42 House Plans with an In-Law Suite

House with in-law suites give guests their own living space. If you need a house plan with in-law suites, see our collection here.

Table of Contents Show

Our Collection of House Plans with an In-Law Suite

Three-Story 5-Bedroom Contemporary Home with In-Law Suite and Bonus Room (Floor Plan)

Specifications:

Sq. Ft.: 5,553
Bedrooms: 4-5
Bathrooms: 4.5-6.5
Stories: 3
Garage: 3

This three-story home is adorned with a contemporary exterior showcasing pristine white stucco beautifully contrasted by dark wood panels.

4-Bedroom Mid-Century Modern Single-Story Dogtrot House for a Wide Lot with In-Law Suite (Floor Plan)

Specifications:

Sq. Ft.: 2,340
Bedrooms: 4
Bathrooms: 3
Stories: 1
Garage: 3

This sprawling dogtrot house features a mid-century modern design with attractive wood siding, steel accents, a stone base, and a flat roof.

Two-Story Modern 4-Bedroom Northwest Home with Jack & Jill Bath and In-Law Suite Above the Double Garage (Floor Plan)

Specifications:

Sq. Ft.: 2,428
Bedrooms: 3-4
Bathrooms: 2.5-3.5
Stories: 2
Garage: 2

A beautiful blend of siding, clean lines, and huge windows bring a modern appeal to this Northwest home. It includes a sleek entry and a rear-loading garage with an in-law suite above. The in-law suite comes with a full kitchen and laundry closet.

6-Bedroom Rustic Two-Story Country Home with Loft and In-Law Suite Above the Angled Garage (Floor Plan)

Specifications:

Sq. Ft.: 2,761
Bedrooms: 5-6
Bathrooms: 3-4
Stories: 2
Garage: 2

Beautiful wood siding, exposed rafter tails, shed dormers, and stone-based columns framing the angled garage and covered porches bring a rustic charm to this two-story country home.

5-Bedroom Craftsman Style Two-Story Home for a Wide Lot with In-Law Suite Above the 3-Car Garage (Floor Plan)

Specifications:

Sq. Ft.: 3,655
Bedrooms: 3-5
Bathrooms: 3.5
Stories: 2
Garage: 3

This two-story home exudes a craftsman charm with its horizontal siding, cedar shakes, stone accents, and a welcoming front porch framed with columns. A multitude of gables with varying peaks adds character to the home.

Two-Story 5-Bedroom European Style Home for a Sloping Lot with In-Law Suite and Wet Bar (Floor Plan)

Specifications:

Sq. Ft.: 3,662
Bedrooms: 3-5
Bathrooms: 3.5
Stories: 2
Garage: 2

This two-story home radiates a European charm with its stately stone and stucco siding, a dramatic gable roofline, wood slat accents, and an archway framing the home’s entry.

Single-Story Country Style 5-Bedroom Farmhouse for a Wide Lot with In-Law Suite and Bonus Room (Floor Plan)

Specifications:

Sq. Ft.: 2,715
Bedrooms: 5
Bathrooms: 3.5
Stories: 1
Garage: 4

Board and batten siding, stone accents, shed dormers, and decorative gable brackets bring an impeccable curb appeal to this 5-bedroom farmhouse. It features an attached in-law suite and a bonus room above the garage perfect for future expansion.

Single-Story Modern 4-Bedroom Cliffside Home for a Sloping Lot with In-Law Suite (Floor Plan)

Specifications:

Sq. Ft.: 1,704
Bedrooms: 2-4
Bathrooms: 2
Stories: 1
Garage: 2

Slanted rooflines, concrete panels, and wood siding bring an immense curb appeal to this single-story modern cliffside home. It is designed for rear-sloping lots with multi-tiered decks that take advantage of rearward views.

Craftsman Style 4-Bedroom Single-Story Lake House for a Wide Lot with In-Law Suite and Multiple Garages (Floor Plan)

Specifications:

Sq. Ft.: 3,213
Bedrooms: 4
Bathrooms: 3.5
Stories: 1
Garage: 2

This 4-bedroom lake house showcases a craftsman charm with its board and batten siding, stone accents, gable brackets, and a deep welcoming front porch framed with tapered columns.

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

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.

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

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 home through a mudroom and walk-in pantry.

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

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.

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

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 family will surely enjoy.

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

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 farmhouse.

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

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.

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

This two-story Victorian home features an impeccable facade adorned with multiple gables, stone trims, a charming turret, and a wraparound front porch.

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

Concrete panels, slanted rooflines, and a multitude of large windows lend a modern influence to this two-story Mid-century home.

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

A mixture of concrete, stone, and wood siding brings an immense curb appeal to this single-story contemporary home.

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

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, and breakfast room.

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

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.

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

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.

4-Bedroom Modern Two-Story Northwest Home with In-Law Suite and Jack & Jill Bath (Floor Plan)

Specifications:

Sq. Ft.: 2,428
Bedrooms: 3-4
Bathrooms: 2.5-3.5
Stories: 2
Garage: 2

A combination of stone, concrete panels, and wood siding adorns this two-story modern Northwest home. It features a sleek entry porch and a rear entry garage with an in-law suite above.

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

Northwest home with a contemporary touch showcasing a gray siding, gable rooflines, striking stone accents, and an enticing entry framed with tapered columns.

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

A combination of stone and brown board and batten siding embellish this two-story home. Rustic wood trims and brackets heighten its craftsman appeal.

