COMPANY RECORD · SEATTLE, WA
United Systems Mechanical, LLC — permit history in Seattle, WA
United Systems Mechanical, LLC appears on 238 Seattle permit records from 2015 through 2026, most often mechanical / hvac (88.2% of the record).
Permit categories
| Category | Permits | Share |
|---|---|---|
| Mechanical / HVAC | 210 | 88.2% |
| Electrical | 28 | 11.8% |
2 categories, as classified by the issuing authority. Small categories stay visible rather than being rounded away.
Activity by year
| Year | Permits issued |
|---|---|
| 2015 | 17 |
| 2016 | 25 |
| 2017 | 21 |
| 2018 | 19 |
| 2019 | 19 |
| 2020 | 17 |
| 2021 | 18 |
| 2022 | 24 |
| 2023 | 10 |
| 2024 | 18 |
| 2025 | 31 |
| 2026 | 19 |
Busiest year on record: 2025, with 31 permits. One project can account for several filings, so read this as filing activity rather than workload.
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This page is a snapshot of United Systems Mechanical, LLC. The search behind it holds more than 400,977 Seattle permits naming a contractor, since 2015: 251,769 electrical permits, 143,940 mechanical (HVAC) permits, 5,268 fire protection permits.
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Where they worked
| Address in source | Most recent permit |
|---|---|
| 318 NICKERSON ST | 2026-10-09 |
| 6459 CALIFORNIA AVE SW | 2026-10-09 |
| 11066 5TH AVE NE | 2026-10-08 |
| 5602 15TH AVE NW | 2026-10-02 |
| 6451 CALIFORNIA AVE SW | 2026-09-30 |
| 8833 ROOSEVELT WAY NE | 2026-09-29 |
| 315 1ST AVE N | 2026-08-03 |
| 1201 Western AVE | 2026-05-29 |
| 5940 1ST AVE S | 2026-03-20 |
| 4001 S WILLOW ST | 2026-02-20 |
| 1520 NW LEARY WAY | 2026-01-23 |
| 1105 VALLEY ST | 2026-01-21 |
| 14115 AURORA AVE N | 2025-12-24 |
| 1314 E UNION ST | 2025-10-27 |
154 distinct addresses on record; the 14 most recent are shown. Declared value on record runs from $0 to $1,400,000, median $15,000. 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 |
|---|---|---|
| Guardian Security Systems Inc | 27 | 2015–2026 |
| Adt LLC | 24 | 2015–2026 |
| Titan Electric Inc | 14 | 2015–2025 |
| Firepower Incorporated | 13 | 2015–2026 |
| Sound Security | 12 | 2015–2026 |
| Smith Fire Systems | 11 | 2016–2026 |
| Washington Alarm Inc | 11 | 2015–2026 |
| Mastercraft Electric, Inc. | 10 | 2015–2026 |
Companies that also appear in Seattle permit records at addresses where United Systems Mechanical, LLC 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
238 permits; open the 50 most recent
| Permit | Issued | Category | Address in source | Scope as filed | Declared value |
|---|---|---|---|---|---|
| 7166799-EL | 2026-10-09 | Electrical | 318 NICKERSON ST | relocating (1) existing Thermostat and adding (1) new controller for an ERV | |
| 7166807-EL | 2026-10-09 | Electrical | 6459 CALIFORNIA AVE SW | disconnecting from the (3) old RTU's and reconnecting to the (3) new RTU's the HVAC controlls. | |
| 7147816-ME | 2026-10-08 | Mechanical / HVAC | 11066 5TH AVE NE | Relocate existing floor grilles per plan. Replace all the floor grilles with new. Five new ceiling exhaust fans with new associated dryer exhaust duct terminated up through the r | $28,000 |
| 7147037-ME | 2026-10-02 | Mechanical / HVAC | 5602 15TH AVE NW | New Type I kitchen hood, Type I kitchen exhaust fan, MUA, RTU & associated ductwork per plan. | $89,000 |
| 7147937-ME | 2026-09-30 | Mechanical / HVAC | 6451 CALIFORNIA AVE SW | Replace three existing gas packs (RTU's) with new gas packs and roof curbs, replace one existing Type I exhaust fan curb with new, replace one existing Type II exhaust fan curb wit | $102,000 |
| 7140793-ME | 2026-09-29 | Mechanical / HVAC | 8833 ROOSEVELT WAY NE | One 5-Ton split-system HP, One ERV, two EF's, Med Gas closet ducting, ducting and grilles per plan. All existing louvers! | $65,500 |
| 7162622-RF | 2026-09-15 | Mechanical / HVAC | 8833 ROOSEVELT WAY NE | Installation of (1) 5-ton split system heat pump. | $10,000 |
