Additional Dwelling Units (ADUs)

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Residential ADU Contractor

The landscape of Colorado living is evolving, and Trio Construction is at the forefront of this transformation through bespoke Additional Dwelling Units. We specialize in creating independent living spaces that seamlessly integrate with your primary residence, offering a refined solution for multigenerational housing or rental opportunities. Discover how our white-glove approach can elevate your property’s potential and provide lasting architectural value by contacting our design team today.

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The Strategic Value of Colorado ADUs

Investing in an Additional Dwelling Unit is more than a construction project; it is a strategic asset for your estate. Under Colorado House Bill 24-1152, the barriers to expanding your property have been significantly reduced, allowing homeowners to bypass restrictive HOA hurdles. Whether you are seeking to accommodate aging parents in a sophisticated setting or generating premium rental income, our units provide the independent facilities required for a complete living experience.

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An Investment in Quality and Craftsmanship

High-end construction requires a transparent understanding of investment scales and value. While a Trio-built ADU represents a significant financial commitment, the return is found in the meticulous attention to detail and premium materials used. Detached units typically range from $300 to $450 per square foot, while integrated conversions range from $250 to $350. This investment ensures your new structure is not just a building, but a seamless extension of your home’s existing prestige and aesthetic.

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Sophisticated Project Timelines

Quality cannot be rushed, and our timeline reflects the precision required for high-end results. A typical project encompasses two to four months of meticulous planning and design, followed by a two to six-month permitting phase to ensure full compliance with local Colorado jurisdictions. The physical construction takes approximately four to seven months, during which our team maintains a clean, respectful, and professional job site environment. Experience the difference that professional project management makes by scheduling your initial discovery consultation with our partners.

Versatile Architectural Solutions

Our team approaches every project with a commitment to architectural integrity and site-specific design. We don’t believe in one-size-fits-all solutions, especially when catering to a high-end clientele. Trio Construction offers several pathways to expansion:

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Detached ADUs

Completely independent structures providing maximum privacy.

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Garage Conversions

Transforming existing footprints into modern, high-functioning suites.

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Basement Conversions

Utilizing lower levels for discreet, fully-equipped flats.

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Attached Additions

Seamlessly extending your home’s architecture for connected living.

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Unmatched Warranty and Security

Peace of mind is the ultimate luxury. Trio Construction stands firmly behind our craftsmanship with a comprehensive 10-year workmanship warranty, a testament to the confidence we have in our integrated building approach. In addition to our internal guarantee, we pass all manufacturer warranties directly to you, ensuring that every high-end appliance and material used in your ADU is protected for the long term. This commitment to transparency and longevity is the cornerstone of the Trio Construction brand.

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The Trio Seven-Step White-Glove Process

We have refined our project management into a structured, seven-step journey designed to eliminate the typical stresses of construction. Our goal is to provide a "white-glove" experience where communication is proactive and the path forward is always clear.

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Discovery

We begin with a deep dive into your vision and property goals.

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Professional Service Agreement (PSA)

A formal due-diligence phase for design and cost certainty.

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Project Development

Logistics, material selection, and site planning are finalized.

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Construction Agreement

A transparent contract that locks in your project details.

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Project Management

Expert oversight of every artisan and schedule.

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Completion

Rigorous inspections and a detailed warranty walkthrough.

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Enjoyment

Handing over the keys to your new, refined space.

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Navigating Colorado’s New ADU Regulations

Following the full implementation of House Bill 24-1152, Colorado homeowners across the Front Range enjoy a streamlined administrative permitting process. Restrictive owner occupancy mandates and extra parking rules are now limited by DLG guidelines. Partnering with a knowledgeable builder ensures your addition complies perfectly with local setback and size requirements. Contact us today to check your lot eligibility.

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Maximizing Space with Garage Conversions & Pop-Tops

Transforming your home does not always require a massive footprint expansion. Elite garage conversions turn underutilized spaces into stunning luxury suites. Alternatively, second story additions or pop tops allow you to build upward, capturing beautiful Colorado mountain views without sacrificing backyard acreage. Trio Construction expertly designs these structural solutions to elevate your property value.

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Custom Traditional Additions for Luxury Living

When your estate demands a classic footprint expansion, custom traditional additions offer the ideal option. We integrate these custom builds onto your main structure, expanding your floor plan for master wings or separate guest quarters. Every phase adheres strictly to updated local zoning codes. Schedule your free consultation with Trio Construction to explore premier architectural possibilities.

