Residential general contracting
ADU builder in Eagle Mountain, UT
Custom-built accessory dwelling units (ADUs) for guest houses, in-law suites, home offices, and rental income, attached or detached, in Eagle Mountain and Utah County.
- Service line
- Residential
- Utah GC license
- #123331-5501
- Serving
- Eagle Mountain
- Pricing
- Written, up front
An accessory dwelling unit (ADU) is a self-contained living space on the same lot as your home. It can be a detached guest house, an in-law suite attached to the main house, or a backyard rental. Diamond L Contracting builds ADUs that fit your property, your city’s rules, and how you plan to use the space.
Why build an ADU
- Rental income from a long-term tenant
- Family living space for aging parents or adult kids, with privacy on both sides
- A guest house or a home office away from the main house
- Higher property value and more flexibility when you sell
What we handle
We handle everything: design, permits, construction, and final touches. Before any plans are drawn, we check your lot and your city’s ADU requirements, including size limits, setbacks, parking, and utility connections, so you know what you can build.
Materials we use
- Framing and insulation: Advanced framing with spray foam and rigid insulation for year-round comfort and lower energy bills.
- Flooring: Luxury vinyl plank (LVP), engineered hardwood, or tile that holds up to everyday living.
- Ceilings and lighting: Vaulted ceilings, recessed lighting, and sound-reducing materials for a quiet space.
- HVAC: Heating and cooling sized for the unit.
- Custom features: Built-in cabinetry, kitchenettes, ADA-accessible options, smart home features, and private entries.
What’s included
- 01Custom design to match your home and lot
- 02Zoning review and permits
- 03Foundation, framing, and roofing
- 04Plumbing, electrical, and HVAC
- 05Kitchenette and bathroom
- 06Private entrance and finishes
Final scope is written into your estimate before any work starts.
Our process
How an ADU project runs.
05 steps. One point of contact the whole way through.
- Step 01
Consultation
We go over your ideas, your needs, and your property layout.
- Step 02
Design & planning
Custom plans that fit your lot and your city's ADU rules.
- Step 03
Permitting
We manage the permit applications and city approvals.
- Step 04
Construction
Our crew builds your ADU with quality materials and craftsmanship.
- Step 05
Completion & move-in
Final inspection, walkthrough, and handoff of your new space.
What is an accessory dwelling unit (ADU)?
An ADU is a secondary, self-contained living space on the same lot as an existing home. It can be attached, detached, or converted from an existing space like a garage or basement. ADUs are used for guest housing, rental income, or private living space for family members.
How long does it take to build an ADU?
Most ADU projects take 4 to 8 months from initial planning to final inspection. The timeline depends on size, design, and the city's permitting process. Converting an existing basement or garage is usually faster than building a detached unit.
Do I need a permit to build an ADU?
Yes. Permits are required for ADU construction. We handle the permit applications and work with your city's building department so the unit meets zoning and building code requirements.
Can you build both attached and detached ADUs?
Yes. We build detached ADUs as separate structures and attached ADUs connected to the main home, depending on your property, your goals, and what your city allows.
How big can my ADU be?
Allowed size depends on your city's zoning rules. Most ADUs fall between 400 and 1,200 square feet. We check your lot and local requirements early and help design a unit that makes the most of the space you're allowed.
Can the ADU match my home?
Yes. We design ADUs to complement your existing home's style and architecture, with matching siding, roofing, and trim, so the new unit looks like it belongs on the property.
Areas served