Does the property have the right to designate fire subcontracting?

If the office space is not large, the construction Committee is generally beyond its reach and will not intervene.

If the office belongs to independent property rights, you are fully qualified to decide related matters by yourself and ask the property to cooperate. Property is just your service unit.

If it is leased, it should be coordinated by the lessor, otherwise the lease is invalid or partially invalid. You can terminate the contract and demand compensation from the lessor.

Generally, it is the most economical for the original fire control construction unit to undertake the transformation of some fire control facilities, and the quotation level should also be based. If there is evidence that its quotation is indeed much higher (refer to the official project cost), there is every reason to hire other construction units (but the possibility of lower quotation is very small, and there will be a lot of coordination and preliminary investigation expenses).

Decoration projects generally do not have "general contracting", so there is no so-called "subcontracting". You are contracting two professional projects in parallel: decoration professional contracting and fire fighting facilities professional contracting. It's up to you to determine the organizer.

Because you don't recognize the property as the designated construction unit of fire control facilities, so the other party doesn't provide the corresponding information, I'm afraid it's logical that you can't go through the fire control procedures.

In addition: those whose area is less than 300 square meters or whose engineering quantity is less than 300,000 square meters (reduced to 200 square meters in some provinces) may not go through the relevant fire control procedures, and can construct on their own without affecting the function of the original building fire control facilities.