Providing High Quality Accessory Dwelling Units for Whatcom & Skagit County

Are you ready to add an income producing asset to your property? Bellingham ADU delivers the ultimate prefab ADU experience! We take pride in transforming your vision into reality, seamlessly guiding you "From thought to finish."

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A modern two-story house with white siding and a wooden deck with outdoor seating, located in a backyard surrounded by trees and a wooden fence.

How It Works

  • Icon of a clipboard with a pencil, representing editing or filling out a form.

    Step 1

    Fill out the initial inquiry form. We'll begin assessing your property to confirm its suitability in terms of location, zoning, and accessibility.

  • Icon of two overlapping speech bubbles, representing dialogue or conversation.

    Step 2

    We'll reach out to you and arrange a site visit to explore your preferred model and pinpoint the ideal spot for your tiny home.

  • Outline of two hands shaking.

    Step 3

    After selecting a model and discussing estimated costs, a non-refundable fee will be collected as you proceed to the permitting process.

  • Icon of hands holding a tablet displaying home designs and digital interface elements.

    Step 4

    Sign the builder contract, and we'll provide you with a completion date for your project.

View ADU Models

Located Locally in Whatcom County 

View of a covered porch with outdoor chairs overlooking a neighborhood near a lake, with trees, houses, and a cloudy sky in the background.
A bedroom with two beds, each with black and gray pillows, white nightstands, and white lamps. A window with a view of trees and rooftops is seen in the background.
Kitchen with a white countertop, stainless steel sink, window, wooden ceiling, and appliances including a microwave and stove. There is a soap dispenser and small plants on the counter. A coffee maker and framed sign are on a side counter.
Interior view of a modern living room with a blue sofa, armchair, coffee table, fireplace, wall-mounted TV, and a kitchen area in the background.

What are the Rules for an ADU?

Starting July 1, 2025, new state and local rules make it easier than ever for Bellingham homeowners to build an accessory dwelling unit (ADU) or backyard cottage. You’ll be able to add up to two ADUs per lot, with larger size limits, streamlined permits, and—after a short transition—no owner-occupancy requirement. Off-street parking isn’t required for ADUs near frequent transit, and options like garage or basement conversions are now easier. Bellingham’s new rules create more housing choices for families, renters, and homeowners alike—while maintaining important protections for neighborhoods and the environment.

Learn More Here

Ready to maximize your property’s potential?

Are you curious about our ADU solutions? Share your details, and our team will respond promptly. If you prefer, you can also call us at (360) 524-4073. Or you can email us at sales@bellinghamadu.com. We look forward to connecting with you!

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