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

The single-story Florida home boasts a wide-open floor plan that ensures homeowners with optimum comfort and convenience plus an increased family bonding.

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

Gable rooflines, a charming dormer, stone and brick exterior, and an arched entry create a character in this Tuscan home.

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

The two-story modern home flaunts an impeccable facade showcasing its multiple gables, stone and siding combination, double columns, and plenty of glazed windows.

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

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.

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

Large shed dormers, window trellises, stone columns, and an arched entry grace this two-story red cottage.

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

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, and a mother-in-law casita located inside the swing-in garage.

Two-Story 4-Bedroom Broham Canyon Traditional Home with In-Law Suite (Floor Plan)

Specifications:

Sq. Ft.: 3,459
Bedrooms: 4
Bathrooms: 3.5
Stories: 2
Garages: 3

A mixture of stone and brick clad this two-story traditional home. Gable rooflines and arched transoms create a striking appeal.

4-Bedroom Two-Story Craftsman Style 2018 Idea Home with a Loft and In-Law Suite (Floor Plan)

Specifications:

Sq. Ft.: 2,697
Bedrooms: 4
Bathrooms: 3.5
Stories: 2
Garages: 2

This craftsman cottage is graced with modern innovations that are packed with lots of outdoor spaces and luxury amenities. The detached 2-car garage includes a VIP guest quarters overhead which would make a great in-law suite.

5-Bedroom Two-Story French Country-Inspired Home with Loft and In-Law Suite (Floor Plan)

Specifications:

Sq. Ft.: 3,601
Bedrooms: 4-5
Bathrooms: 3
Stories: 2
Garages: 2-3

Graceful gables, brick exterior, dormer windows, and an arched portico enhance the French country appeal of this two-story home.

7-Bedroom Two-Story Northwest Shingle Home with 3-Car Garage and Two Primary Suites (Floor Plan)

Specifications:

Sq. Ft.: 3,591
Bedrooms: 4-7
Bathrooms: 3.5-5.5
Stories: 2
Garages: 3

A perfect blend of stone and shakes graces this two-story Northwest shingle home. Multiple gables along with rain awnings and arched trellis above the garage doors add to the home’s appeal.

4-Bedroom Two-Story Mountain Modern Home with In-Law Suite and 4-Car Garage (Floor Plan)

Specifications:

Sq. Ft.: 3,359
Bedrooms: 4
Bathrooms: 3.5
Stories: 2
Garages: 4

Board and batten siding accentuated with rustic wood and subtle stones embellish this two-story mountain modern home.

5-Bedroom Two-Story Modern Country Farmhouse for a Wide Lot with Wet Bar and In-Law Suite (Floor Plan)

Specifications:

Sq. Ft.: 3,170
Bedrooms: 4-5
Bathrooms: 3.5+
Stories: 2
Garages: 2

This modern farmhouse offers a wide-open floor plan that includes expansive covered porches and flexible spaces to suit each family’s lifestyles.

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

Specifications:

Sq. Ft.: 2,678
Bedrooms: 4
Bathrooms: 4
Stories: 2
Garages: 3

A beautiful blend of stone, brick, and board and batten siding give this two-story traditional home an immense curb appeal. Decorative wooden trims gracing the gable rooflines add character to the home.

4-Bedroom Two-Story Modern Farmhouse with Optional Lower-Level Apartment or In-Law Suite (Floor Plan)

Specifications:

Sq. Ft.: 2,728
Bedrooms: 4
Bathrooms: 3
Stories: 2
Garages: 2

Metal roof accent, stone trims, and decorative brackets gracing the gables bring character to this modern farmhouse.

5-Bedroom Two-Story New American Farmhouse with Wraparound Front Porch and In-Law Suite Above Garage (Floor Plan)

Specifications:

Sq. Ft.: 3,880
Bedrooms: 5
Bathrooms: 4.5
Stories: 2
Garages: 3

This two-story New American farmhouse exhibits an eye-catching facade graced with a side-entry garage and a wraparound porch topped with twin gable dormers.

3-Bedroom Single-Story Traditional Style Home with In-Law Suite and Multiple Angled Garages (Floor Plan)

Specifications:

Sq. Ft.: 3,655
Bedrooms: 3
Bathrooms: 4
Stories: 1
Garages: 3

This highly textured traditional home offers a sprawling floor plan with a free-flowing layout for maximum comfort and convenient entertaining. All amenities and rooms are laid out on one floor for added convenience.

5-Bedroom Two-Story Modern Farmhouse with In-Law Suite and Bonus Room Above Garage (Floor Plan)

Specifications:

Sq. Ft.: 3,124
Bedrooms: 5
Bathrooms: 3.5-4.5
Stories: 2
Garages: 2

Standing seam metal roofs and a multitude of windows give this 5-bedroom farmhouse a modern flair. Board and batten siding accentuated with beautiful stones add to the home’s appeal.

4-Bedroom Single-Story Cottage Style Home for a Corner Lot with In-Law Suite (Floor Plan)

Specifications:

Sq. Ft.: 1,671
Bedrooms: 4
Bathrooms: 2
Stories: 1
Garage: 2

This 4-bedroom cottage home shows off a craftsman charm with its stone and siding, cedar shake accents, a gable dormer, and covered porches bordered with tapered columns.

About In-Law Suites

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.

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.

Design Your Own House Plan (Software) | See ALL Floor and House Plans | 25 Popular House Plans