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The collection of house plans below include floor plans with an in-law suite (mortgage helper).

Luxury 7-Bedroom Two-Story French Country Home for a Wide Lot with Private In-Law Apartment (Floor Plan)

Specifications: Sq. Ft.: 5,100 Bedrooms: 5-7 Bathrooms: 5.5-7.5 Stories: 1-2 Garage: 5 Welcome to photos and footprint for a 7-bedroom two-story French country home. Here’s the floor plan: This French country home boasts luxury detailing with hipped and gable rooflines, stone siding, a charming turret, and wood trims accentuating the windows and entry. Inside, the …

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Two-Story Craftsman Style 4-Bedroom Home with 3-Car Garage and In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 2,556 Bedrooms: 3-4 Bathrooms: 2.5-3.5 Stories: 2 Garage: 2-3 Welcome to photos and footprint for a two-story craftsman style 3-bedroom home. Here’s the floor plan: A beautiful blend of clapboard and cedar shake siding brings an immense curb appeal to this two-story craftsman home. It features a 3-car garage that accesses the …

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6-Bedroom Rustic Two-Story Mountain Home with Balcony and In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 6,070 Bedrooms: 6 Bathrooms: 5.5 Stories: 2 Garage: 3 Welcome to photos and footprint for a 6-bedroom rustic two-story mountain home. Here’s the floor plan: This two-story mountain home radiates a rustic charm with its stately stone exterior, shuttered windows, decorative arches, and multiple gables graced with wooden brackets. The elegance continues …

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Two-Story 3-Bedroom Country Home for Sloped and Wide Lots with Elevator, Angled Garages, and In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 4,682 Bedrooms: 3 Bathrooms: 3.5 Stories: 2 Garage: 3 Welcome to photos and footprint for a two-story 3-bedroom country home. Here’s the floor plan: Clad in a board and batten siding, this charming two-story country home offers a sprawling floor plan with multiple gathering areas and lots of outdoor spaces that the …

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Modern 7-Bedroom Single-Story Farmhouse with Open Floor Plan and Lower-Level In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 2,389 Bedrooms: 3-7 Bathrooms: 2.5-4.5 Stories: 1 Garage: 2-3 Welcome to photos and footprint for a modern 7-bedroom single-story farmhouse. Here’s the floor plan: A beautiful combination of clapboard and board and batten siding complemented with rustic columns that frame the covered front porch bring an immense curb appeal to this single-story …

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Modern 3-Bedroom Single-Story Farmhouse with Wraparound Porch, In-Law Suite, and Bonus Level (Floor Plan)

Specifications: Sq. Ft.: 3,005 Bedrooms: 3 Bathrooms: 3 Stories: 1 Garage: 3 Welcome to photos and footprint for a modern 3-bedroom single-story farmhouse. Here’s the floor plan: Classic horizontal siding, an oversized 3-car garage, and a wraparound front porch topped with three gable dormers bring a great curb appeal to this single-story modern farmhouse. The …

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Two-Story Victorian Style 6-Bedroom Home for Sloped Lots with In-Law Suite, Bonus Room, and Wraparound Front Porch (Floor Plan)

Specifications: Sq. Ft.: 2,898 Bedrooms: 4-6 Bathrooms: 3.5-5.5 Stories: 2 Garage: 3 Welcome to photos and footprint for a two-story Victorian-style 6-bedroom home. Here’s the floor plan: This two-story Victorian home features an impeccable facade adorned with multiple gables, stone trims, a charming turret, and a wraparound front porch. Inside, the spacious foyer is nestled …

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Two-Story 5-Bedroom Mid-Century Modern Home with Bonus Room, Balcony Loft, and In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 5,993 Bedrooms: 5 Bathrooms: 4.5+ Stories: 2 Garage: 3 Welcome to photos and footprint for a two-story 5-bedroom mid-century modern home. Here’s the floor plan: Concrete panels, slanted rooflines, and a multitude of large windows lend a modern influence to this two-story Mid-century home. Inside, the great room and kitchen flow seamlessly …