PAst ADU projects

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Colorado Accessory Dwelling Units (ADUs): Frequently Asked Questions

Thinking about adding an Accessory Dwelling Unit (ADU) to your property? Whether you want to build a private guest suite for family, downsize on your own lot, or create a premium short-term rental, navigating Colorado’s shifting land-use laws can feel overwhelming.

At our core, we specialize in custom-built ADU solutions designed to perfectly complement your existing home's architecture. Here are the honest answers to the questions Colorado homeowners ask us most during the research phase.

Feasibility & Rules

Am I legally allowed to build an ADU on my lot?
Thanks to recent Colorado state legislation (House Bill 24-1152), many of the old zoning hurdles have been cleared across the Front Range. If you live in a qualifying municipality and your lot is zoned for a single-family detached home, cities must allow ADUs by right through an administrative review process.

However, local rules regarding building height, property line setbacks, and "bulk plane" restrictions (the invisible legal envelope that limits your building's shape so it doesn't block your neighbor's light) still apply. We offer a Free Feasibility Assessment where we pull your property's specific GIS and zoning data to see what is legally possible before you spend a dime.
My HOA says ADUs are banned. Can they stop me?
Under current Colorado law, absolute HOA bans on ADUs are void. Your HOA cannot flatly deny your right to build one. However, they do retain the right to enforce reasonable architectural guidelines. This means they can require the ADU to match your main home’s siding material, paint colors, and roof pitch. Because we build completely custom solutions, we actively design our projects to blend seamlessly into your neighborhood and handle the HOA approval process for you.

Costs, Financing & The "Price Guarantee”

How do you prevent unexpected costs and change orders?
We do not believe in guessing your budget from the back of a truck. To guarantee your pricing, we utilize a Pre-Construction Service Agreement (PSA) phase.

Before we sign a final construction contract, the client pays directly for the necessary soft costs: a property survey, a geoscientific soils report, structural engineering layouts, and local utility tap fee assessments. In Colorado, these initial site and utility factors can swing project costs significantly. By doing this homework upfront, we deliver a guaranteed project price and eliminate the surprise change orders that plague other construction projects.
Can I use state grant money to fund my ADU?
While Colorado has dedicated millions of dollars to ADU funding, the vast majority of state grant money is reserved for commercial developers building massive affordable housing tracts. Homeowners utilizing government funding must commit to strict rent-caps for lower-income brackets. Because we focus on high-end, custom residential builds, our clients typically fund their projects through traditional private financing pathways:
  • HELOCs (Home Equity Lines of Credit) or Cash-Out Refinancing
  • Residential Construction Loanss
  • DSCR Loanss (Debt Service Coverage Ratio loans, which are construction loans qualified based on the projected rental income of the ADU)

Product Options & Process

Do you offer prefab or modular units, or only custom builds?
Our true expertise lies in custom, stick-built solutions built directly on-site. This allows us to handle tricky Colorado slopes, tight backyard access points where a crane can't drop a modular box, and custom architectural matches. However, if you are curious about alternative methods, we maintain close relationships with preferred partners in the prefab space—including cutting-edge 3D-printed and eco-recyclable home manufacturers—and we can guide you through the pros and cons of each.
Will construction take over my entire backyard?
Building a permanent home in a backyard requires heavy machinery, utility trenching, and material staging. There will be a footprint of disruption for a few months. However, our team takes site management incredibly seriously. We establish clear safety boundaries, keep strict working hours, protect your existing landscape, and manage the site so your daily routine remains as uninterrupted as possible.

Get Real Answers for Your Backyard

Don't guess at what's possible. Let us look at your specific lot, zoning rules, and utility access points.

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Customer Trust

We are proud to have earned a stellar 5/5 star rating on Google, a testament to our commitment to delivering outstanding services.

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Top Rated Local®

We are proud to be recognized as a Top Rated Local® company in the Denver area, reflecting our unwavering dedication to quality service and customer satisfaction.

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Highly Recommended

We are thrilled to maintain a perfect 4.8-star rating on Angi's List, showcasing our dedication to providing exceptional services.

Elevate Your Property’s Legacy

Our pursuit of excellence ensures that your new Additional Dwelling Unit is a masterpiece of function and form. By choosing Trio Construction, you are partnering with a team dedicated to elevating the standard of Colorado residential building through integrity and superior design. We invite you to view our portfolio of recent high-end builds and start the conversation regarding your property's future today.

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