Sash Windows London


Offering New sash windows, sash window repair, double glazing and draught-proofing

Beautiful Sash Windows and Sash Window Repair in London by Ventrolla

"Wouldn't normally review but extremely impressed by this company. Can't fault the guys or the work done. Turned up on time, well organised, respectful, tidy and always happy to explain the work."

If you love the period charm and heritage innate in your wooden sash windows but hate the draughts, rattles, rot and heat loss that can also be part and parcel with an older property then you need help from Ventrolla, the original sash window repair company.

With over 35 years’ experience repairing sash windows across London, you can trust Ventrolla. We work on all types of domestic property from two up two down Victorian terraces, Georgian townhouses to Edwardian mansions and everything in between.

Ventrolla specialise in restoring the original timbers to leave you with beautiful, smoothly operating sash and casement windows free from rot, draughts and rattles. We are also experts in improving energy efficiency by installing double glazed sash windows into the original box frames to retain the period astheitcs while offering modern levels of heat retention. Our Secondary glazing option will reduce intrusion of outside noise and when the original timbers are not salvageable we can craft bespoke new windows that match the style of the existing ones.

Ventrolla London is accredited by CHAS, Constructionline and FENSA, ensuring both our residential and commercial customers receive the highest quality sash window repair and replacement services throughout the London area.

Services offered in London:

London Sash Windows - Sash Window Repair by Ventrolla

"Highly recommend the company. Friendly and knowledgeable surveyors. The tradesmen were very efficient, polite, kept me informed at all stages and trustworthy. 5* service."

Sash Window Repair, Replacement and Restoration

Residential customers
For residential projects including sash window repair and wooden double glazing we cover all of London, from the North to South, East to West, taking in Central London and the City. We offer a personal and friendly sash window repair and replacement service, working with homeowners and landlords to ensure we cover all our customers’ needs. We have many years’ experience working on Graded and Listed Buildings, as well as properties in Conservation Areas.
They’ve even worked on an exciting list of celebrity homes! But we didn’t tell you that…

Commercial projects
We cover all London postcodes for commercial sash window repair and full replacement projects, offering free, no obligation surveys, estimates and tender packages. We are happy to provide advice to businesses looking for a solution to both large and small projects. Our expert team of timber sash window specialists has many years’ experience working alongside architects, main contractors, designers and managing agents, from refurbishment and performance upgrade projects, to full bespoke replacement of windows and doors.

Make sure your window repair project is in safe hands. Our London team will ensure you’re left with amazing windos and a great experience.

Ventrolla | London Sash Windows 
Unit 5 Peacock Industrial Estate
20 White Hart Lane 
N17 8DT

Why Choose Ventrolla?

We’re consistently rated ‘Excellent’ by our amazing customers


From terrace house to manor house, restoration to full replacements, one window or a thousand … we can help. Get in touch with our friendly team today.

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Some Completed London Sash Window Restoration Projects


 Ventrolla has put its skills on public display by upgrading windows at an historic London Museum.

Housed within a Grade I listed 16th century manor house, Bruce Castle Museum in Tottenham contains local history collections and archives for the Borough of Haringey.


 Timber window renovation specialist, Ventrolla, has added a ‘touch of glass’ to London’s oldest hotel.

Most were in public areas such as the restaurant and tea lounge and have been fully draught-proofed and renovated as part of the project.


 Ventrolla checked in with a stylish boutique hotel in South Kensington to assist with a major restoration project.

The company was appointed by The Kensington Hotel to restore the period wooden sash windows on the building’s front elevation.