With home prices in San Diego where they are, more homeowners are asking the same question: Should we buy bigger, or build on what we already have? Adding an ADU, converting a garage, or remodeling can unlock serious value, but only if you avoid the permit and planning mistakes that quietly sink projects. We brought in our friends at Josh Renner Design, two native San Diego design pros, to walk through how it actually works. In this conversation, we cover when to bring in a designer, the costly mistakes to dodge, and exactly what California lets you build on a single-family lot. Watch the full interview to plan your project the right way.