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Best Fire-protection contractors in Seattle, WA

A ranked shortlist of licensed fire-protection contractors for someone hiring or vetting in Seattle. Ranked on an active L&I class for the work and job-relevant Seattle city building records, not reviews, ads, or a workmanship guarantee.

Seattle city building records through 2026-10-19, verified against the Washington State Department of Labor & Industries licensing records, snapshot dated 2026-08-16. Ranking reflects license standing and city building records, not a workmanship guarantee. This week's Seattle city building records.

Which fire-protection contractor has done the most fire-protection jobs in Seattle?

Reliance Fire Protection Inc has done the most fire-protection jobs in Seattle of any firm holding the matching L&I class: 139 jobs, most recently in 2026. It has held L&I license RELIAFP102L1 for 36 years.

That count includes only city building records whose type matches fire-protection work in Seattle's own records, and only firms that hold the matching L&I class as a primary or tied specialty, so a firm with a larger pile of unrelated jobs does not rank here. Jobs are counted per license number, and a firm holding several licenses is counted on its busiest one. Seattle records run through 2026-10-19.

See Reliance Fire Protection Inc's license and job record →

Most fire-protection jobs in Seattle, all city records on file, among licensed fire-protection contractors

  1. 1Reliance Fire Protection Inc

    L&I RELIAFP102L1 · 139 jobs · 2026-10-07

  2. 2Viking Auto Sprinkler Co

    L&I VIKINAS373NT · 112 jobs · 2026-05-26

  3. 3Crown Fire Protection Inc

    L&I CROWNFP044LL · 107 jobs · 2026-10-13

  4. 4Cascadia Fire Protection LLC

    L&I CASCAFP833L2 · 100 jobs · 2026-09-17

  5. 5Ace Fire System LLC

    L&I ACEFIFS908M3 · 65 jobs · 2026-09-16

  6. 6Eclipse Fire Sprinklers LLC

    L&I ECLIPFS783DP · 26 jobs · 2026-06-22

  7. 7Fire Protection Systems LLC

    L&I FIREPSL981K9 · 17 jobs · 2026-09-19

  8. 8Stewart Fire Protection LLC

    L&I STEWAFP893PR · 17 jobs · 2022-07-14

  9. 9Advanced Fire Protection Inc

    L&I ADVANFP199B6 · 17 jobs · 2022-05-17

  10. 10Advanced Fire Protection LLC

    L&I ADVANFP772QC · 17 jobs · 2022-05-17

  11. 11First Fire Protection

    L&I FIRSTFP756CL · 16 jobs · 2021-12-10

  12. 12Valor Fire Protection LLC

    L&I VALORFP777JP · 11 jobs · 2025-12-29

  13. 13Evergreen Fire Protection Inc

    L&I EVERGFP967LZ · 9 jobs · 2026-04-01

  14. 14A F P Systems Inc

    L&I AFPSYI*091BZ · 9 jobs · 2020-07-28

  15. 15Burns Fire Prtctn Systems Inc

    L&I BURNSFP841DU · 6 jobs · 2016-01-13

  16. 16Unlimited Mechanical Inc

    L&I UNLIMMI093M6 · 4 jobs · 2018-09-17

  17. 17First Defense Fire Prot LLC

    L&I FIRSTDF981RP · 4 jobs · 2018-04-06

  18. 181st Choice Fire LLC

    L&I 1STCHCF770OF · 2 jobs · 2026-09-08

  19. 19Element Fire Sprinklers LLC

    L&I ELEMEFS773DL · 2 jobs · 2026-05-28

  20. 20Shilo Automatic Sprinkler Inc

    L&I SHILOAS113MS · 2 jobs · 2021-04-28

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This list is city-wide for Seattle. Enter your address and we will narrow it to fire-protection contractors who have done jobs near you, check every license for standing and disciplinary history, and hand back a ranked shortlist you can call.

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Top 20 fire-protection contractors by Seattle job history

  1. Reliance Fire Protection Inc

    L&I RELIAFP102L1

    Preston, WA

    36 yrs licensed139 relevant jobs315 total jobsLast job 2026

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  2. Viking Auto Sprinkler Co

    L&I VIKINAS373NT

    Seattle, WA

    63 yrs licensed112 relevant jobs216 total jobsLast job 2026

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  3. Crown Fire Protection Inc

    L&I CROWNFP044LL

    Mill Creek, WA

    30 yrs licensed107 relevant jobs563 total jobsLast job 2026

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  4. Cascadia Fire Protection LLC

    L&I CASCAFP833L2

    Puyallup, WA

    9 yrs licensed100 relevant jobs647 total jobsLast job 2026

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  5. Ace Fire System LLC

    L&I ACEFIFS908M3

    Buckley, WA

    16 yrs licensed65 relevant jobs95 total jobsLast job 2026

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  6. Eclipse Fire Sprinklers LLC

    L&I ECLIPFS783DP

    Algona, WA

    4 yrs licensed26 relevant jobs51 total jobsLast job 2026

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  7. Fire Protection Systems LLC

