Prefab In-Law Suites

A Perfect Addition To Your Home

Whether you have an existing modular home, a traditionally built property, or are still in the process of creating it, an in-law suite can be the perfect addition. In-law suites, also commonly known as mother-in-law suites, are an excellent way to expand the available space in your home, either to welcome in guests for an extended stay or to give your family more room to spread out and relax.

As the area’s leading modular home construction team since 1966, Guardian Homes by Keystone is ready to erect your new space as soon as you’re ready. Start your journey today and have your prefab in-law suite at your door sooner than you thought possible.

Start Your Dream Home Journey

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Our Modular Home In-Law Suites

When our valued clients choose Guardian Homes by Keystone, they know they will receive a stunning modular space prefabricated to their precise needs. You bring the permits and land deeds, and we will handle your home, from helping you design the perfect space through the manufacturing, delivery, installation, and finishing. We even paint the walls and install the carpets so you’re ready to move in as soon as we’re done.

Though every build comes standard with certain features, you can also talk to us about adding special features. Our goal is to bring your dream space to life, so be sure to talk to us about anything you want to be included. We take our responsibilities seriously and put safety and efficiency at the top of our priorities. Once you choose or design your floor plan, we can start working on it right away.

Why Choose Our Modular Mother-In-Law Suites?

For more than 50 years, Guardian Homes by Keystone has served couples, families, and homeowners throughout Pennsylvania, Virginia, West Virginia, and Maryland by delivering incredible modular homes that look as good as their traditional counterparts and are ready in half the time.

Our in-law suites are prefabricated to suit your home’s existing style and provide all the rooms and special features your guests want. Even custom builds come with standard features like high-performance windows, custom cabinetry, and sturdy fiberglass tubs with a 30-year warranty. Once we’ve put on the finishing touches, your prefab mother in-law suite will be immediately livable, so you can get straight to the fun part of moving in.

Building for accessibility? Many families pair suites with rancher designs for single-level living.

Our Testimonial

Hear From Our Satisfied Customers

Thank you for our wonderful house. We truly appreciate the skill and craftsmanship of your builders and the accommodations Jason provided for us. The people who worked on site, especially Brad and Roger, took great pride in their work and were so patient and kind. Cap was a delight to work with and we felt completely at ease with his…

A. Helm and S. Bradfield

After we found our property we began to put on paper what we wanted our house to consist of. We went to a builder and two other modular companies. We were told that what we wanted could not be done. The other modular companies only gave us copies of their floor plans…Then we went to Keystone. That was the day…

Bonne Castell

From all aspects of planning, construction, and finishing my new home, your company and its employees provided outstanding service and quality and I am very grateful that I chose to purchase a Keystone Home.

John G. Cullen

We would just like to take this opportunity to say how pleased we are that we chose a Keystone home. You can be sure that when we are asked about our home we only have good things to say and we highly recommend Keystone homes. In fact, last weekend a young couple put a deposit on a two-story Keystone Homes…

Ken and Anne Warzyniak

I am writing to tell you how pleased we are with our Keystone experience.Having a house built when you live 1,000 miles away can be a scary and difficult experience. We talked to a lot of local builders and were not comfortable with any of them. We were ready to give up when we made a trip to your display…

Mr. and Mrs. Lynn Keiter

First of all I wanted to say we were very pleased with our home. My husband did his homework on a lot of different homes and of course Keystone Homes came out to be number 1 with us. And if anyone is interested in a modular home we recommend Keystone…We were very pleased with the inside & outside of our…

The Meyers Family

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71+

years of combined experience

1,000+

satisfied customers

120+

experts on our team

Your Ideal Prefab In-Law Suite Awaits

Guardian Homes by Keystone can’t wait to get started on your modular in law additions. Our wide range of housing styles and commitment to sustainable construction means any family can find something to love in our selection. Guardian Homes by Keystone is the premier modular homebuilder in the Mid-Atlantic region. We offer our decades of expertise to homeowners in Maryland, Pennsylvania, Virginia, and West Virginia. Explore our gallery to see the results you can look forward to.

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