Guide

ADU vs. DADU: Which One Is Right for Your Property?

Understand the key differences between attached and detached accessory dwelling units, from cost and permitting to which property types suit each option best.

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Planning

How to Budget for Your ADU Project

From construction costs and permits to utility connections and contingency funds, learn how to plan a realistic budget for your ADU in the Puget Sound region.

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Regulations

Seattle ADU Permit Requirements: What You Need to Know

Navigate Seattle's zoning rules, setback requirements, height limits, and the permitting timeline so you can plan your ADU project with confidence.

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Tips

5 Questions to Ask Before Hiring an ADU Builder

Hiring the right contractor can make or break your ADU project. Here are the five essential questions every homeowner should ask before signing a contract.

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Design

Garage Conversions: Maximizing Value in a Small Footprint

Turning an underused garage into a livable ADU is one of the most cost-effective ways to add value and space to your property. Here's how to do it right.

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Market

Why ADU Demand Is Growing in the Puget Sound

New state legislation, rising housing costs, and shifting demographics are fueling an ADU boom across the Seattle-Tacoma metro. Here's what's driving the trend.

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Directory

Best ADU Builders in Seattle (2026): Top-Rated Contractors Compared

We compared the top-rated ADU builders in Seattle by experience, pricing, specialties, and reviews. Here are the contractors worth calling first.

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Planning

How Much Does an ADU Cost in Washington State? (2026 Guide)

A detailed breakdown of ADU costs by type, city, and project phase — plus financing options and ROI analysis for Puget Sound homeowners.

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Directory

Top DADU Builders in Tacoma: Licensed Contractors for Your Backyard Home

Find the best DADU contractors serving Tacoma and Pierce County. We profile the top builders, cover permit requirements, and break down typical costs.

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Regulations

HB 1337 Explained: How Washington's ADU Law Changes Everything for Homeowners

Washington's HB 1337 removed the biggest barriers to ADU construction. Here's what changed, who it affects, and how to take advantage of the new rules.

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