COMPANY RECORD · SEATTLE, WA
Duotec — permit history in Seattle, WA
Duotec appears on 37 Seattle permit records from 2015 through 2026, all of them mechanical / hvac.
Permit categories
| Category | Permits | Share |
|---|---|---|
| Mechanical / HVAC | 37 | 100% |
Activity by year
| Year | Permits issued |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 3 |
| 2018 | 1 |
| 2019 | 5 |
| 2020 | 1 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 5 |
| 2025 | 4 |
| 2026 | 4 |
Busiest year on record: 2021, 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 |
|---|---|
| 712 S KING ST | 2026-07-21 |
| 2136 N 90TH ST | 2026-03-19 |
| 3409 23RD AVE S | 2025-06-16 |
| 656 S KING ST | 2025-04-21 |
| 10510 LINDEN AVE N | 2024-12-17 |
| 1227 S WELLER ST | 2024-11-06 |
| 1809 7th AVE | 2024-04-26 |
| 5006 26TH AVE S | 2023-03-13 |
| 3001 S MYRTLE ST | 2023-02-02 |
| 318 E mercer ST | 2022-09-15 |
| 318 E MERCER ST | 2022-09-15 |
| 2700 AIRPORT WAY S | 2021-09-07 |
| 9826 34TH AVE SW | 2021-03-29 |
| 2203 AIRPORT WAY S | 2021-03-12 |
23 distinct addresses on record; the 14 most recent are shown. Declared value on record runs from $1,200 to $70,000, median $10,000. Addresses appear as the authority published them. A permit is a filing at an address, not a completed job there.
Permits on record
37 permits; open the full list
| Permit | Issued | Category | Address in source | Scope as filed | Declared value |
|---|---|---|---|---|---|
| 7137054-ME | 2026-07-21 | Mechanical / HVAC | 712 S KING ST | Install one 5 ton VRF heat pump on roof with 2 indoor air handlers, (2 ton and 3 ton). Connect to O.A. from existing ERV. | $40,000 |
| 7137059-RF | 2026-04-07 | Mechanical / HVAC | 712 S KING ST | Install one 5 ton multi-zone roof top heat pump, (1) 3 ton air handler and (1) 2 ton air handler. | $15,000 |
| 7134112-RF | 2026-03-19 | Mechanical / HVAC | 2136 N 90TH ST | Install refrigeration pipes for a 2.5 ton split system heat pump | $6,000 |
| 7134111-FR | 2026-03-19 | Mechanical / HVAC | 2136 N 90TH ST | Replace existing gas furnace with new 2.5 ton heat pump. | $10,000 |
| 7091190-FR | 2025-06-16 | Mechanical / HVAC | 3409 23RD AVE S | install one 3 ton heatpump to existing gas furnace | $5,200 |
| 7091059-RF | 2025-06-13 | Mechanical / HVAC | 3409 23RD AVE S | Install one 3 ton split system heatpump | $7,800 |
| 7081784-RF | 2025-04-21 | Mechanical / HVAC | 656 S KING ST | Replace one existing 5 ton split system heatpump. | $7,000 |
| 7074342-ME | 2025-04-18 | Mechanical / HVAC | 656 S KING ST | Replace one existing 5 ton split system heatpump. Install new exposed ductwork in lower dining area, replace damaged flex duct and 4 old supply air diffusers in main dining area, p | $28,000 |
| 7061419-FR | 2024-12-17 | Mechanical / HVAC | 10510 LINDEN AVE N | Install one 2 ton heatpump with 3 indoor ductless cassette units. 2 bathroom exhaust fans, 1 whole house exhaust fan, one kitchen exhaust and dryer exhaust. | $11,000 |
| 7061411-RF | 2024-12-17 | Mechanical / HVAC | 10510 LINDEN AVE N | Install one heatpump condenser unit with 3 indoor ductless ceiling cassette. | $7,000 |
| 7042839-ME | 2024-11-06 | Mechanical / HVAC | 1227 S WELLER ST | Install one 5 ton split system heatpump with ERV and ductwork, per plans. | $34,700 |
| 7042206-RF | 2024-08-21 | Mechanical / HVAC | 1227 S WELLER ST | Install one 5 ton split system heatpump | $7,000 |
| 7020722-ME | 2024-04-26 | Mechanical / HVAC | 1809 7th AVE | Replace flex duct with silver, install new supply duct, remove heat pump from ceiling to repair wall and re-install. STFI (Subject to Field Inspection) | $5,400 |
| 6952617-RF | 2023-03-13 | Mechanical / HVAC | 5006 26TH AVE S | Install mini split system. One ducted air handler and one ductless. | $3,000 |
