Examples of 12×40 house designs, and small two-story houses inside, with floor plans and elevations.
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12×40 House Designs
12×40 Two Floors Tiny House Design

This example of 4×12 meter two-story small house design features a front elevation that is more based on the geometric design of the parallelepiped. Glazed openings are made in the form of squares or rectangles, and the balcony, likewise, is defined in the form of a horizontal rectangle.
The exterior finish marked by a grid could be in marked concrete, or even with alucobond panels, in gray and terracotta.
12×40 2 Floor Tiny House Interior Design
Entering this 12×40 tiny house design, we first find the dining room, located in a double-height space that “absorbs” the remains of the spaces around it.


The living room of the house is independent, with respect to the main access. However, a large glass window keeps it connected with the outside.

The two-flight stairs that lead to each of the 2 bedrooms are the other set of elements that characterize the central space of the house.

12×40 2 Bedrooms 2 Story Floor Plans with Dimensions
On the ground floor the house is distributed in the following spaces:

12×40 ft House | ||
Upper Floor | Net Area | Net Area |
Access | 29.1 sq ft | 2.7 sqm |
Living room | 84.0 sq ft | 7.8 sqm |
Kitchen | 101.3 sq ft | 9.4 sqm |
Dinning room | 147.7 sq ft | 13.7 sqm |
Full Bathroom | 49.6 sq ft | 4.6 sqm |
Stairs | 55.0 sq ft | 5.1 sqm |
Total Upper Floor | 466.8 sq ft | 43.3 sqm |
Ground Floor | Net Area | Net Area |
Bedroom 1 | 118.6 sq ft | 11.0 sqm |
Balcony | 6.5 sq ft | 0.6 sqm |
Bedroom 2 | 156.3 sq ft | 14.5 sqm |
Total Ground Floor | 281.4 sq ft | 26.1 sqm |
Total | 748.1 sq ft | 69.4 sqm |

On the upper floor the house is composed as follows:
Being a tiny house, the space under the stairs is ready to be used, locating washing machines, bookcases and other necessary objects of the house.

Each bedroom has a double bed, and openings that give them the possibility of lighting and ventilating naturally.
12×40 1 Bedroom Tiny House Plans, Loft
Another example of a 12 FEET WIDE house plan with two floors inside. This small house of 4×12 meters is a loft-style model and has only one bedroom and two bathrooms, among other characteristics.
The house has a useful area of 600 sq ft adding the 2 levels.

The design of the front elevation is very simple, with a minimalist style. Note that it is made up of a simple plane, with the window and door openings, in both cases made of glass.
The exterior finishing material is based on smoothed cement, which results in a lower construction cost and greater durability.
Designs of Small 12×40 ft Two-Story Houses Inside

Towards the interior we find the living room, where 4 seats can be located: a double sofa and 2 singles.


Being a small loft, the living room, dining room and kitchen are integrated, which brings about greater optimization of space and savings in square meters of construction.
The wood veneer of the staircase (36 inches wide) and the cornice of the mezzanine create an interesting contrast with the light color of the ceramic floor and walls.

The “U” shaped kitchen has a small bar with 3 seats, giving the house more functionality.
12×40 House Designs Two-Story Plans in 3D
On the upper floor, in addition to the bedroom, there is a complete bathroom and a small room for individual study.


12×40 ft House | ||
Upper Floor | Net Area | Net Area |
Access | 14.0 sq ft | 1.3 sqm |
Living room | 176.8 sq ft | 16.4 sqm |
Dinning -Kitchen | 134.8 sq ft | 12.5 sqm |
Full Bathroom | 27.0 sq ft | 2.5 sqm |
Stairs | 29.1 sq ft | 2.7 sqm |
Closet | 5.4 sq ft | 0.5 sqm |
Total Upper Floor | 388.1 sq ft | 36.0 sqm |
Ground Floor | Net Area | Net Area |
Bedroom 1 | 148.8 sq ft | 13.8 sqm |
Bathroom | 34.5 sq ft | 3.2 sqm |
Study room | 18.3 sq ft | 1.7 sqm |
Total Ground Floor | 202.7 sq ft | 18.8 sqm |
Total | 590.7 sq ft | 54.8 sqm |

If you are looking for house ideas, you might find very useful examples of HOUSE PLAN DESIGNS.