Integrate Swiss property data directly into your processes. Grundheim B2B delivers all market data from our platform via REST API: mortgage rates from 30+ banks, tax multiplier for all 2'122 municipalities, property prices by district and canton, noise maps, public transport classes and cantonal GIS data. Updated daily, hosted in Switzerland, with a documented OpenAPI schema and OAuth2 authentication.
Daily updated mortgage rates from 30+ Swiss providers (cantonal banks, insurers, online brokers). Tax multiplier for all 2'122 municipalities. Property prices by district, canton and municipality (single-family homes, condominium ownership, rents). Noise exposure (road, rail, air) on a hectare grid. Public transport quality class per address. Demographic data (population, median age, commuter share).
REST API with JSON responses, OAuth2 or API token authentication, documented OpenAPI schema. Endpoints for individual queries (one address, one municipality) and batch queries (all municipalities in a canton). Rate limits can be negotiated individually. Sandbox access before contract signature. Code examples for Node.js, Python and PHP in the developer portal.
Insurers integrate risk data (noise, flooding, contaminated sites) for underwriting decisions. Mortgage brokers show their customers location assessments directly during the advisory meeting. CRM systems enrich leads with address data. Estate agent portals offer white-label location profiles, valuation widgets and comparison tools — faster than building in-house and with local data.
All data comes from official Swiss sources — Federal Tax Administration (FTA), Federal Statistical Office (FSO), Federal Office for Spatial Development (ARE), Federal Office for the Environment (FOEN) and cantonal GIS portals. We scrape mortgage rates daily from the official bank websites. Tax multipliers are updated annually after publication of the cantonal notices. The provenance and status of each data point are available in the API.
All data is hosted in Switzerland (Azure West Europe via Swiss data centre, Microsoft compliance: ISO 27001, ISO 27018, SOC 2). Data protection in accordance with revDSG and GDPR. No personal data — we provide exclusively publicly available market statistics. SLA for standard packages: 99.9% uptime. We provide SOC 2 reports and data processing agreements on request.
Three packages: Starter (for individual applications, from CHF 290/month), Business (with extended endpoints, volume discounts, from CHF 990/month) and Enterprise (with white-label options, dedicated technical support and bespoke SLA). Annual contracts receive a 15 % discount. Usage-based models (per API call from 0.10 Rappen) are also possible. Onboarding included — we migrate your existing data fields, review latency requirements and provide sandbox access within 48 hours. Write to us for a no-obligation demo — we will get back to you within 24 hours with a concrete proposal.