Re: Private schools
Private schools are not under the ambit of RTI, unless it is substantially financed by appropriate government. If the school is receiving full grant-in-aid, it is a public authority within the meaning of the RTI act and you can file RTI Application addressed to the Public Information Officer of the said school and seek the details of construction of building, its approved plans drawings, inspection certificate by the authority etc.
If it is not receiving full grant-in-aid, you can still file RTI Application with the PIO of DEO and seek such details with respect to the said school, being the regulatory authority of schools in a district.
For further guidance in drafting and filing RTI Applications, please refer to following links >
>> How to Fill RTI Application
>> How to locate Public Information Officer under RTI
>> Sample RTI Applications
Satyameva Jayate सत्यमेव जयते