Property listing with AI: attract buyers without exposing the seller
A flat online for six weeks, not a single viewing, a listing to rewrite. AI can write it in minutes, as long as you don't hand it what the seller told you in confidence.
"The two-bedroom flat on Linden Road has been online for six weeks without a single viewing: rewrite the listing for me." The negotiator opens her viewing notebook. Everything is in there: light from both sides, the original parquet, the cellar, the balcony with room for a table for two. But also the rest: the probate, the children who want a quick sale, the price they would accept to come down to, the flat standing empty since spring, the door code.
AI can turn those notes into a listing that makes people want to book a viewing. You still have to sort what you give it: half of that notebook belongs to the seller, not to the listing.
What a property listing must say, and what it must leave out
The rules depend on the country. Across much of Europe, a sale listing has to show the energy rating from the property's energy performance certificate. In several countries it must also state the agency's fees and which party bears them and, for a flat in a jointly owned building, details such as the number of units and the usual service charges. A rental listing typically shows the rent, the charges and the floor area. Everywhere, a false or misleading description can be penalised: under consumer protection rules in the EU and the United Kingdom, and under the law on unfair competition in Switzerland.
A listing must also leave a great deal out. The mandate entrusts you with the seller's identity, their reasons and their room for negotiation: personal data, protected by the GDPR as well as by the Swiss FADP, and information that costs your client dearly if a buyer finds out.
Before pasting your viewing notes: the checklist
- The seller's name and contact details. The AI has no need for them to describe a two-bedroom flat. They stay in your property management software.
- The reason for the sale. Probate, separation, a job move, money trouble: private information, and a sign of weakness in the negotiation. An AI that reads it may slip it into the text.
- The floor price and the room for negotiation. This is the most confidential information in the mandate. Give only the asking price, fees included, and the share made up by fees.
- The exact address, the precise floor and the codes. The neighbourhood and the tram stop outside are enough for the listing. The street number and the door code have no place in it.
- The empty home and the absences. "Unoccupied since March", "owners living abroad": a useful detail for your viewings, an invitation to a burglar in a listing.
- The sitting tenant. For a property sold with a tenant in place, the rent and the end date of the lease matter to an investor; the tenant's name and circumstances, never.
- The full energy report. The document carries the owner's name and address. Copy out the ratings and the useful figures rather than attaching the whole report.
- Unsorted photos. A family picture in a frame, post on the table, a number plate in the courtyard: set those shots aside before showing them to anyone.
The general list, for every profession: the data you should never paste into an AI.
Reviewing the listing before it goes online
AI writes well, sometimes too well. It may describe a north-facing living room as "bathed in light", round up a floor area or invent a fireplace because the building is old. It can also get a rule wrong, with the same confidence. Check every figure against your file, delete anything you didn't see for yourself at the viewing, and check the mandatory information. For a rental, read the tone again too: "ideal for a young couple" turns applicants away because of their family situation, which anti-discrimination rules forbid in many countries. The listing carries the agency's name; you are the one answerable for it.
Writing property listings with AI, without stepping outside the mandate
Once the checklist is ticked off, what remains is the property: floor areas, materials, aspect, neighbourhood, asking price. In IA Confidential, this information is handled by default by open models installed on servers in Switzerland and Europe, outside the reach of the CLOUD Act, which keep nothing of your conversations. Three families of models, standard confidential, specialised confidential and anonymised, are chosen automatically or by hand; anonymised models are only used if you choose them.
A "Listings" space and the agency's tone
Create a space for your listings, with one conversation per property. In the space's Assistant tab, describe your house style once and for all: length, order of information, banned adjectives, details to repeat at the end of each listing. These instructions take precedence over your general preferences: every listing from the agency keeps the same voice, whichever negotiator writes it.
Here are my notes for a 68 m² two-bedroom flat on the second floor of a 1930s building, in a quiet area close to the tram: east-west living room with windows on both sides, original parquet, refitted kitchen, two bedrooms overlooking the courtyard, 4 m² balcony, cellar, communal heating, energy rating D. Asking price and fees borne by the buyer below. Write a 150-word listing that opens with what you see as you walk in, then a 60-character headline. Do not add any feature I haven't mentioned, do not use "rare" or "must-see", and end with the mandatory information, leaving blank whatever I haven't given you.
On a computer, with Chrome, Edge or Opera, you can also add to the space the folder where you keep your past listings, with the "Confidential models" option: the assistant draws on the ones that worked well, and that folder is never sent to an anonymised model.
Photos, the energy report, and the finished listing
Attachments, whether text, PDF, Word or images, are read in your browser; for a photo, the metadata, including the GPS location, are removed. If you choose an anonymised model, only pseudonymised extracts reach it. The assistant writes the listing as a document: you edit it, you keep the versions, you export it to Word or OpenDocument. The layout is rebuilt on export; to publish, copy the text into your listing software.
The same description can then serve several channels:
Starting from the approved listing above, suggest a 40-word version for the agency's shop window, then three different hooks for a social media post, each built around one selling point: the balcony, the light from both sides, the neighbourhood. Do not change any figure and do not promise anything the listing doesn't already say.
If an anonymised model tempts you
The Confidentiality filter checks your message first. If it detects sensitive data, it offers to answer with a confidential model, message unchanged, or to send an anonymised version, which you review. In the Privacy panel, add your own anonymisation rules: your clients' names, the name of a development that is too easy to recognise. To understand what each option changes, read anonymisation or pseudonymisation.
What stays confidential
With a confidential model, your viewing notes, your photos and the listing are processed on servers in Switzerland and Europe, and nothing is kept on our side: your conversation history stays in your browser. We couldn't hand it over if asked, because we don't have it. A folder added with the "Confidential models" option never goes to an anonymised model.
With an anonymised model, nothing leaves without going through the Confidentiality filter, and you are the one who chooses what leaves: the anonymised version, pseudonymised extracts, or the message as it is, knowing what that means.
One precaution stays in your hands: the front-desk computer is often shared by several negotiators, and the history can be read by anyone using the same browser session. Use a session of your own and sign out when you leave.
For another piece of business writing where the figures have to be right, see our guide to the professional quote.
To rewrite the listing that has been sitting idle for six weeks, starting with made-up notes: open the chat.
