EP 447 | From Overwhelmed to Overjoyed: Five Business Lessons Every Interior Designer Needs with Diana Wagenbach
Some of the most valuable business lessons come from hard-earned experience—and in this episode, interior designer Diana Wagenbach shares the insights that transformed her business from overwhelmed to overjoyed. Kimberley Seldon sits down with Diana to break down five game-changing takeaways that every designer can apply, no matter where they are in their journey.
Diana talks about why waiting for the “perfect system” only slows you down, and how starting with the tools you have can spark real momentum. She sheds light on one of the biggest profitability killers in the industry—not tracking your time—and explains how consistent time-tracking leads to accurate estimating, healthier margins, and fewer surprise losses. The conversation also includes a candid look at saying no to the wrong projects, hiring with intention, and letting go of the myth that doing everything yourself is a badge of honor.
If you’re ready to streamline your workflow, increase profitability, and build a business that feels lighter and more joyful, this episode is packed with honest, practical advice you can use right away.
In this episode you will learn:
- Why you shouldn’t wait for the perfect time or system—start where you are
- The financial cost of underestimating time and failing to track your hours
- How consistent time-tracking protects your profitability and improves project estimating
- Why you must stop saying yes too soon (and too often)
- How hiring without defined roles leads to confusion and costly mistakes
- Why “doing it all” isn’t a badge of honor—and what to focus on instead
DESIGN INTERVENTION
If you want to go fast, go alone. If you want to go far, go together.
RECOMMENDED READING
A Guide to Business Principles and Practices for Interior Designers by Harry Siegel, CPA with Alan Siegel, Esq.
About Diana Wagenbach
With a background in marketing from Loyola University Chicago and formal training in interior design from the School of the Art Institute, Diana Wagenbach brings both strategic insight and creative vision to her namesake firm, founded in 2020. Known for her refined, intuitive approach, Diana leads every project with a clear purpose: to craft spaces that feel effortlessly serene, deeply personal, and quietly luxurious. Her hands-on involvement ensures each design reflects the client’s individuality, all while honoring the firm’s signature aesthetic—timeless, natural, and quietly compelling.
Watch this episode on YouTube
Thank you to our podcast sponsor, Aquavato!
Aquavato is a trade-focused plumbing showroom in Toronto designed to support interior designers with expert product guidance, educational support, and concierge level service. Inside, the House of Rohl Studio has curated selections of Perrin & Rowe, Rohl, Shaws, Victoria + Albert, Emtek & Schaub.
Learn more about the Aquavato Trade Program at aquavato.com.
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Legal Disclosure | This podcast is for educational purposes only and provides general business advice for interior designers and design professionals. It is not intended as individual legal, accounting, or professional guidance. Kimberley Seldon and Business of Design® make no guarantees regarding accuracy and are not liable for how information is used. Strategies shared may not apply to every situation—listeners should seek qualified legal, financial, or professional advice before making business decisions. References and resources mentioned may change over time.
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