K-12 School Cleaning Prices in Seattle (2025)

Seattle Now Carries the Highest Wage Floor in This Entire Comparison

If you're pricing a school cleaning contract anywhere on the West Coast and want to know what the ceiling looks like, Seattle is it. The Bureau of Labor Statistics median wage for janitors and cleaners in the Seattle-Tacoma-Bellevue MSA is $22.35 an hour (SOC 37-2011, BLS OEWS May 2025; mean wage $23.74/hr), the highest median anywhere in this pricing family, ahead of even New York. Washington's statewide minimum wage has climbed steadily over the past several years, and SEIU 775 along with the local building trades maintain moderate-to-high union density across institutional and educational accounts, both of which push the floor up independent of any single employer's negotiating position.

Standard K-12 rates run $0.22 to $0.35 per square foot per month, with a $0.28 midpoint roughly 47 percent above the $0.19 national average, the widest spread in this entire comparison.

Secure Scheduling Rules Reach Further Than Most Bidders Expect

Seattle's Secure Scheduling Ordinance covers retail and food-service employers with 500 or more employees worldwide, and while most standalone K-12 school buildings don't fall under that definition directly, campuses with an on-site food-service operation run by a large national vendor can trigger partial coverage for scheduling and predictability requirements on the janitorial staff working that same footprint. That's a narrower compliance question than in Chicago, where Fair Workweek explicitly names building services as a covered industry, but it's worth checking on any campus with outsourced food service before finalizing staffing plans.

A standard contract at the $0.28 mid-rate covers nightly cleaning, restroom service, floor care matched to surface type, and consumable restocking. Persistent Pacific Northwest rain from October through April adds an entry-mat and lobby-floor management line to most contracts, priced as a seasonal item rather than folded into the year-round base rate.

Why Washington's Workers' Comp Classification Pushes the Burden Higher

Washington's workers' compensation system classifies janitorial work at a higher premium rate than most other states in this comparison, which pushes Seattle's burden toward the upper end of the typical 35 to 45 percent range rather than the lower end. Layering that heavier burden onto the $22.35 median produces a fully-loaded rate of $31.29 an hour, the top of the scale across every metro in this comparison. Contractors bidding public agency work should also confirm whether Washington's state prevailing wage law applies, since that can push wages higher still on publicly funded facilities.

Product Rules and Where to Confirm Seattle-Specific Requirements

Washington has no statewide green-cleaning statute specific to schools, though many Seattle-area districts and private schools specify EPA Safer Choice products by policy. ISSA's 447 production standard of 3,800 square feet per hour applies the same way here as elsewhere. Licensing steps for a Seattle-based cleaning company are detailed on the business license requirements page, and Washington's sales tax treatment of janitorial services is on the Washington sales tax guide.

School contracts in this city are priced off an ordinance that resets each January, mid-academic-year. The Seattle Minimum Wage Ordinance moved the rate to $21.30 per hour on January 1, 2026, and SMC 14.16 requires accrued paid sick and safe time for every covered hour, including seasonal summer restoration crews. Districts that award on an academic-year basis without building in the January step start the spring semester with a contractor working below the rate that was modeled, and the correction arrives as a renewal increase.

Worked Example: A 30,000-Square-Foot Private School in Ballard

Take a 30,000 square foot private school in Ballard bidding the "full campus plus wet-season entry management" tier at $0.36 per square foot per month. That's $10,800 a month, or $129,600 a year. That square footage against ISSA 447's 3,800-square-foot-per-hour standard works out to roughly 7.9 nightly labor-hours. At Seattle's burdened rate of $31.29 an hour, nightly labor cost runs approximately $247, before supplies, supervision, insurance, or margin. During the wet season from October through April, budget for the entry-mat and lobby-floor line to add another 6 to 10 percent to that figure, a seasonal swing worth naming explicitly in any proposal spanning a full school year rather than a single semester.