If you are working on a plan for 1000 sq ft house, you have a lot of decisions to make. Floor plans for 1000 sq ft houses come in many layouts. Most prefabs will be rectangular or square, I shaped or L shaped and at least 12-14 feet wide. You can often maximize your backyard potential with a custom shape.
What ADU floor plan will make the most of your backyard?
Hint: the ones that fit your backyard like a lost piece of a puzzle.
A family is moving an aging parent closer to home, and try to accommodate a guest suite for a wheelchair bound relative. Lot size allows to plan for 1000 sq ft house.
The location of this ADU was restricted from all 4 sides sides:
1. Property line 2. Main house 3. Creek 4. Public Utility Easement
In addition to all that, it was in WUI zone and had to be built fire resistant. In this project, we had only one lucky break: there were two hydrants on both sides of the property within the required 400 ft distance.
A bigger bathroom accommodates the necessary area for a wheelchair turnaround, has both a shower and a tub, plus houses the laundry.
The living room has vaulted ceilings (though the general contractor in charge may blacklist us for this design feature). The fireplace is surrounded by two windows, with the nearby exit to the deck facing the creek.
The initial design had walk in closets in both bedrooms. However the homeowners decided to have a bigger one in the primary bedroom and have the smaller size guest room.
If you’re hoping to house a larger family, this layout will cleverly serve the purpose. It’s like a regular home layout that fits into a much smaller space! Here, contemporary charm meets the timeless beauty of light oakwood. So, this is a space that’s big on style and functionality.
What does this 1000 sq ft plan look like?
Living Room
The unique part about this floor plan is that it dedicates a separate room for the living area. This contains ample seating space and an entertainment complex.
Kitchen and Dining
The kitchen and dining areas are blended together in an open space in this kitchen. There’s also a small space you could repurpose as a pantry!
Bedrooms
The two bedrooms in this floor plan are nice and spacious, with room for beds, bedside tables, and a dresser. Their windows—and window treatments—are also bigger than those you’d see in regular mother-in-law suites. The two rooms are joined with individual closet spaces for both rooms.
Bathroom
The bathroom for this suite is a tranquil heaven—especially with its powder blue hues. It has a bathtub and shower cubicle (a rare happening in compact spaces) and a vanity with ample countertop space. The toilet is segregated with a narrow wall. At the same time, one corner provides room to set up a laundry.
We have a 2 bedroom 2 bathroom 1000 sq ft plan pre-approved for San Jose. What does it mean? Super fast permitting. Why? It has already been checked by the local planning and building department.
Can you use this plan in a different City or County? Yes, we will need to localize engineering for your jurisdiction’s requirements. But it is still faster than starting from scratch.
What makes it even faster to build? It’s engineered for prefabricated panelized construction.
Can it be a small starter home on a vacant lot? SURE.


The best ADU Floor Plan addresses family needs and fits the backyard like a glove. Your new ADU should look like it has always been there, not as a foreign object. It should also maximize the space – take as much of your backyard as you are willing to dedicate to the new living area.
We have 50+ floor plans that can easily become a plan for a 1000 sq ft house. We are also happy share more case studies.

This two bedroom one bathroom ADU design makes efficient use of space with more emphasis on common living area, spacious primary bedroom and a smaller secondary bedroom (that could also be used as a guest room or home office).

This two bedroom one bathroom ADU design has a comfortable living area, two small bedrooms, laundry space and the bathroom with the shower/tub combo. Plus, it has a garage.

This two bedroom two bathroom ADU has a primary en suite bathroom and an additional bathroom with access from the living area.

This detached two bedroom two bathroom ADU has a primary en suite bathroom and an additional bathroom with access from the living area and a spacious laundry area. L-shaped kitchen, living and dining are an open space design.

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!
From traditional slab and pier options to hybrid foundations that use helical screw piles – the final choice needs to be evaluated on the basis of backyard access, feasibility, budget and house designs.
California is going all electric. This means your water heater will be electric. So will your HVAC heat pump and cooktop. You will be required to put some solar panels on the roof as well. All this needs a 200A + electric panel.
We love indoor-outdoor seamless flow and having lots of natural light. It often comes at the expense of energy efficiency. You can compensate for it with better quality windows with a lower U factor. Include in your plan for 1000 sq ft house.