ADU Construction

ADU Construction

Accessory dwelling unit construction for rental income, multigenerational living, guest space, and flexible property use.

20+ Years Exp.
100+ Engineered & built homes
3 States
Licensed & Insured

One Team, Start to Finish

Design, engineering, and construction under a single contract. No finger-pointing, no miscommunication.

Faster Timelines

Overlapping design and build phases means your project gets done sooner — without sacrificing quality.

No Surprise Change Orders

Because the people designing your plans are the ones building them, the budget stays honest from day one.

About This Service

ADU Construction

ADU construction in Utah for detached and attached accessory dwelling units. Platypus coordinates design, engineering, site work, and construction.

  • Detached
  • Attached Accessory Dwelling Units. Platypus Coordinates Design
  • Engineering
  • Site Work
  • Construction
  • Rental Income
Discuss Your Project
ADU Construction
How It Works

Three steps from idea to reality.

01

Consultation

Tell us about your project — timeline, budget, and vision. We'll assess feasibility and outline a clear path forward.

02

Design & Engineering

Our in-house architects and engineers develop plans optimized for constructability, code compliance, and your budget.

03

Build

The same team that designed your plans builds your project — ensuring nothing gets lost in translation.

ADU construction can add flexibility, value, and useful living space to your property when it is planned correctly. Platypus Design and Construction helps Utah homeowners build accessory dwelling units with design, engineering, site planning, and construction working together.

An ADU is a small project only in square footage. It still requires careful decisions about utilities, access, setbacks, structure, privacy, parking, code requirements, and how the new unit fits the property. Our integrated team helps make those decisions clearer from the start.

Accessory Dwelling Units Built for Real Use

ADUs can support rental income, multigenerational living, guest accommodations, home offices, or long-term flexibility. We help homeowners define the purpose of the unit so the layout, finishes, site position, and construction scope all support that goal.

Because ADUs touch so many parts of a property, coordination matters. We look at the existing home, available space, utility routes, foundation needs, drainage, access, and construction logistics before the project is underway.

What Our ADU Construction Services Include

Our ADU construction services support attached, detached, and converted living spaces depending on the property and local requirements.

  • Detached ADU construction for backyard cottages, guest houses, and rental units
  • Attached ADU construction for additions or connected living spaces
  • Garage and accessory structure conversions where the existing structure is suitable for conversion
  • Site and utility coordination for access, drainage, sewer, power, water, and grading considerations
  • Foundation and framing coordination so the unit is built on a solid structural plan
  • Design-build execution that keeps the ADU practical, code-conscious, and buildable

Our ADU Construction Process

A successful ADU starts with feasibility. We help clarify what the property can support, what constraints matter, and how the build should be sequenced.

  • Listen and define the scope: We start by understanding your goals, property, budget direction, timeline, and the constraints that could affect the work.
  • Plan with design and engineering in mind: Our team looks at structure, site conditions, code considerations, sequencing, and buildability before expensive decisions are made.
  • Coordinate the construction details: Because design, engineering, and construction stay under one roof, the plan is easier to execute and adjust as real conditions come into focus.
  • Build with clear communication: You get practical updates, direct answers, and a team focused on doing the work correctly instead of passing responsibility between separate contractors.

Why ADUs Need Careful Coordination

ADUs sit at the intersection of residential design, site work, utilities, code, and construction. If one piece is missed, the project can become more expensive or harder to approve and build.

Our team keeps those pieces connected. That gives homeowners a clearer path from idea to construction and helps the finished ADU feel like a smart extension of the property rather than an afterthought.

Common ADU Construction Projects We Help With

ADU projects are often driven by a very specific need. We help homeowners match the construction scope to the purpose of the unit and the constraints of the lot.

  • Detached backyard ADUs for rental potential, guests, or independent family living
  • Attached ADUs that expand the main home while creating separate usable space
  • Guest houses designed for visitors, family members, or flexible long-term use
  • Rental units planned with privacy, access, utilities, and durability in mind
  • Multigenerational living spaces that support independence while staying close to family
  • Small-footprint dwellings where efficient layout and construction coordination matter

Built With the Next Step in Mind

A residential construction project rarely succeeds because of one isolated trade. Utilities, access, drainage, foundation work, framing, and finish choices all need to support the ADU’s intended use. We coordinate those details so the finished unit is practical and buildable.

That is why Platypus plans each scope with the surrounding work in view. We want the project to make sense on paper, in the field, and years after the work is complete.

ADU Construction for Utah Homeowners

Utah cities can vary in how they handle ADU requirements, property constraints, parking, and utility considerations. We help homeowners approach the project with those local realities in mind.

If you are planning an ADU in Utah, Platypus Design and Construction can help you shape the scope, coordinate the technical details, and move forward with a construction team that understands the full picture.

"From our very first meeting, the Platypus team felt different. They didn't just design our home — they engineered every detail and built it themselves. No miscommunication, no finger-pointing. Just one team that truly cared about our vision."
Sarah & Mike R. Custom Home — Eagle Mountain, UT

Let's build something great together.

Whether you have full plans or just an idea, our team will guide you from concept to completion.

What Our Clients Say

Real Projects. Real People.
Real Results.

We let our work — and our clients — speak for us. Here's what homeowners and business owners have to say about working with Platypus Design & Construction.

"I am more than satisfied with the excellent work Platypus Design and Construction recently did for us. After a windstorm blew down a portion of our vinyl fence, he not only repaired the fence but saw what needed to be done to secure it so it would withstand future storms. He performed the work quickly, efficiently, and skillfully. The result was excellent and the cost was reasonable. We also appreciate the clarity and friendliness of all his communications and interactions with us. Overall, he did a superb job, even exceeding our expectations."
Bruce Y. Fence Repair
"McKay and his team have done multiple TI buildout projects for me and my Scenthound locations. They have been great to work with through everything to help me get a mix of great pricing, service, and overall product delivery. They are honest with their work and will ensure they take care of you as their client. Further, being able to use them for both design drawing, engineering, and the project buildout and management has saved me tens of thousands of dollars and weeks of time during my buildouts to have it all done with them in house. Platypus will continue to be my go-to for all my future commercial construction needs."
Spencer S. Commercial Build-Out
"We had an outstanding experience working with McKay Harper and Platypus Construction on a garage addition and a custom pergola over our patio. From the beginning, McKay demonstrated a high level of craftsmanship and attention to detail - he was able to match the existing architecture of our home seamlessly, to the point that the addition looks like it has always been there. It was a unique design challenge, and McKay used thoughtful engineering to create a beautiful freestanding structure that feels both solid and elegant. His pricing was very fair, and we would give McKay and Platypus Construction our highest recommendation and would absolutely work with him again."
Matt W. Garage Addition & Pergola

Ready to become our next success story?

Join the growing list of homeowners and businesses who chose one team for design, engineering, and construction.

Start Your Project
Get In Touch

Let's Build Something
Together.

Whether you're planning a custom home, a commercial build-out, or just have questions — we'd love to hear from you. Tell us about your project and we'll reach out within one business day.

Licensed In Utah · Idaho · Arizona
Licensed & Insured
Response Within 24 hrs
No Obligation

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Utah (385) 314-4443