An as-built survey maps what you actually built, exactly where it ended up. You just poured a pool or wrapped a room addition. The plans said one thing. The finished work may sit a few inches off. This survey records the real result on paper, so the city, your lender, and a future buyer can all trust where things stand. Skip it and your project may never fully close out.

How an As-Built Survey Documents the Finished Project

An as-built survey is done after the work is finished. A licensed surveyor measures the new pool or addition and marks its true position on your lot. This step is an important part of the construction survey process, documenting the completed improvements exactly as they were built. The drawing shows the final build, not the plan you started with. If the crew shifted a wall or the pool landed a foot to the left, the as-built catches it.

What shows up on the drawing

The survey turns your finished project into a clear, measured record. Here is what a good one puts in front of you. Read each item as a check on whether your build matches what the city approved.

The real footprint, not the planned one

Crews build to the plan, but sites push back. A tree, a rock, or a small error can move the final build. The as-built shows where the pool shell or addition truly sits. You see the actual shape and size, down to the inch.

Distance to every property line

This is the part that keeps developers up at night. The survey lists how far the new work sits from each line and each setback. If the addition crowds a setback, you find out now. That number decides whether the city signs off or sends you back.

A few inches can matter here. Say your setback is 7.5 feet and the finished wall sits at 7.2. That small gap can fail inspection. The as-built puts the real measurement on record, so you deal with it while the fix is still cheap. Waiting until a buyer’s survey catches it costs far more.

Anything that crept into an easement

Pools and additions have a habit of drifting toward buried lines and drainage paths. The as-built flags any part that sits inside an easement. A pool deck over a utility easement can force a tear-out later. Better to see it on the drawing than to learn it from a utility crew.

Elevations and how water moves

The survey records the height of the pool deck, the slab, and the ground around them. Those numbers show how rain will drain. A deck that sits too low sends water toward the house. In flood-prone areas, the elevation also matters for insurance and permits.

Where the equipment and utilities landed

Pool pumps, drains, and new service lines all show up. The drawing marks where each one sits. That record helps the next contractor, the inspector, and the buyer’s team know what runs where.

Why the paperwork wants it

An as-built is not busywork. Several people ask for it before your project counts as done.

• The city or county often wants one to close the permit and pass final inspection
• A lender or title company may require it before a sale or refinance
• Your insurer uses the elevation data to set flood coverage
• An HOA may check it to confirm the build followed the rules
• A future buyer’s attorney will look for it during due diligence

Without this drawing, a finished pool can sit in limbo. The concrete is cured, but the file stays open. That open file can block a sale, a refinance, or your next permit down the road.

How it differs from the survey you got before building

You likely ordered a survey before the pour. That earlier one showed the empty lot and where the pool was supposed to go. The as-built does the opposite job. It records what got built after the fact. One plans the work. The other proves it.

It is also not a boundary survey and not a topographic survey. Those answer different questions. The as-built has one focus: the finished structure and its exact place on your land.

When to order it

Book the as-built once the pool or addition is complete but before you ask for final sign-off. Order it too early and the survey misses last-minute changes. Order it too late and a stalled permit holds up your closing or your next phase. On a pool, wait until the shell, deck, and equipment are set. Then call the surveyor.

One tip: line up your surveyor before you finish the build, not after. Good firms book out days or weeks ahead. If you wait until the inspector asks for the drawing, you may sit and wait while the crew moves on to other jobs. A quick call early keeps your closeout on track.

What it all comes down to

An as-built survey is the record that turns “we built it” into “here is proof.” It shows the true footprint, the setback distances, any easement trouble, and how water will run. For developers, that drawing clears permits, satisfies lenders, and protects the resale. Finish the build, then finish the file.

Frequently Asked Questions

Do I need an as-built survey after installing a backyard pool?

In many cases, yes. Local building departments often require an as-built survey before issuing final approval or closing a pool permit. Requirements vary by jurisdiction, so it’s best to verify them with your local permitting office.

How much does an as-built survey cost?

The cost depends on the property’s size, the type of improvement, and the level of detail required. Simple residential projects generally cost less than larger or more complex construction projects.

How long does an as-built survey take to complete?

Most residential field surveys can be completed within a few hours, with the finished survey drawing typically delivered within a few business days. Scheduling may vary depending on surveyor availability.

Can an older property survey replace an as-built survey?

No. An existing property survey reflects conditions before construction. An as-built survey documents the completed improvements and verifies their final location on the property after construction is finished.

Who is responsible for ordering an as-built survey?

The property owner is ultimately responsible for ensuring an as-built survey is completed when required. Some contractors include this service in their project scope, but it should be confirmed before construction is complete.