A guided path to the backyard home you actually need.

Trail Guide ADU Co. helps Corvallis-area homeowners simplify the ADU process and pursue a more cost-effective path to the space they actually need.

You likely have a specific, functional goal that brought you here: rental income, space for an aging parent, a place to age in place, or flexible room for family.

Trail Guide helps keep that purpose front and center from the start.

ADUs are exciting. The process can be confusing.

Many homeowners are interested in adding an ADU, but stall because it is hard to know where to begin.

Before you can make a confident decision, you may need to sort through zoning, setbacks, budget, utilities, permits, financing, design options, builders, site constraints, and what is actually included in a quoted price.

Trail Guide helps make the early process clearer by organizing the big questions, identifying the decisions that matter most, and helping you understand what needs to be true before moving forward.

Early decisions shape ADU costs.

ADU budgets can quickly spiral when every detail is treated as a custom decision.

Custom floor plans, one-off site layouts, finish selections, and design details can add direct costs for architecture and design, create more estimating work for builders, and reduce the efficiency that comes from repeating a simpler, more defined scope. Those added costs can then be compounded through overhead, markup, and change management as the project moves forward.



Trail Guide helps reduce those cost-driving variables through a more structured planning process:

Standardized ADU options
Explore curated, pre-designed ADU pathways instead of starting from a blank page.

Fewer custom changes
Limit floor plan changes to reduce design churn, estimating uncertainty, and avoidable complexity.

Site and risk screening
Flag the questions that often affect cost: setbacks, utilities, foundation assumptions, access, permitting, soft costs, and what is or is not included.

Builder-ready handoff
Give builder partners a better-scoped, better-informed homeowner — not just a vague inquiry.

A simpler way to start: pre-designed, stick-built ADU options.

Instead of asking homeowners to begin with a blank page, Trail Guide uses a more standardized ADU pathway built around pre-designed, stick-built ADU kit options.

These are not modular homes or factory-built boxes. They are conventional stick-built homes assembled on site by licensed builder partners, with major framing materials pre-cut, drilled, labeled, and packaged before arriving at the jobsite.

The value is not just the kit itself. The value is reducing unnecessary variation early in the process.

By focusing on defined ADU sizes, styles, and limited floor plan changes, Trail Guide helps homeowners make fewer, clearer decisions – and helps builders evaluate projects from a more consistent starting point.

From ADU idea to builder-ready plan.

1. Start with your goal
We begin by understanding what you need the ADU to do: rental income, family housing, aging in place, guest space, or flexible room for the future.

2. Check early feasibility
We look at your property, likely constraints, site questions, utility considerations, and whether a standardized ADU pathway may be a fit.

3. Choose an ADU pathway
We help you compare pre-designed, stick-built ADU options and narrow toward a kit size, style, and layout that fits your goal, property, and budget.

4. Build a planning budget
We help you understand the full cost picture, including the ADU structure, site work, foundation, utilities, finishes, soft costs, and contingency. Where possible, we use conservative planning assumptions to help you understand the likely high end of your costs before a builder prepares formal pricing.

5. Prepare for builder handoff
When the project is ready, we organize your goals, selected ADU pathway, property notes, planning budget, known risks, finish expectations, and open questions so a builder partner can evaluate the project more efficiently.

6. Move forward with a builder partner
A licensed builder partner provides formal pricing, construction contract, permitting support, and build execution. Trail Guide can remain involved as a planning and coordination resource where helpful.

Built around the reason you need the space.

Trail Guide is designed for homeowners exploring an ADU for a specific purpose:

  • Creating long-term rental income
  • Making room for an aging parent
  • Planning for aging in place
  • Supporting an adult child or family member
  • Adding guest space, office space, or flexible room for the future

If you want a fully custom backyard home with unlimited design options, Trail Guide may not be the right fit.

If you want a clearer, more cost-conscious path to an ADU that serves a real-life need, we can help you understand what is possible and what needs to happen next.

Ways Trail Guide Can Help

Start small. Keep moving forward.

Trail Guide is designed as a staged process, so your early planning investment keeps working toward the goal of a clearer, more buildable ADU project.


The goal: every step should reduce uncertainty, support cost-effective decisions, and move your project closer to a realistic, builder-ready scope.

Discovery Call (Free)

A short introductory conversation to understand your goals, property, timeline, budget awareness, and whether Trail Guide may be a good fit.

ADU Feasibility Snapshot

An early planning review to help you understand property considerations, likely constraints, major cost categories, financing readiness, and next steps before spending heavily on design or construction planning.


For projects that move forward with a Project Readiness Package, your Feasibility Snapshot fee is credited toward that next step.

ADU Project Readiness Package

A deeper planning package to help you select an ADU pathway, organize project assumptions, develop a planning budget, identify risks, clarify finish expectations, and prepare for builder review.


For projects that move forward to a build contract with a participating builder partner, this cost is credited toward the final build contract.

Optional Coordination Support

For qualified projects, Trail Guide may remain involved as a planning and coordination resource during partner conversations, permitting preparation, or construction planning.

Thinking about an ADU? Start here.

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Property Address
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What size ADU are you considering?
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The costs to build an ADU can be opaque. Do you have an expected budget range in mind?
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Do you know how you would finance an ADU?
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Are you open to choosing from a curated set of pre-designed ADU options rather than starting with a fully custom design?
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