| 6952615-FR | 2023-03-13 | Mechanical / HVAC | 5006 26TH AVE S | Replace existing oil furnace with new Mitsubishi mini split system. 1 out door condenser unit, 1indoor air handler and 1 ceiling ductless cassette. | $19,000 |
| 6945877-RF | 2023-02-02 | Mechanical / HVAC | 3001 S MYRTLE ST | Replace 2 existing split system heatpump. Replace 7 package units and convert to heatpump. | $48,000 |
| 6922463-RF | 2022-09-15 | Mechanical / HVAC | 318 E mercer ST | Install (2) 2 ton split system heatpumps in duplex. | $6,000 |
| 6922477-FR | 2022-09-15 | Mechanical / HVAC | 318 E MERCER ST | 1st floor, install one 2 ton air coil and modify existing ductwork to accommodate new floor plan. 2nd floor-Install one 2 ton ducted split system heatpump with supply and return a | $24,000 |
| 6891477-ME | 2022-06-30 | Mechanical / HVAC | 1227 S WELLER ST | Install one 3 ton split system heatpump with ERV and exposed spiral duct. | $20,000 |
| 6856864-RF | 2021-09-07 | Mechanical / HVAC | 2700 AIRPORT WAY S | Install 4 indoor mini splits and one outdoor unit. | $7,000 |
| 6830729-RF | 2021-03-29 | Mechanical / HVAC | 9826 34TH AVE SW | Install one two ton split system heat pump. | $5,000 |
| 6830794-FR | 2021-03-29 | Mechanical / HVAC | 9826 34TH AVE SW | Install one two ton split system heatpump. | $5,000 |
| 6827967-RF | 2021-03-12 | Mechanical / HVAC | 2203 AIRPORT WAY S | Replace 4 A/C condenser units with 3 heatpump and 1 A/C unit. replace 4 air handlers. | $16,000 |
| 6827971-RF | 2021-03-12 | Mechanical / HVAC | 1227 S weller ST | Install one 4 ton split system heatpump. | $4,000 |
| 6821416-RF | 2021-02-01 | Mechanical / HVAC | 4912 28TH AVE S | Install (1) 3 ton heatpump 1 Condenser for 3 ductless air handlers | $12,000 |
| 6788754-RF | 2020-06-29 | Mechanical / HVAC | 600 4TH AVE | Install 2 ton split system heatpump. | $3,000 |
| 6750008-ME | 2019-09-30 | Mechanical / HVAC | 509 OLIVE WAY | Replace existing supply air diffusers; relocate air handlers; reroute duct to accommodate new floor plan, per plan. SUBJECT TO FIELD INSPECTION (STFI) | $12,700 |
| 6750010-RF | 2019-09-25 | Mechanical / HVAC | 509 OLIVE WAY | Relocate 2 existing air handlers. | $4,000 |
| 6739168-ME | 2019-08-12 | Mechanical / HVAC | 509 OLIVE WAY | Relocate diffusers to accommodate new floor plan. | $6,200 |
| 6709565-ME | 2019-05-30 | Mechanical / HVAC | 6000 16TH AVE SW | Replace (2) roof furnaces at LHO building, per plans. | $70,000 |
| 6723225-ME | 2019-05-15 | Mechanical / HVAC | 6000 16TH AVE SW | Replace (2) exhaust fans and (1) silencer at HDM building, per plans. | $20,000 |
| 6705614-RF | 2018-12-28 | Mechanical / HVAC | 2118 S Lucile ST | Installing heat pump and gas furnace. | $10,000 |
| 6579843-RF | 2017-02-06 | Mechanical / HVAC | 705 S WELLER ST | CONNECT THIRTY FIVE FEET OF REFRIGERATION LINE FROM AIR HANDLER TO CONDENSING UNIT | |
| 6574289-RF | 2017-01-03 | Mechanical / HVAC | 4455 SHILSHOLE AVE NW | REMOVE 5 CONDENSING UNITS, AFTER NEW ROOFING IN PLACE, RE-INSTALL 5 UNITS AND START-UP ALL 5. | |
| 6574305-ME | 2017-01-03 | Mechanical / HVAC | 509 OLIVE WAY | DUCT WORK REVISION | $11,250 |
| 6563645-ME | 2016-10-25 | Mechanical / HVAC | 509 OLIVE WAY | RELOCATE SUPPLY AIR DIFFUSERS AND REROUTE DUCTWORK | $11,250 |
| 6453689-ME | 2015-01-07 | Mechanical / HVAC | 1809 7TH AVE | STFI Mechanical - Relocate (2) exhaust ducts and grills, replace (2) existing heaters in kind for Graphite (suite 700, 7th floor, Tower Builiding). | $1,200 |
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.
Source and limits
Public Seattle permit records through 2026, 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 →