# Home Additions & ADU Builder Arvada CO | Arvada Remodeling Pros

> ADU and home addition builder in Arvada, CO. Detached, attached and garage-conversion ADUs for rental income. We navigate Arvada lot coverage and permits.

URL: https://arvadaproplumbing.com/home-additions-adu/

![Detached ADU with modern farmhouse exterior in Arvada](/images/misc/detached-adu-modern-farmhouse-exterior-arvada-sepa.webp)

Permit Specialists

# Room Additions & ADUs Built for Arvada Lots

Room additions and ADUs — detached, attached and garage-conversion — for rental income or multigenerational living.

Last updated: 6/9/2026

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Call 303-555-0123

[tel:303-555-0123 →](tel:303-555-0123)

From $60,000 per project, varies by type and size

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In-Home Estimate

Have you ever looked at your backyard and wondered what it would take to turn that extra space into a real asset?

Here at Arvada Remodeling Pros, our team talks to homeowners every day who want a second unit, but the city permit process stops them cold.

You can actually build more than you think.

## ADU Builder in Arvada: What You Can Actually Build on Your Lot

Most Arvada homeowners do not know exactly what they can build until they check the parcel data.

Our team knows that an accessory dwelling unit in Arvada can generate $1,500 to $2,500 a month in rental income, offset mortgage payments, and add long-term equity.

Getting there requires managing lot coverage ratios, setback requirements, utility connections, water tap fees, and full permitting through the City of Arvada Building Division or Jefferson County Community Development.

Colorado state law HB24-1152 completely changed the rules for local properties.

We see this new legislation creating massive opportunities, because it requires cities to allow at least one unit on single-family lots through simple administrative approval.

Your specific lot size dictates the exact square footage you can construct.

Our designers work with the city’s latest size caps, which limit units on lots under 6,000 square feet to 600 square feet of living space.

Larger lots over an acre can support a structure up to 1,200 square feet.

We handle all of it.

The specific additions built include:

-   **Detached ADU (Type A):** A true second dwelling that stands alone in your yard.
-   **Attached ADU (Type B):** A separate-entrance suite tied directly to the main home.
-   **Garage Conversions:** The most budget-friendly path to creating livable square footage.
-   **Basement-Conversion ADU:** An excellent option when ceiling height and exterior access work out.
-   **Traditional Additions:** Standard room, garage, and sunroom expansions for personal use.

Every project includes full architectural design, structural engineering stamps, permits, foundations, framing, MEP, and finish work.

### The parts that stall most ADU projects

Most ADU stories that go sideways do not fail on the build itself.

They fail on the paperwork: lot coverage ratios, setbacks, separate utility meters, the parking provision, and Jefferson County Community Development coordination.

We have run all of it, and we know exactly where the hidden traps are.

Utility connections are a classic stumbling block for new builders.

Our local experience shows that the City of Arvada requires water and sanitary sewer service for a second unit to connect directly to the primary dwelling’s lines.

The city strictly forbids separate water services for these units, though fire separation and a separate HVAC system are mandatory.

We plan for these exact specifications from day one so you never fail an inspection.

Setbacks and size limits also catch people off guard.

Our architects always verify your corner lot status, because Type A detached units must be set back at least 10 feet behind the main home’s facade in those locations.

Attached Type B units are strictly limited to 50% of the floor area of your primary home.

At the consultation, we pull your parcel data, run the basic feasibility, and tell you what’s possible.

> **Pro Tip:** Do not assume a massive budget is needed for new utility taps. Since Arvada requires tying into the primary home’s water and sewer lines, homeowners save significantly on system development charges compared to building a standalone home.

### Income, equity, and family: pick your goal

ADUs in the Denver metro commonly generate $1,500 to $2,500 per month in rental income.

We also see them add massive property value and give you a place for aging parents or returning adult kids.

These spaces can even serve as a short-term-rental income source where local rules allow.

Current market data shows just how profitable these units can be.

Our research indicates that the average rent for a standard one-bedroom apartment in Arvada reached $1,670 per month as of June 2026.

Building a backyard unit allows you to capture that premium neighborhood rent without buying a whole new property.

We design around your specific goal so the layout, soundproofing, and finishes perfectly match your intended use.

