The Age-in-Place ADU Guide

Designing an ADU for an aging parent

Design a home around the life your parent wants to keep, build it so it holds up as needs change, and pay no more than it should cost.

We’ve built dozens of ADUs for every application. This guide is our team’s compilation of thousands of hours of ADU design and building — everything we know about building for an aging parent: how to plan it, design it, and build it right.

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ADU built for aging parents: an open, single-level kitchen and living room filled with daylightADU built for aging parents

Who this guide is for

  • You want a parent close by, with their own front door and their independence intact.
  • You are weighing an ADU against assisted living, a move, or everyone living under one roof.
  • You want to get the details right the first time — before walls go up, when they cost the least.

What’s inside

In the order a builder would walk you through it.

  1. Is an ADU the right move?

    An honest look at the alternatives, and a calculator that puts a one-time build against years of senior-living costs.

  2. Designing for the life you want to keep

    The three questions we ask every family, a life-first worksheet, and a priority picker that shapes your plan.

  3. Room-by-room specs

    The entrance, kitchen, bathroom and bedroom — the construction details that decide whether someone thrives there.

  4. Size, utilities and lifestyle

    How much space you really need, and the septic and electrical questions that quietly make or break a budget.

  5. How the two homes work together

    Privacy, entrances, fencing, shared or separate utilities — with a decision helper for your property.

  6. Building right without overpaying

    Where to spend, where to save, and the nearly free choices that transform a small home.

  7. What building actually looks like

    All fourteen stages from feasibility to move-in, with realistic timeframes.

  8. Choosing a builder and paying for it

    The questions to ask before you sign, the common financing paths, and a payment estimator.

  9. Three real homes

    Families who built for this — what they wanted, what we built, and what it did for them.

  10. Your spec checklist and ADU brief

    Everything you marked, assembled into one printable page for your builder.

Sample pages

Built to be used, not just read.

ADU vs. senior living calculator

Enter your real figures and see the difference over the years you expect to need care.

The ADU versus senior living cost calculator from the guide

Your priorities

Tap what matters most. It carries straight into your brief.

The priority picker from the guide, with several priorities selected

Your builder-ready brief

Your answers, assembled into one page any builder will understand.

A completed one-page ADU brief generated by the guide
From one of our builds

Neighbors by design

One couple sold their home and built a 700 SF one-bedroom ADU on their daughter’s property instead of buying a larger house to age in. They left the wasted space behind — and kept the family next door.

LargerHer new kitchen and living room, compared with the full-size home she left

Names and details are withheld for privacy. The full story is in the guide.

Common questions

About this guide

Is this guide specific to my city?

The design, construction and cost guidance applies anywhere. Zoning and permitting vary by city, so the guide shows you exactly which questions to ask your local building department and your builder.

Do I still need a builder or architect?

Yes. The guide doesn’t replace construction plans — it makes sure the plans are right. You finish with a one-page brief that tells any builder exactly what you want and which details are non-negotiable.

My parent doesn’t need care yet. Is this still the right guide?

Yes — this guide is built for exactly that. It shows how to design for independence today and build in the details that matter later, while they cost the least. If care is needed now, the In-Home Care guide goes deeper.

How do I get the guide?

Right after checkout you get access to the guide in your web browser — on a computer, tablet or phone. Your answers in the calculators and worksheets save on your device as you go, and your brief prints or saves as a PDF.

What if it isn’t helpful?

If the guide doesn’t leave you with a clearer, more confident plan, reply to your guide email within 30 days for a full refund. You keep everything.