Legal notice & General Terms and Conditions of Sale
Last updated: 8 September 2026
1. Publisher of the Service
The « Sous-sol Paris » service (hereinafter « the Service ») is published by an independent operator acting on an experimental basis. It is not an official service of the French State, the Ville de Paris, the Inspection Générale des Carrières (IGC, the Paris quarry inspectorate), the BRGM, the Service géologique national or any other public body.
| Publisher | To be completed — surname, first names and address of the publisher (or corporate name, legal form, registered office address and share capital where applicable) |
|---|---|
| Registration | To be completed — SIREN/SIRET number or registration number with the RCS (trade and companies register) if the publisher carries out a declared commercial activity |
| Intra-EU VAT number | To be completed — where applicable, VAT identification number |
| Contact details | To be completed — e-mail address and telephone number |
| Publication director | To be completed — name of the person responsible for publication |
The fields above must be completed before any actual commercial launch. Failure to identify the publisher is punishable under the loi pour la confiance dans l'économie numérique (LCEN, the French law on confidence in the digital economy) and the French Consumer Code.
2. Hosting provider
The site is hosted on the infrastructure of Perplexity AI, Inc., publisher of the pplx.app hosting platform. Payment services are provided by Stripe, acting as an approved third-party payment provider.
| Hosting provider of the site | Perplexity AI, Inc. — to be completed: full address and telephone number of the hosting provider (mandatory under Article 6-3 II of the LCEN) |
|---|---|
| Payment provider | Stripe Payments Europe, Ltd. — approved payment operator (PCI-DSS). Bank card details are never processed by the Service: payment data passes exclusively through Stripe’s secure servers. |
3. Purpose and features of the Service
The Service provides an informative pre-assessment of the risk of ground movement linked to former quarries and underground cavities, compiled from public data. For a given address, it indicates whether that address lies within a known former quarry area (coarse limestone / gypsum), on the basis of public sources (Ville de Paris / IGC, Institut Paris Région, BRGM / Géorisques, DRIEAT, press).
The Service allows the generation of summary reports downloadable in PDF format, for a fee, setting out this information, the recommended steps to take, the warning signs and the sources cited. Three products are offered:
- Subsoil report (former quarries and gypsum) — 5 pages: former quarry area, rock type, network concerned, history of known ground movements, steps to take with the IGC.
- Building-plot report (soil type and clay) — 4 pages: geotechnical soil type, exposure to clay shrink-swell, implications for foundations.
- Both reports — 9 pages in total.
These reports are digital content supplied electronically, with no physical medium.
The essential characteristics, the total price and the conditions of performance are set out in the sections below and presented to the user before the order is confirmed (Articles L. 221-5 and L. 221-7 of the French Consumer Code).
4. Prices and means of payment
Prices are firm, inclusive of all taxes, in euros:
| Subsoil report (former quarries and gypsum) | 15 € incl. VAT |
|---|---|
| Building-plot report (soil type and clay) | €19 incl. tax |
| Both reports | €29 incl. tax |
No surcharge is applied for the use of any means of payment (prohibited under art. L. 112-1 of the French Consumer Code).
The offers aimed at professionals (report packs, subscription) are presented in the pro area. They are in private demo: no professional payment is being collected at this stage. Report credits purchased in a pack carry no expiry date.
Payment is made securely by bank card via Stripe (Visa, Mastercard, Carte bancaire). Payment is required when the order is placed. The debit takes place after confirmation by the card issuer.
The Service does not use algorithmic personalised pricing. No discount or rebate is offered.
5. Order, performance and delivery
The order takes place in three steps: (1) entering the address and displaying the free result; (2) acceptance of these Terms of Sale and of the waiver of the right of withdrawal; (3) redirection to Stripe for secure payment. A detailed summary (address, arrondissement, price) is shown before confirmation. The user may correct their entry at each step.
The order confirmation button bears the wording « Order with obligation to pay », in accordance with Article L. 221-13 of the French Consumer Code. Clicking this button constitutes a firm order and an obligation to pay.
