.svg){kind=small}
North London
Premium windows in North London
%2520(1).webp&w=2048&q=75)
Built on Trust
★★★★★
%2520(1)_compressed.webp&w=640&q=75){kind=small}
-cropped%20(1).svg)
Timeless Style, Modern Performance
Your home's heritage deserves the best. Our bespoke windows honour tradition while offering exceptional insulation, security, and durability
Crafted to Endure
%2520(1).webp&w=1080&q=75)
Preserving Character
Modern Comfort
.webp&w=2048&q=75)
.svg){kind=small}
UK's Choice
2025
Industry Certified
Quality You Can Rely On
.svg){kind=small}
.svg){kind=small}
.svg){kind=small}
.svg){kind=small}
.svg)
Guarantee
with Harrington Windows
Our Accreditations
Quality is at our core
At Harrington Windows, we partner with accredited suppliers who meet high industry standards, ensuring our products offer superior performance, durability, and safety. This commitment means you can trust your windows and doors are built to last.
FENSA-Approved Installer
We're registered under FENSA, meaning every replacement window or door we install meets or exceeds building regulations. You'll receive a FENSA certificate upon completion as proof that your installation is fully compliant with UK building standards – covering critical factors like thermal performance and structural safety.
Visit FENSA-Approved Installer websiteClient Stories
Transformations that speak for themselves
Discover how our windows and doors have enhanced homes across the UK, bringing light, warmth, and character to properties of every style and era.
Bay Window – The Cotswolds
Our bay window is the heart of our home, and Harrington Windows made it even better. It floods the room with light, keeps the house warm, and looks absolutely stunning. The team was a pleasure to work with—polite, professional, and meticulous in every detail!
Sophie & Edward M.
The Cotswolds
Swipe left or rightClick and drag to view more testimonials
Why Trust Us
Why Choose Harrington?
Discover why thousands of homeowners across the UK trust Harrington Windows for their home improvements, backed by our commitment to excellence and customer satisfaction
Energy Savings
Energy Efficient Windows
Transform your home with our A-rated energy efficient windows, designed to keep your property comfortable year-round while significantly reducing your energy costs.
Lower bills by up to 40%
Our thermally efficient glass and frames create a barrier against heat loss, directly reducing your monthly energy costs
Consistent comfort all year
Enjoy ideal temperatures throughout every season, eliminating cold spots and drafts even during harsh winter months
Environmentally responsible
Reduce your carbon footprint while enhancing your home's value with sustainable, high-performance windows built to last
Trusted by
1,750+ UK Homeowners
Crafted by specialists
With over 25 years' experience
Premium Quality
Craftsmanship that Lasts
Enhance your home with windows that not only look beautiful but stand up to British weather year after year, protecting what matters most to you.
Built to last decades
Every window is crafted with premium materials and meticulous attention to detail for exceptional durability
Elegant, timeless designs
Clean lines and perfect operation ensure your windows remain stylish and functional for years to come
Enhanced property value
Quality windows that complement your home's character and increase its market appeal to future buyers
Peace of Mind
25-Year Comprehensive Guarantee
Invest with confidence knowing our comprehensive 25-year guarantee provides complete protection for your windows, giving you long-term peace of mind.
Complete coverage
Protection for frames, glass, hardware and seals against manufacturing defects and premature failure
Transferable protection
Guarantee stays with your property if you sell, adding genuine value to your home for decades
Simple claims process
Clear, straightforward terms and responsive service if you ever need to use your guarantee
Industry-leading protection
One of the UK's longest window guarantees
Independently verified quality
For your complete peace of mind
Industry Standards
Our Quality Accreditations
We maintain the highest industry standards through rigorous certification, giving you complete confidence in your window installation.
