But he thought there would be "a big delay" with fixing the building due to the impact of Covid, such as getting materials.
The company would continue to operate as normal when it opened on Monday, he said.
"It could have been worse. Normally I put a lot of paint in there ... but on Friday I decided to put it somewhere else. It would've been a huge disaster because I've got everyone ready to go to jobs."
Police were informed of the incident just before midnight last night. Photo / Supplied
Renovators Painters and Decorators office manager Trudy Murray said her boss was notified by police this morning after a car "smashed into the building".
She said the car had "taken out the whole front of the side office".
"It was a meeting office so there [were] just tables and chairs in there - nothing major.
"We had to get there before 8 o'clock this morning so we could go and clear out in front of Oil Changers so that they could start work because the debris was spread quite a way.
"The boss and his family and a couple of our workers had to go and pick up all the bricks and damage - it's quite extensive."
Police were informed of the incident just before midnight last night. Photo / Supplied
Oil Changers Rotorua manager Alex Korodi said most of the debris had been cleaned up when he got to work this morning and there was "just little bits of wood and glass" on their driveway which they swept up.