ADU Design & Construction in Bellevue

Transform Your Property With a Fully Custom, High-Quality Accessory Dwelling Unit

An Accessory Dwelling Unit (ADU) is one of the most valuable additions you can make to your property — providing extra living space, long-term rental income, multi-generational housing, or a private suite for guests. At AVEAD Construction, we specialize in designing and building high-performance ADUs that combine smart space planning, architectural integrity, and premium craftsmanship.

As Bellevue’s trusted ADU contractor, we handle everything from concept and permitting to engineering and construction. Our goal is to create a beautifully built, highly functional unit that enhances your property’s value and integrates seamlessly with your home’s existing architecture.

Full-Service ADU Design-Build in Bellevue

Building an ADU requires careful coordination between architects, engineers, designers, and builders — and AVEAD brings all of these disciplines together under one roof. Our design-build model streamlines the process, reduces cost and schedule risks, and ensures that every detail aligns with your goals and local building codes.

Our design-build process ensures:

• A single, accountable team managing your entire ADU project
• Faster timelines through integrated planning and scheduling
• Architectural designs tailored to your property and zoning
• Engineering and permitting handled in-house
• Clear communication from start to finish
• Premium craftsmanship at every stage

This seamless approach eliminates stress and guarantees a high-quality, code-compliant ADU built to last.

Custom ADU Designs Tailored to Your Property

Every ADU begins with a thoughtful design that maximizes space, comfort, and usability. Whether your project is a detached ADU, attached ADU, or garage conversion, we create solutions that look refined, feel spacious, and function beautifully.

Our ADU design services include:

• Site evaluation and feasibility studies
• Space planning and architectural layout
• Exterior design that complements your home
• Interior design, material selection, and custom finishes
• 3D renderings and digital previews
• Engineering for structural, electrical, and plumbing systems

From a modern studio to a full two-bedroom private residence, your ADU is designed with intentionality and precision.

High-Quality ADU Construction Built to Last

ADUs require advanced construction expertise — from structural engineering to complex utility integrations. As a licensed, bonded, and insured ADU contractor, AVEAD executes every phase with precision and care, ensuring durability, comfort, and efficiency.

Our ADU construction capabilities include:

• Ground-up detached ADU builds
• Attached ADUs and home additions
• Garage, basement, and attic conversions
• Foundations, framing, and structural modifications
• Plumbing, electrical, HVAC, and utility expansions
• Waterproofing, insulation, and sound control
• High-end interior finishes and custom millwork
• Energy-efficient systems and modern building materials

We follow industry-leading building practices to ensure your ADU is long-lasting, comfortable, and compliant with all Bellevue and state regulations.

Types of ADUs We Build

AVEAD Construction offers flexible ADU solutions designed to meet the needs of modern homeowners, investors, and multi-generational families.

Detached ADUs (DADUs)

Standalone living units ideal for rental income, guest housing, or private living.

Attached ADUs

Expansions that integrate seamlessly with your home’s architecture.

Garage Conversion ADUs

Turn an unused garage into a stylish and fully functional living space.

Basement ADUs

Add a self-contained suite with private entry, kitchen, bath, and living area.

Multi-Generational Living Suites

Comfortable, private, and accessible units for family members.

Luxury ADUs

High-end builds featuring premium materials, custom layouts, and designer finishes.

Why Homeowners Choose AVEAD for ADU Construction

Homeowners across Bellevue and the Eastside choose AVEAD because we bring sophistication, precision, and professionalism to every ADU project.

What sets AVEAD apart:

• Comprehensive design-build ADU services
• 3D visualizations and detailed planning
• Transparent pricing with no material markups
• Code-compliant engineering and permitting
• Clean, highly skilled work crews
• On-time schedules and consistent communication
• A 5-year workmanship warranty
• 20+ years of remodeling and construction expertise

We don’t just build ADUs — we build long-term value and peace of mind.

Our ADU Building Process

1. Consultation & Feasibility Study

We assess your property, zoning requirements, and your vision for the ADU.

2. Concept Design & 3D Renderings

We develop layouts, material selections, and exterior concepts tailored to your property.

3. Engineering & Permitting

We prepare construction plans, structural calculations, and handle city approvals.

4. Construction & Quality Control

Our craftsmen execute every detail — foundation, framing, utilities, interior finishing — with exceptional precision.

5. Final Walkthrough & Warranty

We review everything with you and back the project with a 5-year workmanship warranty.

Maximize Your Property’s Potential With a Custom ADU

A carefully designed and beautifully built ADU adds flexibility, income potential, functionality, and significant resale value. Whether you’re creating a private guest suite, rental unit, home office, or multi-generational living space, AVEAD Construction delivers exceptional results with luxury-level detail.

Your ADU is more than an addition — it’s an investment in your property and your future.

Let’s build something extraordinary — one unit at a time.‍