ADU Construction in Greater Seattle, WA
Build a custom ADU or DADU that adds value to your property and flexibility to your lifestyle. Pacent Construction specializes in ADU construction throughout Bellevue and the greater Seattle area, serving as your trusted ADU contractors in Seattle with experienced ADU builders and ADU designers.
What's Included in Our ADU Construction Services
When you work with Pacent Construction, you get comprehensive ADU construction support from start to finish:
Free ADU Design Consultation
Our in-house ADU designers will meet with you to discuss your vision and assess your property's potential. Our team of skilled ADU designers brings years of experience to every project.
ADU Permit & Zoning Assistance
We handle all the paperwork and navigate local regulations so you don't have to worry about compliance for your ADU construction project.
Transparent ADU Construction Cost Planning
Get clear, upfront estimates for your ADU construction cost with detailed breakdowns - no surprise charges or hidden fees.
Custom ADU Design & Architecture
Our ADU designers create layouts and select finishes that match your style and functional needs. Working with experienced ADU designers ensures your project is both beautiful and functional.
ADU Site Preparation & Utilities
From foundation work to connecting water, sewer, and electrical systems, our ADU builders handle all the technical details with precision and expertise.
Energy-Efficient ADU Building
Our skilled ADU builders use sustainable practices and modern building techniques to keep your ADU utility costs low.
Complete ADU Project Management
One point of contact manages your entire ADU construction from permits through final inspection.
Types of ADUs We Build
Our team of experienced ADU builders has experience with all types of accessory dwelling units, ensuring each one meets local codes and fits your property perfectly. As leading ADU contractors in Seattle with expert ADU designers, we handle every detail.
Attached ADUs
These units connect directly to your main house, making them perfect for maximizing your existing footprint.
Popular attached ADU construction options:
Basement conversions with separate entrances
Garage conversions with full amenities
Home additions on the side or back of your house
We design attached ADUs to maintain privacy between the main home and the new unit while making the most of your available space. Our experienced ADU builders ensure optimal functionality and code compliance.
Detached ADUs (DADUs)
Also called backyard cottages or carriage houses, these standalone units offer complete independence from your main home.
Common DADU uses:
Guest houses for visiting family
Rental units for extra income
Home offices or creative studios
Housing for aging parents
Stylish tiny homes with high-end finishes
Every detached ADU we build meets all local zoning requirements while delivering the functionality and style you want. Our ADU designers work closely with you throughout the process to ensure your vision becomes reality.
Why Build an ADU on Your Property?
Adding an ADU construction project is one of the smartest investments you can make in today's housing market.
Boost Your Home Value
ADU construction significantly increases property value and makes your home more attractive to future buyers in Bellevue's competitive market.
Generate Rental Income
Whether you rent long-term to tenants or use it for short-term vacation rentals, an ADU can provide steady income to help pay for your ADU construction cost.
Keep Family Close
An ADU gives aging parents or adult children their own space while keeping them nearby for support and connection.
Reduce Your Environmental Impact
Smaller, efficient ADUs use less energy and resources than traditional housing, helping you live more sustainably.
Adapt to Changing Needs
Your ADU can serve as a guest suite today, a teen hangout tomorrow, and a rental unit later - it grows with your life.
Stay Code Compliant
Our ADU contractors in Seattle handle all the legal requirements, permits, and inspections so your ADU is built right the first time.
Our ADU Construction Process
1. Free Consultation & Site Assessment
We start with a no-cost consultation to understand your ADU construction goals and budget. Our team visits your property to evaluate feasibility, access, and utility connections.
2. Custom Design Development
Our ADU designers work with you to create a floor plan that maximizes your space and matches your lifestyle needs and aesthetic preferences. Professional ADU designers ensure every detail is carefully planned.
3. ADU Permits & Approvals
We handle all the paperwork, submit permit applications, and coordinate with the city to ensure your ADU construction project meets all building codes and zoning requirements.
4. ADU Construction Phase
Once permits are approved, our experienced ADU builders get to work. Your dedicated project manager keeps you updated on progress and timelines throughout construction.
5. Final Walkthrough & Completion
We conduct a thorough final inspection with you, handle all city sign-offs, and make sure every detail meets your expectations before handing over the keys.
Why Choose Pacent Construction for Your ADU?
Specialized ADU Construction Expertise
We focus specifically on ADU construction, giving us deep expertise as ADU contractors in Seattle in local regulations, design best practices, and construction techniques.
Local ADU Knowledge
Based in Bellevue, we understand local building codes, permit processes, and what works well in our area's climate and neighborhoods for ADU construction.
Design-Build Convenience
With ADU designers and ADU builders under one roof, we streamline communication, reduce delays, and maintain better quality control throughout your project.
Honest ADU Construction Cost Estimates
We provide detailed, transparent ADU construction cost estimates upfront so you know exactly what your ADU will cost with no hidden surprises.
Full-Service ADU Support
From initial design through final inspection, we handle every aspect of your ADU construction so you can focus on planning how you'll use your new space.
Frequently Asked Questions
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Most ADU construction projects take 6-9 months from start to finish, including design, permitting, and construction. Timeline depends on the complexity of your project and permit approval speed.
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Often, yes! Many garages can be converted into detached ADUs or have an ADU built above them. Our ADU contractors in Seattle will assess your garage and lot to determine what's possible under local zoning rules.
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Yes, both long-term and short-term rentals are generally allowed, though specific regulations vary by city. We'll help you understand the rules that apply to your ADU construction project.
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Absolutely. Our ADU builders manage the entire permit process, coordinate inspections, and ensure your ADU meets all code requirements. You don't need to deal with city bureaucracy.
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Size limits typically range from 650 to 1,000 square feet depending on your lot size, zoning, and whether you're building attached or detached. Our ADU designers will help you maximize space within local regulations.
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Yes! While we specialize in ADU construction, we're also experienced addition builders in Seattle, offering home expansions, second stories, and other custom addition construction projects
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As much as you want! Our ADU designers work closely with you to balance your vision with practical considerations like budget, building codes, and site constraints. Experienced ADU builders then execute the plan to perfection.
Ready to explore adding an ADU to your Bellevue property? Contact Pacent Construction today for your free consultation and site assessment for ADU construction.
