# ADU Construction in Arvada, CO

> ADU construction in Arvada from a licensed general contractor who handles Jefferson County permits, HOA review, and fixed-price builds. Get a free in-home estimate.

URL: https://arvadaremodelingpros.com/adu-construction-arvada/

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

# ADU Construction in Arvada

A licensed Arvada contractor builds your accessory dwelling unit from permit to final inspection, with one fixed-price contract.

Last updated: 2026-07-06

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From $120,000 per project, varies by scope

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## What Is an ADU and Who Needs One in Arvada?

In Arvada, an accessory dwelling unit (ADU) is a legal second home built on your existing lot. It can sit above a garage, attach to the side of your house, or stand alone in the backyard. This page covers what an ADU is, who builds one and why, and what Jefferson County and the City of Arvada require before you break ground. We are a Jefferson County Building Permit Specialist, and every ADU we build runs on one fixed-price contract. No surprise change orders halfway through the job.

Most homeowners call us for one of two reasons. They need space for aging parents or an adult child. Or they want rental income from land they already own. Either way, an [ADU can add real rental income and long-term property value](https://www.investopedia.com/accessory-dwelling-unit-adu-5218638) that you control directly. But the paperwork matters as much as the framing. Newer Arvada neighborhoods like Leyden Rock and Candelas run their own architectural review committees, and an ADU that changes your roofline usually needs HOA sign-off before the city even looks at your plans. That HOA review runs its own 30-day clock, separate from the city's permit timeline.

Every Arvada ADU project starts the same way: a site visit, a review of your lot and HOA covenants, and a plan that fits your budget and your goals. From there, the scope depends on which type of ADU makes sense for your property. See our full [ADU cost guide](/guide/adu-cost-arvada/) for a size-by-size breakdown.

| ADU Type | Typical Size | Price Range | Best For |
|---|---|---|---|
| Garage conversion | 400-600 sq ft | $80,000-$140,000 | Fastest permit path, existing footprint |
| Attached ADU | 500-800 sq ft | $120,000-$200,000 | Aging parents, shared utilities |
| Detached ADU | 600-1,000 sq ft | $150,000-$250,000 | Rental income, full privacy |

### Scope on a Typical Arvada ADU Project

- Site visit and lot coverage review against Jefferson County and Arvada zoning
- HOA covenant check for neighborhoods with architectural review committees
- Design and engineering sized to your lot, including foundation type
- Full permit submittal through the city's eTRAKiT system
- Foundation and framing, matched to your home's existing structure or built freestanding
- Rough-in electrical, plumbing, and HVAC
- Interior finish: flooring, cabinets, fixtures, paint
- Final inspection and certificate of occupancy

### Permits, Soil, and the Arvada Timeline

City of Arvada permitting runs through the eTRAKiT online system at arvadapermits.org. A clean submittal for an ADU typically gets a first review in 10 to 15 business days. If the plan reviewer comes back with corrections, and on a first ADU submittal they often do, add another 2 to 4 weeks before you get a permit in hand.

One thing we see constantly on Arvada ADU projects is homeowners who forget the soil under their yard. This stretch of the Front Range sits on expansive clay that swells when wet and shrinks when dry. A detached ADU on its own foundation needs a footing designed for that movement, not a copy of whatever your house sits on.

So we build float into every schedule. Spring and summer are prime season for Denver-metro subcontractors, and electricians and plumbers booking out 3 to 4 weeks isn't unusual. A January start often moves faster on labor, even though weather adds its own variable.

### Materials We Trust

We build ADUs to last through Colorado winters and hail season, not just to pass inspection.

- **Engineered floor and roof trusses** — hold their shape better than dimensional lumber on a detached footing
- **Class 4 impact-resistant shingles** — matched to your main house where the ADU is visible from the street
- **Helical pier or reinforced spread footings** — sized for expansive clay soil, not a generic slab
- **Ductless mini-split HVAC** — heats and cools a detached ADU without tying into your home's existing system

Ready to see what fits your lot? Book a free in-home estimate and we will walk your property, check your HOA covenants, and give you a fixed-price number before you sign anything.

