Updated: May 26, 2026
Location and Projects
Address
Portland, OR, 97220
Use our bidding system to
request a quote
Mammoth Mechanical
Mammoth Mechanical, (Employee: Lawrence Wiedefeld) holds a Construction Contractor, Construction Contractor license and 1 other license according to the Washington license board.
Their BuildZoom score of 106 ranks in the top 7% of 62,733 Oregon licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Mammoth Mechanical, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Mammoth Mechanical Contact Information
Phone Number: (352) 989-1327
Edit
Do you work for this business? Unlock this free profile to update company info and see who's viewing your profile.
Mammoth Mechanical
Quality
106
93rd percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Mammoth Mechanical has a BuildZoom score of 106, which places them above 93% of 62,733 contractors in Oregon.
Activity
|
11 projects
|
2025 |
|
2 projects
|
2024 |
Our building permit records indicate that Mammoth Mechanical has worked on at least
13.0 projects over the past 2 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
|
Mechanical projects |
|
8 projects
|
HVAC projects |
Analyzing permits over the last 4 years shows that Mammoth Mechanical mostly works on
mechanical project
and hvac project
projects.
Pricing
|
2 projects
|
< $5k |
|
7 projects
|
$5k-$20k |
|
2 projects
|
$50k-$100k |
The typical size of their permits is approximately $8,500. 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.
Install of new hvac system hood system and walk in cooler system engineering for walk in cooler to be performed by imperial brown and submitted at a later date
Valuation:
$10,500
Permit #:
B0019125
Status:
final
Fee:
$332
Permit Type:
N/A
Building Type:
N/A
Install of new hood modifications of ceiling structure in addition to the mechanical permit filed for this location
Valuation:
$8,500
Permit #:
479-25-000076-STR
Status:
final
Fee:
$396
Permit Type:
Alteration
Building Type:
N/A
Alteration of ductwork replacement of existing grilles and the mounting of a new air curtain over doors
Valuation:
$5,800
Permit #:
B0423925
Status:
final
Fee:
$219
Permit Type:
N/A
Building Type:
N/A
Install of customer provided rtus make up air unit and exhaut fan with new hood system. hood to include fire suppression system by others
Valuation:
$8,500
Permit #:
555-24-002504-MECH
Status:
plancheck
Fee:
$36
Permit Type:
New
Building Type:
N/A
Install of new walk in cooler and beer cave
Valuation:
$8,500
Permit #:
555-25-002605-STR
Status:
expired
Fee:
$205
Permit Type:
Alteration
Building Type:
N/A
Install if new wic box and freezer box
Valuation:
$8,500
Permit #:
921-25-000335-STR
Status:
issued
Fee:
$279
Permit Type:
Alteration
Building Type:
N/A
Install of new wic and freezer assembly
Valuation:
$10,500
Permit #:
921-25-000333-MECH
Status:
issued
Fee:
$294
Permit Type:
Alteration
Building Type:
N/A
Install of new hood and mua system 4/15/25: addition 15’ of gas line
Valuation:
$9,300
Permit #:
479-25-000042-MECH
Status:
final
Fee:
$260
Permit Type:
Alteration
Building Type:
N/A
Structural for the install of new walk in coolers freezer new make up air unit and type 1 hood
Valuation:
$8,500
Permit #:
555-24-008063-STR
Status:
final
Fee:
$205
Permit Type:
New
Building Type:
N/A
Install of new walk in cooler
Valuation:
$10,000
Permit #:
555-25-002416-MECH
Status:
final
Fee:
$171
Permit Type:
Alteration
Building Type:
N/A
Ava tigard - new split system and air handler with duct work
Valuation:
$4,500
Permit #:
MEC2025-00016
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Ava roasteria cafe - mechanical for ti: new hvac system and ducting for cafe
Valuation:
$5,500
Permit #:
MEC2024-00911
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Install of class 1 hood
Valuation:
$8,500
Permit #:
555-25-007312-MECH
Status:
issued
Fee:
$195
Permit Type:
Alteration
Building Type:
N/A
Install of mechanical hvac system exhaust hood and walk in cooler and freezer
Valuation:
$85,000
Permit #:
971-25-000913-MECH
Status:
intake requirements needed
Fee:
$795
Permit Type:
New
Building Type:
N/A
Install of new hvac systems walk in cooler and exhaust fans
Valuation:
N/A
Permit #:
MEC-0581-25
Status:
plan review letter
Fee:
$67
Permit Type:
New
Building Type:
N/A
East/west; construction of a new us market with gas station
Valuation:
$65,000
Permit #:
309-25-000091-MECH-01
Status:
issued
Fee:
$689
Permit Type:
N/A
Building Type:
N/A
Replace existing hvac system install new walk in cooler
Valuation:
$4,500
Permit #:
25 121177 00 M
Status:
issued
Fee:
N/A
Permit Type:
Commercial
Building Type:
N/A
Alterations to existing suite on 2nd floor of johnson hall rooms 219-221
Valuation:
N/A
Permit #:
24-06487-01
Status:
final
Fee:
$80
Permit Type:
N/A
Building Type:
N/A
Similar Contractors See more
123
BZ Score
$11.5K
Avg Project
-
Projects
129
BZ Score
$494K
Avg Project
-
Projects
125
BZ Score
$9K
Avg Project
-
Projects
Mammoth Mechanical Reviews
BuildZoom hasn't received any reviews for Mammoth Mechanical. Click here to be alerted when reviews are posted about them.
Recent Buildzoom Projects
Let us find you an HVAC pro in your area today
We'll search our vast network of HVAC Pros and connect
you with one that meets your needs today.
Verified License
BuildZoom confirmed this contractor's license
Mammoth Mechanical License info
Verified License
| License # | MAMMOM*770OA |
| 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 Mammoth Mechanical at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 246729 |
| Status | Inactive |
| State | Oregon |
| Business Type | Limited Liability Company |
- According to the Oregon Construction Contractors Board (CCB), 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 Mammoth Mechanical at the Oregon Construction Contractors Board (CCB).
This is a sample of licensing data; click here to access a complete history.
106
BuildZoom Score
Insured
| Insurer | United National Ins Co |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Western Surety Co |
| Bond Value | $6,000 |
13
Permits
- Building permit records show that Mammoth Mechanical has worked on 13 permitted projects.
Mammoth Mechanical Employees
LW
Lawrence Wiedefeld
Partner/Member