Casita Floor Plans 101: Your Guide to Designing Comfort

casita floor plans

A recent Freddie Mac survey found that 71% of Americans are unfamiliar with accessory dwelling units (ADUs).

ADUs are smaller living spaces built on a homeowner’s existing property.

One example of an ADU is the casita.

Casitas are small attached or detached dwellings, also known as guest houses or mother-in-law suites.

They can be used to expand your existing space or house short-term renters.

No matter how you plan to use your casita, one thing is certain: these ADUs can add value to your home.

But first, you must understand the casita floor plans available. This guide will help you do just that.

What Is a Casita?

A casita is a small living space with a private entrance that is attached to or behind an existing single-family home.

“Casita” means cottage or small house in Spanish.

These spaces are becoming increasingly popular.

Most people consider them for extra income opportunities.

Others use the extra living space for older family members.

The benefits of building a casita on your property include increased home value and extra income opportunities.

You will also help to increase housing stock in your area, which can help with the nation’s current affordable housing crisis.

Factors in Choosing Casita Floor Plans

Before you start browsing floor plans, there are a few things to consider.

You must consider how you plan to use the casita, how much space you have to work with, and how much you have to spend.

How the Casita Will Be Used

Do you intend to use your casita for family? Or do you plan to rent the casita out?

If the latter, will you accept short-term renters, long-term tenants, or both?

The answer to these questions can help determine what type of floor plan you need.

For example, say you plan to rent the space out to long-term tenants.

In that case, you may want to consider a full kitchen rather than a kitchenette.

Similarly, family members may not care about sharing a wall with you and your family.

But if you want to rent the space, you may want to consider a detached casita for added privacy.

The Size and Shape of the Space

Most casitas are only a few hundred square feet, though some may be over 1,000 square feet.

Before you decide how large you want your casita to be, you must account for the size of the space you have available to build on.

And don’t forget to account for shape, too.

Most homes, casitas included, feature square or rectangular floor plans.

Ensure the plot of land where you want to build can accommodate such a structure.

How Much You Have to Spend

A final consideration is your budget.

Most people use their savings to finance the construction of a casita.

Of course, financing is also available, but some banks may not offer loan products for ADUs without a rental business plan.

When determining your budget, ensure you consider the cost of materials as well as construction labor.

And always remember that you get what you pay for when it comes to home builders and remodelers.

Additionally, leave room in your budget for permitting.

You can learn more about the permitting process for residential home additions and remodels in Phoenix in this City of Phoenix guide, as well as any other municipalities you choose.

Types of Floor Plans for Your Casita

As long as you get the right permit, consider how much space you have, and keep your costs under budget, you can design your casita however you please.

Still, ensure you include the following casita essentials:

  • At least one bedroom
  • At least one bathroom
  • A kitchen or kitchenette

These features are the foundation of any separate living space for relatives or renters.

Attached vs. Detached Casitas

Attached ADUs can be more cost-effective since they share a wall with your home. Plus, they work well if you don’t have extra space to build on.

For example, you could convert your unused garage into a casita.

Detached casitas offer ultimate privacy for guests.

You will also have more layout options available, especially for larger detached casitas. 

However, keep in mind that detached units cost more than attached ones.

Open vs. Closed Floor Plans

The majority of casitas feature an open floor plan to take advantage of the smaller space.

Open floor plans also offer better flow, let in more natural light, and provide a more modern aesthetic.

If more than one person intends to live in your casita, a closed floor may be the better option.

Closed floor plans provide more privacy and separate each room by the function it serves.

Studio vs. One-Bedroom Casitas

A smaller casita may benefit from a studio floor plan.

Studio living spaces feature one large open area meant for living, dining, and sleeping.

The bedroom may be partitioned, but it will not have its own door.

A one-bedroom casita is similar but features a completely sectioned-off bedroom area.

The living and dining spaces can also be partitioned, though designing the area with an open concept will provide the illusion of space.

Large vs. Small Floor Plans

A large floor plan offers the potential for higher rental income.

At the same time, your area may have certain setback, height, and density standards you must follow to receive a permit, which can limit your options.

A smaller unit may face similar permitting setbacks but be easier to accommodate.

You may not end up bringing in as much rental income.

Still, avoiding permitting headaches may be more than worth it for you.

Let Mariano & Co Build Your Casita in Mesa, AZ

The best casita floor plans depend on factors like your budget and how much space is available.

Then, you can choose from large and small, studio and one-bedroom, open and closed concept, or attached and detached options.

Are you searching for a custom casita builder in the greater Phoenix area?

Mariano & Co. is the #1 casita builder in Mesa, AZ.

Contact us to learn more about our expert luxury home remodelers and home addition building services.


If you’re looking for a casita builder in Gilbert, AZ, we’ve got you covered. At Mariano & Co., we specialize in luxury remodeling and renovations for high-end homes. We are committed to providing each client with a 5-Star home remodeling experience. Call (480) 287-4096 or request an estimate online today!