Casitas, In-Law Suites, and Backyard Homes: Which One Is Right for Your Property?

As Utah's housing needs evolve, more homeowners are exploring innovative living solutions like casitas, in-law suites, and backyard homes. These additions can enhance property value, support multigenerational living, and even generate rental income. But before starting construction, it's important to understand the differences between these options—and how local regulations may impact your plans.

Breaking Down the Options

Casitas are detached living units typically located in the backyard, and the name itself comes from the Spanish word for “little house.” These self-contained structures generally include a bedroom, bathroom, a small kitchen or kitchenette, and a private living space. Casitas are ideal for guest accommodations, adult children seeking independence, or long-term renters who need a separate residence with privacy.

In-law suites, often referred to as mother-in-law apartments, are integrated into the primary home. They can take the form of basement conversions, finished attic spaces, or additions built off to the side or rear of the house. This arrangement allows families to stay close while maintaining privacy and comfort for both households, making it especially useful for aging parents or young adults.

Backyard homes, more formally known as Accessory Dwelling Units (ADUs), include both attached and detached structures that serve as fully independent residences. These are gaining popularity throughout Utah as a response to increasing housing demand. Homeowners appreciate their versatility—whether used for family, rented out for supplemental income, or repurposed as home offices—and they often add significant value to the property over time.

Key Considerations for Utah Homeowners

1. Local Zoning and Regulations

Utah legalized internal ADUs statewide in 2021, but detached ADUs are regulated locally. According to a Deseret News article, Salt Lake City permits detached ADUs under specific conditions, while other areas in Utah may enforce stricter limitations.

• Salt Lake City allows detached ADUs with specific lot and size requirements
• Other cities or counties may impose stricter zoning rules

Before building, check for:

• Lot size and setback minimums
• Height and square footage limitations
• Parking or utility requirements

2. Intended Use

Your goals should drive the design and placement of the unit. Common uses include:

• Family housing for elderly parents or grown children
• Rental income from long-term tenants or short-term stays
• Home office or studio to separate work from home life

3. Design and Accessibility

Thoughtful design makes a difference, especially for comfort and function. Consider:

• Open floor plans for smaller footprints
• Ground-level access for aging occupants
• Visual and acoustic privacy from the main home

4. Financial Planning

These additions are an investment—but a strategic one. Account for:

• Design, permit, and engineering fees
• Site prep and construction costs
• Utility upgrades and connections
• Future property value increases

Choosing the Right Structure

There’s no one-size-fits-all. A casita or detached ADU offers privacy and rental potential, while an in-law suite allows for seamless integration and accessibility. Your final decision will depend on your property layout, local zoning, your goals—and the people who’ll be using the space.

Build With Confidence: Topp Remodeling & Construction

Topp Remodeling & Construction is one of Utah’s trusted names in home renovation and custom construction. Whether you're building a backyard casita, converting space into an in-law suite, or designing a modern ADU, Topp brings local expertise, precise craftsmanship, and a streamlined process from start to finish.