Timber Framed Box Sash Window
Double Glazed Sash London
Timber Framed Sash Window

Timber Box Sash Double Glazed Windows In London & Surrey

Supplied and fitted across Surrey and London

Get a Free Quote

If refurbishing your existing timber box sash windows isn’t an option, or you need new sash windows for an extension, we can help.

When you replace old sash windows in a period property, it’s essential to keep the look authentic. Especially if you live in a conservation area or listed building. Our timber box sash windows are the perfect choice. They combine the elegance of traditional sash windows with the added benefits of modern materials. No matter whether your style is Georgian, Edwardian or Victorian, we can match your windows to the period of your home. And sash windows aren’t just for period properties. They can add a traditional touch to a newer home too.

"Many thanks for doing a fantastic job on our bathroom timber box sash windows, I'm absolutely delighted with the work. Thanks also for being so professional – its always a worry letting someone into your home when you have to go out for the day but we could trust you completely.  Thanks again for a great job, I'm sure we will be contacting you again". - Dave

Traditional timber sash windows, but better

Warmer home

Double-glazed sealed units keep the heat in and cold out


Thicker double glazed sealed units block noise from outside and doesn’t rattle

No condensation

Warm edge spacer bars and argon gas-filled glass stops condensation

Smooth Operation

Effortless opening and closing

More energy efficient

Turn your heating down and save on energy bills

Add value

New sash windows increase your property’s resale value

Choose Novells for premium-quality timber sash windows

Our wooden double glazed sash windows are made from sustainably sourced timber. You can choose clear glass or a satin glass for a frosted, contemporary look.

All our windows arrive at your home pre-painted, and we give them a final coat, so there’s nothing left for you to do once they’re installed. And our windows meet building regulations too

We’re timber sash window experts –
it’s all we do

When you choose Novells, you can be sure you’re getting the best. Our timber sash windows team are highly skilled carpenters who have many years’ experience working with timber sash windows.

And we always treat your home like it was our own. We cover your furniture and floors with protective dust sheets and leave it exactly as we found it – except for the beautiful new windows, of course.

We work in Surrey and across London, from Balham and Clapham to Putney and Kensington.


Get a FREE no-obligation quote

Use the form on the right if you’d like us to call you. Or you can call us on 020 83951916. We’ll

  • Come to your home and chat about your needs
  • Take some measurements
  • Send you a free, no-obligation quote

See what our customers say about us

“Both Phil and Peter were professional, punctual, honest and courteous. Very happy with the work completed - attention to detail was superb. Left the rooms worked on spotless and now much warmer, quieter and no drafts.”
Mr M Jacobs, Balham
“Novells work came highly recommended. Lived up to high standard. Polite, hard-working and first-class quality work. 6 months on still very happy with my new windows.”
Jenny, Fulham