About us

SJB Sash Windows is a family-run business specialising in the manufacture and installation of traditional timber sash windows, serving the London area since 2001. Our range of subtle products and services are designed to improve energy efficiency whilst maintaining curb appeal & architectural integrity.

We specialise in manufacturing, fitting and servicing sash windows. You can count on our expert and experienced staff to provide a trustworthy service that will go beyond your expectations. Whether you need new sash windows or your existing windows repairing we have exactly what you need at prices you can afford.

At SJB Sash Windows we cover all stages of sash window ownership, from fitting / installing (or reinstating) new sash windows through to repairing and replacing existing wooden sash windows. All our new sash windows and box frames are manufactured to order and installed by our own specialists and our work is fully guaranteed for your peace of mind.


sash windows


Each quotation we supply is tailored to our customer’s individual requirements. The replacement windows are bespoke built in order to ensure an authentic reproduction.

Being a family company with a wealth of experience, we believe we can provide our customers with a high quality yet affordable solution for upgrading your timber sash windows.

At SJB Sash Windows our highest priority is satisfied customers. You are important to us and you can expect us to go the extra mile for your business. Superior customer service is the hallmark of SJB Sash Windows. We are proud to serve you and work hard to earn your business.  

At SJB Sash Windows our goal is to provide you with a courteous, expedient, professional service of the highest calibre. Before any job commences, we are of course happy to answer any questions you may have about our company or our services.

We offer the highest quality of product and services on the market today. We provide a superior service to our customers and have pride in assisting them achieve their goals. Our years of experience and commitment to excellence have earned us the reputation as the best sash window specialist in the area.

WHY choose our windows?

  • Bespoke, hand-crafted timber sashes
  • Constructed using the original style and design to fit your home
  • Low maintenance and easy to look after
  • Save up to 41% on heat loss
  • Effective double-glazing – options available
  • Draught proofing included as standard
  • Family run business
  • Great prices available


“Everything that was done was perfect. Absolutely recommend, Steve and his team are conscientious, reliable and first class workers.”

“I’d definitely use them again for future work and wholeheartedly recommend them to others.”

“Definitely recommended, everything is thoroughly done and methodical. Very courteous and polite.”


At SJB Sash Windows you will receive the kind of quality and service you expect from a leader. Our company is always evolving as the needs or our customers change and as new opportunities are created in the market. You can rest assured that working with SJB Sash Windows you will enjoy the latest services, technology and developments in the industry.


We make it our responsibility to know you and your business. We work closely with you to ensure that the solutions we provide are tailored to meet your unique needs and challenges. We are committed to your success.

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