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3-Bedroom Single-Story Contemporary Home for a Sloping Lot with In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 2,808 Bedrooms: 3 Bathrooms: 3 Stories: 1 Garage: 1 Welcome to photos and footprint for a 3-bedroom single-story contemporary home. Here’s the floor plan: Buy this plan Buy this plan A mixture of concrete, stone, and wood siding brings an immense curb appeal to this single-story contemporary home. A wonderful built-in pool …

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Two-Story 4-Bedroom Mediterranean Home for a Narrow Lot with In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 3,630 Bedrooms: 4 Bathrooms: 5 Stories: 2 Garages: 3 Welcome to photos and footprint for a two-story 4-bedroom Mediterranean home. Here’s the floor plan: This two-story Mediterranean home boasts a luxury floor plan that features octagonal rooms and a separate in-law suite on the upper level complete with a living area, kitchenette, …

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Single-Story 5-Bedroom Luxury Mountain Craftsman for a Wide and Side-Sloping Lot with In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 3,380 Bedrooms: 4-5 Bathrooms: 3.5-4.5 Stories: 1 Garages: 3 Welcome to photos and footprint for a single-story 5-bedroom mountain craftsman home. Here’s the floor plan: This mountain home exudes a craftsman charm with its brick exterior, board and batten siding, large shed dormers, rustic trims, expansive porches, and a grand arched entry. …

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4-Bedroom Two-Story European Home with In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 4,599 Bedrooms: 3-4 Bathrooms: 3.5+ Stories: 2 Garages: 2 Welcome to photos and footprint for a 4-bedroom two-story European home. Here’s the floor plan: This two-story European home flaunts an exquisite charm with its stone and stucco siding, varied rooflines, barn shutters, brick arches, and double columns framing the welcoming entry. The …

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Two-Story 6-Bedroom Contemporary Northwest Home with In-Law Apartment (Floor Plan)

Specifications: Sq. Ft.: 4,353 Bedrooms: 4-6 Bathrooms: 4-5 Stories: 2 Garages: 3 Welcome to photos and footprint for a two-story 6-bedroom contemporary northwest home. Here’s the floor plan: Northwest home with a contemporary touch showcasing a gray siding, gable rooflines, striking stone accents, and an enticing entry framed with tapered columns. Inside, the foyer has …

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5-Bedroom Two-Story Craftsman Home with Mother-In-Law-Suite (Floor Plan)

Specifications: Sq. Ft.: 4,206 Bedrooms: 5 Bathrooms: 4.5 Stories: 2 Garages: 3 Welcome to photos and footprint for a 5-bedroom two-story craftsman home. Here’s the floor plan: A combination of stone and brown board and batten siding embellish this two-story home. Rustic wood trims and brackets heighten its craftsman appeal. Inside, the foyer has extensive …

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Single-Story 4-Bedroom Florida Home with Separate In-Law Casita (Floor Plan)

Specifications: Sq. Ft.: 3,056 Bedrooms: 4 Bathrooms: 4 Stories: 1 Garages: 2 Welcome to photos and footprint for a single-story 4-bedroom Florida home. Here’s the floor plan: The single-story Florida home boasts a wide-open floor plan that ensures homeowners with optimum comfort and convenience plus an increased family bonding. The sleek entry opens to an …

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5-Bedroom Two-Story Tuscan Villa with In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 3,003 Bedrooms: 4-5 Bathrooms: 4 Stories: 1-2 Garages: 3 Welcome to photos and footprint for a 5-bedroom two-story Tuscan villa. Here’s the floor plan: Gable rooflines, a charming dormer, stone and brick exterior, and an arched entry create a character in this Tuscan home. As you stepped into the home, you’ll immediately …

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Two-Story 4-Bedroom Modern Home with In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 4,856 Bedrooms: 3-4 Bathrooms: 2.5-3.5 Stories: 2 Garages: 5 Welcome to photos and footprint for a two-story-bedroom modern home. Here’s the floor plan:   The two-story modern home flaunts an impeccable facade showcasing its multiple gables, stone and siding combination, double columns, and plenty of glazed windows. Upon entry, you are welcomed …

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6-Bedroom Two-Story Modern Farmhouse with In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 2,484 Bedrooms: 3-6 Bathrooms: 3.5-7.5 Stories: 1-2 Garages: 2-3 Welcome to photos and footprint for a 6-bedroom two-story modern farmhouse. Here’s the floor plan: The modern farmhouse features a great open floor plan that promotes convenient mobility and plenty of future and flexible spaces to fit the homeowner’s lifestyle. Inside, the foyer …

