Residential Design & Engineering

Residential Design and Engineering

Buildable residential plans and engineering for custom homes, ADUs, additions, and remodels across Idaho, Utah, and Arizona.

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

Residential Design and Engineering

Utah residential design and drafting for custom homes, ADUs, additions, and remodels. Integrated in-house structural and civil engineering.

  • Custom Homes
  • Adus
  • Additions
  • Remodels. Integrated In-house Structural
  • Civil Engineering
  • Remodels Across Idaho
Discuss Your Project
Residential Design & Engineering
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.

Residential Design & Engineering Services

Residential projects start with clear, well-coordinated plans. At Platypus Design and Construction, we specialize in architectural design, drafting, ADU planning, custom homes, remodels, additions, and residential engineering services across Utah.

By combining design, drafting, structural engineering, and civil engineering under one roof, we create a more efficient path from concept to construction. Homeowners don’t need to manage multiple consultants—our team delivers plans that are practical, buildable, and aligned with real-world construction.

Our Residential Design & Engineering Services

We focus on delivering complete, coordinated plans that support both design goals and construction execution.

Architectural Design

Our architectural design services focus on creating homes and spaces that reflect your lifestyle while remaining functional and buildable. We develop layouts, flow, and structural concepts that align with your property and long-term needs.

Drafting

Accurate drafting turns ideas into construction-ready plans. We provide detailed residential drawings that support permitting, pricing, and building.

Our drafting services include:

  • Construction drawings
  • Remodel and addition plans
  • Build-ready plan sets

Custom Homes & New Builds

We design custom homes tailored to your vision, property, and future needs. Our process ensures your home is not only visually appealing but also structurally sound and practical to build.

ADU Design (Accessory Dwelling Units)

We design ADUs that maximize space, functionality, and long-term value. Whether for rental income, family use, or flexibility, we create plans that align with local requirements and real-world site conditions.

Home Remodels & Additions

We design remodels and additions that improve how your home functions while integrating seamlessly with the existing structure.

This includes:

  • Whole-home remodel designs
  • Room additions and expansions
  • Layout reconfigurations

Walkout Basements & Basement Finishing

We design basements that add usable living space and improve property value. Walkout basements are planned to maximize access, light, and functionality.

Pool Houses & Accessory Structures

We design detached structures such as pool houses and other residential additions that enhance your property’s usability and value.

Engineering & Technical Services

A major advantage of working with Platypus Design and Construction is our ability to integrate engineering directly into the design process.

Structural Engineering

We provide in-house structural engineering to ensure your home, addition, or modification is safe, stable, and built to perform long-term.

This includes support for:

  • Structural design
  • Beam removals
  • Load-bearing modifications

Civil Engineering

Our civil engineering services support site-related planning, helping ensure your project is properly prepared for construction.

As-Built Plans

We create as-built drawings that accurately document existing structures—an essential step for remodels, additions, and structural changes.

Consulting

We offer residential consulting for homeowners who need expert guidance during planning or construction. Whether you’re early in the process or already underway, we help you make informed decisions.

A Smarter, Integrated Approach

Residential projects often become complicated when design and engineering are handled separately. Our approach combines architectural design, drafting, and engineering into one coordinated system.

Working with Platypus Design and Construction means:

  • Better alignment between design and engineering
  • Fewer revisions and delays
  • Clearer communication throughout the process
  • Plans that are practical to build

Designed for Real-World Construction

Good plans don’t just look good—they work in the field. Because we understand construction, our design and drafting process focuses on real-world execution.

We help:

  • Identify potential issues early
  • Improve buildability
  • Create smoother transitions into construction

Your Residential Design & Engineering Partner

If you need architectural design, drafting, ADU plans, custom home design, remodel plans, structural engineering, or civil engineering in Utah, Platypus Design and Construction is ready to help.

We provide the coordination, technical expertise, and practical insight needed to turn your ideas into buildable, high-performing residential spaces.

"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

Your information is secure and will never be shared.

Utah (385) 314-4443