The upside that draws families toward it
Having an aging parent under the same roof, or nearby in a secondary suite, means day-to-day support happens naturally rather than requiring a scheduled visit or a formal care arrangement — someone notices sooner if something's wrong. It also means shared household costs and, often, genuine value on both sides: grandchildren get more time with a grandparent, and a parent gets more built-in company and less isolation.
For families already leaning toward this, the honest question isn't whether the benefits are real — they generally are — it's whether the specific house and specific family dynamics can support it well.
The friction points worth planning for before moving day
Privacy and space are the most common sources of friction — a house that worked fine for one family unit doesn't automatically have enough separate space for two adult households to coexist comfortably long-term. This is worth being honest about before the move, not discovering six months in.
Role and authority questions come up too, especially in a parent's own home versus an adult child's home — who makes decisions about the house, the finances, the parenting of grandchildren living under the same roof. These aren't questions with a universal right answer, but families who discuss them explicitly upfront tend to have fewer conflicts than families who assume everyone already agrees.
When the current house doesn't fit the plan
Sometimes the honest conclusion is that the current house genuinely doesn't have room for a workable multigenerational setup, and that either significant renovation — like adding a secondary suite — or moving to a different property that does fit is the more realistic path than forcing it into a house that wasn't built for it.