OIBT inspection in Kölliken
Received an inspection notice from EWK Energie AG for a building in Kölliken (Aargau)? OIBT pro calculates your price online, books an ESTI-licensed inspector and sends the safety report to your grid operator.
Grid operator in Kölliken
According to ElCom, the municipality's electricity grid is operated by EWK Energie AG, which sends the periodic inspection notice and receives the safety report.
The building stock of Kölliken
Kölliken has 5'106 inhabitants (FSO, 2024). The federal census counts 1'011 residential buildings there: 715 single-family houses and 151 multi-family buildings. 72 % were built before 1981 and 371 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 | 715 |
| Multi-family buildings | 151 |
| Mixed-use buildings | 145 |
| Share built before 1981 | 72 % |
Sources: FSO, population statistics (STATPOP) and federal building census (structure by construction period).
Frequently asked questions
Who sends the inspection notice in Kölliken?
In Kölliken, the periodic inspection notice is sent by EWK Energie AG. 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 Kölliken?
Our inspectors cover Kölliken and the whole canton of Aargau. You pick a slot online, usually within 2 to 3 weeks; “optimal” slots (inspector already in the area) are cheaper.
Which buildings in Kölliken are subject to periodic inspection?
Every building connected to the grid: in Kölliken, the federal census counts 1011 residential buildings (715 houses, 151 multi-family buildings), 72 % 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 448incl. VAT |
| Apartment | CHF 285incl. VAT |
| Apartment building | CHF 1323incl. VAT |
| Shop, office, restaurant, workshop | CHF 456incl. VAT |
| Farm | CHF 937incl. VAT |
| Industry, crafts, healthcare | CHF 937incl. VAT |