## How Much Does ADU Construction Cost in Arvada?

Typical project range: $120,000-$250,000, per project, varies by scope.

Get Your Exact Quote — [/contact-arvada-remodeling-pros/ →](/contact-arvada-remodeling-pros/)

## Estimate Your ADU Construction Cost

Use our free calculator to get a ballpark budget based on size and finish level — before your consultation.

Try the Free Estimator

[/tools/remodel-cost-estimator/ →](/tools/remodel-cost-estimator/)

## Why Choose Us for ADU Construction

**Jefferson County Permit Specialists** — We handle your ADU submittal through eTRAKiT and know what plan reviewers look for the first time.

**Licensed & Insured** — Every Arvada Remodeling Pros project runs under our Colorado general contractor license and full insurance coverage.

**One Fixed Price** — Your quote covers the whole job. No change orders you didn't agree to.

**Recognized Craftsmanship** — Arvada Remodeling Pros is a Qualified Remodeler Top 500 honoree and a REMODELING Big50 inductee.

## Our ADU Construction Process

One team from concept to final inspection.

**1. Free In-Home Consultation** — We walk your lot, check HOA covenants, and talk through what you need the space for.

**2. Design + Fixed-Price Quote** — You get a design sized to your lot and one number covering the whole build.

**3. Permits + Build** — We submit through eTRAKiT, pull permits, and build to the schedule we gave you.

**4. Final Inspection + Warranty** — The city signs off, and your ADU is covered under our workmanship warranty.

## Our ADU Construction Work

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

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

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

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

![ADU cost by type chart comparing detached, attached, and garage conversion options](/images/misc/adu-cost-by-type-chart-detached-attached-garage-co.webp)

## ADU Construction FAQs

**How long does ADU permitting take in Arvada?**
Most clean ADU submittals get a first review from the city in 10 to 15 business days through the eTRAKiT system. If the reviewer asks for corrections, plan on another 2 to 4 weeks before your permit is ready.

**Do I need HOA approval to build an ADU in Arvada?**
In neighborhoods with an architectural review committee, like Leyden Rock and Candelas, yes. Any ADU that changes your roofline or is visible from the street usually needs HOA sign-off, and that review can add its own 30-day timeline before the city permit process starts.

**How much rental income can an ADU generate in the Denver metro?**
ADUs in the Denver metro commonly rent for $1,500 to $2,500 a month, depending on size, finish level, and location. See our [ADU rental income guide](/guide/adu-rental-income-arvada/) for a breakdown by ADU type.

**What's the difference between an ADU and a home addition?**
An ADU is a separate living space with its own kitchen, bathroom, and entrance. A home addition adds square footage to your existing living space but isn't a standalone unit. Read our [ADU vs. home addition guide](/guide/adu-vs-home-addition/) for the full comparison.

**Can my lot support a detached ADU?**
It depends on your lot coverage and required setbacks under Jefferson County and Arvada zoning. We check this during your free site visit. Our [lot coverage and setbacks guide](/guide/can-i-build-an-adu-arvada-lot-coverage-setbacks/) covers the basics before we meet.

**What foundation type is best for an Arvada ADU?**
It depends on your soil and whether the unit is attached or detached. This part of the Front Range sits on expansive clay, so a detached ADU often needs a helical pier or reinforced footing designed for that movement, not a standard slab.

## ADU Construction Guides & Resources

- [ADU Cost in Arvada](/guide/adu-cost-arvada/)
- [ADU Rental Income in Arvada](/guide/adu-rental-income-arvada/)
- [ADU vs. Home Addition](/guide/adu-vs-home-addition/)
- [Lot Coverage & Setbacks for Arvada ADUs](/guide/can-i-build-an-adu-arvada-lot-coverage-setbacks/)

## Ready to Start Your ADU Construction Project?

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

Get a Free Consultation

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

Call (720) 734-3919

[tel:+17207343919 →](tel:+17207343919)

Free, no-obligation in-home estimate