An Accessory Dwelling Unit (ADU) gives your home new possibilities — whether you’re creating a private space for family, a long-term solution for multi-generational living, or an income-generating rental. At Kraft Custom Construction, we specialize in designing and building ADUs that are thoughtfully integrated with your property and tailored to your needs.
Since 1982, Willamette Valley, OR homeowners have trusted our team for projects that combine design expertise, careful planning, and long-lasting craftsmanship. With our guidance, your ADU will feel less like an add-on and more like a natural extension of your home.
Our ADU services include:
- Detached ADUs (backyard cottages, tiny homes)
- Integrated ADUs and basement/attic conversions
- Above-garage ADUs
- Multi-generational living spaces
- Income-generating rental units
- Accessibility-focused ADUs for aging in place
Building an ADU is an opportunity to rethink how your property supports your lifestyle. We focus on practical design, clear guidance, and long-term function so you can make informed decisions at every step. Whether your vision is clear or still taking shape, we help you understand your options and create an ADU that truly enhances your home.
Why Build an ADU?
ADUs are one of the most versatile home projects available — blending practicality, value, and lifestyle flexibility.
Expand Living Options
- Create independent living space for aging parents or grown children
- Offer privacy and comfort for guests or extended family
- Support multi-generational households
Future-Proof Your Home
- Add flexibility to adapt to changing life stages and needs
- Incorporate universal design features that allow accessible living for all
- Increase square footage without buying a new home
Generate Rental Income
- Use your ADU as a long-term rental or short-term vacation unit
- Offset mortgage payments with an income-generating space
- Increase property appeal for future buyers
Our ADU Design-Build Process
Building an ADU involves unique challenges — from zoning and permits to utility integration. With Kraft Custom Construction, you have a partner who understands the details and navigates the process with you.
Our process includes:
- Meet – Discuss your vision, goals, and intended use of the ADU
- Exploration – Assess your property, zoning requirements, and project investment costs
- Design – Develop detailed plans, layouts, and material selections
- Walk-Through – Review site conditions with trade partners for accurate pricing
- Proposal – Present a detailed, fixed-priced construction agreement and final plans
- Pre-Construction – Secure permits, order materials, and finalize schedules
- Construction – Build your ADU with expert craftsmanship and clear expectations
- Post-Construction – Final walkthrough, professional cleaning, and warranty-backed work
Communication and trust are the foundation of any successful relationship. Not only does the Kraft team provide the exceptional craftsmanship and design-build services homeowners are looking for, they are valued partners families welcome into their homes.
The Kraft Custom Construction Difference
ADUs require a contractor who is detail-oriented, experienced with complex permitting, and committed to seamless construction. For more than 40 years, Kraft Custom Construction has been delivering trusted, high-quality ADU projects for Willamette Valley homeowners.
Why choose Kraft for your ADU?
- Licensed, insured, and family-owned since 1982
- Woman-led, multi-generational design-build expertise
- In-depth experience navigating zoning and permitting requirements
- Transparent communication and honest pricing
- Expertise in both modern and historic home integration
- Trusted by repeat clients and multiple generations of families
Free eBook: What it's like to remodel with Kraft
A Guide to Thoughtful Design, Trusted Craftsmanship, and a Home You’ll Love Living In
Trusted by Homeowners Like You
From thoughtful design to skilled craftsmanship, our clients consistently share the difference our approach makes. Browse their reviews below.
Hearing directly from our clients gives you a sense of what it’s like to work with us — the communication, the craftsmanship, and the care we bring to every project. Now, as you continue exploring, take a look at some of the ADUs we’ve built. Each portfolio piece highlights how thoughtful design and expert construction can turn possibilities into finished spaces that enrich daily living.
See Our Work
From basement conversions in Portland to detached backyard cottages in Salem, we’ve created ADUs that meet homeowners’ unique goals while complementing their property’s character.
Sellwood-Moreland Basement Remodel
In this Sellwood Portland home, the basement was thoughtfully remodeled to create a fully livable accessory dwelling unit for a growing family. A reconfigured layout, new bathroom, and added egress window transformed the lower level into comfortable space for guests, work, and everyday living.
How can an underused basement become a thoughtfully designed living space?
Carriage House Conversion
This historic outbuilding was thoughtfully converted into a fully functional accessory dwelling unit. Updated systems, a carefully planned layout, and refined finishes transform the space into comfortable living quarters that complement the main home.
How can a historic outbuilding be reimagined as a modern living space?
Mid-Century Modern Remodel
In this mid-century home, the remodel included a rear studio addition designed to expand the home’s usable space while maintaining its clean architectural character. Thoughtful planning and natural materials helped integrate the new structure seamlessly with the existing home and landscape.
How can an addition expand a home’s possibilities while staying true to its original design?
ADU Frequently Asked Questions
How long does it take to build an ADU?
ADU construction timelines typically range from 4–7 months, depending on the type (detached or integrated into existing structure). The permitting and design process occurs beforehand.
Do I need a permit to build an ADU?
Yes. ADUs require permits, zoning approval, and utility planning. Our team manages the entire permitting process to keep your project on track.
What is the cost of an ADU in Salem and Portland, OR?
Costs vary widely depending on size, finishes, and whether it’s a new structure or a conversion. Many ADUs start around $200,000 and can exceed $350,000. We provide accurate budget ranges during our exploration phase.
Can my ADU be used as a rental?
Yes. Many homeowners use ADUs for long-term rentals or Airbnb-style short-term rentals. We help design spaces that meet code requirements while maximizing functionality and appeal.
Will an ADU increase my property value?
Absolutely. ADUs add square footage, rental potential, and flexibility, making your property more attractive to future buyers.
Ready to Build Your ADU?
With Kraft Custom Construction, your ADU project will be handled with care, precision, and creativity. Whether you’re planning for family, income, or future flexibility, we’ll help you create a space that truly works for your life.

