Privacy policy

Last updated November 8, 2026

This policy explains what 3Dwelling ("we", "us") collects when you use our 3D walkthroughs, including the public demo and a private walkthrough of your own house, and what we do with it.

What we collect

• Your plans and project details. The plans you send us (floor plans, elevations and similar drawings), your name, your contact details and anything you tell us about the house. Plan sets added to your project, and the floor plans we draw from your 3D model, are kept with the project in private storage, for those with access to see.
• Your house's 3D model. The model we build from your plans: walls, rooms, doors, windows, levels, roofs and their measurements.
• Layouts you save. Each layout's name, the furniture and where it sits, the finishes you choose, a small picture of it, when it was saved, and the 20 versions before the current one.
• Photos you render. The finished photo, the 3D view it was made from, the room it shows, the camera position and the furniture in view.
• Device names. A name for each device, such as "iPhone" or "Mac", shown next to the layouts and photos saved from it. You can change it under ? in the walkthrough.
• Usage records. How many photos each project renders each month and their estimated cost, for billing.
• How the walkthrough is used. What you do in the walkthrough: the views and levels you open, the kinds of rooms you walk into (such as "kitchen" or "bedroom"), when you take the tour, arrange furniture, change the light, save a layout, render or open a photo, or share a link, and roughly how many minutes you spend using it. Each device gets a random ID, kept in your browser's storage, so we can tell one device's visits from another's, and the records say which walkthrough they come from. We also keep recordings of how the page's buttons and panels are used, with every word on the screen and everything typed blanked out. These records never include your plans, your house's or rooms' names, your layouts' names, your photos or your device's name.
• Technical information. Your IP address and browser details reach our servers with every request, as with any website. We use your IP address to limit sign-in attempts, text codes and emails sent, and the number of photos one visitor can render. For that, we store it only in a scrambled one-way form that can't be turned back into the address, and those counts are cleared within about two days. Our hosting provider also keeps standard request logs for a limited time.

Your account

You open a private walkthrough by signing in to your own account. For it we keep:

• Your name and email address, and your password. Our sign-in provider (Supabase) keeps the password only in scrambled form: we never see it. If you sign in with Google, Google shares your name, email address and the address of your profile picture with our sign-in provider. We use the name and email address.
• Your mobile phone number, if your account uses a text code when you sign in. We send the number to Twilio, which texts you each code and checks it, so we never keep the codes themselves. We use your number only for sign-in codes. We don't use it for marketing, and we don't share it with anyone for theirs.
• Who has which project. Before you sign up, we or your builder attach your email address to your project: as one of a builder's or designer's people (with your title, such as "Project manager"), or as a homebuyer. A builder's or designer's company also has its name and logo here. Your account is tied to these when you first sign in with that email address.
• Your sign-ins. For each sign-in: when it started, how (a password, Google or an emailed link), when you were last active, whether you passed your text code, how it ended, your browser's description, and your IP address in a scrambled one-way form that can't be turned back into the address. Your account has one sign-in at a time: signing in somewhere else ends the one before.
• An activity log. Who signed in and out, who opened which 3D model, and what changed about who has which project, its plans, its cabinet builds and its invoices, with the same browser description and scrambled IP address. We use it to keep accounts secure and to answer questions about what happened.
• Billing, for a builder's or designer's company we invoice: the company's name and the email address its invoices go to, and each invoice's amount, what it's for, its due date and whether it's paid. You pay on Stripe's own pages: your card or bank details go to Stripe, not to us. An invoice still unpaid 48 hours after its due date can lock its project's 3D model for that company's people until it's paid.

Our staff can see an account's name, email address, phone number, sign-ins and activity, to support it. They can also see a person's portal as that person sees it, without signing in as them; each time they do, it goes in the activity log.

What stays on your device

On the public demo, your saved layouts, unsaved changes and photos stay in your own browser's storage. We don't receive them, except for the views you send to be rendered (see "Photo rendering" below). Clearing your browser's data for the site removes them.

On a private walkthrough, your browser also remembers a few settings, such as picture quality, the device's name and the level you last viewed.

Cookies

We use only the cookies the walkthrough needs to work:

• Two that keep you signed in. They have no expiry date, so your browser removes them when it closes. Your sign-in also ends after an hour away, after 12 hours in all, when you sign out, or when you sign in somewhere else.
• One that lets this browser open the 3D models you opened from your account. It also ends when your browser closes.
• While you sign in with Google, one that lasts 10 minutes.

We don't use advertising or analytics cookies, and we don't track you across other websites. The records of how the walkthrough is used (see above) keep their random ID in your browser's storage, not in a cookie.

How we use it

• To build your 3D walkthrough from your plans, and to correct it.
• To keep your layouts and photos in step across your devices.
• To create the photos you ask for.
• To keep the service secure and to prevent abuse.
• To bill for the service and to answer your questions.
• To see which parts of the walkthrough people use, and to improve it.

We won't use your plans, your house, your layouts or your photos to promote our business without your written permission.

