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Aditya Kasturi | Realogics Sotheby's International Realty

Multi-Gen / ADU Living Guide

More Eastside families are living multi-generationally - by design. Here's how to make it work with a home or an ADU.

Calm interior used for downsizing and transition planning.

Downsizing and Transitions

What this article helps you decide

> Whether aging parents or adult children, multi-gen living is rising on the Eastside. The two paths - a home built for it or an ADU/DADU added - each have layout, regulatory, and financing angles worth understanding.

Work through the decision in order

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Multi-Gen / ADU Living Guide

Use the worksheet without a form. Keep your notes in this browser, then bring the live facts into a Real Estate Review if the decision still matters.

Multi-Gen / ADU Living Guide decisions

Questions about Multi-Gen / ADU Living Guide

Clear answers first. If one question changes the deal, bring it into the review before you move money.

Q1What are the two ways to set up multi-gen living?+

A home built for it (a main-floor primary plus a separate suite or legal in-law unit) or adding an ADU/DADU. Each has different layout, regulatory, and financing angles — choosing between them is the first decision.

Q2What makes multi-gen living actually work day to day?+

Privacy: separate entrances, and kitchen and bath autonomy for each household. Setups that share everything strain; those with real separation and independence tend to last.

Q3What do I verify before counting on an ADU?+

Zoning, permits, owner-occupancy, and parking rules with the city. Washington has loosened ADU rules, but local specifics still govern what you can build and rent — confirm before you plan around it.

Q4How does accessibility factor in for aging parents?+

Heavily. A multi-gen setup for aging parents should include a main-floor or step-free suite and bathroom safety features. Designing for accessibility from the start avoids a second renovation as needs change.

Q5Does an ADU add value beyond housing family?+

Yes. A legal ADU houses family now and can become an income or equity asset later, adding flexibility a purpose-built in-law layout doesn't. That optionality is a reason to favor a permitted, separable unit.

Q6How do I find a multi-gen home or ADU-friendly lot?+

Screen for a suitable layout or ADU-permitting zoning, and confirm the rules before buying. Targeting those properties is part of a Real Estate Review.

Apply the article to the live decision.

Looking for a multi-gen home or an ADU-friendly lot? Let's target the right properties in a Real Estate Review.

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Last updated: August 2, 2026

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