Once construction wraps up, most people are ready to move in and move on. But there is one important step that should happen before you close the books on your project. An as-built survey creates an official record of exactly what was built, where it was placed, and how it connects to everything around it. Without it, small differences between your original plans and the finished build can turn into big problems down the road.

What Is an As-Built Survey?

An as-built survey is a survey done after construction is complete. It records the exact location, size, and position of everything that was built on a property, including the building itself, utility lines, driveways, and other structures. It shows what was actually built, not just what was planned.

When a building is designed, everything on the plans looks perfect. But during construction, small changes often happen. A wall might shift slightly. A utility line might be rerouted. A driveway might be poured a few feet from where it was originally drawn. An as-built survey captures all of those real-world details and creates an official record of the finished project.

This type of survey is also called a record survey or a field survey in some areas, but they all serve the same purpose: documenting what is actually on the ground after construction ends.

How Is an As-Built Survey Different from a Construction Survey?

A construction survey happens before and during building. It marks where things should go. An as-built survey happens after construction is finished. It records where things actually ended up.

These two surveys work together but at different stages of a project. The construction survey guides the crew during the build. The as-built survey creates the final record once the build is done. One looks forward. The other looks back.

What Does an As-Built Survey Include?

An as-built survey records the finished location of all structures, utility lines, and improvements on a property. This includes the building footprint, foundation edges, driveways, walkways, fences, and underground utilities. It also notes any differences between what was originally planned and what was actually built.

A licensed surveyor visits the completed site and measures everything that was put in place during construction. The final document typically shows:

• The exact location and size of the finished building on the lot
• The position of the foundation and all exterior walls
• Driveways, sidewalks, parking areas, and other paved surfaces
• Fences, retaining walls, and other outdoor structures
• The location of utility connections including water, sewer, and gas lines
• Any changes made during construction that differ from the original plan

This document becomes the permanent record of your finished project. It is something you, your lender, and future owners of the property may all need at different points.

Who Needs an As-Built Survey?

Property Owners

Once construction is complete, an as-built survey gives you a clear and accurate record of everything on your property. This is useful if you ever plan to add on to the building, sell the property, or make changes that require a permit.

Local Governments and Permit Offices

Many cities and counties require an as-built survey before they will issue a certificate of occupancy. A certificate of occupancy is the official document that says a building is safe and approved for people to use. Without the as-built survey, this certificate may be delayed or denied.

Lenders and Title Companies

When a construction loan is involved, the lender often requires an as-built survey before releasing the final payment. It confirms that the building was completed as agreed and that it sits correctly on the property.

Architects and Engineers

Designers use as-built surveys when planning future additions or renovations. Knowing exactly where everything was built helps them create accurate plans for the next phase of work without guessing.

Why Do Differences Between the Plan and the Build Matter?

Even small differences between the original plan and what was actually built can cause problems. If a building is placed closer to the property line than the plan called for, it may not meet local setback rules. If a utility line was moved during construction and not recorded, it can be damaged during future digging.

An as-built survey catches these differences early. If something does not match the approved plan, it is better to find out right after construction than years later when it becomes a legal or insurance issue.

According to the American Society of Civil Engineers, undocumented utility locations are one of the leading causes of damage during excavation and underground construction work. An as-built survey helps prevent that by recording exactly where every line was placed.

When Should You Get an As-Built Survey?

The best time to get an as-built survey is as soon as construction is finished and before the site is cleaned up or landscaped. At this point, all the key features are still easy to see and measure. Waiting too long can make the process harder and the results less reliable if landscaping covers utility connections or other important points.

Some projects require the as-built survey before a specific deadline, such as before a final inspection or before a loan can be closed out. It is always a good idea to ask your surveyor, contractor, and local permit office about the right timing for your specific project.

How Much Does an As-Built Survey Cost?

As-built surveys for residential projects typically cost between $400 and $1,200, depending on the size of the property and the complexity of what was built. Larger or more detailed projects cost more. Always ask a licensed land surveyor for a quote based on your specific completed project.

Things that affect the price include:

• Size of the project: A large commercial site has more to measure than a small home.
• Number of structures: More buildings and features mean more time in the field.
• Utility complexity: Properties with many underground lines take longer to document fully.
• Turnaround time: If you need the survey quickly, rush fees may apply.

Who Should Perform an As-Built Survey?

An as-built survey must be done by a licensed professional land surveyor. The finished document carries legal weight. It may be used by government offices, lenders, and future property owners for many years to come. Work from someone without a proper license will not be accepted for official purposes.

Look for a surveyor with experience in post-construction surveys who is familiar with local permit and recording requirements. The right person will deliver a clear, accurate document that meets all the standards needed for your project.

Protect Your Investment with a Complete Record

Building something new is a big investment. An as-built survey makes sure that investment is properly recorded and protected. It gives you, your lender, and your local government a clear picture of exactly what was built, where it sits, and how it connects to the utilities around it.

If your construction project is recently completed or nearing completion, an as-built survey can help document the final layout and confirm that the work matches the approved plans.