Does insurance cover for extended area without permit?

[Peter Sik]

I want to ask does property insurance will accept for extended property without permit.

That residential property is in Los Angeles city, it has 2 buildings in a lot. Each building has extended about 100 square feet for creating a laundry room. The property is close to 100 years old and is in rent control area. Paying in full cash so no loan inspector required.

Thanks in advance.