COMPANY RECORD · SEATTLE, WA
Acco Engineered Systems — permit history in Seattle, WA
Acco Engineered Systems appears on 354 Seattle permit records from 2017 through 2026, most often mechanical / hvac (82.2% of the record).
Permit categories
| Category | Permits | Share |
|---|---|---|
| Mechanical / HVAC | 291 | 82.2% |
| Electrical | 63 | 17.8% |
2 categories, as classified by the issuing authority. Small categories stay visible rather than being rounded away.
Activity by year
| Year | Permits issued |
|---|---|
| 2017 | 9 |
| 2018 | 17 |
| 2019 | 44 |
| 2020 | 58 |
| 2021 | 37 |
| 2022 | 40 |
| 2023 | 59 |
| 2024 | 33 |
| 2025 | 36 |
| 2026 | 21 |
Busiest year on record: 2023, with 59 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 |
|---|---|
| 311 CEDAR ST | 2026-08-12 |
| 1111 13TH AVE | 2026-06-08 |
| 1737 AIRPORT WAY S | 2026-06-01 |
| 1300 1ST AVE | 2026-06-01 |
| 3801 S ALASKA ST | 2026-05-28 |
| 5200 DENVER AVE S | 2026-05-26 |
| 5427 OHIO AVE S | 2026-05-15 |
| 901 5TH AVE | 2026-05-14 |
| 300 5TH AVE | 2026-05-14 |
| 1550 N 115TH ST | 2026-05-14 |
| 1800 9TH AVE | 2026-03-26 |
| 909 5TH AVE | 2026-03-17 |
| 12351 30TH AVE NE | 2026-02-17 |
| 6050 EAST MARGINAL WAY S | 2026-02-11 |
146 distinct addresses on record; the 14 most recent are shown. Declared value on record runs from $0 to $1,200,000, 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
354 permits; open the 50 most recent
| Permit | Issued | Category | Address in source | Scope as filed | Declared value |
|---|---|---|---|---|---|
| 7157181-BP | 2026-08-12 | Mechanical / HVAC | 311 CEDAR ST | Applying for a pressure vessel permit for un-permitted replacement of a failing expansion tank. | $3,200 |
| 7129168-ME | 2026-06-08 | Mechanical / HVAC | 1111 13TH AVE | Replace (9) rooftop gas/electric package units with new package rooftop heat pumps. Replace (4) rooftop exhaust fans in kind. Replace (1) kitchen grease exhaust fan in kind. Rep | $215,000 |
| 7133054-ME | 2026-06-01 | Mechanical / HVAC | 1737 AIRPORT WAY S | Install (1) new air compressor and associated accessories in roof penthouse. Install new compressed air drops on level 2, per plan. | $45,000 |
| 7144820-ME | 2026-06-01 | Mechanical / HVAC | 1300 1ST AVE | Demolish existing exhaust fan system and install new supply air ductwork and diffuser with tap from existing air handler. | $18,883 |
| 7145091-RF | 2026-05-28 | Mechanical / HVAC | 3801 S ALASKA ST | Replacement of (2) existing split systems serving VZW telecom room. Indoor and outdoor units. | $5,000 |
| 7136689-ME | 2026-05-27 | Mechanical / HVAC | 3801 S ALASKA ST | (2) Like-for-like split system replacements. | $35,000 |
| 7144827-RF | 2026-05-26 | Mechanical / HVAC | 5200 DENVER AVE S | Assist with installation and startup of new walk-in cooler system: To be completed after new walk-in cooler system is in place (equipment installed by others): o Install intercon | $10,556 |
| 7143405-RF | 2026-05-15 | Mechanical / HVAC | 5427 OHIO AVE S | Install (2) sets of refrigerant lines to serve (2) replacement split-system AC units. AC units installed under permit # 7136686-ME. | $1,000 |
| 7143357-EL | 2026-05-14 | Electrical | 901 5TH AVE | Relocate (1) thermostat | |
| 7143264-EL | 2026-05-14 | Electrical | 300 5TH AVE | RELOCATE 16 EXISTING THERMOSTATS. INSTALL 1 NEW THERMOSTAT. | |
