In 2015, I hired a Defect Liability Period Inspection Company. The charged was RM1,800 for a single storey bungalow of 1680 sq.ft. This was in 2015. Can negotiate what scope of work your want.

Requirement, after receive the keys from the developer, do not touch or renovate the house. Hire the company and they will make the inspection thoroughly including using special lighting at night to see the quality of the cements used (ratio).

Once pain RM1,800, and inspection finished, they will emailed PDF detail report with photos. Print and submit to the developer.

Once developer completed the repair, can hire them again to re-inspect for a discount.