Updated: Jun 30, 2026
Location and Projects
Address
4414 B Pl NW, Auburn, WA, 98001
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Dingnor HVAC/Mechanical Contractor
Dingnor LLC, 4414 B Pl NW, Auburn, WA (Employees: Wantu Zhen and Zhen, Wantu) holds a Construction Contractor, General license and 2 other licenses according to the Tukwila license board.
Their BuildZoom score of 114 ranks in the top 2% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Dingnor LLC, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Dingnor LLC Contact Information
Phone Number: (253) 929-6286
Address: 4414 B Pl NW, Auburn, WA 98001
Dingnor LLC Auburn
Quality
114
98th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Dingnor LLC has a BuildZoom score of 114, which places them above 98% of 128,670 contractors in Washington.
Activity
|
16 projects
|
2025 |
|
28 projects
|
2024 |
|
12 projects
|
2023 |
Our building permit records indicate that Dingnor LLC has worked on at least
56.0 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
|
14 projects
|
Commercial Renovations |
|
42 projects
|
Mechanical projects |
|
19 projects
|
HVAC projects |
Analyzing permits over the last 4 years shows that Dingnor LLC mostly works on
mechanical project
and hvac project
projects.
Pricing
|
3 projects
|
< $5k |
|
9 projects
|
$5k-$20k |
|
8 projects
|
$20k-$50k |
|
2 projects
|
$100k-$250k |
The typical size of their permits is approximately $20,000. 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.
El kiosko restaurant tenant improvement - convert a portion of an old tire sales and service garage building. convert first floor service bays into restaurant. change of use and occupancy
Valuation:
$150,000
Permit #:
B25004424
Status:
triage
Fee:
$2,303
Permit Type:
N/A
Building Type:
N/A
New equipment includes: (2) type i grease exhaust pcus (1) type i exhaust hood (2) gas-fired makeup air units (7) vrf fan coil units (2) branch controllers (1) erv. refrigerant piping grease exhaust ductwork ductwork as shown on drawings. gas piping as shown on drawings. 25-100009-by ***post issuance revision needed to addition fire smoke damper schedule to drawings***
Valuation:
N/A
Permit #:
25 108824 BL
Status:
issued
Fee:
$13,594
Permit Type:
N/A
Building Type:
N/A
Kung fu tea & tkk fried chicken express. mechanical work associated with 1 255 sf restaurant tenant improvement (b24000923). work includes type i kitchen hood system and related duct work modulation of existing rooftop hvac over 400lbs and related air intake diffusers ductwork and exhaust fans. both mechanical and structural plans included with intake
Valuation:
$30,000
Permit #:
M24003337
Status:
issued
Fee:
$1,518
Permit Type:
N/A
Building Type:
N/A
Sarah wang|when submitting an application please ensure you have attached all required documents.|certification: by using this portal to apply for permits i certify i am the owner of the property or the owner's authorized agent. if acting as an authorized agent i further certify that i have full power and authority to file this application and to perform on behalf of the owner all act... see more
Valuation:
N/A
Permit #:
D23-0243
Status:
issued
Fee:
$3,521
Permit Type:
Comm_whse
Building Type:
N/A
Installation of (4) type i kitchen hoods and (4) matching exhaust fans. installation of (1) gas fired mua unit. installation of ductwork associated with mua and exhaust fan. replace (1) existing 4t rooftop unit like for like capacity. replace (1) existing 7.5t rooftop unit like for like capacity. interior loads not to change since use and occupancy is the same reuse existing ductwork ... see more
Valuation:
N/A
Permit #:
23 110914 BL
Status:
final
Fee:
$1,373
Permit Type:
N/A
Building Type:
N/A
Itidaki bbq restaurant take over existing coco restaurant in bellevue connection building tenant space #101. project to install: 1. two 9''-0 type-i hoods 2. one 5 type-ii hood and 3. one 4 dishwasher hood. all existing exhaust fans on roof will be reused and existing exhaust duct in existing shaft will be reused. new type-i and type-ii hood make-up air unit will install in the tenant... see more
Valuation:
N/A
Permit #:
23 103682 BL
Status:
final
Fee:
$2,977
Permit Type:
N/A
Building Type:
N/A
Mr. dim sum|when submitting an application please ensure you have attached all required documents.|certification: by using this portal to apply for permits i certify i am the owner of the property or the owner's authorized agent. if acting as an authorized agent i further certify that i have full power and authority to file this application and to perform on behalf of the owner all ac... see more
Valuation:
N/A
Permit #:
M23-0035
Status:
final
Fee:
$1,418
Permit Type:
Type 1 hood
Building Type:
N/A
El kiosko taqueira restaurant - mechanical permit to install a 10ft commercial kitchen hood with associated air system. - fire suppression system by separate permit. - gas layout by separate permit
