SJI was established in 1993 to create, invigorate and regenerate town and urban centres.

SJI work in partnership with local communities to deliver quality designed environments to help invigorate and regenerate town and urban centres. It is through this that truly sustainable environments can be created which are fit for purpose and contribute positively to the communities they serve.

The team at SJI have delivered over 10 million square feet of successful development tto strengthen town and urban centres and their local communities.


To identify, consult and listen to stakeholders, engage in true debate which enhances development


To be reliable in delivering quality developments with a determination to overcome challenges in an open and honest way


To be perceptive, innovative and to see beyond the obvious embracing a holistic and strategic approach to address the diverse needs of stakeholders


To be personal and human-driven to create developments which celebrate shared values of individual communities-civilisation

Our philosophy is to be passionate about strengthening local communities through thoughtful development. The team at SJI have considerable experience and success in this approach. Our experience has shown us that successful partnerships with stakeholders create successful developments.

SJI is led by the dynamic couple Christopher and Yuliya Borkowski.

Christopher Borkowski


Inspirational Christopher Borkowski founded the Company in 1993 after serving as Property and Development Director for several Footsie companies delivering over 1,000 developments around the UK under his stewardship. Christopher was born and educated in London, graduated from the London School of Economics, where he had the privilege of rowing for the University and was President of AIESEC in the UK. In addition to his successful business career, he became committed to public and charitable organisations of which he has been a Chair, Director, Trustee, Governor, and elected Councillor. He became one of the youngest Chairs of a London Borough Planning Committee. He is known at the highest levels for his strategic planning and consistent successful delivery.

Yuliya Borkowski provides human intelligence and leadership and has been associated with SJI for nearly 20 years. She grew up in Russia during the collapse of organised government in 1990’s, learnt to manage and gain respect during this unstable period. Yuliya came to the UK to study and achieved a 2(1) Honours Degree from London University in Communications and International Relations. Her background has been excellent grounding for the international business community with its diverse cultures and priorities.

Christopher and Yuliya are happily married with a young daughter who enjoys school as well as regular visits to art exhibitions, opera, ballet and loves to ski, swim and sail.

Yuliya Borkowski