Building Accessory Dwelling Units (ADUs) in Austin

From Design to Move-In: Your Backyard Doesn’t Need to Stay Empty

With Austin’s zoning reforms, adding an ADU—also known as a guest house, backyard cottage, or garage apartment—is easier than ever. These self-contained units let you create new living space, rental income, or a private suite for family—all without leaving the neighborhood you love.

But for most homeowners, the process feels overwhelming:

  • Permits and zoning are confusing
  • Coordinating multiple vendors leads to delays and frustration
  • Uncertainty about cost makes it hard to move forward


At Niesen Construction, we simplify the entire process from start to finish. If you’ve thought about adding an ADU but didn’t know how or where to begin—we’re your team.

Why Build an ADU?

  • Add space for family, work, or play without moving
  • Generate rental income that pays the mortgage—or more
  • Increase your property value and resale flexibility
  • Stay local, age in place, or bring family closer under one roof


Whether you need a full guest home, a detached studio, or a cozy rental suite, we’ll design and build a space that fits your lot, your budget, and your life.

What We Offer

Free Site Evaluation &
Concept Plan

We’ll visit your property, review zoning, and provide a concept layout based on your goals. This step is no-pressure, no-commitment.

Permitting & Zoning
Made Easy

Austin’s ADU code is changing fast. We stay current with every rule, setback, and utility requirement—so you don’t have to worry about compliance. We’ll handle city submittals and approvals for you.

Transparent Estimates
No Surprises

Our quotes are detailed and realistic. ADUs in Austin typically range from $150 to $300 per square foot depending on site access, utilities, and design. We’ll help you choose options that fit your vision and your budget.

Design & Build — All Under One Roof

We’re not just general contractors—we’re designers, builders, and project managers. That means better communication, fewer delays, and one team accountable from start to finish.

Customizable ADU Options

Austin’s ADU code is changing fast. We stay current with every rule, setback, and utility requirement—so you don’t have to worry about compliance. We’ll handle city submittals and approvals for you.

Not sure what fits your lot?
We’ll walk you through it.

Why Homeowners Choose Niesen Construction

  • Over 15 years in Central Texas building and remodeling homes
  • Hundreds of completed projects with real-world testimonials
  • Locally trusted with repeat business from clients and referrals
  • Transparent and professional from the first call to final inspection
  • Affordable, realistic pricing with no games or hidden costs

Frequently Asked Questions

Is my lot eligible for an ADU?

Most likely—Austin now allows ADUs on the majority of residential lots. We’ll confirm during your site visit.

How much does it cost?

Most projects range from $150–$300 per sq ft. We provide a custom estimate based on your site and goals.

How long does it take?

From design to completion, most ADUs are finished in 4–6 months, depending on permits and design choices.

Can I rent it out?

Yes. We’ll build to rental code standards if that’s your goal—e.g., kitchen, separate entrance, safety compliance.

Do I need to manage permits or inspectors?

Nope—we handle all permitting, communication with the city, inspections, and final approvals.

How the Process Works

Here’s how we take your ADU from idea to move-in:

Consultation & Site Review

Tell us your goals, and we’ll assess your property and zoning.

Design & Permit Submission

We create custom drawings and handle all approvals with the city.

Build & Finish

From foundation to finish-out, our in-house team handles every phase.

Walkthrough & Warranty

You inspect, we fine-tune, and your ADU is move-in ready.

Schedule A Free Consultation

Ready to Upgrade Your Space?