Sources
We don't just claim figures – we back them up. Here you'll find all the laws, studies, and expert sources behind our guides and our management-switch guide, openly linked and verifiable. And where a source is weaker, we say so too.
How We Research
We verify every core statement against multiple independent sources. Disputed figures and legal questions are additionally cross-checked in an independent, adversarial fact-check round. Legal information is based on primary sources – statutory text (Fedlex, Swiss Civil Code) and Federal Supreme Court rulings.
All sources last accessed on July 8, 2026.
Owner Portal & Digital Transparency
Blog: "Owner Portal: How to Tell a Good One"
Sources in this group accessed on August 5, 2026.
- Fedlex – CO Art. 400 (agent's duty to render account and hand over)
- Fedlex – Data Protection Act FADP (Art. 25, right of access)
- FDPIC – The right of access
- HSLU real estate blog – Digitalisation in property management; cites the pom+ Digital Real Estate Survey 2024 (15 % at an advanced stage of digitalisation; 429 active PropTechs, Swiss PropTech Report 2024)
- SIX – ISO 20022 in Swiss payment traffic (bank files, incoming payments)
- SVIT/HEV – Management contract 2019 (standard catalogue of services, reporting)
Cost of Property Management
Blog: "What Does Property Management Cost in Bern, Thun & Interlaken?"
- gryps.ch – Kosten Immobilienverwaltung
- cash.ch – Immobilien verwalten lassen: was es kostet
- hausinfo.ch (HEV) – Liegenschaftsverwalter finden
- Fairwalter – Liegenschaftsverwaltung: Kosten-Überblick
- Eidg. Steuerverwaltung – MWST-Sätze (Normalsatz 8,1 %)
- pruefenlassen.ch – Verwaltungshonorar bei Nebenkosten (Art. 4 VMWG)
- weka.ch – Verwaltungskosten in der Nebenkostenabrechnung
- SVIT Schweiz – «Pauschal bleibt pauschal»
- Fedlex – VMWG (Verordnung über die Miete, Art. 4/5)
Fixed Fee vs. Percentage Model
Blog: "Fixed Fee or Percentage Model – Which Is Better for Owners?"
Decentralized Work / No Expensive Office
- Bitkom – «Anruf statt App»: Kontakt zur Hausverwaltung (82 % Telefon)
- Bloom et al. 2015 (Stanford/Ctrip) – «Does Working from Home Work?»
- Stanford Report 2024 – «Hybrid work is a win-win-win»
- SVIT Schweiz – «Homeoffice in der Arbeitswelt etabliert» (Immo-Barometer 2025)
- Coworking Effinger Bern – Abo-Preise
- homegate.ch – Büroflächen Bern (Marktmieten)
- connectics.ch – IT-Infrastrukturkosten für KMU 2026
- HSLU-Immobilienblog – Digitalisierung in der Immobilienbewirtschaftung
- YouGov – Consumer Bank Ranking Schweiz 2024 (neon)
Choosing & Switching Property Management (Rental and Condominium)
Guide (PDF): "Finding the right property management" – switching & first appointment
Blog: "Switching Property Management: When It Makes Sense and How It Works"
Blog: "Switching Management for a Condominium Association (STWEG)"
- Bundesgericht 4A_284/2013 (13.02.2014) – Verwaltungsvertrag = Auftrag, Art. 404 OR zwingend
- Fedlex – Obligationenrecht (Art. 394 ff., 400, 404, 257e)
- ZGB Art. 712q / 712r – Beschlüsse & Abberufung der STWEG-Verwaltung
- Universität Luzern (Frischkopf) – Abberufung des Verwalters im Stockwerkeigentum
- Peter Gauch – Art. 404 OR: Inhalt & zwingender Charakter
- bnlawyers.ch – Liegenschaftenverwaltungsvertrag: jederzeitige Widerrufbarkeit
- Walder Wyss – Die zwingende Anwendung von Art. 404 OR
- law.ch LAWINFO – Liegenschaftenverwaltungsvertrag: Beendigung
- weka.ch – Kündigung zur Unzeit (pauschalisierter Schadenersatz)
- adimmo.ch – Stockwerkeigentum: Verwaltung wechseln
- schmid.lu – Mehrheitserfordernisse im Stockwerkeigentum
- swissroof.ch – FAQ: Abberufung/Kündigung der STWEG-Verwaltung
- SVIT Schweiz – Beschlussvollzug im STWE (Aktenherausgabe)
- swissblawg.ch – Kommentar zu BGer 4A_284/2013
- verwaltungswechsel.ch – Prozessbegleitung & Checklisten
- BWO – Statistik der Schlichtungsverfahren
- SVIT Schweiz – Immo-Barometer 2025
Zollikofen Real Estate Market
Blog: "Zollikofen Real Estate Market: Growth, Housing and the Klee Quarter"
Sources in this group accessed on July 30, 2026.
