Buying a Window Cleaning Business
Why Searchers Target Window Cleaning
Window cleaning is a low-barrier route business with a durable core. Storefront and commercial accounts billed on monthly retainers renew with low churn, often 2 to 5% a year for a good operator. A downtown block of storefronts is the densest possible route, many small jobs within walking distance. The field is deeply fragmented and a natural roll-up, so exits are visible. It is distinct from the janitorial trade: this is exterior, height-exposed work, from ground-level storefronts to water-fed-pole mid-rise and rope-access high-rise, and that skill and safety layer is what keeps casual competition out. The economics turn on how much of the book is recurring commercial route work versus one-off residential and project jobs.
What Window Cleaning Businesses Trade For
Window cleaning trades inside the marketplace's cleaning and janitorial class, where sold-business quartiles ran 1.57x to 2.66x SDE from 2021 through 2025 with the median near 2.07x. The class names window cleaners among its specialized trades, so the figures are the publisher's own classification of this work and not a substitution of ours. A searcher buys at the SDE end, so anchor there; a book of diversified monthly commercial contracts earns the top of the range while a business leaning on a few accounts or on lumpy one-off work sits at the bottom. Where a specific business lands is mostly the recurring commercial share and the customer concentration the next sections cover.
Recurring Routes Against One-Off Work
The core split is recurring commercial route work versus one-off jobs. Monthly storefront and commercial retainers are contractually recurring, low-churn, and route-dense, so they are the revenue a buyer pays a premium for; one-off residential cleans and one-time high-rise projects are real but lumpy and win-again each time. Concentration is the paired risk: a book leaning on one property manager or a single large building can lose a big share on one non-renewal, so a well-diversified route of many small accounts is worth more than the same revenue from a few. Read the split of recurring versus one-off, the route density, and the account concentration before crediting the trailing number.
Labor, Height, and Insurance
Three things decide the real business. Labor is the biggest cost, commonly half to sixty percent of revenue, and turnover runs high, so crew retention and whether workers are W-2 rather than 1099 both matter. A seller using contractors for what are really employees is a misclassification liability a buyer inherits. Height is the distinct risk: mid-rise and high-rise work carries fall exposure, OSHA rules, and rope-access or lift requirements, so the safety record and training are diligence items a janitorial deal would not have. Insurance is the gate: general liability, workers' compensation, and commercial auto are required, and commercial accounts demand a certificate of insurance, so a poor safety record raises the premiums.
What to Verify in Diligence
The record to assemble before the offer holds:
- Recurring commercial contract share versus one-off residential and project work
- Route density and jobs per crew per day, which decides whether the book absorbs another account or needs another crew
- Customer concentration and contract diversification
- Labor as a share of revenue, crew turnover, and W-2 versus 1099 status
- Safety record, OSHA history, and height or rope-access training
- Insurance limits and the workers' compensation experience modifier
- Equipment condition, water-fed-pole and lift assets, and any deferred capex
Financeability Notes
Window cleaning finances under SBA 7(a), and lenders read recurring commercial contract revenue more favorably than one-off residential work. Expect underwriting to weigh customer concentration, the labor structure, and the safety record, since a misclassification exposure or a poor workers' compensation history is a liability a lender prices. Model debt service net of a market wage for a crew lead and a manager if the seller works routes, net of the fair labor cost if contractors are being reclassified to employees, and net of the equipment capex the work needs. The margin risk to underwrite is wage pressure against contracts that cannot be repriced quickly, so read the labor share and the contract terms, not just the trailing profit.
Terms in This Industry
Glass cleaner VOC cap
Glass cleaners face a federal VOC cap nationwide, and California sets a tighter limit.
Frequency mix
How often each account repeats, which is what turns a job list into a route.
Recurring commercial route
Commercial accounts cleaned on a monthly retainer, not one-off residential jobs.
Certificate of insurance (COI)
Proof of the coverage a commercial client demands before it will hire a contractor at all.
Rope descent work
High-rise cleaning done on suspended rope, which needs certified anchors and trained crews.
Hazardous weather stop
The federal rule that stops rope work in wind and deliberately names no number.
Business contract renewal
The renewal rules that reach a commercial book, since consumer law does not.
What the Data Says
The marketplace's cleaning and janitorial class, 797 businesses sold from 2021 through 2025, shows a $260,000 median sale price, $433,327 median revenue, and a 2.19x average earnings multiple; window cleaning sells inside this blend, so treat the figures as the class's, not the niche's.
Source: Valuation multiples for a cleaning company (Peak Business Valuation)
Cleaning and janitorial valuations have risen, with the average earnings multiple growing from about 2.0 in 2021 to 2.3 in 2025 and the median sale price reaching roughly $325k, and well-diversified books command a premium over concentrated subcontractor operations.
Source: Cleaning and janitorial valuation benchmarks (BizBuySell)
Wages alone run about 43 percent of receipts across commercial janitorial, the census class window cleaning sits inside, and that share excludes payroll taxes and benefits because the economic census does not collect them for service industries. Labor is the largest line in the business by a distance, so how a company classifies its cleaners decides how much of that line is genuinely fixed.
Enter earnings to apply this industry's cited band.
A sanity check against asking prices, not a valuation.
Holding a live deal in this industry? Underwrite it with the comps, cited band, and charge-off rate pre-loaded.
Compare bands across industries in the cited multiple bands by industry.
Who Else Is Buying in This Industry
Buyers is the shelf these come from, ordered by who closed something most recently.
What It Costs to Replace the Owner
The multiples above are quoted on SDE, which adds the owner's pay back into earnings, so they hold only if you do the owner's job. Hire someone instead and the going rate for the role comes back out. For this trade that is usually the crew leader over grounds and exterior work, paid a median of $58,430 a year nationally. Subtract it from SDE before applying any multiple, because at a 3x multiple that wage also takes about $175,290 off what the business is worth to you.
First-line supervisors of landscaping, lawn service, and groundskeeping workers, BLS Occupational Employment and Wage Statistics (2025), national, all industries, before payroll taxes and benefits. Every role, and the same arithmetic worked end to end, is in Manager Wages.
The Numbers That Run This Business
- Recurring commercial contract share versus one-off
- Route density and jobs per crew per day
- Customer concentration and contract diversification
- Labor as a share of revenue and W-2 status
- Safety record and workers' comp experience modifier