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Multigenerational living has quietly become one of the most durable forces in American housing. Fourteen percent of recent buyers purchased a multigenerational home, near the record 17% set a year earlier. Behind the trend sits a practical question most articles skip: what do in-law suites, second kitchens, and converted garages actually do to a home’s value? As appraisers, we get to answer that one.

Why Multigenerational Living Became Mainstream

The National Association of Realtors 2026 Generational Trends report puts numbers on what families already feel. Gen X leads the trend, with 19% of buyers in that group choosing a multigenerational home. The top motivations are caring for aging parents, cost savings, and adult children moving back home.

None of those drivers is going away. Housing costs remain high, the population keeps aging, and baby boomers now account for 42% of all buyers, many of them moving specifically to be closer to family. So this is not a pandemic blip or a design fad. It is a structural shift in what a meaningful share of buyers need a house to do.

The Features Multigenerational Buyers Pay For

When families combine households, they are really buying privacy and independence under one roof. A few features deliver that consistently. A suite with its own entrance, bathroom, and sitting area lets a parent or adult child live semi-independently. A main-floor bedroom with an accessible bath serves aging relatives without a renovation later. Kitchenettes or full second kitchens let two households keep separate routines.

Flexible space matters almost as much as finished space. A basement that could become a suite, or a bonus room over the garage, gives buyers room to adapt. In neighborhoods where multigenerational demand runs strong, homes with these features often draw a deeper buyer pool and sell with less friction. But “often” is doing real work in that sentence, and this is where valuation gets interesting.

How an Appraiser Values an In-Law Suite or Second Kitchen

The honest answer: a feature is worth what the local market pays for it, not what it cost to build. Appraisers measure that through comparable sales. If homes with in-law suites in your area sell for more than similar homes without them, that difference is the feature’s contributory value. A $90,000 suite addition might contribute $60,000, or $110,000, depending entirely on local demand.

A quick example shows how this plays out. Two owners on similar blocks each spend $85,000 finishing a basement suite with a bath and kitchenette. One neighborhood has a steady stream of Gen X buyers housing aging parents, and suites there routinely command a premium. The other skews toward first-time buyers who just want the cheapest three-bedroom they can find. Same project, same cost, very different contributory value. Cost tells you what you spent. Only the market tells you what you got.

A second kitchen is the classic mixed signal. To a multigenerational buyer, it is exactly what they need. To others, it whispers “former illegal apartment,” and in some municipalities it raises real zoning questions about whether the home is being used as two units. An appraiser has to consider both the market’s reaction and the legal use of the property. The same feature can be a premium in one neighborhood and a mild drag in another.

Permits decide whether space counts at all. A garage converted to a bedroom suite without permits may not be included in the home’s finished living area, because unpermitted space carries legal and safety risk that lenders and buyers discount. Owners are sometimes shocked that their most expensive project added little on paper. The lesson runs the other direction too: a permitted, well-executed suite in a high-demand area is among the strongest value adds a home can have.

Buyers face the mirror image of this problem. Listings now advertise “in-law suite” and “related living” as premium features, and sellers price accordingly. Some of those premiums are earned. Others rest on unpermitted space, awkward layouts, or a second kitchen the city never approved. Before you pay extra for a multigenerational setup, it is worth knowing whether the feature will hold its value when you eventually sell, or whether you are buying someone else’s permit problem at a markup.

Check Three Things Before You Build or Buy

First, permits and zoning. Confirm that any existing conversion was permitted, and that your municipality allows what you plan to build. Second, the comps. If no home in your area has sold with a second suite, the market may not yet reward one, however useful it is to your family. Third, the resale pool. A design that serves your household beautifully should still make sense to the next buyer.

An appraisal answers the value side of all three before money moves. For buyers, it tells you whether the multigenerational home is priced on real contributory value or on wishful thinking. For owners planning a suite, it tells you what the market will likely give back. Either way, you decide with a number instead of a hunch.

Know What the Suite Is Worth Before the Market Tells You

PahRoo Appraisal & Consultancy values homes across the Chicago area and beyond, led by an appraiser holding both MAI and SRA designations. From a residential appraisal before a purchase or renovation to full appraisal services for estates, divorce, and tax matters, we put a defensible number on the property so your family can plan around it.