The hidden detail in every Block property

It's a blink-and-you'll-miss-it kind of detail that has been included in every property renovated on The Block since Season 1, but many wouldn't even realise it's there.

To forever link the homes to the show on which they were transformed, the Channel Nine dot logo is installed somewhere in each building.

The special touch can be found on the front steps of the Oslo houses, which were all just sold at auction. Watch the video above to see the dots installed.

In Seasons 1 and 2, filmed in Bondi and Manly respectively, the logo was placed on the front of the building under the eaves.

At the Gatwick, the dots are in the foyer and the ceiling of the lift, while the dots are in the floor of the former Soap Factory at Port Melbourne as you walk in the door.

So if ever you are walking past or are visiting a former Block site, keep an eye out and you might just see a piece of television history.