Looking for the perfect lot to build your dream home?

CORNERSTONE
Transforming Spaces with ADU Homes

At Cornerstone, we believe that great design transforms the way you live. Our expertise in creating ADU Homes in Ferndale and Bellingham allows homeowners to unlock the full potential of their property with spaces that are functional, stylish, and built to last. Whether you need extra living space, a rental unit, or a private retreat, our ADU Home Designs bring your vision to life.

Why Choose ADU Homes by Cornerstone?

Accessory Dwelling Units (ADUs) are more than just additional structures they’re flexible solutions that adapt to your lifestyle. With Cornerstone, you can expect:


• Smart use of space for comfort and practicality.
• Custom ADU Home Designs tailored to your needs.
• High-quality craftsmanship ensuring durability and long-term value.


When you choose Cornerstone in Ferndale or Bellingham, you get more than an ADU you get a carefully designed space that enhances your property and your life.

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Cornerstone

ADU Home Designs Crafted for Modern Living

Our ADU Home Designs in Ferndale and Bellingham balance creativity with functionality. Whether you dream of a cozy guest house, a home office, or an income-generating rental, we provide:


• Modern layouts that maximize natural light and space.
• Energy-efficient solutions for sustainable living.
• Personalized finishes that reflect your style.

 

At Cornerstone, we combine innovation with timeless design to deliver ADUs that are both beautiful and practical.

Preferred Builder in the Northwest

The Cornerstone Promise

We understand that building an ADU in Ferndale or Bellingham is an investment in your future. That’s why Cornerstone is committed to delivering excellence at every stage from design to construction. With our ADU Homes and ADU Home Designs, you can trust us to create spaces that add value, comfort, and possibility to your property.

Talk to one of our experts today!

Frequently Asked Questions

Yes, we specialize in ADU Homes and ADU Home Designs for homeowners in Ferndale, Bellingham, and surrounding areas.

We provide customized designs, transparent communication, and high-quality craftsmanship, ensuring every ADU reflects your lifestyle and goals.

On average, ADUs take 4–8 months, depending on design, size, and permit approvals. We provide a clear timeline from the start.

Yes. Our team manages the entire permit process, ensuring your ADU complies with all local zoning and building codes.

Absolutely. Many homeowners use ADUs as income-generating rentals or private guest suites, depending on local regulations.

The cost varies based on size, finishes, and design choices. We provide transparent estimates during the consultation stage.

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