Preserving London's architectural heritage with traditional craftsmanship and modern techniques. Over 20 years of excellence in sash window restoration, draught proofing and double glazing. Trusted by homeowners across Greater London with a 9.81/10 rating on Checkatrade from over 140 verified reviews.
Whether you need sash cord replacement, timber frame repair, draught proofing or slim-profile double glazing, our specialist team delivers exceptional results that preserve the character of your period property while improving energy efficiency and comfort.
Get Free Quote View Our ServicesComprehensive sash window solutions combining traditional craftsmanship with modern techniques. We offer a full range of services for traditional timber windows and doors across Greater London.
Complete restoration bringing windows back to their original glory while improving functionality and energy efficiency. Our restoration process includes thorough inspection, careful timber repair, cord and weight replacement, and professional finishing. We use traditional techniques combined with modern materials to ensure your windows operate smoothly and look beautiful for decades to come.
Eliminate cold draughts with our specialist sealing systems designed specifically for period sash windows. Draught proofing can reduce heat loss through windows by up to 50 percent, significantly lowering your energy bills while maintaining the original appearance and operation of your windows. We use a combination of brush seals and compression seals for maximum effectiveness.
Upgrade to slim-profile double glazing while maintaining the traditional heritage appearance of your sash windows. Our specialist double-glazed units fit into existing window frames without any visible change from the outside, providing improved thermal insulation, noise reduction and energy efficiency. Ideal for properties in conservation areas where maintaining original aesthetics is essential.
Expert repair and restoration of French doors and casement windows throughout London. Our experienced team handles all types of door and window work, from minor adjustments to complete overhauls. We work with traditional timber French doors, fire doors, bifold doors and exterior doors, ensuring every installation meets both aesthetic and functional requirements.
Transform your home with beautifully crafted interior shutters. Our premium plantation shutters are custom-made to fit any window shape and size. Available in full height, tier-on-tier, cafe style, bay window and shaped configurations. Choose from premium hardwood, MDF or waterproof ABS for bathrooms. Every shutter is built to order with a choice of colours to complement your interior design.
Additional Services: Bay Windows, Window Shutters, Porch Installation, Frosted Windows
Over two decades of excellence in preserving London's architectural heritage. We are a family-run business specializing in the restoration, repair, and maintenance of traditional sash windows throughout London and the surrounding areas. Our team combines deep knowledge of period architecture with modern repair techniques to deliver results that stand the test of time.
Founded by Marcin Czarkowski, our company has built a reputation for reliability, quality craftsmanship and exceptional customer service. Every project receives our full attention, from initial consultation through to final inspection. We take pride in our 9.81/10 rating on Checkatrade and the trust placed in us by over 140 satisfied customers.
9.81/10 Checkatrade Rating | 20+ Years Experience | 1000+ Projects Completed | London & Surrounding Areas
9.81/10 average rating from over 140 verified reviews on Checkatrade.
Marcin was efficient, punctual, very polite and a hard worker. He replaced two faulty sash cords and adjusted the weights in both sides of the sash windows. He left the room cleaner than when he arrived.
Marcin did a fantastic job in repairing sash windows and ledges in my property. He is a complete professional, respectful with absolutely no fuss. Highly recommend.
View All Reviews on CheckatradeExceptional service — really knowledgeable, friendly and considerate, and an outstanding result. Cannot recommend this service any more highly.
Sash window repair costs in London typically range from 150 to 500 pounds per window, depending on the extent of damage and type of repair needed. Cord replacement starts from around 150 pounds, while full restoration including timber repair and draught proofing can cost 300-500 pounds. We provide free, no-obligation quotes for all work.
A single sash window restoration typically takes 2-4 hours depending on the condition. Cord replacement is usually completed within 1-2 hours. For a full house of windows, we typically schedule 1-3 days. We always discuss timelines during the free quote visit.
Yes, we specialize in retrofitting slim-profile double glazing into existing sash window frames. This preserves the original heritage appearance while significantly improving thermal insulation and noise reduction.
We cover all of Greater London and surrounding areas. Our team regularly works across Central London (SW1, WC1, WC2, EC), South London (SW, SE), West London (W, TW), North London (N, NW) and East London (E).
Yes, all our work comes with a comprehensive guarantee. We use premium materials and traditional techniques combined with modern solutions to ensure lasting results.
Draught proofing involves fitting specialist seals around sash windows to eliminate cold air infiltration. It can reduce heat loss through windows by up to 50 percent, significantly lowering energy bills.
For like-for-like repairs and restoration, planning permission is generally not required. However, if your property is listed or in a conservation area, there may be restrictions.
We offer full height, tier-on-tier, cafe style, bay window and shaped shutters. Available in premium hardwood, MDF and waterproof ABS for bathrooms. All custom-made to fit your windows.
Contact us today for a no-obligation consultation and quote. We offer free site visits across London and surrounding areas.
Phone: +44 789 403 8297
Email: sashwindow.service@yahoo.com
Service Area: London & Surrounding Areas
Opening Hours: Mon-Fri 8am-6pm, Sat 9am-2pm
Checkatrade Verified — Member since February 2015