Each as-built survey process will vary according to the nature of the project and how many surveys are required during the course of construction. It is important to understand the type of as-built survey being required and at what phase(s) of the construction sequence they should be performed. This is information is key to maintain project scheduling and compliance with the reviewing agencies. A few examples follow:
Foundation As-built – performed after the foundation is built, but before framing has begun, to demonstrate zoning setback compliance and/or foundation wall height, especially important for properties in flood hazard areas.
Final As-built – performed at the end of a project after final grading, walks, decks, steps and driveways are complete. This is often used to obtain the Certificate of Occupancy (CO) and may be used by the lender to convert a construction loan into a traditional mortgage.
Some of the personnel that may order an as-built survey include:
- Insurance Companies
- Municipal Engineers
- Construction Officials