Expertly crafted traditional sash windows to last a lifetime

Preserve the beauty of your home with our traditional hardwood sash windows.

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Restore the original beauty of your period property with our bespoke sash windows.

Hand crafted from solid hardwood timber, we create authentic sash windows true to your originals.

Our traditional exacting joinery methods deliver a precise fit, maximum sound proofing, greater insulation and improved security.

Enhancing the beauty of your property, our sash windows will last a lifetime and so we confidently provide you with a lifetime guarantee.

Our experienced Estimators will provide all the advise and guidance you need.

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Every sash window we make is:

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The same beautiful classic sash style as your original

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Long lasting, with frames and parts guaranteed for life, and glazing for 10 years

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Delivers maximum insulation and sound proofing, with security prevention measures measures as standard

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Standard White, or with your specified colour

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Just stunning craftsmanship, giving you a home you can be proud of for years to come

HIGHLY experienced

Why choose The Original Box Sash Windows Company?

The original box sash window company established in London (hence the name), came from a passion to see period homes maintained to the highest standards. You won’t find a manufacturer who will care more about creating the perfect sash windows for your home than us. Many of our expert joiners, glaziers and painters have been with the company for ten, twenty and even thirty years, such is the love for their craft.

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 study the original detailing at your home and create internal mouldings and outside features to match perfectly, so you will 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.

Bespoke glazing

Enjoy standard double-glazed units with maximised insulation and sound proofing. We will tailor the glazing to your exact requirements, incorporating curved detailing too.

Colour

If you would like a different colour to white? that is no problem. We will make an exterior paint to match your chosen colour.

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

Nicola

2020-02-06

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

2020-01-31

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

2020-01-28

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

2020-01-21

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

2020-01-11

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

2019-12-16

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

2019-12-03

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

2019-11-21

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

2019-11-19

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.