Seattle DADU

CustomDADU Plans

Custom DADU/ADU Design Solutions

We’re experienced in working with residential clients to design custom DADU/ADU solutions to fit your property.

Our design/build experts have the knowledge and experience to help you navigate all of the requirements, options and possibilities, and build the /DADUADU that’s just right for your property, your budget and your intended use.

What is the difference between a DADU and an AADU?

A DADU (Detached Accessory Dwelling Unit) is a separate structure from the main home, typically in the rear of the yard. DADUs are also commonly known as an alley house, backyard studio, or backyard cottage.

An AADU (Attached Accessory Dwelling Unit) is an accessory dwelling unit that is attached to or inside the main home, which is why they are often referred to as a mother-in-law or in-law suite.

Customizable to fit your needs, these 1,000 sqft* AADUs or DADUs can be used for a vast variety of purposes. These ADUs typically have their own bathroom, kitchen, and private entrance. Used as a rental unit, guest house, home office, or personal sanctuary, many people throughout Seattle are now taking advantage of this newly passed legislation. You can too.

*Garages and storage do not count towards the maximum 1,000 sqft limit.

Lets Get Started

Ready to move forward with DADU permitting? Contact us for consultation today.


What is Included in the Semi-Custom DADU/AADU Package?

Pre-Design & Basic Design Service

Contact and engagement of required consultants on Client’s behalf

Creation of design/permit schedule and coordination of this schedule with project team

Coordination of project number creation and intake date scheduling

Project Design

Direct coordination with the designer which includes site design, floor plan design decisions and architectural guidance to the design

Meeting or time period set aside for client to review design and provide approval

Permitting (Building Permit)

Submission of all applications through City of Seattle Portal

Permit documents will be checked for quality, in an effort to reduce unnecessary correction cycles

Contact will be made with design team and SDCI reviewers on an as-needed basis to ensure timely response to submittal and correction items

Engagement in the project process beyond approved reviews, to ensure that holds in the SDCI System or other anomalies do not create undue delay to permit issuance