London's trusted window installation service — call us for a free site survey.

Get a quote

Get In Touch

Contact Golden Ratio Windows

Ready to restore, repair, or replace your windows and doors? Get in touch with our expert team for a free, no-obligation site survey and quote anywhere in London.

Send a Message Call: 020 3488 1695

★★★★★ "Incredible workmanship — our sash windows look brand new." ★★★★★ "Responded quickly and gave us a competitive quote the same day." ★★★★★ "Draughts completely gone. Warm house for the first time in years." ★★★★★ "Friendly, professional, and very tidy carpenters." ★★★★★ "Restored our Georgian windows beautifully. Highly recommended." ★★★★★ "Golden Ratio really know their sash windows inside and out."

Trusted & Accredited

Get a Free Quote

Fill in the form below and we'll get back to you within one working day.

Business Address

218 Hornsey Road
London
N7 7LL

Contact Details

02034881695 07507391329 quote@goldenratiowindows.co.uk

Opening Hours

Monday – Friday: 8am – 4:30pm
Saturday: 8am – 3:30pm
Sunday: Closed

What Our Customers Say

Verified reviews from homeowners across London who trust us with their windows and doors.

London's Finest

Why Golden Ratio?

Unrivalled Expertise

From the planning stage to the finished article; we are with you every step of the way, making sure you are completely satisfied with the end result.

FENSA Registered

We are fully FENSA registered and compliant with all modern building regulations, ensuring a secure and certified installation every time.

Outstanding Service

Rest assured you will be receiving a professional, yet personal service. We are happy to answer any queries and provide accurate quotes for any work.