Additional Dwelling Units Construction

Additional Dwelling Units

Expand Your Space. Increase Your Property Value.

At Harris & Sons, we specialize in building fully customized Additional Dwelling Units (ADUs) that are tailored to meet your unique goals—whether it’s creating a private guest house, an income-generating rental, or extra space for family. ADUs are one of the smartest and most valuable ways to expand your living space, increase property value, and gain new functionality from your existing lot—all without the cost and stress of moving.

From backyard cottages and in-law suites to detached home offices or Airbnb rentals, we handle the full design-build process with care, precision, and a dedication to craftsmanship that’s made us a trusted name across the region.

What Our Clients Say

REVIEW US ON

We hired Harris & Sons to remodel part of our house and also build an addition. The project involved 3 bedrooms, 2 walk-in closets, and 2 bathrooms. Throughout the construction process, which had a few unforeseen complications, Harris & Sons worked to meet our expectations, gave us constructive options, and pushed to keep as close to the schedule as possible. They worked with us on controlling overall cost and understood and respected our financial capabilities and limits. In the end they gave us a beautiful and good quality home.

From our first meeting, Christian Harris stood out. Not only is he incredibly knowledgeable about construction and design, but he also brought a level of calm confidence that made us feel like our home was in the best possible hands. He took the time to understand our vision, walked us through every step of the process, and communicated consistently, something that’s rare in the construction world these days.

I met with Christian and a tall young man whose name escapes me, and was very impressed by their professionalism. They gave me a quote for remodeling after major water damage. Sadly I couldn't use them as I was fighting with my insurance company at the time!! I still think about the awesome job I KNOW they would've done for me and am still upset it never happened. Bobbie Pierson

We had Brian and his team Marcos & Jackson put in a privacy fence for us. The work done was outstanding and the fence looks great. I’m overjoyed by the job they did dealing with the ‘less-than-friendly” rock pile we live on. The work was done efficiently, clean, and fast. I don’t think I heard one curse-word uttered. These guys are clean, professional, quick, and darn good at what they do! I couldn’t recommend them more and we’ll be calling them again to put in our deck! Thx guys!!!

This team did such an amazing job building my pergola cover and enclosing my deck. Very professional and quality work. All of their suggestions for design were great, and I would recommend them for any project.

We have worked with Christian and his team for numerous projects around our home for the past year. They built and stained a beautiful fence for us, and also built a paver patio and pathway in our backyard. They are consistently friendly, communicative, and deliver high-quality work. Their employees are considerate and helpful. They have excellent follow-through from start to finish, and are exceptionally priced. We would highly recommend this team and we will continue to utilize their skills around our home going forward.

Our ADU Services Include:

Detached or Attached ADUs
Garage Conversions
Junior ADUs (JADUs)
Tiny Homes / Backyard Cottages
Guest Houses or In-Law Suites
Rental Units
Detached Offices or Studios

Everything You Need, All in One Place

Why Build an ADU
With Harris & Sons?

Complete Design & Build Expertise

We handle the entire process—from architectural planning and 3D design to permits, construction, and final walk-throughs. You get a team of experts who know how to streamline complex ADU projects while maintaining top-tier quality.

Zoning & Permit Guidance

Navigating local ADU zoning laws can be tricky. Our team understands city regulations and will take care of the red tape so your project is fully compliant—saving you time, money, and headaches.

Tailored to Your Needs

Whether you're building a rental unit, a home for aging parents, or a detached studio, your ADU is 100% customized for your lifestyle and property layout.

Maximized ROI

ADUs offer a great return on investment. Many clients use them to generate passive rental income or significantly boost property resale value.

Efficient, Stress-Free Construction

Our transparent process, clear communication, and fast-track scheduling ensure your ADU is delivered on time and on budget—without sacrificing quality.

See the Transformation

Beautiful ADU Work
We’ve Recently Completed

The Harris & Sons Difference

We’re not just builders—we’re partners in helping you create meaningful space and lasting value. Every ADU we build is treated as a signature project, and we take pride in delivering results that exceed expectations. Our team works closely with you to understand your vision, then brings it to life with a combination of craftsmanship, design excellence, and practical expertise.

With over two decades of experience, we’re known for delivering ADUs that aren’t just functional—but beautiful, energy-efficient, and built to last.

Ready to Expand Your Home Living Space with an ADU?

Let’s explore the possibilities together. We’ll review your property, listen to your goals, and provide a detailed plan of action—all with no obligation.

Got Questions?

Frequently Asked Questions

1. Can I legally build an ADU on my property?

Yes, in most areas—but it depends on local zoning laws and regulations. At Harris & Sons, we handle all the permitting and code compliance, so you can feel confident knowing your project meets all legal requirements. During your consultation, we’ll confirm your property’s eligibility.

2. How long does it take to build an ADU?

Project timelines can vary depending on the type of ADU, design complexity, and permitting requirements. On average, ADUs can take anywhere from 3 to 9 months from design to final construction. We provide a detailed timeline at the start of the project, and our team keeps you informed every step of the way.

3. How much does an ADU cost to build?

The cost of an ADU depends on the size, type (attached, detached, or converted space), finishes, and site conditions. At Harris & Sons, we offer free consultations and transparent pricing. We also provide flexible financing options, including no hard credit checks and rates starting at 6.99%, to make your ADU project more affordable.

4. Do ADUs increase property value?

Absolutely. ADUs are a smart investment—they often increase your property’s resale value and can generate passive income if used as a rental. In many cases, homeowners see significant ROI within a few years.

Additional Dwelling Units