What Does It Actually Cost to Build a DADU in Tacoma?
One of the most common questions we get is simple:
“What does it actually cost to build a DADU?”
And the honest answer is… it depends.
But instead of staying vague, we want to give you real numbers and a clear breakdown—so you can understand what goes into the investment and what to expect if you’re considering building a backyard home in Tacoma.
Real DADU Starting Costs in Tacoma
We offer several pre-designed DADU options, with pricing based on the size, layout, and design of each unit.
Here’s where some of our current DADU designs start:
- Studio (460 sq. ft.) — starting around $186,000 + tax
- 1 bed / 1 bath (520 sq. ft.) — starting around $198,000 + tax
- 2 bed / 1 bath (705 sq. ft.) — starting around $240,000 + tax
- Garage + 1 bed / 1 bath (570 sq. ft.) — starting around $253,000 + tax
- Garage + 2 bed / 1 bath (701 sq. ft.) — starting around $285,000 + tax
- 3 bed / 2.5 bath (1,000 sq. ft.) — starting around $300,000 + tax
For larger or more complex builds, costs can go higher depending on the design and site conditions.
It’s important to note: these are starting prices, and Washington State sales tax is not included in the price estimates.
What’s Actually Included in the Price?
One of the biggest misconceptions we see is people comparing “price per square foot” without realizing what’s included.
Our DADU pricing is designed around a turnkey service, which means we handle the project from design through construction rather than simply handing you a shell and leaving you to coordinate the rest.
Depending on the DADU design, our standard inclusions are:
- Project management
- Design consultation
- Interior painting
- Kitchen cabinets
- Quartz countertops
- Appliances, including stove/oven, microwave, dishwasher, and refrigerator
- LVP flooring
- Electrical trim
- Plumbing trim
- Carpentry trim
- Heating and cooling
- An estimate of permit costs
We’re not just building a structure—we’re delivering a fully livable home in your backyard.
What Can Affect the Final Cost of a DADU?
Even with starting prices, no two DADUs are exactly the same. There are several factors that can shift your overall investment.
1. Size & Layout
More square footage generally means more materials, labor, and building systems.
The layout can also affect the cost. A simple studio will have different construction requirements than a two- or three-bedroom DADU, while designs that incorporate a garage or multiple levels can add additional complexity.
2. Site Conditions
The property itself can have a major impact on the cost of building a DADU.
Things like:
- Slope
- Site access
- Existing trees
- Soil conditions
- The location of the existing home
- Available space for construction
can all affect the amount of site work required.
This is one reason why a DADU price you see online should be treated as a starting point rather than a guaranteed final project cost.
3. Utility Connections
A new backyard home needs the appropriate utility connections, including water, power, and sewer.
The cost of connecting those utilities can vary significantly depending on your property and the location of the new DADU.
4. Customization
Our standard DADU designs provide a starting point, but homeowners may want to customize their space.
Upgraded finishes, changes to the layout, additional features, or a fully custom design can all increase the overall cost.
A Quick Reality Check: How Much Should You Budget for a DADU?
In today’s market, homeowners considering a turnkey DADU in Tacoma should be prepared for an investment of roughly:
$190,000 – $330,000+
That range is a general starting point based on the types of projects we build—not simply an estimate pulled from a national cost calculator.
And while that’s a significant investment, many homeowners build DADUs because of the flexibility they provide.
A backyard home can potentially be used for:
- Rental income
- Multigenerational living
- Housing for family members
- Additional living space
- Long-term property value
The right DADU can be both a practical addition to your property and a long-term investment.
Why We’re Transparent About DADU Pricing
We believe having real numbers upfront helps you make better decisions.
Building a DADU is a significant investment, and homeowners should have a realistic idea of the potential cost before they start the process.
If a DADU fits your goals, we’ll help you design something that makes sense for your property and budget.
If it doesn’t—we’ll tell you that too.
Thinking About Building a DADU in Tacoma?
Every property is different, which is why we always recommend starting with a conversation about your specific property.
We can help you answer:
- What would a DADU cost on your specific lot?
- What type of DADU makes the most sense for your property?
- What challenges, if any, do we see upfront?
- Which design best fits your goals and budget?
Our team can help guide you through the design, permitting, and construction process from start to finish.
Ready to explore your DADU options?
If you’re seriously considering building a detached accessory dwelling unit in Tacoma, we’d be happy to talk through your property, goals, and budget.