Why Families Choose Multigenerational Plans
cite caring for aging parents as the primary reason
NAR 2025 Buyer Surveyof new homes now include multigenerational features
NAHB datahome design trend predicted for 2026
Redfin / ThumbtackTypes of Multigenerational Layouts
Six common ways plans accommodate extended family — from a simple attached suite to a fully separate unit.
A private bedroom, bathroom, and small living area connected to the main home, often with its own entrance and sometimes a kitchenette.
Two full primary-style suites — typically one on the main level for accessibility, one upstairs for added privacy. Increasingly common in 2026 plans.
A self-contained living space over an attached or detached garage, with its own kitchen, bathroom, and entrance — functionally similar to an ADU.
The whole home divided into two living zones connected by shared space, giving each generation real distance from daily noise and activity.
A finished lower level with its own bedroom, bathroom, and living area — common on sloped lots where a walkout basement is feasible.
A separate structure on the same lot, offering the most privacy and flexibility — including the option to rent it out if not needed full-time.
Built for Real Family Life
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From simple in-law suites to dual primary layouts, find a plan that fits your family.
In-Law Suite or Separate ADU? Know the Difference Before You Choose
An attached in-law suite typically shares some systems with the main home and is the simpler, lower-cost option. A fully separate ADU — whether above the garage or detached — offers more independence and, depending on local zoning, the option to rent it out when not needed for family.
If you are considering a fully separate unit, check feasibility and local regulations before choosing your plan.
Considering a separate ADU instead?
Check feasibility, cost, and local zoning requirements first.
Get ADU Report →Not sure what it'll cost?
Get a location-adjusted estimate before you choose your plan.
Get Cost Report →A Private Suite Costs More Than a Bedroom — Know Why
A simple bedroom addition is far less expensive than a fully self-contained suite with its own kitchen, bathroom, and entrance. The duplicated plumbing, electrical, and finish work in a true suite adds real cost — closer to building a small additional living space than a single room.
Get an accurate, location-adjusted estimate so you can compare suite types against your actual budget before committing to a plan.
Recommended Tools and Reports
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Browse Plans →ADU Feasibility Report
Considering a separate unit instead? Check feasibility and cost first.
Get ADU Report →Frequently Asked Questions
What is a multigenerational house plan?
A multigenerational house plan is designed to comfortably house extended family — often aging parents, adult children, or both — under one roof while still giving each generation real privacy. This can take the form of an attached in-law suite, dual primary suites, an above-garage apartment, or a fully separate detached unit.
What is the difference between an in-law suite and an ADU?
An in-law suite is typically attached to or part of the main home, sharing some systems and often connected by an interior door. An ADU (Accessory Dwelling Unit) is usually a more independent structure — either attached with its own entrance or fully detached — and in many areas can legally be rented out separately, which an in-law suite usually cannot.
Why are multigenerational house plans so popular in 2026?
Multigenerational living has been named a top home design trend for 2026 by multiple industry sources, driven primarily by the need to care for aging parents, rising housing costs that make shared living more practical, and a desire for built-in childcare and family support.
Does adding an in-law suite significantly increase build cost?
It depends on the type. A simple attached bedroom suite adds modest cost. A fully self-contained suite with its own kitchen, bathroom, and entrance costs more — closer to building a small additional living space — because of the duplicated plumbing, electrical, and finish work involved.
Can a multigenerational suite be converted to a rental later?
In many cases, yes — but this depends entirely on local zoning. Some jurisdictions treat an attached or detached suite as a legal ADU that can be rented, while others restrict it to family use only. Check local regulations before assuming a suite can generate rental income.
2026's Top Design Trend
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In-law suites, dual primary layouts, and private living wings built for how your family actually lives.