The PDF report is delivered electronically, immediately after payment confirmation, on the thank-you page. Together with the payment receipt sent by Stripe, it constitutes an order confirmation that can be retained on a durable medium (Article L. 221-15 of the French Consumer Code). The Service acknowledges receipt of the order without undue delay. In the event of technical unavailability, the report is notified by e-mail as soon as service is restored.
Time of performance: immediate (automatic generation of the PDF as soon as payment is confirmed). Failing that, and save in the event of unavailability, the Service is performed within 30 days at the latest (Article L. 216-1). In the event of a delay attributable to the Service, the user may request cancellation and a refund, which is made within 14 days (Article L. 216-3).
6. Right of withdrawal
In accordance with Articles L. 221-18 et seq. of the French Consumer Code, the consumer has a period of 14 days in which to exercise their right of withdrawal, without having to give reasons and at no cost.
Applicable exception: under Article L. 221-28, the right of withdrawal does not apply to contracts for the supply of digital content not supplied on a tangible medium where performance has begun after the consumer’s prior express agreement and express waiver of their right of withdrawal. As the report is digital content delivered immediately, the user, by ticking the consent box, expressly consents to immediate performance of the service and waives their right of withdrawal before the report is delivered.
If the user does not wish to waive this right, they must not tick the consent box and must not confirm the order: no performance begins and no payment is taken.
Model withdrawal form
If the right of withdrawal does apply (in particular where prior information was not provided), the user may exercise it by completing and sending the following form:
À l'attention de l'éditeur — [coordonnées à compléter] — Par e-mail : [adresse e-mail à compléter] Je notifie par la présente ma rétractation du contrat portant sur le pré-diagnostic du sous-sol parisien, commandé le [date de la commande], référence de commande : [numéro de session Stripe / n° de commande]. Nom de l'utilisateur : ............................................ Adresse de l'utilisateur : ....................................... Signature (uniquement sur papier) : .............................. Date : ...........................................................
The withdrawal request may be sent by any means (e-mail, post). Where withdrawal is valid, the sums paid are refunded within 14 days (Article L. 221-24-1). In the event of a technical problem preventing the generation or receipt of the report, the payment is refunded in full on simple request.
7. Legal guarantees
As digital content, the Service is subject to the provisions on legal guarantees laid down by the French Consumer Code:
- Legal guarantee of conformity (Articles L. 217-3 et seq.): the Service must conform to its description and have the stated characteristics; in the event of a lack of conformity, the user may request that it be brought into conformity or that the price be reduced.
- Guarantee against hidden defects (Articles 1641 et seq. of the French Civil Code): applicable to defects rendering the Service unfit for its intended use.
The Service is provided « as is », with the limitations described in section 12. No additional commercial warranty is offered beyond the legal guarantees.
8. Mediation and dispute resolution
In accordance with Article L. 612-1 of the French Consumer Code, the consumer may have free recourse to a consumer mediator in the event of a dispute. The contact details of the mediator appointed by the publisher will be shown here before the commercial launch:
| Consumer mediator | To be completed — name and contact details of the competent consumer mediator |
|---|---|
| European ODR platform | ec.europa.eu/consumers/odr — online resolution of consumer disputes |
In the event of a complaint, the user is invited to contact the publisher first (section 15). Failing resolution, they may refer the matter to the mediator or to the competent French courts.
9. Personal data (GDPR)
The Service collects limited personal data, only as necessary to provide the pre-assessment and to process the order. This data protection policy is separate from the Terms of Sale and the Terms of Use.
