Accessory Dwelling Units (ADUs) are becoming more and more popular nowadays, especially as local laws are changing allowing homeowners more options. But what is the legal definition of accessory dwelling units?
Accessory Dwelling Unit Meaning
As people search for accessory dwelling units to buy or build, it is important to define the term. According to the American Planning Association, an Accessory Dwelling Unit (ADU) is a small residential dwelling located on the same lot as the primary residence (single-family home).
What is called an ADU? In general, ADU is also known as a granny flat, guest house, additional dwelling unit, rental apartment, mother-in-law suite, granny cottage, secondary dwelling, additional dwelling unit, home office, backyard cabin, or carriage house.
As you plan to build or order a prefab ADU for your mother-in-law or aging parents, browse our collection of popular options and suitable floor plans for accessory dwelling units.
1. Whimsical Tiny Cottage Plan Perfect for ADU
Get Whimsical Cottage Plan by AD HERE
Important to realize, that accessory dwelling units come in different styles! You will find the perfect addition to your property in the iconic cottage-style Accessory Dwelling Unit (ADU). Inspired by fairy tales, this charming space is ideal for hosting your in-laws or elderly parents. In fact, with grandparents nearby, you won’t need a babysitter – they can snuggle up by the cozy fireplace and read stories to the kids.
This whimsical cottage can work as a stand-alone ADU on any property (check your zoning laws). Furthermore, it can be a rental apartment, a guest house, or a weekend escape.
As a result, create a comfortable living space with this compact yet functional design for a 300 sq. ft. tiny cottage. The heart of the home boasts a cozy living area complete with a corner fireplace, perfect for winding down after a long day.
To the left, you will find a well-equipped kitchenette with ample storage space. Plus, enjoy the convenience of a bathroom, storage closet, and even a charming porch.
2. Charming 1 Bed Cottage
Get a 544 sqft Charming Cottage Plan HERE
If you need some more space to make your mother-in-law’s cottage even more comfortable, take a look at a similar floor plan boasting 544 square feet on a single level. At the same time, with stone and stucco architectural details, the cottage is reminiscent of charming European rustic homes.
Additionally, in this larger plan, you’ll have a separate private bedroom and a spacious bath. Surprisingly, there is even a linen closet with a stacked washer/dryer. Besides, with lots of nooks and crannies in this cottage, there is even space for a coat closet and pantry.
3. A Modern Single Level Accessory Dwelling Unit
Get an 832 SQFT Modern ADU Plan HERE
In contrast to an idyllic cottage, check out the ultra-modern clean lines of this accessory dwelling unit. Its straightforward design boasts 832 square feet of living space with an optional sleeping loft.
Not only does it have 14-foot high ceilings in the living, kitchen, and dining area, but also has large glass windows to let in plenty of natural light. These important features make small spaces look larger. A convenient sliding door leads to a wrap-around deck to connect indoor and outdoor spaces.
With a separate bathroom, laundry, and storage located in a foyer, there is everything you’d need to feel comfortable in this 800 sq. ft. single-level home. In summary, it makes a perfect home plan for retirees without sacrificing any comforts of life.
4. 2 Bedroom 900 sqft Single-Level Cottage
Get a 900 sqft Cottage Plan HERE
This single-level cottage presents a perfect solution if you need a rental ADU or a granny cottage on your property. Your parents can enjoy their golden years and age in place in this perfect floor plan for retirees.
An open-concept living area has 12′ ceilings, a cozy fireplace, and an island with seating. The person who loves gardening will appreciate a separate entrance through the mud room and a cozy porch to enjoy fresh air in a rocking chair.
Whether you need a rental ADU on your property for extra income or a comfortable place for aging parents, this floor plan with 2 bedrooms provides plenty of flexibility and options.
5. 2 Bedroom Accessory Dwelling Unit (ADU) plan
Get a Modern Cottage 800 sqft plan HERE
Looking for modern plans for accessory dwelling units on your property? In fact, this mid-century modern floor plan with clean lines and a shed-style roof can be an answer.
While the 800 sq. ft. plan is equally divided into 2 parts, it creates an open living/dining area and two bedrooms each with access to a separate full bath. Additionally, there is plenty of space to enjoy outdoors and entertain with a covered and open patio.
6. 1 Bedroom Accessory Dwelling Unit
GET 1 BEDROOM MODERN ADU PLAN HERE
If you are looking for an ADU floor plan to accommodate a narrow lot, take a look at the spacious design of this dwelling. The versatile features of the plan offer endless possibilities for hosting guests, an additional income, or multi-generational living arrangements.
This modern solution gives a comfortable bedroom (with a closet, laundry, and bath) and an open-concept main area. On the negative side, the patio looks too small, according to the plan, but you can always request some modifications.
7. 952 sq. ft. Modern ADU with Garage (or Shop)
GET A RUSTIC COUNTRY 952 SQFT FLOOR PLAN HERE
Check out this rustic country house plan as a possible solution for a spacious ADU or house for retirees. With a little under 1000 sq.ft., 2 bedrooms, 2 porches, and even a 2-car garage, there is plenty of space for living and hobbies.
If you enjoy the popular barnhouse-style for your country home, this plan is for you. As an illustration, a dark color scheme, wooden beams, and a metal roof complete the look for this simple yet appealing architectural style.
8. Small Cottage ADU (800 sq. ft.)
GET 884 SQFT COTTAGE PLAN HERE
In general, you would want the style of an accessory dwelling unit to match the architectural style of your main house. For this reason, it is important to feature different sizes and styles of plans so you can pick the ADU that fits your needs.
With this plan, you can build a perfect mother-in-law cottage that any retiree would appreciate. With a vaulted living/kitchen area and 2 spacious 10′ x 11′ bedrooms, anyone can enjoy life in style. Furthermore, relax on your covered porch, even when it is raining.
9. Granny Flat (Accessory Dwelling Unit)
This simple yet spacious floor plan gives you plenty of options for a comfortable ADU, backyard rental, downsizing, or a small vacation home.
Notably, with an open-concept living area and two bedrooms with separate bathrooms, there is enough room for a couple of retirees or a small family. Also, 2 sets of French doors connect the living area with an open patio and let in plenty of natural light.
10. 675 sq. ft. Modern Accessory Dwelling Unit
GET 675 SQ.FT. MODERN ADU PLAN HERE
Step inside this modern accessory dwelling unit to appreciate how well-designed this compact space is. Firstly, you are greeted by an entry area with a coat closet and a comfortable bench.
Next, step into an open living room with a sloped high ceiling with lots of natural light. Lastly, a private bedroom is designed for relaxation with a separate laundry area and a walk-in closet to keep your stuff well-organized.
