Adding an Accessory Dwelling Unit (ADU) to your property is one of the smartest investments you can make as a Utah homeowner. Whether you’re looking to create a private living space for family, generate steady rental income, or add long-term value to your home, Prestigious Home Builders delivers ADUs designed for your lifestyle and built to last.
An Accessory Dwelling Unit (ADU) — also known as a guest house, granny flat, backyard cottage, or casita — is a self-contained living space built on the same property as your main home. In Utah, ADUs can be detached, attached to the main home, or created by converting existing spaces like a garage or basement. Every ADU includes essential features such as a kitchen, bathroom, sleeping area, and a private entrance, making it a fully functional residence.
In Washington County and Iron County, ADUs are becoming increasingly popular for homeowners who want to:
Local regulations can vary depending on the city, with specific guidelines on ADU size, design, parking requirements, and permitting. Our team at Prestigious Home Builders is experienced in navigating these rules so your ADU not only complies with local laws but also maximizes your property’s potential.
At Prestigious Home Builders, we provide full-service ADU solutions for homeowners across Washington County and Iron County. From the first design meeting to the final inspection, our team handles every step of the process — including design, permitting, construction, and finishing touches. Whether you’re looking for affordable ADU builders who can maximize your budget, or luxury ADU builders in Utah who deliver high-end, custom-crafted spaces, we tailor each project to your needs and property.
A standalone structure separate from your main home, offering complete privacy and flexibility. Ideal for rental units, guest houses, or multi-generational living. Detached ADUs provide the most design freedom and can be customized with luxury finishes or built to fit a more cost-conscious budget.
An attached ADU shares a wall or structure with your main residence, making it more cost-effective while still providing an independent living space. This option is perfect for homeowners seeking extra space for family or a private home office without the expense of a completely new structure.
Transform unused garage space into a comfortable, fully functional living area. Garage conversion ADUs are one of the most affordable ADU solutions and can be completed faster than ground-up construction — ideal for rentals, guest quarters, or studios.
Turn your basement into a fully equipped apartment with a private entrance, kitchen, bathroom, and living space. This option makes excellent use of existing square footage and is often a budget-friendly ADU build with quick turnaround times.
When space is limited, we build upward. Two-story ADUs maximize small lots by adding vertical living space and can accommodate multiple bedrooms, home offices, or even a rental unit on one floor and guest quarters on another. For those seeking luxury ADU builders in Utah, a two-story build offers impressive curb appeal and functional flexibility.
Building an Accessory Dwelling Unit (ADU) isn’t just about adding extra space — it’s about creating long-term value, income potential, and lifestyle flexibility. At Prestigious Home Builders, we’ve helped countless homeowners in Washington County and Iron County turn unused property space into high-performing, functional living areas that pay for themselves over time.
Whether your goal is rental income, housing for family members, or simply increasing your property’s market value, an ADU is one of the smartest home improvements you can make in Utah.
We work with all budgets — from affordable ADU builds that maximize value, to luxury ADU projects featuring high-end finishes, custom cabinetry, and designer touches. Whatever your vision, our team ensures your ADU is functional, beautiful, and built to last.
The cost of building an Accessory Dwelling Unit (ADU) in Utah can vary widely depending on the type, size, materials, and finishes you choose. At Prestigious Home Builders, we provide clear, transparent estimates so you know exactly what to expect before construction begins — no hidden fees, no surprises.
While every project is unique, here’s a general breakdown of what you can expect:
Note: These ranges include design, permitting, construction, and basic finishes. High-end features, custom layouts, or challenging site conditions can increase costs.
An ADU is one of the most financially rewarding property investments you can make. Benefits include:
In most cases, an ADU can pay for itself in 5–10 years through rental income and appreciation — while continuing to generate returns for decades.
At Prestigious Home Builders, we make building an Accessory Dwelling Unit (ADU) in Utah simple, transparent, and stress-free. Whether you’re in Washington County or Iron County, we handle every step — from planning to move-in — while ensuring your project meets all local zoning laws and building codes.
We begin with a free consultation to discuss your goals, budget, and timeline. Our team then evaluates your property to determine the best ADU type (detached, attached, garage conversion, basement, or two-story) and confirms feasibility based on city and county requirements.
Our design experts create architectural plans tailored to your style, space, and intended use — whether for rental income, multi-generational living, or a luxury ADU retreat. We optimize layouts for both functionality and aesthetics.
We manage all permitting and approvals with your local jurisdiction. Our experience with Utah’s ADU regulations ensures a smoother, faster approval process while keeping your project 100% compliant.
Our skilled builders bring your ADU design to life using quality materials and proven craftsmanship. From the foundation to final finishes, every detail is handled with precision and care.
Before we hand over the keys, we conduct a detailed walkthrough to ensure every aspect of your ADU meets our high standards — and yours. You’ll move into a fully finished, ready-to-use space built exactly to your vision.
An Accessory Dwelling Unit (ADU) is a secondary living space on your property that has its own kitchen, bathroom, and entrance. Unlike a simple guest house, ADUs are fully self-contained and meet residential building codes.
Costs can range from $60,000 for a garage conversion to $350,000+ for a detached or luxury ADU. Your price depends on size, materials, finishes, and site conditions.
Yes. Both counties require proper permitting to ensure your ADU meets zoning and safety standards. We handle all permit applications and approvals for you.
Yes. Many Utah homeowners rent out ADUs for $1,200–$2,500 per month, depending on location and features. Local rental regulations still apply.
Most ADU projects take 4–8 months from design to completion, depending on size, complexity, and permit processing times.
We offer detached ADUs, attached ADUs, garage conversions, basement conversions, and two-story ADUs — all fully customized to your needs and budget.
Yes. Size limits vary by city and county. In many cases, ADUs cannot exceed 50% of the main home’s square footage or a set maximum (e.g., 1,000 sq. ft.).
Absolutely. We specialize in both affordable and luxury ADU builds, offering premium finishes, smart home features, and designer touches.
Most likely yes, but the increase is often offset by the added property value and potential rental income.
Prefab (pre-fabricated) ADUs are often 10–20% cheaper than fully custom builds because they are manufactured off-site and assembled on your property. However, prefab designs are less customizable, and you’ll still need to budget for site prep, utility connections, and permits.
An addition to your existing home is usually cheaper than building a separate ADU because it shares walls, utilities, and a foundation. However, an ADU adds independent living space, privacy, and rental potential, which can make it a better long-term investment.
An addition to your existing home is usually cheaper than building a separate ADU because it shares walls, utilities, and a foundation. However, an ADU adds independent living space, privacy, and rental potential, which can make it a better long-term investment.