    L&I FIREPSL981K9

    Kent, WA

    24 yrs licensed17 relevant jobs60 total jobsLast job 2026

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  8. Stewart Fire Protection LLC

    L&I STEWAFP893PR

    Snohomish, WA

    15 yrs licensed17 relevant jobs52 total jobsLast job 2022

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  9. Advanced Fire Protection Inc

    L&I ADVANFP199B6

    Woodinville, WA

    45 yrs licensed17 relevant jobs355 total jobsLast job 2022

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  10. Advanced Fire Protection LLC

    L&I ADVANFP772QC

    Lewiston, ID

    2 yrs licensed17 relevant jobs355 total jobsLast job 2022

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  11. First Fire Protection

    L&I FIRSTFP756CL

    Washougal, WA

    1 yr licensed16 relevant jobs16 total jobsLast job 2021

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  12. Valor Fire Protection LLC

    L&I VALORFP777JP

    Sandpoint, ID

    3 yrs licensed11 relevant jobs17 total jobsLast job 2025

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  13. Evergreen Fire Protection Inc

    L&I EVERGFP967LZ

    Puyallup, WA

    22 yrs licensed9 relevant jobs130 total jobsLast job 2026

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  14. A F P Systems Inc

    L&I AFPSYI*091BZ

    Tualatin, OR

    35 yrs licensed9 relevant jobs12 total jobsLast job 2020

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  15. Burns Fire Prtctn Systems Inc

    L&I BURNSFP841DU

    Granite Falls, WA

    10 yrs licensed6 relevant jobs31 total jobsLast job 2016

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  16. Unlimited Mechanical Inc

    L&I UNLIMMI093M6

    Marysville, WA

    35 yrs licensed4 relevant jobs12 total jobsLast job 2018

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  17. First Defense Fire Prot LLC

    L&I FIRSTDF981RP

    Snohomish, WA

    23 yrs licensed4 relevant jobs42 total jobsLast job 2018

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  18. 1st Choice Fire LLC

    L&I 1STCHCF770OF

    Bonney Lake, WA

    3 yrs licensed2 relevant jobs5 total jobsLast job 2026

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  19. Element Fire Sprinklers LLC

    L&I ELEMEFS773DL

    Orting, WA

    3 yrs licensed2 relevant jobs2 total jobsLast job 2026

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

  20. Shilo Automatic Sprinkler Inc

    L&I SHILOAS113MS

    Nampa, ID

    37 yrs licensed2 relevant jobs2 total jobsLast job 2021

    Job types: Fire Sprinkler And Suppression

    View license, job history & disciplinary records →

Most established Seattle fire-protection contractors

Longest-licensed firms based in Seattle that hold the right L&I class, oldest license first.

How this ranking works

Organic results require an active L&I license, the correct class for the trade as the firm's primary or tied fit (a mechanical company that also holds an electrical license does not lead the electrician list), and at least one job-relevant city building record in this city. They are ranked by the number of relevant jobs, then by how recently the firm worked, then by how long the firm has been licensed. This reflects license standing and real city building records - it is not a workmanship guarantee. L&I does not publish a disciplinary file, so a clean record is not part of this ranking. Promoted entries, when present, are paid placements and are not scored by these rules.

Confidence: high. The job type and the license class both match this trade.

Frequently asked questions

Which fire-protection contractor has done the most fire-protection jobs in Seattle?
Reliance Fire Protection Inc has done the most fire-protection jobs in Seattle of any firm holding the matching L&I class: 139 jobs, most recently in 2026. It has held L&I license RELIAFP102L1 for 36 years. That count includes only city building records whose type matches fire-protection work in Seattle's own records, and only firms that hold the matching L&I class as a primary or tied specialty, so a firm with a larger pile of unrelated jobs does not rank here. Jobs are counted per license number, and a firm holding several licenses is counted on its busiest one. Seattle records run through 2026-10-19.
How are the best fire-protection contractors in Seattle ranked?
Organic results require an active L&I license, the correct class for the trade as the firm's primary or tied fit (a mechanical company that also holds an electrical license does not lead the electrician list), and at least one job-relevant city building record in this city. They are ranked by the number of relevant jobs, then by how recently the firm worked, then by how long the firm has been licensed. This reflects license standing and real city building records - it is not a workmanship guarantee. L&I does not publish a disciplinary file, so a clean record is not part of this ranking. Promoted entries, when present, are paid placements and are not scored by these rules.
Is this ranking a guarantee of quality or workmanship?
No. It reflects Washington State Department of Labor & Industries license standing, longevity, and real city building records - not the quality of any individual job. Always verify a contractor on the official L&I Verify a Contractor and check references before hiring.
How current is this Seattle contractor data?
Seattle city building records through 2026-10-19, verified against the Washington State Department of Labor & Industries licensing records, snapshot dated 2026-08-16. The two datasets age separately: the board publishes licensing snapshots on its own cadence, and Seattle publishes city building records on its own. This page regenerates daily.

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