Here is a quick look at how different goals shape the build:

| Your Primary Goal | Recommended Design Focus | Financial Benefit |
| --- | --- | --- |
| Long-Term Rental | Durable finishes, separate laundry, sub-metered electricity | Steady $1,670+ monthly income to offset your mortgage |
| Aging Parents | Zero-step entries, wider doorways, accessible bathrooms | Avoids $4,000+ monthly assisted living facility costs |
| Short-Term Rental | Premium aesthetics, open layouts, easy cleaning surfaces | High nightly rates and fast equity growth |

### What “turnkey” actually means here

Turnkey construction means you never have to manage multiple contractors or decode city building codes.

We provide a comprehensive package that covers every single phase of the job.

The process includes full permitting through the City of Arvada Building Division or Jefferson County Community Development.

Our ground-up construction process includes:

-   **Design & Engineering:** Full architectural design with 3D renderings and a structural engineering stamp.
-   **Foundation & Framing:** Concrete footings, slab-on-grade or crawlspace foundations, and complete structural framing.
-   **Systems & Finishes:** Roofing, MEP (mechanical, electrical, plumbing), and all interior finishes.
-   **Utility Coordination:** Managing the necessary utility connections and water tap compliance.

Cost planning includes coordinating the tricky details, like Metro Water Recovery System Development Charges, which must be cleared before the city issues a Certificate of Occupancy.

Arvada’s updated 2024 Building Fee Schedule dictates these permit costs.

We wrap up the project with final inspections and a clean certificate of occupancy.

You get one contract, one project manager, and one clear timeline.

![Additions & ADUs detail view](/images/misc/detached-adu-construction-arvada-modern-farmhouse-.webp)

## How Much Does Additions & ADUs Cost in Arvada?

Garage-conversion ADUs start lower. Detached ADUs with utility connections land at the upper end of the range.

Typical project range

$60,000 – $250,000

per project, varies by type and size

Get Your Exact Quote

[/contact-arvada-remodeling-pros/ →](/contact-arvada-remodeling-pros/)

## See Your ADU Rental Income Potential

Enter your build cost and expected rent to see your net monthly income and simple payback period.

Calculate ADU Returns

[/tools/adu-rental-income-calculator/ →](/tools/adu-rental-income-calculator/)

## Why Choose Us for Additions & ADUs

### ADU Permitting Done Locally

Lot coverage ratios, setbacks, separate meters, and Jefferson County Community Development. We've navigated all of it.

### Rental-Income Focused Design

We design ADUs that rent well: private entrance, real kitchen, real bathroom, soundproofing, and separate utility access where allowed.

### Three Build Types, One Team

Detached, attached, or garage conversion — we'll help you choose based on your lot, your budget, and your end use.

### Turnkey from Concept to CO

Architectural design, structural engineering, full permits, ground-up construction, and a certificate of occupancy at the end.

## Our Additions & ADUs Process

One team from concept to final inspection.

1

### Free In-Home Consultation

We meet you at your home, listen to your goals, measure the space and talk through realistic budget ranges.

2

### Design + Fixed-Price Quote

3D renderings, material selections, and an itemized, fixed-price contract before any work begins.

3

### Permits + Build

We pull every Arvada and Jefferson County permit, then build with one project manager and weekly updates.

4

### Final Inspection + Warranty

Code inspection, walkthrough, punch-list cleanup and a workmanship warranty that backs the build.

## Our Additions & ADUs Work

![Detached ADU construction in Arvada](/images/misc/detached-adu-construction-arvada-modern-farmhouse-.webp)

![Garage conversion ADU studio](/images/misc/garage-conversion-adu-studio-suite-kitchenette-liv.webp)

![Attached ADU mother-in-law suite](/images/misc/attached-adu-addition-mother-in-law-suite-private-.webp)

![Sunroom addition with mountain views](/images/misc/sunroom-addition-arvada-south-facing-glass-walls-e.webp)

![Full ADU kitchen ready for rental](/images/misc/adu-kitchen-with-full-appliances-quartz-counters-c.webp)

## What Customers Say About Our Additions & ADUs

4.9★ rated by 50+ Greater Denver homeowners

> "They finished our basement exactly when they said they would, egress windows and all. The wet bar craftsmanship is incredible and it passed inspection the first time."

> "Our pop-top was a huge undertaking and their project manager kept us informed every single day. We added two bedrooms and a master suite without losing the yard."

> "We built a detached ADU for my mother and it already covers part of the mortgage as a rental when she travels. They handled every permit with the city."

> "Honest fixed-price quote, no surprise change orders, and the open-concept kitchen completely changed how our family uses the house."

> "Our 1970s master bath went from cramped to spa-like with a walk-in shower and heated floors. Clean crew, clear timeline, great result."

