I want to talk about an offline business that almost nobody in the online money-making community ever mentions — despite the fact that experienced operators earn genuinely impressive daily rates from it, build substantial recurring income bases, and do so with extremely low competition from digital-native entrepreneurs.

Window cleaning. Let me walk you through why it’s such a strong business opportunity and exactly how to start.

Why Window Cleaning Works as a Business

The UK window cleaning market is worth £2.1 billion per year. Every home, every shop front, every office block, and every commercial building needs its windows cleaned regularly. Unlike many services, the need is purely functional and entirely repeatable — windows get dirty again within weeks, and customers who’ve found a reliable window cleaner rebook automatically cycle after cycle.

The most valuable thing in window cleaning is the round. A round is a collection of regular domestic or commercial customers in a defined geographical area who book you on a recurring schedule — typically every four to eight weeks. A well-built round of 80 to 120 domestic customers paying an average of £15 each generates £1,200 to £1,800 per cycle. When that cycle repeats every six weeks, you’re earning £10,400 to £15,600 per year from that round alone — before any commercial work.

The recurring, route-based nature of this income is what makes window cleaning genuinely different from most service businesses. You’re not constantly hunting for new clients. You show up, do excellent work, and the income regenerates automatically because the windows need doing again whether the customer books you or not.

The Equipment You Actually Need

Modern professional window cleaning uses a water-fed pole system rather than traditional ladders and squeegees for most residential and low-rise commercial work. A water-fed pole attaches to a pure water tank in your van, delivering ultra-pure water through brushes at the end of the pole. Pure water leaves no residue or streaks as it dries, producing a superior result to traditional methods without needing to ascend ladders for most jobs.

A good entry-level water-fed pole system costs £100 to £300. A small pure water tank and filtration system — which removes the minerals from tap water that cause streaking — costs £200 to £400. Combined with a suitable vehicle to transport your equipment, your total startup investment is under £600, making this one of the lower capital requirements of any outdoor service business.

Traditional squeegee and ladder methods are still used for commercial and high-rise work, but for building a domestic round from scratch, the water-fed pole system is the professional standard in 2026.

Domestic vs Commercial Work

Domestic window cleaning — houses, bungalows, and residential flats — is the backbone of most window cleaning businesses. Individual house prices range from £10 for a small terrace to £35 for a large detached property. At these prices, a productive day cleaning 25 to 35 houses earns £300 to £500 before expenses.

The key efficiency factor is route density. Cleaning eight houses on the same street in a single session is dramatically more profitable per hour than cleaning eight houses scattered across different parts of town. Building your round neighbourhood by neighbourhood — saturating one street before moving to the next — is how the most successful window cleaners build high-earning, efficient routes.

Commercial work offers higher individual job values and the possibility of monthly contracts that provide predictable recurring income. A small shop front cleaned weekly might earn £15 to £30 per visit — modest on its own, but across ten shop fronts on the same high street that can be cleaned in a single morning, it adds up meaningfully. A medium-sized office building cleaned monthly might earn £150 to £500 per clean. Landing one or two commercial contracts provides a stable income base that your domestic round builds on top of.

Getting Your First Customers

The most direct route to first customers is door-to-door canvassing in residential streets. Knock doors, introduce yourself professionally, and ask if they need a window cleaner. Many people who need a window cleaner simply haven’t got around to finding one — your showing up removes that friction entirely.

Nextdoor and local Facebook community groups are highly effective for window cleaning because they’re specifically local and because recommendation culture runs strong. A single post introducing yourself with a clear price list and a contact method typically generates multiple enquiries within hours.

Listing on Checkatrade, Rated People, and MyBuilder gives you presence on platforms where homeowners actively search for tradespeople. These listings are free or low-cost and generate enquiries from buyers who are already in decision-making mode.

Building to Serious Income

A round of 100 domestic customers — achievable within six to twelve months of consistent effort — generates approximately £1,200 to £1,800 per cleaning cycle. When your cycle runs every six weeks, that’s eight to nine cycles per year and £9,600 to £16,200 annually from domestic work alone.

Add one or two commercial contracts worth £500 to £1,000 per month each and you’re looking at total annual revenue of £20,000 to £35,000 as a sole trader — working four to five days per week, managing your own schedule entirely, and building an asset (the round) that has genuine saleable value when you eventually want to exit.

Many established window cleaning rounds sell for two to four times their annual revenue when owners retire or move on. A round generating £20,000 per year might sell for £40,000 to £80,000 — meaning the business itself becomes a significant financial asset over time.

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Frequently Asked Questions

Do I need to work at height and is it dangerous? Water-fed pole systems allow you to clean most domestic properties from ground level, eliminating the need for ladder work on the majority of residential jobs. For commercial and multi-storey work, appropriate safety training and equipment are required. Most domestic rounds can be built entirely without significant ladder work.

Do I need insurance for window cleaning? Public liability insurance is essential and protects you in the event of property damage or personal injury caused during your work. Window cleaning specific insurance typically costs £150 to £300 per year from specialist trade insurers. This is a non-negotiable cost of operating professionally.

How do I price a new customer’s windows for the first time? Visit the property and assess the number of windows, their size, and accessibility. Domestic pricing is typically straightforward once you’ve seen a few properties. Use a standard price list based on property type — terrace, semi-detached, detached — and adjust for specific factors like conservatory windows or particularly large glazing.

What happens in bad weather? You cannot clean windows effectively in heavy rain. Most window cleaners have an arrangement with their regular customers to rearrange in genuinely bad weather. Building some flexibility into your schedule allows you to shift days without losing income. Many customers are perfectly understanding about weather-related rescheduling when you communicate proactively.

How do I get customers to pay reliably? The most effective payment method for window cleaning rounds is GoCardless — a direct debit system that automatically collects payment from customers after each clean. This eliminates the awkwardness of collecting cash at the door and virtually eliminates late payment issues. Most professional window cleaners use direct debit systems for their domestic rounds.

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