| 7150212-ME | 2026-08-26 | Mechanical / HVAC | 318 NICKERSON ST | New associated ductwork and grilles of the existing 2-ton FCU-11. install new ERV and associated ductwork & grilles, and install louvers, per plan. | $13,750 |
| 7138920-ME | 2026-08-03 | Mechanical / HVAC | 315 1ST AVE N | Two new ceiling exhaust fans, relocate one existing combination fire/smoke damper (FSD), three new FSD's, ductwork/grille revisions and additions per plan. | $24,500 |
| 7152919-EL | 2026-07-14 | Electrical | 8833 ROOSEVELT WAY NE | Installing low voltage conductors for (1) Air Handler and (1) ERV with actuators | |
| 7136030-ME | 2026-05-29 | Mechanical / HVAC | 1201 Western AVE | One new water-source heat pump, one new ERV and associated ductwork, per plans. | $32,000 |
| 7136431-EL | 2026-04-02 | Electrical | 5602 15TH AVE NW | Installation of controls and conductors for HVAC split system heat pump and ERV | |
| 7136439-RF | 2026-04-02 | Mechanical / HVAC | 5602 15TH AVE NW | Install refrigeration pipe for (1) 2-ton heat pump with (3) indoor air handlers | $4,000 |
| 7134311-RF | 2026-03-20 | Mechanical / HVAC | 5940 1ST AVE S | Install 3 mini split systems with 4 air handlers and associated refrigeration pipe. | $8,000 |
| 7119321-ME | 2026-03-19 | Mechanical / HVAC | 5940 1ST AVE S | Goodwill - Georgetown Distribrution Center. (3) new split-systems with (4) new indoor duct-less split-systems; (3) new ERV's and (2) new exhaust fans. Modifications to the existi | $38,000 |
| 7134309-EL | 2026-03-19 | Electrical | 5940 1ST AVE S | HVAC Controls. (7) new thermostats and relocating (1) thermostat. Also installing actuators for ERV's and installing associated control conductors. | |
| 7129745-RF | 2026-02-20 | Mechanical / HVAC | 4001 S WILLOW ST | Install refrigeration pipe for 6 split system heat pumps | $12,000 |
| 7012446-ME | 2026-01-23 | Mechanical / HVAC | 1520 NW LEARY WAY | HVAC WORK UNDER SDCI RECORD #6552404-CN010/#6552402-CN-010 AND 2015 SEATTLE ENERGY CODE. FIVE NEW GAS-FIRED RADIANT HEATERS, SEVEN CEILING MOUNTED EXHAUST FANS, TWO SERVICE BAY ROO | $71,000 |
| 7125838-EL | 2026-01-21 | Electrical | 1105 VALLEY ST | ||
| 7122612-RF | 2025-12-24 | Mechanical / HVAC | 14115 AURORA AVE N | Install refrigeration pipe for (3) Split System Heat Pumps | $8,000 |
| 7122610-EL | 2025-12-24 | Electrical | 14115 AURORA AVE N | Install controls and conductors for (3) Split system Heat pumps and (2) ERV's | $5,000 |
| 7108171-ME | 2025-12-10 | Mechanical / HVAC | 14115 AURORA AVE N | Three new split-system heat pumps, two new ERV's, dryer exhaust ducts from six new residential dryers, Make-up Air Fan, Duct heater. Associated ductwork permit plan. | $76,000 |
| 7098831-ME | 2025-10-27 | Mechanical / HVAC | 1314 E UNION ST | Add a chimney/flue in the north building as part of soil vapor extraction system located in basement of type 1 structure with the fan mounted on the roof per plans. | $90,000 |
| 7100332-ME | 2025-10-14 | Mechanical / HVAC | 5602 15TH AVE NW | One new 2-Ton split-system heat pump with three indoor wall mounted fan coils, one new ERV and associated ductwork. | $23,000 |
| 7110499-EL | 2025-10-07 | Electrical | 4001 S WILLOW ST | Install controls and conductors for (2) RTU's, (3) ERV's, (6) Split system heat pumps and Garage Exhaust fan system. | $16,000 |
| 7102623-ME | 2025-08-25 | Mechanical / HVAC | 1105 VALLEY ST | PURSKIN T.I. - LAKEFRONT BLOCKS - BLOCK 25 -RELOCATE ONE EXISTING WATER-SOURCE HEAT PUMP. -ONE NEW ERV -NEW DUCTWROK, DIFFUSERS AND GRILLES. -DRYER EXHAUST DUC Subject to Fiel | $3,600 |
| 7097286-RF | 2025-07-21 | Mechanical / HVAC | 2619 4TH AVE N | Install refrigeration pipe for (2) Split System Heat Pumps | $10,000 |
| 7097289-EL | 2025-07-21 | Electrical | 2619 4TH AVE N | Install low voltage controls and cabling/conductors for (2) split system heat pumps and (2) ERV's | $10,000 |