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Two-Story 3-Bedroom Red Cottage with In-Law Suite (Floor Plan)

Specifications: Sq. Ft.: 1,980 Bedrooms: 2-3 Bathrooms: 2-3 Stories: 1-2 Garages: 3 Welcome to photos and footprint for a two-story 3-bedroom red cottage. Here’s the floor plan: Large shed dormers, window trellises, stone columns, and an arched entry grace this two-story red cottage. The second floor of this house plan is dedicated to the in-law …

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3-Bedroom Single-Story The Montellano Spanish Home with Mother-in-Law Casita (Floor Plan)

Specifications: Sq. Ft.: 3,430 Bedrooms: 3 Bathrooms: 3.5 Stories: 1 Garages: 2 Welcome to photos and footprint for a 3-bedroom single-story The Montellano Spanish home. Here’s the floor plan: The single-story Spanish home has a well-laid out floor plan that boasts interesting amenities including an expansive covered porch, a beautiful courtyard with an outdoor fireplace, …

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I recently had the opportunity to visit my boss at her new home. It is gorgeous and while sitting by the pool, I noticed there is a separate, smaller house beyond the pool in her backyard. I inquired as to what the building was used for and she informed me that it is an in-law suite. She and her husband do not use it and we joked that I could move into it because her property is so pretty. Her husband’s mom lives in another state and stays in the main house when she comes to visit and my boss’ mom passed away years ago. I was intrigued by the idea of an in-law suite as it would be so convenient when I, or fellow grandparents, visit their grandchildren or need to help out the parents for a period of time. I researched in-law suites so I could learn more about them.

Related: Is an in-law suite worth renting out? | Types of In-Law Suites

What is an In-law Suite?

An in-law suite, sometimes also referred to as a mother-in-law suite, casitas, a granny flat, a secondary suite, a multigenerational unit, or as in Hawaii, an ohana unit, is a small house or another dwelling on the same property as a single-family home. This type of extra unit on a property can be used for an older family member who needs care or a family member or other person who is coming to help out with the children or other tasks around the house to move the family forward in their goals. It can be a separate space or it can be a room inside the main house that has its own bathroom and is located possibly in a basement or even over the top of a garage.

No matter what name you use to refer to an in-law suite, the unit and concept are becoming more and more popular in today’s busy world’s parents. Many parents need more help than ever before while juggling careers, children and their activities, along with other goals and pursuits. Many younger couples, when searching for a home to purchase, now consider an in-law suite a non-negotiable in one of the features they want in a house. They preferably want something that allows the family member that is coming to live with them their own space, including a bathroom, and it is even better if it has its own kitchen or kitchenette.

How Much Does an In-Law Suite Cost?

For families who want to add an in-law suite to an existing property, the cost for this popular amenity can vary quite a bit, depending on the size of the structure, the features of it, and whether it will be an addition to the home that has to be constructed as a standalone structure, or if it will involve renovating an already existing area of the home. One might expect to spend an average of around $32,000 to $63,000 if simply renovating an area of the home to turn it into an in-law suite and if you decide to build a completely new structure for your in-law suite, you can spend up to as much as $125,000, depending on what features you want to implement into the suite.

Future Selling Feature

The fun part about adding an in-law suite to your existing home is that should you decide to sell it in the future, it then becomes a great selling feature for your house. Many families need this extra space as an in-law suite or since it is very versatile, it cant be used for some other reason. Either way, it will definitely help you sell your home for a much higher price since it adds a lot of value to your home.

Other Uses for an In-Law Suite

As in the case with my boss, their separate structure that was meant to be an in-law suite is now being renovated as an office area which many families choose to do when not using the suite for in-laws or other family members. It can also be used as simply a guest room for family and friends who need to stay over or as a separate residence for an older child who wants their own space but is not quite ready to leave the nest.

An in-law suite is a great way to accommodate grandparents or others who come to help out with expenses, child care, or other reasons while maintaining the privacy of each family member. They are a great way for a family to live together on the same property but not have to be together too much overall.