COMPANY RECORD · BELLEVUE, WA
Optimal HVAC LLC Derrek Lee Zielinski — permit history in Bellevue, WA
Optimal HVAC LLC Derrek Lee Zielinski appears on 18 Bellevue permit records from 2018 through 2025, most often mechanical / hvac (94.4% of the record).
Permit categories
| Category | Permits | Share |
|---|---|---|
| Mechanical / HVAC | 17 | 94.4% |
| General construction | 1 | 5.6% |
2 categories, as classified by the issuing authority. Small categories stay visible rather than being rounded away.
Activity by year
| Year | Permits issued |
|---|---|
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 2 |
| 2024 | 6 |
| 2025 | 1 |
Busiest year on record: 2024, with 6 permits. One project can account for several filings, so read this as filing activity rather than workload.
Where they worked
| Address in source | Most recent permit |
|---|---|
| 16250 NE 30th St | 2025-12-05 |
| 110 110th Ave NE | 2024-10-18 |
| 777 108th Ave NE | 2024-07-29 |
| 4333 Factoria Blvd SE | 2024-05-28 |
| 14120 SE 50th St | 2024-04-24 |
| 936 Lake Washington Blvd NE | 2024-03-03 |
| 65 112th Ave NE | 2024-02-15 |
| 301 151st Pl NE | 2022-05-18 |
| 3156 160th Ave SE | 2022-01-10 |
| 4505 168th Ave SE | 2021-05-04 |
| 10625 SE 4th St | 2021-04-29 |
| 3655 131st Ave SE | 2020-07-14 |
| 1845 116th Ave NE | 2020-03-25 |
| 2005 154th Ave SE | 2020-03-10 |
17 distinct addresses on record; the 14 most recent are shown. Addresses appear as the authority published them. A permit is a filing at an address, not a completed job there.
Also named on permits at the same addresses
| Company | Shared addresses | Years |
|---|---|---|
| Johnson Controls Fire Prttn LP | 3 | 2018–2025 |
| Electrocom | 2 | 2015–2024 |
| Datskiy Electric LLC | 2 | 2019–2022 |
| Custom Electrical Services LLC | 2 | 2018–2022 |
| Rhema Electric LLC | 2 | 2020–2024 |
| Integrity Networks Inc | 2 | 2017–2022 |
| Guardian Security Systems Inc | 2 | 2018–2022 |
| Nelson Electric Inc | 1 | 2024–2025 |
Companies that also appear in Bellevue permit records at addresses where Optimal HVAC LLC Derrek Lee Zielinski filed, in any year. Sharing an address is a documented co-appearance, not proof that they worked on the same project or with each other.
Permits on record
18 permits; open the full list
| Permit | Issued | Category | Address in source | Scope as filed | Declared value |
|---|---|---|---|---|---|
| 25 129198 BK | 2025-12-05 | Mechanical / HVAC | 16250 NE 30th St | A Single Family Residential Addition to Existing Structure None Project Involving (1 Ductless Heat Pump) | |
| 24 120064 BL | 2024-10-18 | Mechanical / HVAC | 110 110th Ave NE | We will be installing the walk-in cooler (and corresponding split system), blast chiller and refrigeration lines. 24-118389 BL: Kitchen Type I hood, PCU, makeup air & general exh | |
| 24 116534 BL | 2024-07-29 | Mechanical / HVAC | 777 108th Ave NE | Building a pre fabricated walk in cooler | |
| 24 100158 BL | 2024-05-28 | Mechanical / HVAC | 4333 Factoria Blvd SE | build pre frabicated walk in cooler | |
| 24 107327 BK | 2024-04-24 | Mechanical / HVAC | 14120 SE 50th St | A Single Family Residential Repair or Replacement None Project Involving (1 Air Conditioner) | |
| 24 104457 BK | 2024-03-03 | Mechanical / HVAC | 936 Lake Washington Blvd NE | A Single Family Residential Repair or Replacement None Project Involving (1 Heater, 1 Air Conditioner) | |
| 24 101294 BL | 2024-02-15 | Mechanical / HVAC | 65 112th Ave NE | Building two prefabricated walk-in coolers. 21-104536 BL | |
| 22 105455 BL | 2022-05-18 | Mechanical / HVAC | 301 151st Pl NE | Installing a pre fabricated walk in cooler | |
| 21 134416 BL | 2022-01-10 | Mechanical / HVAC | 3156 160th Ave SE | Building pre fabricated walk in cooler | |
| 21 108404 BK | 2021-05-04 | Mechanical / HVAC | 4505 168th Ave SE | A Single Family Residential Alteration to Existing Structure None Project Involving (1 Gas Piping Only (No fixtures)) | |
| 21 108200 BK | 2021-04-29 | Mechanical / HVAC | 10625 SE 4th St | A Single Family Residential New Structure None Project Involving (1 Stove or Cooktop, 1 Barbecue, 1 Logs, 5 Bath Fan, 1 Laundry Fan, 1 Kitchen Fan, 1 Whole House Fan, 1 Furnace 100 | |
| 20 110668 BL | 2020-07-14 | Mechanical / HVAC | 3655 131st Ave SE | installing walkin freezer,pipe refrigerant lines to compressor., 19 126749 BL | |
| 20 104097 BL | 2020-03-25 | Mechanical / HVAC | 1845 116th Ave NE | Installing/Building a prefabricated walk in Cooler, 17-120369BB | |
| 20 104595 BK | 2020-03-10 | Mechanical / HVAC | 2005 154th Ave SE | A Single Family Residential Alteration to Existing Structure None Project Involving (1 Furnace <= 100,000 BTU) | |
| 19 126749 BL | 2019-11-08 | Mechanical / HVAC | 3655 131st Ave SE | Install keg cooler ( walk-in ) pipe refrigerant lines to compressor. Install cooler and freezer ( walk- in ) pipe refrigerant lines to compressor, 19 103395by | |
| 19 119021 BK | 2019-07-14 | Mechanical / HVAC | 16611 SE 31st St | A Single Family Residential Alteration to Existing Structure None Project Involving (1 Air Conditioner) | |
| 18 129354 BT | 2018-11-02 | General construction | 1809 138th Pl SE | Finish basement drywall. Does not include electrical or plumbing. *Add mech 1 duct work | |
| 17 127684 BL | 2018-02-15 | Mechanical / HVAC | 10517 Main St - Bldg 1 | A Nonresidential Alteration to Existing Structure Project Installing {2-Bath Fan, 2-Heat Pump , 2-Air Handler, 40-Diffusers or Grilles > 15} |
Fields appear as the issuing authority published them, including spelling and blanks. Scope text is the applicant's description of intended work, not an inspection finding.
Search these records
The 18 permits above are a static record through 2025. Select a year above to open that year’s records, or search Optimal HVAC LLC Derrek Lee Zielinski in Bellevue, WA by address, trade or date range.
Source and limits
Public Bellevue permit records through 2025, counted by distinct permit number. This is a historical filing record: it cannot show current backlog, pricing, crew availability, licensing or insurance, and a quiet period may only mean work was filed elsewhere. Confirm anything commercial with the company and with the issuing authority before acting. How we build these records, and what we withhold →
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