What Are As-Built Drawings? How to Capture Them from Your Phone

As-built drawings are one of the most important documents in construction — and one of the least understood. If you've been searching for what they are, why they matter, or how to create them without expensive equipment, this is the complete guide.

What are as-built drawings?

As-built drawings (sometimes called record drawings) are updated construction documents that show what was actually built, as opposed to what was originally designed. During any construction project, changes happen: walls move, pipes get rerouted, dimensions shift. As-builts capture the final, real-world state of a building or structure.

They're the difference between the architect's plans and what the contractor actually put in the ground.

Why do as-built drawings matter?

As-built drawings matter for four main reasons:

• Future renovations — Before any renovation work begins, contractors need to know where existing utilities, structural elements, and systems are located. Accurate as-builts prevent costly surprises when walls come down.
• Owner handover — Owners and facilities managers need accurate documentation of their building to manage maintenance, comply with code, and plan future work. Handing over accurate as-builts is often a contractual requirement.
• Legal and insurance protection — In the event of a dispute, claim, or insurance investigation, as-built records document the condition of a structure at the time of completion.
• Permit compliance — Many jurisdictions require as-built drawings to close permits, particularly for structural, mechanical, and electrical work.

As-built drawings vs. construction drawings: what's the difference?

Construction drawings (also called design drawings or contract drawings) show what was planned. As-built drawings show what was actually built. The gap between the two is almost always significant — field conditions, last-minute changes, substitutions, and RFI resolutions all create differences between the design intent and the finished product.

A set of as-builts without a corresponding set of original drawings isn't complete. But a set of original drawings without updated as-builts becomes increasingly dangerous to rely on as time passes.

What information goes into as-built drawings?

Good as-built documentation typically includes:

• Accurate dimensions of all spaces, walls, and structural elements
• Location of all mechanical, electrical, and plumbing (MEP) systems
• Material specifications and substitutions from the original design
• GPS coordinates and site boundaries where relevant
• Photo documentation tied to specific locations and dates
• 3D models or floor plans showing the final layout

How are as-built drawings traditionally created?

Traditionally, as-builts are created by having a drafter or surveyor revisit a completed site, take manual measurements, and update the original drawings in CAD software. This process is slow, expensive, and often delayed — meaning as-builts get produced weeks or months after project completion, if at all.

For small contractors, the cost of professional as-built services often means they skip them entirely, leaving owners without proper documentation and creating liability risk down the line.

How modern contractors capture as-built records from a phone

In 2026, the most practical way for field contractors to capture as-built records is using a phone-based 3D scanning app. The process has changed significantly in the last few years.

Manifold's Orbit Measure feature lets any contractor walk a space for 60 seconds with their phone, upload the video, and receive a fully measurable 3D model — accurate to within half an inch. The model can be shared with engineers, owners, or architects directly from the app, with no special hardware required and no return visit needed.

For contractors who need floor plans specifically, Manifold's Floor Plan Scan uses Apple's RoomPlan technology to automatically generate a dimensioned floor plan from an iPhone 12 Pro or newer. It takes under five minutes per room.

What phone do you need for 3D as-built scanning?

It depends on the scanning method:

• Orbit Measure — works on any iOS or Android phone. No LiDAR required. Walk the space, upload the video, receive a 3D model.
• Floor Plan Scan — requires iPhone 12 Pro or newer (which has a LiDAR sensor). Produces an automatic dimensioned floor plan.

For most contractors, Orbit Measure is the practical starting point — it works on whatever phone is already in their pocket.

How accurate are phone-based as-built records?

Orbit Measure produces models accurate to approximately half an inch under normal conditions. For renovation planning, client handover, and dispute documentation, this is more than sufficient. For structural engineering or permitting in jurisdictions requiring survey-grade accuracy, a licensed surveyor may still be required.

That said, a phone-based as-built is vastly better than no as-built — and for the vast majority of residential and light commercial projects, it meets the documentation requirements.

How to share as-built records with clients and engineers

Manifold generates a shareable link for every 3D model and floor plan. Clients, engineers, and architects can view the model in a browser with no app or account required. You can also export dimensioned floor plans as PDFs or share photo documentation tied to GPS coordinates and timestamps.

Getting started with phone-based as-built documentation

Manifold's Photo plan starts at $16/user/month with no seat minimums. The Photo+Scan plan, which includes Orbit Measure and Floor Plan Scan, starts at $24/user/month. There's a free trial with no credit card required.

Start capturing as-built records from your phone — free trial, no credit card or book a 15-minute demo to see it in action.