Smart Design Tips for Multi-Generational Living in Pennsylvania

At Ironstone Homes, we’ve seen first-hand how multi generational living has become a defining trend in Pennsylvania housing.

Pew Research reports that nearly 18% of Americans are part of multigenerational households as of 2021 — more than twice the share in 1980. In Pennsylvania, where housing prices in Philadelphia suburbs are steep, the Lancaster and Harrisburg housing markets are tight, and family members often want to live close together for convenience and the ability to age in place, more families are choosing to share one roof. Multi generational homes can bring financial benefits, emotional well being, and practical support — but they require careful planning and smart design choices to balance different generations living under the same roof. 

We build custom homes in the greater Lancaster-Chester County area, and our team has the experience to help bring your multigenerational, in-law living to life. Let’s explore this compelling trend in a little more detail.

First, What Types Of Multi-generational Living Are There?

Accessory Dwelling Units (ADUs)
These are secondary housing units on the same property as a primary house. ADUs can be detached structures or part of the main home, offering privacy while keeping family close.

In-Law Suites or Quarters
An in-law suite is a dedicated space within the house that includes a bedroom, bathroom, and sometimes a kitchen or kitchenette. It allows aging parents or extended family to live under the same roof with comfort and independence.

Dawdy Haus
Often just another term for the ADU, traditionally seen in Pennsylvania plain communities, a dawdy haus is a small, secondary home built next to or attached to the main residence, often for elderly family members. These homes support many generations sharing one property.

The Benefits of Multi Generational Homes in Pennsylvania

Financial Benefits

We see many families looking at multi generational homes as a way to share mortgage and utility expenses. These homes can also help avoid the steep costs of elder care or childcare. In Pennsylvania, average childcare costs surpass $12,000 annually, while assisted living for elderly parents can range from $4,000–$5,000 per month. That’s money families would rather invest in a home that supports multiple generations.

Convenience & Caregiving

Living under one roof makes it easier to support aging parents, young people, and everyone in between. The help is built right into the household.

Stronger Family Life

Grandparents, parents, and adult children can share quality time, offer daily support, and enjoy private spaces when needed.

Resale Potential

We’ve noticed growing demand for in laws suites, extended family living arrangements, and multigenerational floor plans. Homes with these features stand out in Pennsylvania’s competitive housing market.

Design Features That Make Multigenerational Living Work

When we design these homes, we’ve leared first-hand to focus on two thibngs: flexibility and privacy. That often means:

Separate Entrances & Suites
In-law suites with a full bathroom, bedroom, and kitchenette let family members stay connected while still maintaining independence.

Dual Kitchens or Expanded Kitchen Layouts
Nothing causes friction faster than crowding at mealtimes. Extra kitchen space or simply fully separate kitchens let multiple generations cook side by side.

Flexible Living Arrangement Spaces
From sitting rooms to bonus spaces, secondary family rooms, and finished basements, these areas provide the personal space different generations need.

Soundproofing & Privacy
We recommend adding extra insulation between walls and floors to create a sense of separation between adult children, grandparents, and parents.

Accessibility Features
Wider hallways, zero-step entryways, and first-floor bedrooms help elderly parents and older generation residents stay comfortable for years.

Pennsylvania Zoning & Building Considerations

Local township rules and county zoning laws often determine whether in-law suites or accessory dwelling units (ADUs) are allowed.

Lancaster County and the Philadelphia suburbs, for example, may have different requirements. At Ironstone Homes, we help families navigate these regulations and build homes that can legally and comfortably accommodate extended family.

Smart Design Tips for Harmony (Beyond the Basics)

We’ve learned that harmony in multigenerational living comes from thoughtful details:

Storage & Shared Responsibilities
Oversized pantries, mudrooms, and garages with organizational systems make it easier for family members to share responsibilities.

Outdoor & Communal Spaces
Porches, patios, and decks allow everyone to gather in communal spaces while keeping private spaces indoors.

Smart Home Technology
Zoned climate control, keyless entry, and security systems give different generations flexibility and peace of mind.

Future-Proofing with Careful Planning
We encourage families to design for aging parents today — adding walk-in showers, wider doorways, or even leaving space for future accessibility features like elevators.

The Emotional Impact: It’s More Than Just a House!

For us, a multigenerational home is about family life: grandparents reading to kids in the sitting room, adult children supporting elderly parents with daily needs, and extended family members finding balance between personal space and quality time. These living arrangements offer emotional well being, stability, and deeper bonds under one roof!

Ready to Build Your Own Multi Generational Home?

At Ironstone Homes, we believe multi generational homes are one of the smartest investments a Pennsylvania family can make. These homes bring shared responsibilities, financial benefits, and stronger family ties. With careful planning and design, they can meet the needs of multiple generations living under one roof with ease!

Thinking about a multigenerational home for your family? We are a ADU builder in Lancaster, and we’d love to chat. Let Ironstone Homes build a home that balances personal space and communal spaces for every stage of family life. Give us a call to learn more!

FAQs

1. What defines a multigenerational home?
   A multigenerational home is a house where at least two adult generations live together under one roof. This often includes grandparents, parents, and adult children, but it can also mean extended family like in-laws. The goal is to share resources and space while still maintaining personal space for each family member.
2. How much does it cost to build a house with an in-law suite in Pennsylvania?
   Costs vary depending on size, finishes, and local labor rates, but many in-law suites add anywhere from $60,000–$120,000 to the cost of a new build. A full custom multigenerational home can range from $350,000 to over $600,000 depending on square footage, location, and features like separate entrances or kitchens.
3. Are in-law suites legal everywhere in PA?
   Not every township or municipality allows in-law suites or accessory dwelling units (ADUs). Some areas have zoning restrictions or require special permits. At Ironstone Homes, we help families review local codes and design floor plans that comply with Pennsylvania regulations.
4. What are the disadvantages of living in a multigenerational family?
   While multigenerational households bring many benefits, they can also create challenges. Families sometimes face conflicts over privacy, shared responsibilities, or personal space. Without good communication, different generations may feel crowded or overwhelmed. Soundproofing, flexible layouts, and clear agreements can help reduce these issues.