## Additions & ADUs FAQs

How much does it cost to build an ADU in Arvada?

Garage-conversion ADUs typically run $60,000 to $120,000. Attached ADUs run $100,000 to $180,000. Detached ADUs with their own utility connections range $150,000 to $250,000+ depending on size and finish.

What are Arvada's ADU regulations?

Arvada allows ADUs on many residential lots subject to lot coverage ratio, setback requirements, height limits, and parking provisions. Each property is different — we run a feasibility check at the consultation.

Can I build an ADU on my property?

Most likely, yes — but feasibility depends on your zoning district, lot size, existing structures, and setbacks. We'll pull your parcel data and tell you exactly what's possible at the free consultation.

How long does ADU construction take?

Garage conversions run 4 to 6 months from permit pull. Detached ADUs run 6 to 9 months including foundation, framing, and finishes. We share a Gantt-style milestone schedule before breaking ground.

How much rental income can an ADU generate?

ADUs in the Denver metro commonly rent for $1,500 to $2,500 per month depending on size, finish, and neighborhood. A $150k ADU pulling $2,000/month effectively pays for itself over time while adding property value.

Do I need a separate water tap?

Sometimes. Detached ADUs often require a separate water tap or sub-meter depending on Arvada utility rules. We coordinate the tap, the meter, and the inspection.

## Additions & ADUs Guides & Resources

In-depth answers on cost, permits, and planning for your additions & adus project.

-   ### Can I Build an ADU on My Property? Arvada Lot Coverage & Setbacks
    
    Find out if your Arvada lot qualifies for an ADU. Learn the lot size, zoning, coverage and setback factors and how a feasibility assessment works.
    
    [Can I Build an ADU on My Property? Arvada Lot Coverage & Setbacks →](/guide/can-i-build-an-adu-arvada-lot-coverage-setbacks/)
    
-   ### How Much Rental Income Can an Arvada ADU Generate?
    
    Arvada ADUs commonly rent for $1,500-$2,500/month. See the payback math, multigenerational uses and rental demand across the Denver metro.
    
    [How Much Rental Income Can an Arvada ADU Generate? →](/guide/adu-rental-income-arvada/)
    
-   ### How to Build a Code-Compliant ADU in Arvada & Jefferson County
    
    Your guide to Arvada ADU rules: lot coverage, setbacks, utilities, water tap fees and the permit steps to build a legal accessory dwelling unit.
    
    [How to Build a Code-Compliant ADU in Arvada & Jefferson County →](/guide/code-compliant-adu-arvada-jefferson-county/)
    
-   ### ADU vs. Home Addition: Which Is Better for Your Goals?
    
    Choosing between an income-capable ADU and an attached addition? Compare privacy, income, cost, permitting and resale impact.
    
    [ADU vs. Home Addition: Which Is Better for Your Goals? →](/guide/adu-vs-home-addition/)
    
-   ### How Much Does It Cost to Build an ADU in Arvada?
    
    ADU costs in Arvada by type — detached, attached and garage-conversion. See the price drivers and how rental income offsets the build.
    
    [How Much Does It Cost to Build an ADU in Arvada? →](/guide/adu-cost-arvada/)
    

## Related Services

![Pop-Top Additions](/images/misc/ranch-home-second-story-pop-top-addition-arvada-af.webp)

### Pop-Top Additions

Specialized vertical expansion for single-story ranch homes that can't build outward.

[Pop-Top Additions →](/pop-top-additions/)

![Garage & Attic](/images/misc/garage-conversion-to-living-space-arvada-insulatio.webp)

### Garage & Attic

Budget-friendly habitable space from existing garages and attics — no footprint change.

[Garage & Attic →](/garage-attic-conversions/)

![Basement Finishing](/images/misc/finished-arvada-basement-wet-bar-luxury-vinyl-floo.webp)

### Basement Finishing

Complete basement transformations — framing, egress, baths, wet bars, theaters and bedrooms — built for Colorado conditions.

[Basement Finishing →](/basement-finishing/)

![](/images/misc/modern-arvada-kitchen-remodel-with-quartz-counters.webp)

## Ready to Start Your Additions & ADUs Project?

Book your free in-home consultation and get an itemized fixed-price quote for home additions & adu construction.

Get a Free Consultation

[/contact-arvada-remodeling-pros/ →](/contact-arvada-remodeling-pros/)

 

Call 303-555-0123

[tel:303-555-0123 →](tel:303-555-0123)

Free, no-obligation in-home estimate