| 7142518-RF | 2026-05-14 | Mechanical / HVAC | 1550 N 115TH ST | THE EXISTING SPLIT-SYSTEM (OUTDOOR CONDENSING UNIT ON A-WING 2ND FLOOR ROOF AND INDOOR FAN COIL UNIT) SERVING EQUIPMENT ROOM A100.10 WILL BE REPLACED WITH A LIKE-FOR-LIKE UNIT. | $25,000 |
| 7136686-ME | 2026-05-13 | Mechanical / HVAC | 5427 OHIO AVE S | Replace (2) like-for-like ductless split systems, per plan. | $15,000 |
| 7139703-BP | 2026-04-23 | Mechanical / HVAC | 1737 AIRPORT WAY S | Installing new air receiver. | $45,000 |
| 7135243-RF | 2026-03-26 | Mechanical / HVAC | 1800 9TH AVE | (2) 7.5 ton 1-to-1 split systems; (1) 5 ton 1-to-1 split system; (1) 5-ton VRF split system with (5) indoor fan coil units. | $10,000 |
| 7128530-ME | 2026-03-17 | Mechanical / HVAC | 909 5TH AVE | Like-for-like replacement of a 4-ton WSHP. Subject to Field Inspection (STFI) | $6,500 |
| 7124564-ME | 2026-02-17 | Mechanical / HVAC | 12351 30TH AVE NE | Replace (2) 5-ton SPVAC units with (2) new 3-ton SPVAC units; like-for-like, per plans. | $23,500 |
| 7127550-ME | 2026-02-11 | Mechanical / HVAC | 6050 EAST MARGINAL WAY S | Connect (N) process equipment to (E) gas piping system. Install (E) new exhaust ducts, routed to building exterior. Modify (E) compressed air system to connect (N) process equipmen | $33,400 |
| 7128193-ME | 2026-02-09 | Mechanical / HVAC | 720 2ND AVE | Replace an exhaust fan in the women's restroom on the 3rd floor of UWKC - Subject to Field Inspection (STFI) | $1,500 |
| 7128192-ME | 2026-02-09 | Mechanical / HVAC | 720 2ND AVE | Replace an exhaust fan in the women's restroom on the 2nd level of UWKC - Subject to Field Inspection (STFI) | $1,500 |
| 7128190-ME | 2026-02-09 | Mechanical / HVAC | 720 2ND AVE | Replace an exhaust fan in the bathroom of the women's restroom on the basement level of UWKC - Subject to Field Inspection (STFI) | $1,500 |
| 7123420-ME | 2026-02-03 | Mechanical / HVAC | 720 2ND AVE | Demo and replace (4) WSHP. Re-route ducting to match per plans. | $20,000 |
| 7118006-ME | 2025-12-01 | Mechanical / HVAC | 901 5TH AVE | 1. Relocate (1) VAV box; 2. Add (1) New VAV box with Electric Heat; 3. Grilles, ducts, and diffusers per plan. | $21,640 |
| 7116282-ME | 2025-11-20 | Mechanical / HVAC | 901 5TH AVE | Provide and install HVAC system, per plan | $36,000 |
| 7117812-EL | 2025-11-20 | Electrical | 1737 AIRPORT WAY S | Low Voltage for 1 thermostat. | $500 |
| 7116012-ME | 2025-11-19 | Mechanical / HVAC | 1737 AIRPORT WAY S | Alterations to mechanical system on existing commercial building, per plans. | $15,000 |
| 7115060-EL | 2025-11-04 | Electrical | 901 5TH AVE | Low Voltage permit for 4 t-stats | $1,000 |
| 7113272-RF | 2025-10-23 | Mechanical / HVAC | 2001 6TH AVE | relocate 2 existing DX Fan Coil units in elevator machine room. mechanical permit 7107331-ME | $1,000 |
| 7112851-EL | 2025-10-21 | Electrical | 8200 WALLINGFORD AVE N | Extending the wiring for control valves on hydronic baseboard heaters | $200 |
| 7108200-ME | 2025-10-01 | Mechanical / HVAC | 83 S KING ST | Office TI involving 1 new VAV box, 2 new transfer fans, VAV rebalancing, and duct/diffuser revisions. per plans | $39,170 |
| 7096847-ME | 2025-09-25 | Mechanical / HVAC | 2001 6TH AVE | Replacement of (5) cooling tower cells with (2) 2-cell towers on roof. Replacement of (4) condenser water pumps. Demo of (1) plate-and-frame heat exchanger. Install of (2) new plat | $1,000,000 |
