750 sq ft ADUs are versatile spaces that can serve a multitude of purposes, from accessory dwelling units (ADUs) to tiny family homes. They offer the potential for additional income, can help offset housing costs, and can even serve as guest houses. This is why the property owners get inspired with their adaptability.
Let us discover the hidden potential of your backyard space. Property owners should consider building additional square footage to plan for rental income in retirement and benefit their community. A 750 sq ft ADU cannot be a junior ADU but a detached or attached ADU (assuming your main house is more than 1500 sq ft).

We have spent time studying tiny homes for better and more efficient floor plans. It’s bigger than it sounds – when the floor layout is thoughtful. 750 sf house plan for this accessory dwelling unit can be a combo of guest house and home office, can be built wheelchair accessible, house a loft for storage space, can be used as a guest house and home office, place for older parents or adult kids, or as a rare rental that can house a whole family.
The kitchen has full size appliances. There is space for laundry. Every bedroom has a closet. There is dedicated space for dining and living areas.
Feel free to compare it to our 500 sq ft , 1000 sq ft and 1200 sq ft house plans.
How big is 750 square feet? Open space kitchen and living room, two bedrooms with closets, a bathroom and a laundry area. This is how big. Add a loft to keep suitcases in, and you have a very comfortable home for a small family!
Minimal size of an accessory dwelling unit by law is 150 sf ft. We are able to fit a bathroom and small kitchenette into a 200 sf ft studio.
Reasonable size for a small one bedroom dwelling unit. The bathroom has enough space for a tub. The size of the kitchen can be adjusted according to your needs.
This one bedroom one bathroom can be executed in an L shaped or in a more traditional I shape layout depending on the space in your backyard.
This two bedroom two bathroom ADU has a primary en suite bathroom and an additional bathroom with access from the living area.
This two bedroom two bathroom ADU has a primary en suite bathroom and an additional bathroom with access from the living area. The kitchen has an option to be a separate room.
This two bedroom two bathroom ADU has a primary en suite bathroom and an additional bathroom with access from the living area. Both bedroom have walk in closets, and there is an additional flex room that could be used as an office. Can easily be used as a main home for a small lot!
A 750 sq ft ADU is the size of an average classroom. A typical classroom is about 700 to 900 square feet. 750 square feet is similar to the size of your classroom, where you learned and played with friends as a middle school student.
Many small apartments or tiny homes are around 750 square feet. For instance, a two-bedroom apartment with a living room, kitchen, and bathroom can comfortably fit within this space.
The foundation of a 750 sq ft ADU can be about 30 feet long and 25 feet wide—a large rectangle on which you can imagine placing rooms and furniture.
A standard NBA basketball court is approximately 4,700 square feet. 750 square feet would be about 1/6th (or 16%) of a full basketball court.
A standard singles tennis court is around 2,808 square feet. 750 square feet would be about 1/4 (or 27%) of a tennis court.
An American football field (including end zones) is about 57,600 square feet, so 750 square feet would be about 1.3%.
We are used to bigger sizes of a main house, so homeowners often worry that more than 750 sq ft may be needed. If you hear this from your design professionals, move on and look for ADU designers and builders familiar with ADU construction. They have most likely worked with 750 sq ft ADU plans and will be able to recommend an ADU design and consult on the cost of ADUs.

We know how to make it happen. Spend more time with us in the planning stage, so we could value engineer your project before it even goes to structural engineer. 750 square feet may sound small, but it is still a construction project. Spend more time with us in pre-construction phase looking into the details of design of every one of your 750 square feet. We will tell you what drives costs, show you the budget item by item right after the preliminary site visit.
We have options for foundation, framing, windows – all big cost items that are out of your control after you send your design to the structural engineer. Remember, you can not save money after you have started building. Great value-engineering and best savings happen at pre-construction phase.
There is a number of pre-designed floor plans in our library – we have I shaped ADU, L shaped ADU and more.
Most ADUs under 750 square feet boast two bedrooms and one bathroom, but we can adapt floor plans to your requirements if you need a bigger bedroom or two bathrooms.
Every thousand dollars matters when you look at an ADU as an investment into your property. This is why we try to save you money with pre-designed plans. We have more than 300 ADU floor plans to select from.