- Gemeinde Zollikofen – «Zollikofen in Zahlen» (population)
- Raiffeisen – Gemeindeinfo Zollikofen (vacancy rate, modelled net rent)
- Kanton Bern / BFS – vacancy count as of 1 June 2025
- RealAdvisor – asking rents, postcode 3052 Zollikofen
- GWJ Architektur – Kreuzstrasse Zollikofen («Klee», floor area SIA 416)
- Klee Zollikofen – project website (apartments & commercial space)
- Stadt Bern – Viererfeld/Mittelfeld: stakeholders & schedule
- Kanton Bern – press release Guisanplatz (utilities, tram tracks until 2027)
- Stadt Bern – BUGAW: city council upholds its appeal (April 2026)
Ostermundigen Real Estate Market
Blog: "The Ostermundigen Real Estate Market: Housing, Densification and Tram Planning"
Sources in this group accessed on July 30, 2026.
- Gemeinde Ostermundigen – Statistikzahlen (population as of 31.12.2025)
- Raiffeisen – Gemeindeinfo Ostermundigen (vacancy rate, modelled net rent)
- Kanton Bern / BFS – vacancy count as of 1 June 2025
- RealAdvisor – asking rents, postcode 3072 Ostermundigen
- O’mundo – press release on public participation (planning horizon 2040)
- O’mundo – questions & answers (Bern–Ostermundigen tram, completion from 2032)
- O’mundo – documents (status: cantonal pre-assessment)
- Halter AG – Zentrum Bären / BäreTower (32 floors, 152 apartments)
Notice Periods and Termination Dates (Rental)
Utility Cost Statement
Blog: "Checking Your Utility Cost Statement: The Most Common Errors and How to Spot Them"
Checking a Rent Increase
Blog: "Received a Rent Increase – Valid or Not? The Step-by-Step Check"
Belp Real Estate Market
Thun Real Estate Market
Blog: "Thun Real Estate Market: Housing Shortage, Bostudenzelg and Growth"
Renovation Fund in Condominium Ownership
Blog: "Renovation Fund for Condominium Ownership: How Much Is Enough?"
Less Well Substantiated – For Orientation Only
Honesty is part of transparency: we use this information cautiously, or not at all, as hard evidence.
- Mieterverband / SRF Kassensturz – «rund die Hälfte der Nebenkostenabrechnungen fehlerhaft» A frequently cited industry figure without a dated original study – we use it cautiously, attributed as "according to the Tenants' Association / Kassensturz."
- CUREM / Universität Zürich (2013) – fehlender Aufwands-/Qualitätsanreiz beim Prozentmodell Cited as evidence in our fixed-fee article; the exact source reference will be added later.
- WEKO-Beanstandung (1998) – Rückzug der SVIT-Honorarrichtlinien Substantiated in substance; we are still verifying the exact RPW (competition law gazette) reference.
- RealAdvisor – regionale Mietpreise Advertised asking rents (not existing-lease rents) and at times volatile – used only as a rough guide, labeled accordingly.
- NZZ – «Der Frust der Mieter steigt» (07.01.2025) Media report; full text behind a paywall.
Missing a source, or know a better one? Write to us: office@resonus-immobilien.ch.