To enrich the lives of our clients through thoughtful change and inspring design – this is the credo of Designtheory.

International award winning and published Principal Designers Leanne Tammaro and Adolphina Czyrsky provide the highest standard in design excellence, project oversight, and implementation. They bring a fresh and current perspective when designing interiors and are driven by the desire to create spaces that reflect their owners in the best way possible.

Each project is carefully and thoughtfully developed and designed by both Leanne & Adolphina, working closely together to create a well rounded design plan. At this junction each Partner strategically executes their specialty and develops a strategy for implementation. Their dedicated team of designers assists them in realizing each project from conceputalization to completion. Their projects include exclusive residential design and renovation, multi-unit residential development, condominium refurbishment, and high-rise condominium design.

Clients truly value Designtheory’s personalized attention, experience, integrity, and creative expression. Designtheory delivers inspired interiors that are, quite simply, exceptional.



Our team of creatives will develop your project with a tailored approach ensuring that you feel supported and comfortable throughout the design process. We understand that beginning a project can be overwhelming with the number of decisions that are required. We’re here to guide you through this process with our knowledge and experience, instilling confidence in your decisions and revealing all possibilities for your project.




We had been searching for an interior designer for a remodel of our newly purchased house in Toronto. After looking at a number of different designers, we were referred to Designtheory and we both loved their style. Upon meeting Leanne and Adolphina it was clear that we would enjoy working together and throughout the design process it felt as much like collaborating with friends as it did working with professionals. It has been six months since Designtheory helped transform our home, and friends and family always comment on how fantastic everything seems to work together. We could not give them a higher recommendation.

As a custom home builder, we recommend Designtheory Inc. to anyone in need of design support or such services requiring creative knowledge in this area. We are pleased to say we have received many positive comments on this projects outcome and are pleased to recommend Designtheory to our future clients. During the design process Leanne and Adolphina didn’t only see the clients overall vision but were able to communicate it to the rest of the team to support our build in a timely manner. They both showed a high level of dedication to the project, it was great to watch the project come to fruition.

Designtheory is first class Interior Design and Decor firm. The principles of the firm, Leanne and Adolphina have a keen eye for space planning, use of materials and an overall decor vision. Their style is modern elegance with an edge of glamour and grit, all delivered in a professional and comprehensive way. Its been a total pleasure working with Design Theory on 4 projects to date. Each with its own challenges and rewards. Lets keep it going ladies!

I was always skeptical about hiring designers until I met Leanne and Adolphina at DesignTheory. The reason I was skeptical was that when you hire a designer, you need to be ready for a third opinion, yours, your partners and then theirs! I wasn’t sure I could… but when I met the girls from DesignTheory, it was different… they had a very similar vision for my house as I did. They almost completed my sentences! I knew at that moment that they were the ones! And, just as I imagined, they were amazing! Not only did they know exactly what I wanted, they executed everything flawlessly.

When I moved into a new home after leaving a 20-year relationship I turned to DesignTheory to help me establish my new home. I could not describe what I wanted in terms of colour and things. I could only describe what I wanted in terms of its “spirit.” Adolphina and Leanne not only listened – they heard what I had to say and were able to translate my feelings and what I needed into tangible reality. They provided just the right balance between taking charge and making decisions with securing my opinion only on an as needed basis which suited me 100%. They never “forced an issue” but at the same time didn’t shrink from offering a strong opinion on what would be best with consideration for both aesthetics and functionality. They were completely transparent in all of their transactions and so my trusting them throughout the process was an easy thing for me to do. I guess the best testimonial is that 2 years later when I moved again – they were my first phone call!

Bottom line – Hire them… you will be in good hands. We recently hired Designtheory to furnish and decorate our new home’s living room, family room, and master bedroom. Based on their portfolio, we saw that their style evoked an eclectic, modern, and colourful feel which matched our taste. Adolphina and Leanne made the process very seamless and painless in many ways. All we had to do was convey our vision to them, and using their years of design experience, they were able to translate our vision into reality (and stay on budget). Adolphina and Leanne were also very accessible, always answering our questions and being very receptive to our feedback and concerns. Every step of the way, we felt like they truly cared about us being happy and putting together a high-quality finished product that we would enjoy. These ladies are true professionals and great people to work with, and I would trust them with our next project without a doubt.