The price tag for a new accessory dwelling unit often seems high. ADUs under 800 sf are allowed in the state of California by right – with a few exceptions like high fire hazard zones. Plus, ADUs under 750 sf are not subject to impact fees saving you thousands of dollars.
If you are working mostly from home you need additional space for work. The extra bedroom helps you separate your work and family lives.
The pandemic has brought in a sense of insecurity in the minds of all. This is more so in the minds of the aged people. 750 sq ft house plan makes it easy to accommodate your aged parents or in-laws and to have them near you.
We know homeowners who built a new house in the backyard for themselves, planning to rent out the main house and travel the world.
The new house will also have the latest high-performance building with all electric systems and solar panels. This means lower utility bills and easier maintenance.
Our 750 sq ft house plan is all on one level – everything is within reach with no obstacles.
A 750 sq ft ADU can accommodate a 2-bedroom, 2-bath layout. However, it will require some design finesse, a healthy dose of flexibility from the property owner, and an emphasis on the efficient use of space.
Think about it this way:
Prioritize open floor plan. An open layout for the living, dining, and kitchen areas helps save space and creates a more spacious feel.
Opting for smaller kitchen appliances, bathroom fixtures, and clever storage solutions (e.g., built-in shelves or under-bed storage) can make the space more functional. Designing the kitchen and bathroom back-to-back or side-by-side can save on plumbing and wall space. Items like fold-out tables or Murphy beds can help use the available space better.
Many tiny houses and small apartments fit two bedrooms and two bathrooms into 700-800 square feet. The key is minimizing hallway space and maximizing the usability of every square foot.
While 750 square feet is tight for a 2B/2 Bath ADU, it’s definitely doable with efficient planning and design. Our collection has more than 500 plans for backyard cottages —all with 3D virtual tours available on demand. This is a perfect way to see for yourself what is possible in 750 square feet.

Choose from one of the 500+ pre-designed ADU plans

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Review preliminary estimate of your selected ADU
Construction costs differ across the country, which is why we offer a range when evaluating the potential costs of your ADU project. Some site conditions, such as the slope of a lot, the type of power lines, and yard access, will add extra costs. Your family’s specific needs may offer an additional layer of complexity.
Surprisingly, architectural design is only one factor contributing to your ADU cost. Even if you are using a preapproved ADU plan, your ADU builder will need to follow local codes and local ordinances and adapt them to your property. While there may be no minimum lot size requirements, your city may have a lot coverage requirement that will impact the possible size of your ADU. An accessory dwelling unit bigger than 500 sq ft will require the installation of solar panels.
While 750 square feet may seem small, it can still be a worthwhile project for a general contractor and ADU builder.
A 750 sq ft space is large enough to include multiple rooms and typically accommodates:
This size allows for a whole construction project, including foundation work, framing, electrical, plumbing, and finishing. Bathrooms and kitchens are the most expensive areas to build. If you are thinking of a two-story ADU, consider adding a second bathroom so that each floor has at least a half bath and residents do not need to go up and down the stairs at night to use one.
750 sq ft is slightly more than typical above-garage ADUs. The average cost for an above-garage project also tends to be higher, as it typically requires reinforcement of the foundation and some structural changes to garage walls.
That said, these smaller projects can often be completed more quickly.
With careful planning, these projects can be value-engineered to maximize efficiency and minimize costs. Spending more time in pre-construction can lead to better value engineering and cost savings. Planning matters.
This size has some regulatory benefits. In some areas, like California, ADUs under 750 sq ft are not subject to impact fees (you won’t pay extra for roads, parks, and such), potentially saving thousands of dollars.
Add to that the market demand for smaller spaces. There’s growing interest in smaller, more efficient living spaces, especially in urban areas. This trend can potentially increase the resale value of your real estate, making it a sound investment for property owners.
While 750 sq ft projects may not be as lucrative for builders as larger developments, they can still be valuable for general contractors expanding the contractor’s project portfolio. These projects offer opportunities to showcase efficient design and construction skills, potentially leading to more work in the growing market for smaller, well-designed living spaces.
Space optimization matters. Contractors and designers need to be creative in maximizing the use of limited space, often including patio and outdoor kitchen options.
Here is a list of what to include, or at least consider, in your architectural drawings for a 750 sq ft ADU:
You can create a comfortable and well-designed living space within your 750-square-foot home. Remember that thoughtful planning and creative solutions are key to maximizing every square foot.