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Aditya Kasturi | Realogics Sotheby's International Realty

House-Hacking Guide

Let part of the house pay the mortgage. An ADU or lower-level unit can turn a stretch into a fit.

Washington property used for investment and rental planning.

Investment and Rental

What this article helps you decide

> House-hacking - living in the home while renting a portion - helps Eastside buyers make a high payment work and start investing. Here's how to evaluate it.

Work through the decision in order

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House-Hacking 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.

House-Hacking Guide decisions

Questions about House-Hacking Guide

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

Q1What is house-hacking, exactly?+

Living in the home while renting part of it — an ADU, a lower-level unit, or rooms — so the rent offsets your payment. It's how buyers make a high Eastside payment work while starting to invest, using owner-occupied financing.

Q2What formats work here?+

An ADU or detached DADU (Washington has loosened ADU rules — verify local zoning and permits), a separate lower-level unit, roommates, or a small owner-occupied multi-unit. Legal, separate units command more rent and are easier to finance and insure.

Q3What's the financing advantage?+

Owner-occupancy. Living in the property lets you use owner-occupied loan terms — lower down payment, better rate — than a pure investment loan, which materially improves the numbers versus buying a separate rental.

Q4What do I confirm before counting the rental income?+

Zoning, permits, and any owner-occupancy requirements with the city. Unpermitted units can't be legally rented or counted, and financing and insurance depend on the unit being legal — verify before you bank on the income.

Q5What's the honest downside?+

You're a live-in landlord. Shared walls or a tenant on the property is a real lifestyle trade-off, and turnover and maintenance still apply. The numbers can be great; the question is whether the arrangement fits how you live.

Q6How do I find a house-hack-friendly property?+

Look for legal ADU/DADU potential or an existing separate unit in a zoning that permits it. Finding those properties and running the numbers is part of a Real Estate Review.

Apply the article to the live decision.

Want to buy with an income unit built in? Let's find house-hack-friendly Eastside properties in a Real Estate Review.

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Last updated: August 2, 2026

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