@Vishal Chowdhary
Use your buyer’s Realtor®. Builders typically have their own contracts and are not there to protect you as a consumer. Your Realtor® is there to protect you.
It’s possible that the builder may say you don’t need or can’t have inspections, their contract may not have the typical ‘escape’ clauses for a low appraisal or other valid concerns (and lose your earnest money deposit if you do terminate), and your Realtor® can hopefully negotiate some extras into the deal for you (appliances, upgrades, credits) and fight for you when things go sideways. Such as delays, rising costs of the build being passed onto you by builder, and any poor workmanship.
Who’s going to be honest with you, your own Realtor® or the builder?
Is that house already built or in the process? If in process, your Realtor® can make sure you get some visits to see how things are coming along at different stages. I’ve had to press hard to get completion and a certificate of occupancy before my client’s rate lock expired and rates were jumping, so they would have lost the ability to buy it, along with the money they had spent on inspections & appraisal.
These are just a few examples of why to have your own representation when buying new construction.