| 7104518-EL | 2025-09-02 | Electrical | 401 UNION ST | install (1) new thermostats | $1,500 |
| 7104047-EL | 2025-08-28 | Electrical | 901 5TH AVE | Low voltage permit for T-stats | $500 |
| 7101712-ME | 2025-08-19 | Mechanical / HVAC | 901 5TH AVE | Relocate grilles and diffusers - Subject to Field Inspection (STFI) | $2,450 |
| 7101000-ME | 2025-08-14 | Mechanical / HVAC | 601 UNION ST | Small office TI involving relocation of 1 VAV, installation of 1 VAV, installation of 1 WSHP to serve server room, installation of 1 transfer fan to serve break room, and alteratio | $45,259 |
| 7101736-EL | 2025-08-14 | Electrical | 601 UNION ST | install (1) new tstat connected to WSHP | $100 |
| 7099654-EL | 2025-08-01 | Electrical | 720 2ND AVE | Disconnect/Reconnect WSHPs like for like replacement. 7/31/26 sk renewal | $10,000 |
| 7098421-ME | 2025-07-31 | Mechanical / HVAC | 411 1ST AVE S | Add / Relocate grilles - Subject to Field Inspection (STFI) | $5,000 |
| 7098426-EL | 2025-07-25 | Electrical | 411 1ST AVE S | Relocate (1) Thermostat. Install (1) Wall-Mount CO2 Sensor. | $500 |
| 7084202-ME | 2025-07-22 | Mechanical / HVAC | 720 2ND AVE | REPLACE DAMAGED WSHPS (LIKE FOR LIKE), PER PLAN. | $220,000 |
| 7096326-RF | 2025-07-16 | Mechanical / HVAC | 3800 MONTLAKE BLVD NE | Refrigeration permit for (1) 3-ton split system. Chiller | $2,000 |
| 7095490-EL | 2025-07-10 | Electrical | 5907 4TH AVE S | Connect 2 new units to existing tstats | $200 |
| 7077118-ME | 2025-07-03 | Mechanical / HVAC | 5907 4TH AVE S | Replace (1) package AC unit with gas heat and (1) package AC unit with (2) heat pumps of matching nominal tonnage, per plan. | $20,000 |
| 7093577-ME | 2025-07-03 | Mechanical / HVAC | 1800 9TH AVE | THIS PROJECT IS IN AN UNOCCUPIED TENANT SPACE. DEMO BACK EXISTING MECHANICAL SYSTEM TO ACCOMMODATE NEW TENANT DEMISING WALL AND PREPARE SPACE FOR FUTURE TI. | $25,000 |
| 7093664-RF | 2025-06-30 | Mechanical / HVAC | 1737 AIRPORT WAY S | Install (1) set of R-454B refrigerant lines to serve (1) split-system heat pump | $500 |
| 7093791-EL | 2025-06-30 | Electrical | 1737 AIRPORT WAY S | disconnect (e) split-system heat pump and air handler and reconnect replacement units. Reconnect (e) tstat to (n) air handler. | $1,000 |
| 7093663-ME | 2025-06-30 | Mechanical / HVAC | 1737 AIRPORT WAY S | Replace (1) split-system heat pump, like-for-like. subject to field inspections (STFI) | $18,000 |
| 7086634-ME | 2025-06-16 | Mechanical / HVAC | 1401 E JEFFERSON ST | Demo and replace existing CWP like for like. Install new Redundant pump in parallel, per plans. | $21,000 |
| 7089475-EL | 2025-06-04 | Electrical | 8333 55TH AVE NE | 9 tstats and 2 CO/NO2 sensors | $1,500 |
| 7089316-RF | 2025-06-04 | Mechanical / HVAC | 8333 55TH AVE NE | Refrigeration piping between 4 outdoor heat pumps and 4 corresponding indoor fan coils. | $5,000 |
| 7087635-ME | 2025-05-27 | Mechanical / HVAC | 9450 22ND AVE SW | Replace (1) 2-ton rooftop package heat pump, like-for-like. Subject to field inspections (STFI) Must use existing penetrations in the roof top, or doers not qualify for STFI. Inspe | $18,000 |
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 →