Window Cleaning
Belfast
Crystal-Clear Residential & Commercial Window Cleaning Across Northern Ireland
Window Cleaning by DPMNI
Looking for spotless, streak-free windows all year round? At Diamond Property Maintenance (DPMNI), we provide professional window cleaning services in Belfast and across Northern Ireland for homes, shops, offices, and businesses of all sizes.
Whether it’s ground-floor glazing or three-storey glass, inside or out, we use the latest tools and purified water systems to leave your windows sparkling — without smears, ladders, or disruption.
Trusted by Homeowners, Landlords & Businesses
Why Choose Professional Window Cleaning?
Over time, windows gather dirt, water stains, pollen, and traffic pollution — especially in urban areas like Belfast. DIY window cleaning often leaves streaks and spots, while neglect can lead to long-term marks and corrosion.
Our expert team ensures:
Crystal-clear glass inside and out
No streaks, no smears, no residue
Safe cleaning up to 40ft with poles — no ladders needed
Reliable service from uniformed professionals
Regular or one-off visits based on your needs
For homeowners, landlords, shopfronts or office buildings, our service keeps your property looking sharp, clean, and well-maintained — all year round.
Our Window Cleaning Services
We provide a complete solution for all types of glazing:
Benefits of Regular Window Cleaning
Clean windows don’t just look good — they benefit your property and your wellbeing:
Whether you’re hosting guests, selling your home, or just want a clearer view, we’ll help you see the difference.
Frequently Asked Questions
Most of our customers book a clean every 4 to 8 weeks for best results. Properties near trees, roads, or the sea may benefit from more frequent service.
Yes. We can clean both interior and exterior glass. Let us know in advance and we’ll include it in your quote.
We use purified water that has no minerals or contaminants — so it dries clear, leaves no streaks, and is safe for your frames and seals.
Absolutely. We use extendable poles to clean windows up to 40ft high, including second- and third-storey windows — all from the ground.
Nope! Our system is self-contained. We bring our own water tanks and purified systems — so we don’t need to connect to your supply.
Only if we’re cleaning interior windows. For external-only service, you don’t need to be home — just ensure we have access to rear windows or gates
Six Reasons For People Choosing Us
Experienced Team
Our time-served tradesmen are PASMA and IPAF-trained professionals, ensuring safe and efficient service.
Comprehensive Insurance
We carry £10 million public liability insurance and specialized SSR insurance for your peace of mind.
Eco-Friendly Cleaning
We use child-safe, animal-safe, and plant-safe cleaning solutions to protect your environment.
Proven Track Record
With over 1,400 satisfied customers, we’re trusted by homeowners and businesses alike.
Tailored Solutions
Every job is unique, which is why we provide a free consultation and custom plans based on your needs.
Local Expertise
We understand the unique challenges in North Down and Antrim, tailoring our services to meet the specific needs of your area.
Ready to transform your property’s exterior?
Book a Window Clean Today
Our friendly, local team is ready to bring clarity to your glass and a shine to your space.
One-off cleans or regular maintenance — we’ve got you covered.
Other Exterior Cleaning Services We Offer
We provide reliable, efficient, and environmentally conscious cleaning for residential, commercial, and agricultural clients.
RoofCleaning
Remove moss, algae, and dirt buildup safely with our specialist Roof Cleaning service. Our team uses non-damaging techniques to restore the appearance and extend the life of your roof.
Gutter & PVCCleaning
Prevent water damage and keep your roofline looking sharp with our Gutter and PVC Cleaning service. We clear gutters, clean downpipes, and brighten fascias, soffits, and cladding.
WindowCleaning
Enjoy crystal-clear, streak-free results with our Window Cleaning service. We handle interior and exterior glass for homes, offices, and retail units across NI.
DrivewayResealing
Our Driveway Resealing service revives the appearance of block paving, tarmac, and concrete driveways while protecting against weeds, oil stains, and UV fading.
PressureWashing
We use commercial-grade equipment to powerfully remove grime, algae, and organic growth on patios, walls, car parks, and more. See results fast with our Pressure Washing service.
Solar PanelCleaning
Maximise your solar efficiency with safe, scratch-free Solar Panel Cleaning. We use purified water and soft brushes to prevent limescale and streaks.
SoftWashing
Our chemical-based Soft Washing method gently treats render, cladding, and painted surfaces without damage. It’s ideal for delicate exteriors and heritage buildings.
Farm YardCleaning
We provide heavy-duty Farm Yard Cleaning for agricultural clients across Northern Ireland. From silage pits to slurry-covered concrete, we get the job done safely and effectively.
Property & FacilitiesManagement
Need more than just cleaning? Our Property & Facilities Management service offers ongoing external maintenance solutions for landlords, housing providers, and businesses.