Valuation:
$50,000
Permit #:
M25003772
Status:
triage
Fee:
$371
Permit Type:
N/A
Building Type:
N/A
Interior alteration from the existing m-retail (chinese herbal store) to m-retail (fuji bakery). adding new commercial kitchen equipment. adding interior finishing and furniture per plan
Valuation:
N/A
Permit #:
24 116853 BZ
Status:
issued
Fee:
$3,956
Permit Type:
N/A
Building Type:
N/A
Type: mechanical non residential class: alteration to structure or system, , [2018 imc] ezell's famous chicken (bnr23-09640): install (1)8'-9 type-i & (1)11'-0 type-i hoods in restaurant kitchen. exhaust fans and make-up air unit on roof
Valuation:
N/A
Permit #:
MNR24-02077
Status:
final
Fee:
$1,383
Permit Type:
N/A
Building Type:
N/A
Junbi sign replace previously closed business with new junbi's blade sign under the existing canopy. 7/28/25 ss: fees added for 1 sign circuit to include electrical on this permit
Valuation:
$2,000
Permit #:
7097202-SB
Status:
issued
Fee:
$244
Permit Type:
N/A
Building Type:
Commercial
Install one type-i ul listed ventless hood in tenant space kitchen for new added electrical griddle and one type-ii hood. hood installation related fire alarm and ansul system permit by contractors 22 118222 by
Valuation:
N/A
Permit #:
22 127683 BL
Status:
final
Fee:
$892
Permit Type:
N/A
Building Type:
N/A
Sarah wang|when submitting an application please ensure you have attached all required documents.|certification: by using this portal to apply for permits i certify i am the owner of the property or the owner's authorized agent. if acting as an authorized agent i further certify that i have full power and authority to file this application and to perform on behalf of the owner all act... see more
Valuation:
N/A
Permit #:
M23-0236
Status:
issued
Fee:
$951
Permit Type:
Type 1 hood
Building Type:
N/A
Project name: akane ramen exhaust hood assembly, , furnish and install one class 1 exhaust hood related ducting roof curb exhaust fan(s) and make up air unit on roof curb with related ducting supply to hood assembly. install related controls. electrical wiring and roofing repairs by others
Valuation:
N/A
Permit #:
B2022-0091
Status:
final
Fee:
$775
Permit Type:
N/A
Building Type:
N/A
Type: mechanical non residential class: new structure, , zip market tenant improvement (bnr23-09335): install 13ft type i hood and accompanying heated make up air and exhaust fan
Valuation:
N/A
Permit #:
MNR24-04848
Status:
withdrawn
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Submit as-built for 2 existing type 1 hood as requested by plan examiner daniel hopp. no work is required at this project except for the as-built drawing of the hoods
Valuation:
$5,000
Permit #:
BLD2024-0520
Status:
final
Fee:
$353
Permit Type:
N/A
Building Type:
Commercial - mech...
2018 imc - install (1) 9-ft long & (2) 10-ft long type-1 kitchen hoods with (3) rooftop exhaust fan units and (1) make-up air unit. also install screen for the e.f./m.a.u. and (2) condensing units
Valuation:
$20,000
Permit #:
MECH-2022-06448
Status:
final
Fee:
$831
Permit Type:
N/A
Building Type:
N/A
Griar's kitchen hood permit to install a 8ft commercial kitchen hood with 1 exhaust fan and 1 make up air unit (reference #7038974-cn) per plan
Valuation:
$25,000
Permit #:
7053545-ME
Status:
triage
Fee:
$562
Permit Type:
N/A
Building Type:
Commercial
This application is for strucural beam reinforcement review per the request from the mechanical plan reviewer of our hood permit 23 124211 bl 23 100202 by
Valuation:
N/A
Permit #:
24 103296 BZ
Status:
final
Fee:
$1,354
Permit Type:
N/A
Building Type:
N/A
Pier 88 boiling & seafood bar: install (2) 14'-0 type i hoods in restaurant kitchen. exhaust fans and make-up air unit on roof
Valuation:
$25,000
Permit #:
MECC-033076-2022
Status:
issued
Fee:
$738
Permit Type:
Type I hood
Building Type:
N/A
Dingnor LLC Reviews
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Dingnor LLC License info
Verified License
| License # | DINGNL*840N4 |
| 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 Dingnor LLC at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | DINGNL*840N4 |
| Status | Active |
| City | Marysville |
| Type | Contractor |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Dingnor LLC at the The City of Marysville, Washington.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | DINGNL*840N4 |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Limited Liability Company |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Dingnor LLC at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
114
BuildZoom Score
Insured
| Insurer | Liberty Northwest Ins Corp |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Ironshore Indemnity Inc |
| Bond Value | $12,000 |
82
Permits
- Building permit records show that Dingnor LLC has worked on 82 permitted projects.
Dingnor LLC Employees
WZ
Wantu Zhen
Partner/Member
ZW
Zhen, Wantu
Partner/Member