What’s the difference between an ADU and a guest house?

1 min read RemodelSD San Diego, CA

What’s the difference between an ADU and a guest house?

By RemodelSD | January 09, 2026 | San Diego

Terminology varies, but an ADU is typically a legal accessory dwelling unit that meets specific requirements for living (kitchen, bath, etc.). A “guest house” may or may not meet those standards depending on how it’s built and permitted.

Free Kitchen Remodeling Cost Calculator

Get an instant estimate for your kitchen remodel

Try Calculator

Ready to Start Your Project?

Free consultation with San Diego's trusted remodeling team.

Call (858) 434-7166 CSLB #1054602 · Serving all San Diego County