OIBT inspection in Winterthur
Received an inspection notice from Stadtwerk Winterthur for a building in Winterthur (Zurich)? OIBT pro calculates your price online, books an ESTI-licensed inspector and sends the safety report to your grid operator.
Grid operator in Winterthur
According to ElCom, the municipality's electricity grid is operated by Stadtwerk Winterthur, which sends the periodic inspection notice and receives the safety report.
The building stock of Winterthur
Winterthur has 120'376 inhabitants (FSO, 2024). The federal census counts 14'363 residential buildings there: 7'369 single-family houses and 4'953 multi-family buildings. 80 % were built before 1981 and 6'903 before 1946: these installations have already been through at least one 20-year periodic inspection cycle, and the grid operator's next notice comes due regularly.
| Single-family houses | 7369 |
| Multi-family buildings | 4953 |
| Mixed-use buildings | 2041 |
| Share built before 1981 | 80 % |
Sources: FSO, population statistics (STATPOP) and federal building census (structure by construction period).
Prices for the canton of Zurich (+12 % compared with the national grid).
Frequently asked questions
Who sends the inspection notice in Winterthur?
In Winterthur, the periodic inspection notice is sent by Stadtwerk Winterthur. It states the reference, the installation and the deadline. Photograph the letter in the assistant: we read these details automatically.
How soon can an inspection take place in Winterthur?
Our inspectors cover Winterthur and the whole canton of Zurich. You pick a slot online, usually within 2 to 3 weeks; “optimal” slots (inspector already in the area) are cheaper.
Which buildings in Winterthur are subject to periodic inspection?
Every building connected to the grid: in Winterthur, the federal census counts 14363 residential buildings (7369 houses, 4953 multi-family buildings), 80 % of them built before 1981. A dwelling is inspected every 20 years, business premises every 10 years (5 years for high-risk premises).
What is a periodic OIBT inspection?
The Swiss Low-Voltage Installations Ordinance (OIBT/NIV) requires owners to have their electrical installations inspected at regular intervals (20 years for housing, 10 or 5 years for commercial premises). The grid operator sends a notice; you appoint an independent inspection body which issues the safety certificate.
OIBT inspection pricing
| Detached house | CHF 501incl. VAT |
| Apartment | CHF 320incl. VAT |
| Apartment building | CHF 1482incl. VAT |
| Shop, office, restaurant, workshop | CHF 510incl. VAT |
| Farm | CHF 1050incl. VAT |
| Industry, crafts, healthcare | CHF 1050incl. VAT |