Building A-du: Part Six

Picture coming home and going through the mail.

Most of it's the usual: a couple of bills, a flyer for a roofer, a menu from a place that opened down the street. And then there's a postcard, addressed simply to "Property Owner," and it's about the ADU. The one in your backyard. The one you just finished, that you haven't told anyone about yet, that you've been staring at on weekends wondering what on earth you're supposed to do now that it's actually built. The card says there's already a listing for it, waiting, and there's a little QR code to claim it.

A small, slightly uncanny feeling: somebody saw. Somebody knew you finished, and instead of cold-calling you or filling your inbox with spam, they mailed you a card and offered to help.

This is the sixth post in my series on building A-du, the ADU platform I started, and it's about that postcard, and the genuine care it took to send it in a way that feels like a kindness instead of a creep. The first posts in this series were about what happens once you're using A-du. This one is about how we reach the people who don't know we exist yet, the people who could use us most.

Here's the thing almost nobody realizes. When you finish an ADU in the City of Los Angeles, the city publishes it. The address, the permit number, a useful slice of property data, all of it becomes public record. It's been sitting right there, out in the open. What nobody had bothered to do, before A-du, was take that public information and actually do something useful with it for the person living at that address.

Because that person usually has a problem. The ADU owners I've talked to tend to finish the build and then just... stall. They have a brand-new rental unit and no idea what comes next. They've never written a lease. They're not sure how to screen a tenant without getting it wrong. So they post on Craigslist or Facebook Marketplace, stumble through that first awkward conversation with a stranger, and either get lucky or don't. Meanwhile, sitting right here, is the entire platform built for exactly their situation, the identity-verified renters, the fair screening, the e-signed lease, the rent collection. The only gap is letting them know it was built for them.

How the postcard happens

There are three steps, and we sweated the details on all three.

We listen. Every so often, one of our scrapers politely asks LA's open data portal for completed ADU permits, the ones that have actually been finalized. It pulls the address, the permit number, and the basic facts of the property, then fleshes each one out with parcel data from the County Assessor (square footage, year built, zoning), so the result is a real listing with substance, not a hollow stub. It's careful and unhurried about it, asking slowly and never hammering the source. We're guests in someone else's data, and we act like guests.

We build the listing for you. Each completed ADU becomes a private draft listing on A-du, tied to that address and clearly marked as waiting for its owner. It plainly says it was generated from public permit records and hasn't been claimed yet. We never pretend the owner put it there. That honesty is the whole foundation; the moment we fake it, the kindness curdles.

We mail you a real card. This is the part we took most to heart. We send an actual, physical postcard to the address on the permit, through a service called Lob that turns our request into a real piece of USPS mail. It's addressed to "Property Owner." It doesn't pretend to know anything we couldn't have learned from the public record. And it carries a QR code that leads to a page where you can claim the listing. Scan it, sign in, claim the listing with the single-use code printed on the card, and the listing becomes yours: edit it, set the rent, screen tenants, run the whole thing.

A few of the details I care most about:

• If you don't want mail, you never get it again. Opt out, and we keep a permanent note of it and check that note before any card goes out. The postcards even sit on a deliberate delay before they print, so if you opt out in between, we can reach into the queue and pull yours back before it ever exists. We'd much rather cancel a card than send one to someone who asked us not to.
• The code is the gate. Anyone can type an address into a search box; not just anyone should be able to claim a property. When I first wrote this, the claim flow required identity verification through Stripe before the listing was yours to edit. As of September 2026, it works differently. The link we send carries a single-use claim code, sent to the owner of record by mail or email, and that code is the proof of ownership. Stripe verification proves who someone is, not that they own the property, so for anyone arriving through our link it now comes later, before a tenant can pay rent through the listing. Someone who finds a property by searching for an address, with no code, has to state that they own it, and I review that claim before anything goes live. The postcard is an invitation. The code is the actual gate.
• We tell you where we got your address. Right on the card and in the claim flow, we say plainly that it came from the public permit record. We're not pretending to know more than we do, and opting out is one tap away.

What it means for you

If you're an ADU owner in the City of Los Angeles who finished a build recently, you may get a card from us, or an email. (As of September 2026 we've mailed about 250 postcards, almost all of them in mid-July.) Either one is an offer to take over a listing we've already done the work of building, with identity-verified renters, fair screening, and the rest of the platform waiting on the other side of it. Claiming and listing are free, for anyone, and the first 15 published listings on A-du Rent pay no landlord service fee, locked permanently.

If you're a tenant browsing A-du Rent, you won't see these unclaimed listings. An earlier version of this post said we show them, clearly labeled. That was wrong: they stay private drafts, and a listing appears on A-du Rent, with booking, screening, and the lease flow behind it, only once an owner has claimed and published it.

What I keep coming back to

The lesson here is really a bet: that a piece of paper mail still works, if you're genuinely respectful about it. We send one card, to one specific person, about one specific property, with an honest note about where we got the address and a one-tap way out. I wrote this post before our first mailing, and I owe you the update: as of September 2026, with our first postcards and emails sent, not one permit-seeded listing has been claimed yet. I still think the approach is right, because the postcard isn't trying to be anything other than what it is. No fake "Hi [FIRST NAME]." No invented countdown. No fingerprints from a marketing team that's seen too many growth decks.

The deeper thing is that respect runs in two directions, toward the person and toward the public data we lean on. That open-data portal is a civic good. Abusing it would be both wrong and self-defeating, so we go slow, we only ever touch what's genuinely published, and we leave the source healthier than a careless scraper would. A platform is better off when the wells it draws from stay clean.

And the quiet truth underneath all of it: the postcard only works because everything in the earlier posts already exists. A card to a stranger would be hollow without real identity verification, fair screening, an e-signed lease, and rent collection waiting at the end of it. The reason we can mail someone we've never met and genuinely mean we built something good for you is that we know exactly what they'll find when they arrive, and we know it's worth their time.

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Next time: the very same idea, flipped to the other side of A-du. Not renting out an ADU, but building one, and the pre-approved plan your own city may already be offering that could take months and real money off the job, if only you could find it.