Not sure if anyone will be able to help here.

We are renting a space in an office building which is currently just an empty shell - I.e. there is absolutely no internal drywalling in the 800m2 odd space.

Of the 800m2 we are renting around half so the space will have to be divided between us and another tenant using drywalling etc. In our lease contract we have a tenant allowance to fit our office space out, i.e. a certain portion of our rent over the lease term will be paid back to us against the cost of installing flooring, lighting, fixtures and fittings etc.

The Landlord is claiming that the cost of the exterior office walling (the walling partitioning our space from the other tenants) is for our cost. Is this correct? I would have thought that the Landlord is responsible for erecting at least the boundary interior walling but there is nothing in our lease specifically around this and I have no experience in this area.

Not sure how clear I am above with all this.