ADU Plans
Accessory dwelling unit plans designed for real life — backyard cottages, granny flats, in-law suites, and casitas.
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ADU Plans
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ADU Plans Designed for How Families Actually Live
Every ADU plan in our collection began with a real conversation about a real family. Some needed a quiet place for aging parents to live close by without losing their independence. Others wanted a detached guest house for visiting family or a backyard cottage that could generate rental income. A few simply wanted a well-designed small home on their own lot — something compact, beautiful, and buildable.
I design each accessory dwelling unit plan with the same care and attention I bring to a full-size home. That means thoughtful layouts that make 600 or 800 square feet feel generous — not cramped. It means wide doorways, open sight lines, natural light, and a genuine connection between indoor and outdoor space. These are not afterthoughts or shrunk-down versions of bigger plans. They are intentional small homes.
What Makes Our ADU Floor Plans Different
Most ADU plans you will find online are generic catalog entries — designed once, sold thousands of times, with no thought given to climate, site, or the people who will actually live there. Our plans are different because they come from a Pacific Northwest design practice rooted in over 30 years of residential experience. They reflect the way light moves through a space in Oregon, how a covered entry works in a rainy climate, and why single-level living matters for aging in place.
- 1 and 2 bedroom ADU plans — compact layouts from under 500 sq ft to just over 1,000 sq ft
- Detached ADU floor plans — designed as stand-alone structures for backyard or side-lot placement
- Aging-in-place features — single-level living, no-step entries, wider hallways and doorways
- Contemporary and midcentury modern ADU plans — distinctive design, not builder-basic
- Oregon ADU compliance — plans designed with Pacific Northwest building codes in mind
Who Our ADU Plans Are For
If you are building a backyard cottage for your parents, a guest house for family visits, or a rental unit to help with your mortgage, these plans were drawn with you in mind. Our clients are typically owner-builders, homeowners adding a multigenerational living space, or small contractors looking for permit-ready plans with real design quality. If you value craftsmanship over volume and want a plan that feels considered rather than mass-produced, you are in the right place.
Frequently Asked Questions
What comes with an ADU plan?
Every plan includes detailed construction drawings — floor plans, exterior elevations, roof plans, building sections, and foundation details. You receive a complete, permit-ready set that your builder or building department can work from immediately.
Can I modify an ADU plan?
Yes. I offer direct collaboration on modifications — adjusting layouts, adding features, or adapting a plan to your specific lot and local codes. You work directly with me, not a ticket queue.
How much does it cost to build an ADU?
Construction costs vary widely by region, but a typical detached ADU in the Pacific Northwest ranges from $150,000 to $350,000 depending on size, finishes, and site conditions. The plan itself is a small fraction of that investment — and the right plan can save you tens of thousands by avoiding costly changes during construction.