FENSA-Certified Installation
Every installation is registered with FENSA, providing you with an official certificate confirming compliance with building regulations and energy efficiency standards
GGF Member Standards
As Glass and Glazing Federation members, we follow strict industry codes of practice that protect your deposit and ensure excellent customer service throughout your project
Trading Standards Approved
Our business is independently verified for ethical practices and transparency, meaning you'll receive fair pricing and clear communication at every stage
Your
HomeismorethanWallsand
HomeismorethanWallsandWindows.It'sWhereLife
Unfolds,Memories
Unfolds,MemoriesForm,andSecurityisfelt.AtHarrington,we
UnderstandthisProfoundConnection.
Every
WindowweCreateEmbodiesthis
WindowweCreateEmbodiesthisUnderstanding.Wecrafteachwith
Artistry
ArtistryandIntention,turningthePlaceyouLive,intothe
HavenyouLove.
_compressed.webp&w=2048&q=90)
LIMITED TIME OFFER
Get 20% Off your Sash WindowsuPVC WindowsGeorgian WindowsTilt & Turn WindowsTimber WindowsCasement Windows
Elevate your property's appearance, energy efficiency, and security with our premium windows at a limited time 20% discount across our entire collection. Offer for new customers only
How we Work
Our Installation Process
Experience a seamless journey from consultation to completion with our expert window installation service
1. Free Consultation & Measure
1. Free Consultation & Measure
Our local experts visit your home to understand your requirements, take precise measurements, and provide tailored advice.
We take precise measurements of your existing windows and discuss your preferences for style, colour, and functionality. Our experts will assess your property's specific requirements and explain the best options available.
2. Detailed Design & Quote
2. Detailed Design & Quote
We create a made-to-measure window design that suits your home's style and provide a clear, no-pressure quote.
Based on your consultation, we'll prepare detailed CAD drawings of your new windows and provide a comprehensive quote with a breakdown of all costs. You'll have time to review and make any adjustments before proceeding.
3. Manufacturing
3. Manufacturing
Your windows are built to exact measurements using quality materials and skilled British craftsmanship.
Once your design is approved, we begin crafting your windows in our state-of-the-art facility. Each component is precision-engineered and undergoes rigorous quality control checks throughout the manufacturing process.
4. Professional Installation
4. Professional Installation
Our skilled fitters install your windows with minimal disruption, typically taking just 1-2 days per property.
Our installation team works efficiently and cleanly, removing old windows and fitting new ones with minimal disruption to your home. We use dust sheets and clean as we go to protect your property.
.webp&w=1080&q=75)
5. Final Inspection & Aftercare
5. Final Inspection & Aftercare
We conduct a thorough inspection and walkthrough, backed by our comprehensive guarantee and aftercare service.
After installation, we'll demonstrate how to operate and maintain your new windows. Our 10-year guarantee activates immediately, and we'll schedule any follow-up visits if needed.
Our Service Locations
Premium Window Installation Across the UK
West London
Premium windows in West London
East London
Premium windows in East London
South London
Premium windows in South London
Hertfordshire
Premium windows in Hertfordshire
Essex
Premium windows in Essex
Cambridge
Premium windows in Cambridge
Transform Your Home Today
Ready to Transform your Home?
Join thousands of satisfied homeowners who've trusted us with their windows. Book your free consultation now and receive a personalized quote within 24 hours.
30+
Years Experience
10k+
Windows Installed
100%
Satisfaction
10yr
Guarantee
Frequently Asked Questions
Everything You Need to Know
Get answers to the most common questions about our premium window solutions, installation process, and guarantees.
Quality Assured
FENSA registered with premium materials
10-Year Guarantee
Comprehensive coverage on all installations
5-Star Rated
Consistently excellent customer reviews
30+ Years Experience
Trusted by thousands of UK homeowners
Emma Thompson
London Homeowner
"I was hesitant about replacing our period home's windows, but Harrington made the process seamless. They perfectly matched the Georgian style while giving us modern energy efficiency. The team was professional from survey to installation, and the quality is outstanding. Our home is now warmer, quieter, and still maintains its character."
Verified Review
Ready to enhance your home?
Our window experts are ready to help you find the perfect window solutions for your home. Get in touch today for a free, no-obligation consultation and quote.
Can't find what you're looking for?
Contact our window experts