Introduction

If you’ve been hearing the term DADU pop up in conversations, city newsletters, or even from neighbors and real estate agents you’re not alone. DADUs are having a moment here in Washington State (and beyond), and for good reason. But if you’re wondering what on earth is a DADU and why should I care? you’re in the right place.

Let’s break it down in simple terms.

So, What Is a DADU?

DADU stands for Detached Accessory Dwelling Unit. Think of it like a small home or apartment that’s built in your backyard or on the same lot as your main house but it’s separate, with its own entrance, kitchen, bathroom, and living space.

You might have heard people call them backyard cottages, guest houses, or in-law units. They all fall under the same category: a second, smaller dwelling on a residential property that already has a primary home.

Why Are DADUs Suddenly SO Popular?

There are a few big reasons:

• Zoning changes: In many Washington cities (including Tacoma and surrounding areas), zoning rules have shifted to encourage more housing options. Thanks to updates like the Home in Tacoma plan, DADUs are now allowed on most residential properties as long as there’s enough space and you follow certain design and permitting guidelines.
• No need to buy more land: One of the best parts of a DADU? You’re adding livable space to land you already own. That means no new property purchase just smart use of the space in your backyard.
• Affordability + flexibility: DADUs allow homeowners to create more housing either for family, rental income, personal office space or future needs without giving up their primary home.

What Can a DADU Be Used For?

This is where it gets exciting! A DADU can serve a variety of purposes, depending on your needs and lifestyle:

• Multigenerational living
  Have aging parents, adult children, or other loved ones who need independence but want to stay close? A DADU provides privacy and proximity perfect for family togetherness without feeling crowded.
• Rental income
  Want to offset your mortgage or build equity faster? Renting out a DADU (either long-term or as a short-term rental, where allowed) can generate additional income right from your own property.
• Home office, studio, or guest house
  DADUs can also be designed as quiet creative spaces, peaceful work-from-home zones, or the perfect setup for visiting friends and family.

But… Is My Property Eligible?

That’s the big question, and the answer might surprise you.

Due to recent city-wide zoning updates, most residential properties are now eligible to add a DADU regardless of whether you’re in a traditionally single family zone or not. The key factors come down to lot size, access, and existing structures.

Every property is different, and navigating city codes can be confusing but that’s where I come in. I help homeowners assess whether a DADU might be possible on their lot, and if so, what the next steps could look like. I also work closely with a local design build company that specializes in turning backyard dreams into real, livable spaces.

Final Thoughts

DADUs aren’t just a trend they’re part of a growing movement toward smarter, more flexible housing solutions. And for homeowners in the Pacific Northwest, they offer a powerful way to create more space, more options, and more value without having to leave the place you already call home.

Curious if your property might work for a DADU?
[Get in touch]—I’d love to walk you through what’s possible.