| 7097133-EL | 2025-07-18 | Electrical | 1314 E UNION ST | Installation of low voltage controls and associated low voltage conductors for complete HVAC system and parking garage exhaust system controls. | $32,000 |
| 7094999-RF | 2025-07-09 | Mechanical / HVAC | 1314 E UNION ST | Refrigeration permit in conjunction with Mechanical Permit 7065671-ME. (14) split system heat pumps. | $15,000 |
| 7065671-ME | 2025-07-08 | Mechanical / HVAC | 1314 E UNION ST | HVAC for 7-story mixed use project, per plans. (Does not include unit venting/ERV's. Unit venting on separate permit.) | $1,020,000 |
| 7089555-RF | 2025-06-05 | Mechanical / HVAC | 5819 PHINNEY AVE N | Installation of refrigeration pipe for Mitsubishi Heat Pumps | $70,000 |
| 7089549-EL | 2025-06-05 | Electrical | 5819 PHINNEY AVE N | Installation of low voltage controls and cabling for HVAC | $5,000 |
| 7084234-RF | 2025-05-07 | Mechanical / HVAC | 1124 NW 53RD ST | Replace 3.5-ton Condensing unit, indoor coil and refrigeration pipe. | $4,000 |
| 7084232-EL | 2025-05-06 | Electrical | 1124 NW 53RD ST | Replacement of HVAC Condensing unit, need to disconnect and reconnect low voltage controls. | $500 |
| 7078009-ME | 2025-05-02 | Mechanical / HVAC | 1124 NW 53RD ST | Replace & Relocate one existing 3.5-Ton split system air conditioner, per plans. | $15,000 |
| 7073889-ME | 2025-04-22 | Mechanical / HVAC | 2619 4TH AVE N | TWO NEW 3-TON DUCT-LESS SPLIT-SYSTEM HEAT PUMP, TWO NEW ERV'S AND ASSOCATED DUCTWORK AND GRILLES. per plans | $40,500 |
| 7081287-RF | 2025-04-18 | Mechanical / HVAC | 4905 AURORA AVE N | Install refrigerant pipe for (2) VRF systems with (2) BC's and (15) fan coils and refrigerant pipe for (3) Split systems. | $30,000 |
| 7081276-EL | 2025-04-17 | Electrical | 4905 AURORA AVE N | Installation of low voltage cabling and controls for complete HVAC system. | $30,000 |
| 7080311-RF | 2025-04-14 | Mechanical / HVAC | 5601 22ND AVE NW | Relocate 4 existing VRF air handlers and modify refrigerant pipe for each air handler | $8,000 |
| 7078926-EL | 2025-04-03 | Electrical | 5601 22ND AVE NW | Low voltage wiring for (4) air handler thermostats, (1) ERV Thermostat and (2) Actuators. | $2,000 |
| 7066889-ME | 2025-03-16 | Mechanical / HVAC | 3300 W MCGRAW ST | Re-install all the existing grilles and diffusers in the new ceiling grid. Two new supply air diffuses, dryer exhaust ductwork up through roof, two new in-line exhaust fans, per p | $10,900 |
| 7066164-ME | 2025-03-16 | Mechanical / HVAC | 925 N 130TH ST | 3 new through the wall ERV's, new floor grille, relocate seven existing floor grilles, relocate two existing return air grilles, four new ceiling mounted exhaust fans, new dryer ex | $9,200 |
| 7069555-ME | 2025-02-11 | Mechanical / HVAC | 1917 QUEEN ANNE AVE N | New diffuser and grilles - Subject to Field Inspection (STFI) | $3,400 |
| 7068054-EL | 2025-01-30 | Electrical | 5130 LEARY AVE NW | HVAC Controls and wiring for VRF system with (1) Outdoor unit, (1) BC, (14) Fan coil units and (1) ERV. | $14,000 |
| 7068056-RF | 2025-01-30 | Mechanical / HVAC | 5130 LEARY AVE NW | Installation of VRF system consisting of (1) outdoor unit, (1) BC, and (14) fan coils. | $25,000 |
| 7051647-ME | 2025-01-29 | Mechanical / HVAC | 5130 LEARY AVE NW | One VRF heat pump and fourteen indoor fan coil units, one ERV, three radiant heaters, one car drive exhaust fan, two louvers and CO sensor controls. per plans | $150,000 |
| 7066742-RF | 2025-01-27 | Mechanical / HVAC | 14343 15TH AVE NE | Installation of refrigeration piping for HVAC equipment. construction permit 6883537-CN | $29,000 |
| 7064942-EL | 2025-01-13 | Electrical | 14343 15TH AVE NE | Complete low voltage controls and wiring for HVAC systems and garage exhaust low voltage control systems | $35,000 |
| 7064381-EL | 2025-01-09 | Electrical | 925 N 130TH ST | Relocate 3 existing thermostats | $1,800 |
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 →
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