01753 858196 info@boxsash.com

Bespoke sash windows that last a lifetime
(and that’s guaranteed)

Preserve the heritage of your home with traditional sash windows, hand-crafted using time-honoured techniques and guaranteed for life.

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Looking for handsome, refined and original sash windows? You’re obviously someone who cares about the legacy of your period home. Welcome.

The Original Box Sash Windows Company combines experience, authenticity and long-established artistry to create stunning sash windows for homes just like yours.

They don’t simply add a traditional touch of elegance and grace, but they offer exceptional security and performance too. And each frame comes with a lifetime guarantee.

Every sash window we make is:

Super dependable, with frames and parts guaranteed for life, and glazing for 10 years

The exact same as a classic sash, just with improved energy performance

Matched perfectly to every bit period detailing in your home

Better for your insulation, security and sound proofing, with double glazing as standard

Beautiful! Giving you a home you can be proud of for years to come

Don’t just take our word for it…Check us out on Trustpilot

Nicola
Nicola
2020-02-06
Verified
We ordered new windows and internal doors from The Original Box Sash Windows Company. Now that they have been installed, we couldn't be happier. The windows have given a new elegance to the bedroom and the draft has gone. The doors look great, feel solid, and block out unwanted noise. The service has been consistently excellent - timely, polite, and helpful.
Patrick
Patrick
2020-01-31
Verified
This was the second time we’d used Original Box Sash. We chose them again because of the quality of the windows, the way they matched the Victorian originals while also providing effective double-glazing, and the tidy and effective implementation the first time round.
Mark Parsons
Mark Parsons
2020-01-28
Verified
This is the fourth time we have used The Original Box Sash Company. Our first set of seven windows were installed 10 years ago and are still in excellent working order. The whole process of installation is carried out in a friendly and professional manner. These windows are not cheap but are excellent value for money.
Miss Guzzo
Miss Guzzo
2020-01-21
Verified
Very professional from beginning to end, from site survey and estimate, second visit and to refurbishment and fitting. In every step of the process I was explained what it involved and what to expect. The fitters were very efficient, most respectful and considerate. They contained and managed well any unavoidable disruption. The refurbished windows look like new and certainly smooth to open and close and we can tell that our home is surely warmer and we have reduced greatly any heat loss. Highly recommend them. PS: finish of the fittings is of very good quality.
Mark
Mark
2020-01-11
Verified
We had new sash and casement windows made and some existing windows refurbishment. The original appearance of the house has been restored and its energy performance transformed. We were impressed at every stage of the process from our initial enquiry to the installation and are delighted with the results - a truly professional and friendly customer focused experience.
David Jackson
David Jackson
2019-12-16
Verified
We had the front bays and side windows fitted in our Edwardian house in December 2019. These complemented the sash windows at the back of the house that we had had fitted three or four years ago by OBSW Co. The sash windows are not cheap but they are good quality and made of hard wood. Steve, our fitter, was experienced and very competent. He was also polite and most helpful (for example he fixed a previously damaged curtain runner, that was over and above the call of duty). He arrived on time, worked long days and was extremely neat and tidy. He was in the house for 3/4 days but was always at pains to keep disruption to an absolute minimum. We have one small issue outstanding with the company but I am sure that this will be settled amicably. David Jackson (December 2019) It has now been settled, promptly and very amicably. D.J.
Keith Overton
Keith Overton
2019-12-03
Verified
I settled on the Original Box Sash Window Co after obtaining quotations from other similar companies. The windows supplied matched my expectations, look good and soundproof very well in my London Street - which can be a rat run. The fitters were excellent being clean and tidy, sheeting everywhere and vacuuming up afterwards. You would not have known that they had been there. I did not ask for new window frames but the sash windows were fitted perfectly to feel like new windows that glide perfectly in the old frame. An excellent company and an excellent job.
Mike and Valerie
Mike and Valerie
2019-11-21
Verified
Excellent all round - from detailed survey and planning to implementation. Installers quietly got on with it, working very thoroughly and carefully, making sure to check out details and options with us (e.g. for window furniture). Nothing was too much trouble. They were also very tidy and left no mess. We are very pleased with the results. Smoothly opening windows are a real joy and we are also noticing the benefits in terms of insulation and reduction in noise from outside.
Mr Birchall
Mr Birchall
2019-11-19
Verified
A professional and efficient service. I am very happy with both the new and renovated windows. It has made our front room much warmer on colder days; we now no longer have to close the curtains to be in the room.

Sash windows that don’t just look like the real thing; they are the real thing.

Unlike many sash window suppliers’ wares, an Original Box Sash window doesn’t just look like the real thing; it is the real thing, a solid hardwood window just like your originals would have been and that’s why we’ll give you a lifetime guarantee on any frame, as opposed to the standard 10-year deal.

We follow traditional methods to obtain a perfect fit and smooth operation. Faithful to the original way of doing things, we’ll only ever use solid hardwood; our choice is an African hardwood (Indigbo) which looks just like oak, is moisture and termite-resistant, easier to work with and lasts for a lifetime.

Now that we’ve been using our hardwood for more than 40 years, we can safely say that it’s proven its worth. So we’ll never compromise on quality or use treated softwood alternatives that could cause your sash windows to fail the test of time or result in expensive maintenance bills.

Your sash windows will be handmade in our traditional joinery in Wales, where we’ve been crafting away for five decades. Our shortest-serving employee has been with us for 20 years already, which means one thing: you won’t find a more experienced team to take care of preserving your home with elite sash windows anywhere.

We are experienced

Why choose The Original Box Sash Window Company?

The clue’s in the name. We’re called The Original Box Sash Windows Company because, well, we were the first ones in this business in London, and here we still are more than forty years on. You won’t find a team of window makers who’ll care more about creating the perfect sash windows for your home than us. But what else is in it for you?

Lifetime guarantee

All our sash window frames come insured by the Independent Warranty Association (and all glazing units come with a 10-year guarantee too), so you can be just as confident as we are.

Beauty and grace

Our sash windows don’t just glide efficiently in their hardwood frames and keep you safe and warm, but they look just as elegant as they did the day your home was finished.

Mouldings that match

We’ll study the original detailing at your home and create internal mouldings and outside features to match perfectly, so you’ll uphold its heritage for years to come.

Energy efficiency

Your windows will be flush-sealed and Argon-filled to prevent heat loss, so you can lower your energy bills without ever compromising on authenticity.

Superb security

Your sash windows will be fitted with your choice of multipoint locking mechanisms; from traditional deadlocks to mortice sash-locks and night-latches.

Sustainable sash windows

All our prime, natural African hardwood comes from Forestry Stewardship Council certified sustainable sources. It doesn’t just look good; it makes you feel good too.

Long-lasting and low maintenance

Your sash windows will be finished with high quality microporous paint, for durable, long-term resistance to the elements and easy maintenance. Because life’s easier that way.

Bespoke glazing

Enjoy standard double-glazed units with maximised insulation and sound proofing, and tailor the glazing to your exact requirements too; even curved glazing’s possible!

Total control

You’ll be in the driver’s seat from start to finish. Want to finish your sash window in a certain colour or add some stained glass? Just say the word and we’ll make it happen.

Get a quote

We’ll arrange a free quotation visit, no strings attached. We’ll assess your home, talk you through your options and provide you with a quotation for your new sash windows.

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