More people are building a smaller, smarter home on family land — or on their own — instead of buying a bigger house to grow old in. We’ve designed and built dozens of them. The Age-in-Place ADU Guide is our team’s compilation of thousands of hours of design and building: everything we know about a home you’ll never have to leave.
ADU built for aging in placeAn ADU is one of the largest checks a family ever writes. Most of what decides whether it works — and what it really costs — is settled in the first conversations, long before construction. That’s exactly where most families have the least information.
We see the same expensive surprises again and again. Every one of them is cheap to prevent early, and costly to fix once walls are up.
$129
for the guide — about 0.09% of a $150,000 build. Avoiding a single change order typically covers it many times over.
Even one step means a ramp later — thousands of dollars, and it rarely looks like it belongs. Graded into the site at design, a step-free entry costs almost nothing.
Swapping it for a curbless, roll-in shower later usually means tearing out the floor. Built right the first time, it simply looks like a handsome modern bathroom.
Grab bars need solid blocking behind the drywall. Added at framing, it costs pennies. Added later, it means opening finished walls.
If the property is on septic, the ADU will most likely need a second system — a major line item that catches families who didn’t ask about it early.
Tapping the main house’s panel only works if it has room to spare. A new utility service is often cleaner and cheaper — but only if it’s planned before design.
An “allowance for tile” or “for cabinets” means the price isn’t real yet. Insist on a fixed price against a defined spec, or learn the true cost after it’s built.
Nine times out of ten, people truly live in five rooms. Every extra square foot is money to build, heat, clean and maintain — for rooms nobody sits in.
Entrances, windows, fencing and utility meters decide privacy now and every future use — including a rental later. Splitting meters after the fact is expensive.
Names and details withheld for privacy.
Instead of buying a $500,000-plus house to age in — and still saving for assisted living — one couple sold their home and built exactly what they use, next door to their daughter’s family. Her new kitchen and living room ended up larger than the ones in the full-size home she left.
Another couple built a spacious ADU on their own property and moved into it — renting the main house to their daughter’s growing family. They listed what they couldn’t live without, what they truly needed, and what they’d always wished for, then built exactly that.
$129
Planning for care too? The In-Home Care guide covers it — or get all three for $199 (save $188).
If the guide doesn’t leave you with a clearer, more confident plan, reply within 30 days for a full refund. You keep everything.
Send the address and a photo or two, and we’ll tell you honestly what the property can likely support — before you spend a dollar on design.
ADU Insights is written by the team behind Origin ADU, a design-build company that builds only ADUs. Our founder, Caleb Blair, and his team have designed and built dozens of them — for aging parents, for in-home care, and for rental income.
Want to start with the free material? Read our guide to ADUs for aging parents, compare the numbers with the free ADU vs. assisted living calculator, or see case studies from our builds.
Every spec in the guide comes from homes that are now lived in. Where a question crosses into medical, legal or financial advice, the guide says so and points you to the right professional.
It’s the best time. The decisions that matter most — the entrance grade, the shower, the utilities, how the two homes relate — are cheapest before anything is drawn. You’ll walk into your first builder meeting knowing exactly what to ask for.
Yes. 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 building department and your builder.
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.
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.
Not ready yet? Join the list for free planning advice.
