor license and 2 other licenses according to the Washington license board.
Their BuildZoom score of 108 ranks in the top 5% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Left Coast Services LLC, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Left Coast Services LLC Contact Information
Phone Number: (206) 762-7500
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Address: 515 S SOUTHERN ST, Seattle, WA 98108
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Left Coast Services LLC Seattle
Quality
108
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Left Coast Services LLC has a BuildZoom score of 108, which places them above 95% of 128,670 contractors in Washington.
Activity
|
15 projects
|
2025 |
|
19 projects
|
2024 |
|
29 projects
|
2023 |
Our building permit records indicate that Left Coast Services LLC has worked on at least
63.0 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
|
13 projects
|
New Constructions |
|
25 projects
|
HVAC projects |
|
4 projects
|
Mechanical projects |
Analyzing permits over the last 4 years shows that Left Coast Services LLC mostly works on
hvac project
and new construction
projects.
Pricing
|
3 projects
|
< $5k |
|
1 project
|
$5k-$20k |
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.
Building Permits by Left Coast Services LLC
This is a sample of this contractor's permits. Click here to access their complete permit history.
Decommission 300-gallon underground oil tank decommission 300 gallon underground residential heating oil tank in place with foam fill
Valuation:
N/A
Permit #:
FIR25-0022
Status:
expired
Fee:
$265
Permit Type:
N/A
Building Type:
N/A
Mechanical-gas piping outlet, a (single family residential) (repair or replacement) (mechanical) project involving 1 gas piping outlets - mechanical work description/location (example: 1st floor master bathroom garage)
Valuation:
N/A
Permit #:
BLD2023-0074
Status:
final
Fee:
$120
Permit Type:
N/A
Building Type:
N/A
Decommission a 300 gallon underground residential heating oil tank in place with a polyurethane foam fill
Valuation:
$5,500
Permit #:
FM-25-6
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Partch- above ground 275 gal tank install
Valuation:
N/A
Permit #:
FIR2025-0009
Status:
final
Fee:
$323
Permit Type:
N/A
Building Type:
N/A
Fire tank-oil tank above ground installation, installation of an above ground residential heating oil tank. since "mybuildingermit.com" does not have an "above ground tank " install selection available per christina @ city of edmonds we apply as a decommission and they will change to an ast install on their end. 9-23-21
Valuation:
N/A
Permit #:
FIR2021-0110
Status:
final
Fee:
$240
Permit Type:
N/A
Building Type:
N/A
Decommission 300 gallon underground residential heating oil tank by removal. equipment to be staged in the row on the east side of 119th ave se
Valuation:
N/A
Permit #:
22 111468 TG
Status:
final
Fee:
$721
Permit Type:
N/A
Building Type:
N/A
Decommission 500gal underground heating oil tank by removal
Valuation:
N/A
Permit #:
TANK2505-001
Status:
issued
Fee:
$106
Permit Type:
Decommissioning r...
Building Type:
N/A
Martinez: decommission ug heating oil tank decommission 300 gallon residential underground heating oil tank in place by foam fill
Valuation:
N/A
Permit #:
FIR23-0072
Status:
issued
Fee:
$240
Permit Type:
N/A
Building Type:
N/A
Smoots residence - decommission 300gl urhot, decommission 300 gallon underground residential heating oil tank in place by foam fill
Valuation:
N/A
Permit #:
FIR23-0047
Status:
final
Fee:
$240
Permit Type:
N/A
Building Type:
N/A
Isaacson tank decommissioning decommissioning of 300 gallon underground residential heating oil tank in place by foam fill. includes triple rinse & 2-way polyurethane foam fill
Valuation:
N/A
Permit #:
FIR22-0027
Status:
issued
Fee:
$84
Permit Type:
N/A
Building Type:
N/A
Project name: thompson use sprinkler choice on permit app per jaret fire marshall. decommission 300 gallon residential underground heating oil tank in place by foam fill
Valuation:
N/A
Permit #:
B2023-0512
Status:
issued
Fee:
$230
Permit Type:
N/A
Building Type:
N/A
Fox- decomission fire tank by removal, decommission 300 gallon residential underground heating oil tank by removal
Valuation:
N/A
Permit #:
FIR2023-0007
Status:
final
Fee:
$240
Permit Type:
N/A
Building Type:
N/A
Fire tank-fill in place, decommission 300 gallon residential underground heating oil tank in place by foam fill
Valuation:
N/A
Permit #:
FIR2023-0050
Status:
final
Fee:
$297
Permit Type:
N/A
Building Type:
N/A
Swedberg- remove fire oil tank, decommission 300 gallon underground residential heating oil tank by removal
Valuation:
N/A
Permit #:
FIR2023-0024
Status:
final
Fee:
$297
Permit Type:
N/A
Building Type:
N/A
Partch- tank decommision fill in place
Valuation:
N/A
Permit #:
FIR2025-0008
Status:
final
Fee:
$323
Permit Type:
N/A
Building Type:
N/A
Swedberg- install fire oil tank, installation of 300 gallon underground residential heating oil tank
Valuation:
N/A
Permit #:
FIR2023-0025
Status:
final
Fee:
$297
Permit Type:
N/A
Building Type:
N/A
Xiao- fire tank removal, decommission 300 gallon residential underground heating oil tank by removal
Valuation:
N/A
Permit #:
FIR2023-0005
Status:
final
Fee:
$240
Permit Type:
N/A
Building Type:
N/A
Fire tank - fill in place, decommission 300 gallon residential underground heating oil tank in place by foam fill
Valuation:
N/A
Permit #:
FIR2024-0048
Status:
final
Fee:
$297
Permit Type:
N/A
Building Type:
N/A
Xiao- fire tank install, installation of a 300 gallon residential underground heating oil tank
Valuation:
N/A
Permit #:
FIR2023-0009
Status:
final
Fee:
$240
Permit Type:
N/A
Building Type:
N/A
Fire tank-installation of 300 gal ust
Valuation:
N/A
Permit #:
FIR2025-0017
Status:
issued
Fee:
$323
Permit Type:
N/A
Building Type:
N/A
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Left Coast Services LLC Reviews
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Verified License
BuildZoom confirmed this contractor's license
Left Coast Services LLC License info
Verified License
| License # | LEFTCCS752R6 |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Date Issued | 12-31-2025 |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Left Coast Services 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 # | LEFTCCS829QB |
| Status | Active |
| City | Tukwila |
| Type | Construction Contractor, General |
| Class | Limited Liability Company |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Left Coast Services LLC at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | LEFTCCS829QB |
| Status | Inactive |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Limited Liability Company |
- According to the Washington State Department of Labor & Industries, 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 Left Coast Services LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
108
BuildZoom Score
Insured
| Insurer | Crum & Forster Specialty Ins |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Travelers Cas & Surety Co Of America |
| Bond Value | $12,000 |
129
Permits
- Building permit records show that Left Coast Services LLC has worked on 129 permitted projects.
Left Coast Services LLC Employees
AM
Alexander Moss
Partner/Member
DS
Devin Smith
Partner/Member
GM
Greg Mackay
Partner/Member
KM
Kelly Mackay
Partner/Member
MF
Mackay, Greg Francis
Owner