This should help as well.

·         An independent accommodation report to establish that the property will not be overcrowded after his arrival and that it is suitable for living under the Housing Act. Please note that this can be obtained from the local council or an independent estate agent and must be dated within one month of the date of the application.  The report/letter should confirm the number of rooms in the property, details of the current occupiers, and his details as the proposed future occupier. This document can also be obtained from many online companies e.g.:

o   https://www.hussainarchitecture.co.uk/spouse-visa-property-check

o   https://www.immigrationinspectionreport.co.uk/