Additions to buildings ‘therein or thereon’, usually considered a part of the building. The landlord’s fixtures and fittings are insured as part of the building but if installed by the tenant they are insured as ‘contents’. In regard to any particular fixtures or fittings it is necessary but not sufficient to ascertain who installed them as fittings installed by a tenant may be become landlord’s fixtures. Pointers include purpose of the addition, the degree of actual attachment to the building and the terms of any lease.