| Data controller | The publisher of the Service (see section 1) |
|---|---|
| Data collected | Postal address entered (to produce the pre-assessment); e-mail address (collected by Stripe at the time of payment in order to send the receipt, not used by the Service for marketing); Stripe transaction reference |
| Purposes | (1) To geocode the address and generate the report; (2) to process the payment and deliver the report; (3) accounting management and legal obligations |
| Legal basis | Performance of the contract (Article 6(1)(b) GDPR) and legal accounting obligation |
| Recipients and processors | The publisher; Stripe (payment processing, PCI-DSS); Base Adresse Nationale via api-adresse.data.gouv.fr (geocoding); CDNs and technical services: Google Fonts (fonts), unpkg and cdnjs (Leaflet, jsPDF), OpenStreetMap tiles (base maps). Data is neither sold nor transferred to third parties for commercial purposes. |
| Retention period | Address entered: deleted after the report is generated (not retained beyond the session). Order and accounting data: 10 years (legal obligation). Technical logs: 13 months maximum. |
| Transfers outside the EU | Stripe and the CDNs may process data outside the EU as part of their activities, under standard contractual clauses or appropriate safeguards. The Base Adresse Nationale is hosted in France. |
| Data protection officer | To be completed where applicable |
In accordance with the GDPR, the user has rights of access, rectification, erasure, restriction, objection and portability in respect of their data. They may lodge a complaint with the CNIL (cnil.fr). Requests are made by e-mail to the publisher (section 15).
The Service does not collect sensitive personal data (health, religion, political opinions, etc.).
10. Cookies and trackers
The Service uses strictly necessary technical files for its operation (storing the display theme, geocoding session). These trackers do not require consent (Article 82 of the loi Informatique et Libertés, the French Data Protection Act).
The site loads fonts from Google Fonts and base maps from OpenStreetMap/Leaflet, which may set technical cookies. No advertising or profiling cookies are set. The Service carries out no commercial e-mail marketing without prior consent.
The user can manage cookies through their browser settings. Refusing technical cookies may impair the operation of the Service.
11. Intellectual property
The generated report and the elements of the site (texts, layout, logo) are the property of the publisher. The data used comes from public sources that are freely reusable (in particular under the Etalab open licence): arrondissement boundaries fromopendata.paris.fr, Base Adresse Nationale (adresse.data.gouv.fr) for geocoding. The report cites all the sources used.
The trade marks and bodies mentioned (IGC, BRGM, Géorisques, Ville de Paris, etc.) remain the property of their owners and are mentioned for information purposes only.
12. Limitations, liability and sources
The Service is not an official survey. It does not constitute a statutory risk statement (état des risques), a quarry certificate, a geotechnical study (G1/G2), or a property survey within the meaning of the French Construction and Housing Code (in particular Article L. 271-4 — risk statement). It is no substitute for consulting theInspection Générale des Carrières, a certified geotechnical engineering firm, a property surveyor or a notary.
- The cavity data for Paris (75) are not available on the Géorisques portal ; they are held by the IGC (Paris quarry inspectorate). The information presented here comes from open public and summary sources, and does not have cadastral plot accuracy (street/neighbourhood/arrondissement accuracy).
- The Service does not guarantee that the information is complete, accurate or up to date. An address not flagged as at risk may nevertheless conceal an unrecorded cavity.
The publisher cannot be held liable for decisions (purchase, sale, construction, works) taken on the sole basis of the pre-assessment. The publisher’s liability may not exceed the amount actually paid by the user for the report.
Main sources: Ville de Paris / IGC, Géorisques (BRGM), Institut Paris Région, DRIEAT Île-de-France, national press.
13. Changes to the Service and to the Terms of Sale
The publisher reserves the right to change the Service (content, scope, sources) and these Terms of Sale. The applicable Terms of Sale are those in force on the day the order is placed. Changes do not apply retroactively to orders already paid for.
14. Governing law and jurisdiction
These terms are governed by French law. In the event of a dispute, the French courts shall have jurisdiction. The competent court is determined in accordance with the ordinary rules of civil procedure.
15. Contact
For any question, complaint or request to exercise rights (GDPR, withdrawal, refund):
E-mail: [e-mail address to be completed before commercial launch]
Postal address: [to be completed]
Disclaimer. This legal notice and these general terms and conditions of sale constitute a basic template to be completed and validated by a lawyer before any actual commercial launch. The fields marked « to be completed » must be filled in (identification of the publisher, hosting provider, mediator, contact details). Launching a regular commercial activity may require registration (micro-entreprise / SIRET) and membership of a consumer mediation scheme. This document does not constitute legal advice.