Professional
Window Cleaning Services
That Elevates Your Business

Dirty windows create negative first impressions and suggest neglect, while clean ones boost tenant satisfaction and reduce complaints. With over 25 years of hands-on experience, East Coast Window Cleaning is the top choice for commercial window cleaning in Delaware.

We clean windows inside and out, plus handle messy post-construction cleanup for buildings up to three stories tall. We don’t work on high-rises, but this focus enables us to give each job the personal care and excellent results that smaller buildings deserve every time.

Our crews clean four to five commercial properties daily, ensuring quick professional turnarounds. Post-construction window cleaning services remove paint, dust and adhesive residue completely. Regular window cleaning eliminates liability hazards like bird droppings and cobwebs that violate safety codes. This prevents hard water stains and pollution damage. 

Transparent Pricing for
Commercial Window Cleaning
Clear, honest pricing

Pricing Breakdown

We use a pane-based flat-rate model for small businesses and retail locations to give you predictable costs based on your specific needs.

  • Minimum charge: $299
  • Typical job range: $299–$1,500 for storefronts or mid-size commercial buildings
  • Post-construction add-on: $75–$300 based on level of debris and labor

Cost Factors

Several elements determine your final price: 

  • Pane count and window type: French and divided-light windows require hand-detailing. 
  • Height: Second and third stories incur extra safety/setup charges. 
  • Access challenges: Landscaping, obstructions or ladder work. 
  • Interior vs. exterior cleaning: Adding interior windows increases the price by 30–50%
  • Debris severity: Water stains, sap and calcium buildup require specialty treatment. 
  • Furniture movement: $25–$50 if our staff must move furnishings. 

Exact pricing is always customized upon request based on your building’s specific requirements. 

Special Offers and Discounts

We offer several ways to save: 

  • Recurring contracts: 10–20% off depending on frequency. 
  • Multi-service bundles: 10% off when combined with house washing, gutter cleaning or roof cleaning. 
  • First-time commercial clients: Up to 15% discount. 

All discounts are tailored based on building size and service frequency. 

Surfaces and Window Types
We Clean
for All Kinds of Businesses

Our commercial window cleaning in Delaware covers: 

Commercial Glass Panels and Storefront Windows

Commercial Glass Panels and Storefront Windows

Our professional storefront glass cleaning uses carbon fiber water-fed pole systems with purified water from our four-stage system. This equipment reaches up to three stories without scaffolding. Most jobs need no ladders, ensuring safe, streak-free results with a zero-residue finish. We use soft-bristle brush heads to loosen grime safely. 

Interior Glass and Office Partitions

Interior Glass and Office Partitions

Our team uses handheld tools, including microfiber mop applicators, an ammonia-free soap blend, squeegees and lint-free towels for interior and exterior office window cleaning. We wear shoe covers and place towels under the glass. Detailed edge finishing ensures crystal clarity. 

Post-Construction Windows

Post-Construction Windows

These projects involve the careful removal of paint specks, silicone, and concrete dust using non-abrasive scrapers and specialized degreasing agents. Due to the additional labor required, this service is billed as an add-on to our standard cleaning. We take special care to protect tempered, tinted, and coated glass surfaces during the process. 

Why East Coast Window Cleaning
Is the Smart Choice for Your Property

This is why we are trusted to provide expert commercial window cleaning in Delaware. 

Safety record icon

25+ Years Without a Single Safety Incident

The crew maintains a zero-incident track record and a commitment to safety protocols. Our full insurance coverage includes over $1 million in liability protection.

No subcontractors icon

No Subcontractors—Only Vetted Professionals

All technicians wear uniforms and undergo background checks and drug testing before joining our team. We only send people into your business that we’d trust in our own homes.

After-hours cleaning icon

After-Hours and Weekend Cleaning at No Extra Cost

We work around your business schedule, including nights and weekends, to minimize disruptions to your operations or customers.

Advanced tools icon

Advanced Tools, Superior Results

We use carbon fiber poles, purified water systems, and commercial-grade machines for optimal results. Our ladder stabilizers protect your building’s siding and gutters when needed. Count on us to use biodegradable soaps to protect the surrounding landscaping.

Customer service icon

Customer-First Service Model

Every job includes before and after walkthroughs with follow-up calls and review requests. You choose your preferred communication method, whether via text, email, or phone calls.

Schedule Commercial
Window Cleaning Today

Our Proven
Window Cleaning Process
for Businesses

Here’s how we offer streak-free business window cleaning solutions for businesses of all sizes: 

Quote
and Scheduling

We handle quotes under 3,500 square feet remotely, while larger projects get in-person visits. We often schedule cleanings outside regular business hours. 

Exterior Setup and Safety Prep

Our crew places safety cones, connects hoses, and completes safety walkthroughs before starting work. We use your water source or bring our truck-mounted tank as an upgrade service. 

Water-Fed Pole Cleaning

We use purified water and soft-bristle brushes to scrub and rinse windows effectively. Our equipment reaches three stories safely from ground level. 