Photo rendering

When you press Render this view, we send the view you're looking at to fal.ai, an image-generation service, which returns the photo. What's sent is a picture of the 3D view, a line drawing and a depth image of it, and a short description of the room and its furniture. fal.ai processes these under its own terms. On a private walkthrough we keep the result with your project. On the public demo it goes back to your browser.

Plumb, the assistant

On a private walkthrough you can ask Plumb about your house: sizes, rooms, what's where and what things cost. To answer, we send Anthropic, the maker of Claude, a written summary of your house (its levels, rooms, walls, doors and windows), what you've asked and Plumb's earlier answers in that conversation, where you are in the walkthrough, and what Plumb looks up in your open layout (such as its furniture and their prices). Anthropic processes these through its API under its commercial terms: it doesn't train its models on them, and it deletes them within 30 days.

We keep each conversation with Plumb with your project, to improve Plumb: your questions, its answers, what it looked up, which layout was open, the account you were signed in with and the name of your device, and any thumbs up or down and note you leave. Only we read them. They're kept as long as your project, included when you ask for a copy of it, and deleted with it. Our usage records get only that a question was asked or rated, never the words.

If you ask for a layout's moved walls to become part of your house's plans, we keep the request with your project too: the changes, any note you add, your account and the name of your device, and our answer.

Who can see your project

Your private walkthrough, its layouts and its photos can be seen by the accounts that have been given your project (yours, your builder's, and anyone you ask us to add), and by us. If someone shouldn't have it, contact us and we'll take their access away.

Who we share it with

We don't sell or rent your information. We share it only with the services that run the walkthrough for us, and only as much as they need:

• Vercel hosts the website.
• Supabase stores project data and photo files in its database and file storage. It also runs sign-in: it keeps your account's email address, name and scrambled password, and sends the emails that confirm your address and reset your password.
• Twilio texts your sign-in codes and checks them. It receives your mobile phone number.
• Google, only if you choose Continue with Google, signs you in and shares your name, email address and profile picture's address.
• Stripe sends invoices and takes payments for a builder's or designer's company. It receives the company's name, the email address its invoices go to, and what each invoice is for, and it handles card and bank details itself.
• fal.ai creates rendered photos.
• PostHog receives the records of how the walkthrough is used and keeps them for us. It also receives your IP address with them, which it uses to estimate your approximate location, such as your city or country.
• AI assistants, currently Anthropic's Claude, help us turn plans into 3D models and maintain the site, and answer your questions as Plumb.
• GitHub hosts our private code repository, which includes the 3D models we build.
• Google Fonts and Cloudflare's cdnjs deliver fonts and code the page loads. They receive your IP address, as part of loading any web page.

We may also share information if the law requires it, or to protect our rights or someone's safety.

Our services store data in the United States.

How long we keep it

• Your project: while your walkthrough is active, or until you ask us to delete it.
• Deleted layouts and photos: recoverable for 30 days, then permanently removed.
• Earlier versions of a layout: the last 20.
• Conversations with Plumb: as long as your project; Anthropic deletes what it received within 30 days.
• Your plans: the plans you send us stay on our own computers, and the plan sets added to your project stay with it, until you ask us to delete them or your project is deleted.
• Your account: until you ask us to delete it. If your access to a project is taken away, your account stays but no longer opens it.
• Your sign-ins: 30 days from when each one started.
• The activity log: 400 days.
• Invoices: as long as we need them for our accounts and taxes. Stripe keeps its own records of them under its terms.
• Backups: deleted data can remain in our database provider's backups for a short time, about a week, before it's gone.
• Usage records: the monthly count of photos and their cost stay in our records after a project is deleted. They contain no plans, layouts or photos.
• Records of how the walkthrough is used: up to a year. Recordings of the page's buttons and panels, about a month.

Your choices

Contact us to:

• get a copy of your project's layouts, photos and conversations with Plumb;
• correct your information or your house's model;
• delete your project, its photos and your plans;
• take someone's access to your project away;
• see the details we keep for your account, correct them, or change your phone number;
• delete your account;
• delete the records of how your devices used the walkthrough.

To stop a device sending records of how the walkthrough is used, open the walkthrough once with ?analytics=off at the end of its address (for example, …/p/your-house?analytics=off). That device sends none from then on, until you open it with ?analytics=on. A browser set to send a Do Not Track or Global Privacy Control signal sends none at all.

We'll reply within 30 days. These choices are open to everyone, wherever you live. Some states' laws give you additional rights, and we'll honor those too.

Security

The site uses encrypted connections (HTTPS). Passwords are stored only in scrambled form, an account has one sign-in at a time, and a text code at sign-in can be required for any account. Photo files and plans are kept in private storage that's reached only through the walkthrough and your account. No system is perfectly secure. If we learn of a breach affecting your information, we'll tell you as the law requires.

Children

The service is not meant for children under 13, and we don't knowingly collect their information.

Changes to this policy

If we change this policy, we'll post the new version here with a new date. If a change is significant, we'll tell customers with an active project.

Contact

Questions about this policy or your information: contact 3Dwelling, the team that built your walkthrough.