Interior
Hand Detailing

Our team covers shoes before entering and uses microfiber tools with ammonia-free soap. This includes detailed drying and complete edge cleanup. 

Final Walkthrough and Follow-Up

We conduct a walkthrough with you and handle any needed touch-ups. Expect a satisfaction check-in the next day and a review request. 

What Businesses
Say About Our Window Cleaning

Matt & colleague explained exactly what they were to accomplish in such a friendly & genuine manner. I have always had excellent results with this company.
I highly recommend ECWC! Their whole team is professional and very accommodating to ensure that your experience and windows are perfect!
Response from the owner:Thank you for highlighting our team's professionalism and accommodation. We're glad you had a great experience.
I just had my windows cleaned by this company. This company is so helpful and accommodating. The team was polite and respectful and approached the job with detail and a commitment to doing the job well. I very much appreciate their professionalism and service. I would recommend them for all needing this service.
Response from the owner:Thank you so much, Ger, for the wonderful review and for trusting us with your home! 🌟

We’re thrilled to hear you found our team polite, respectful, and detail-oriented. We work hard to deliver a professional experience from start to finish, so it means a lot to know that came through during your interior and exterior window cleaning.

If you ever need anything in the future—whether it’s windows, screens, or any of our other services—please don’t hesitate to reach out. We truly appreciate your recommendation and look forward to serving you again!

– East Coast Window Cleaning 🧼💧
I was very pleased with the Christmas lights that were installed. The guys were professional and courteous. I’ve had many compliments on how beautiful it looks. I would highly recommend.
Response from the owner:Thank you so much, Jodi! We’re thrilled to hear you love your Christmas lights and that our team made the experience a great one. We truly appreciate your recommendation and are grateful for the opportunity to decorate your home this season! 🎄✨

highly recommend did an awesome job inside and out
Response from the owner:We’re grateful for your 5-star review, Brenda. Your satisfaction with our service is truly appreciated.
Excellent professional service.
Response from the owner:Thank you so much Rachel! We’re glad to hear you were pleased with our interior and exterior window cleaning service. We appreciate the kind words and look forward to helping you again soon!

Thanks,
Pete
ECWC
Professional personable efficient my house decorated in Christmas lights is exactly what the picture showed and exactly what I wanted. I definitely would hire them again. I did sign up for a 3-year contract and requested an estimate for power washing of the house in the spring. Very pleased with their service
Response from the owner:Your satisfaction with our service is valued. Delighted to have met your expectations.
From scheduling the appointment to the completion of the window cleaning the entire process was smooth and flawless. For the price of each window it included cleaning inside and out, the sill and outside frame. The window cleaners were knowledgeable and paid careful attention to detail. They're reasonably priced. I will definitely be scheduling a house wash and window cleaning next fall.
Response from the owner:Thank you for your review! We're glad you had a smooth experience. Looking forward to your next visit.
Great company. Team was professional and did a fantastic job. !!
Response from the owner:Thank you for your review. We're glad our team's professionalism met your expectations with our service.
Great job; the Christmas lights look fantastic. Thanks a lot.

Frequently
Asked Questions

We typically schedule commercial window cleaning after business hours to avoid disruptions. If cleaning during open hours is necessary, we use safety cones and visual barriers to protect foot traffic and maintain compliance with public safety standards.

We work directly with property managers to ensure smooth access and coordination with building security. If your site has specific access procedures or loading dock restrictions, just let us know in advance and we’ll accommodate.

Yes, we provide flexible scheduling for commercial properties with multiple tenants or shared window spaces. We’ll work with the property manager to plan around tenant access, business hours, and building logistics.

We carry over $1 million in liability coverage and can provide proof of insurance, safety compliance documentation, or MSDS sheets upon request. Our crews are fully trained and follow strict safety protocols on every commercial window cleaning job.

We recommend notifying staff in advance and ensuring blinds are raised and interior furniture is moved away from windows. If interior cleaning is included, please clear access routes and secure any sensitive materials or equipment near glass areas.

No — we coordinate exclusively with the property manager or building representative. It’s the manager’s responsibility to notify tenants or occupants as needed ahead of our arrival.

Yes, we clean all types of commercial glass up to three stories high, including showroom windows, entry doors, and large panel curtain walls. We use purified water-fed poles and soft detailing tools to ensure safe, streak-free results on specialty glass.

We avoid cleaning during storms or extreme weather for safety reasons, but light rain typically doesn’t interfere with our process. We’ll reschedule at no extra cost if weather makes the job unsafe or ineffective.

For commercial accounts, we offer Net 30 payment terms by default. If your organization uses purchase orders or has special invoicing requirements, we’re happy to accommodate.

Yes — if the building exceeds 3,500 sq ft or has special access needs, we’ll conduct an on-site visit to provide a precise quote. For smaller storefronts or standard properties, we can often quote over the phone or by email.

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