What Are As Built Drawings? Examples & How to Create

On almost any building project, the original plans rarely survive construction unchanged.

Whether it is a distribution center, a hospital, a factory, or an office tower, unforeseen obstacles, component lead-time changes, and on-the-spot fixes all shift the final layout away from what was first drawn.

By the time the doors open, the official plans and the real building no longer match, and that gap is what as-built drawings exist to close.

What Are As Built Drawings?

As-built drawings are a final set of documents that record a building or site exactly as it was constructed, rather than as it was originally designed. Compiled at project completion, they log where the finished work departs from the original plans, capturing every change made during construction, from exact dimensions to the real locations of materials and systems.

Rather than being drafted all at once at the end, they are built up throughout the job.

Builders mark changes onto the original plans in red as construction proceeds.

From Redlines to CAD/BIM Models

These “redlines” act as markups that are eventually turned into a clean, approved set of drawings using CAD (Computer-Aided Design) or BIM (Building Information Modeling) tools. To capture these changes with absolute precision, a LiDAR scan (Light Detection and Ranging scan) of the completed site can be fed directly into the software to create the 3D digital model.

The latter not only generates highly accurate as-built drawings but also serves as the foundation for a living digital twin of the facility.

For facility executives, as built drawings mean having a verified, definitive baseline of actual physical dimensions, structural columns, utility conduits, and equipment placements from precise field measurements.

Achieving this accuracy is vital across industrial sectors, especially considering that industry surveys reveal only 15% of built-environment professionals report having 100% accurate asset registers.

Why Are As-Built Drawings Important?

As-built drawings are indispensable contractual and operational assets for building owners, facility managers, and their construction teams, from the day a building is handed over through the rest of its life.

Here is where they earn their keep:

Legal and Contractual Proof

They serve as binding proof that general contractors and equipment installers delivered the work to the agreed engineering standards and local building codes.

Fewer Delays and Less Risk

Gaps in the record force teams to work from guesswork, slowing decisions and adding risk at every stage.

In one 2026 survey of BIM and VDC (Virtual Design and Construction) professionals, 65% called the design-to-construction handoff a major source of data friction, and 63% had hit project decision delays from unreliable model data.

Everyday Facility Management

Operations teams use these plans to verify that systems were installed to the functional specifications; they serve as a single source of truth across the rest of the facility’s life.

Modifications and Expansion

Facility engineers check floor loads, clearance heights, and power routing before reconfiguring storage or adding automated handling lines.

Compliance and Safety

Accurate drawings streamline local authority permitting, code inspections, and emergency planning.

Property Transfers

As-builts give a property buyer or new operator a verified record of the building exactly as it stands.

Who Uses As-Built Drawings?

A wide range of stakeholders across the building lifecycle rely on these documents:

Architects and Industrial Engineers: To analyze existing physical conditions before designing facility expansions or automation retrofits.
General Contractors and Subcontractors: To understand installed infrastructure, sequence work correctly, and order accurate material quantities for modifications.
Facility Managers and Operations Teams: To maintain equipment, troubleshoot utility feeds, manage floor loads, and execute routine repairs safely.
EHS and Safety Officers: To verify compliance with fire codes, egress requirements, and structural load standards.
Building Owners and Real Estate Investors: To establish asset valuations, support lease agreements, and provide complete documentation to prospective buyers or tenants.

Who Creates As-Built Drawings?

Creating accurate drawings is a collaborative effort between field crews, specialized surveying professionals, and lead design teams.

Construction Contractors

During active construction, general contractors and trade subcontractors make redline markups on working drawings to log field adjustments as work occurs.

Architects & Engineers

Once construction reaches substantial completion, these redlined plans are submitted to the project architect or engineering team who verify the field notes against approved change orders and submittals, translating the markups into clean digital CAD or BIM files.

As-Built Service Providers

In modern industrial retrofits, specialized as-built drawing services use LiDAR scanning to capture the finished site, turning it into a 3D digital twin and CAD drawings.

Examples of As Built Drawings

Here are several practical examples of how as-built drawings are used across facility management, warehousing, and construction:

Safety & Emergency Response

EHS (Environment, Health, and Safety) officers pinpoint fire sprinkler headers, main gas shutoffs, and emergency egress corridors directly from the drawings during safety audits or emergencies, avoiding guesswork.

Permitting & Regulatory Inspections

Operations managers submit verified dock door openings, fire wall placements, and accessibility clearances to local building departments to close out permits without delays or field re-inspections.

Material Procurement

Procurement teams pull exact square footage and wall dimensions straight from the drawings to order precise quantities of drywall, insulation, or flooring, preventing costly material waste.

Equipment & Utility Upgrades

Maintenance managers review documented electrical panel circuits and conduit runs before installing new charging stations or high-draw machinery, making sure the system will not overload existing breakers.

Leasing & Asset Valuation

Property owners give prospective 3PL warehouse storage tenants certified floor plans, column grid spacing, and slab load-bearing specs to validate usable square footage and finalize lease terms.

Warehouse Reconfiguration

Facility engineers check floor loads, clearance heights, and power routing before changing the warehouse racking layout or installing an ASRS system.

Creating As-Built Drawings

Creating accurate, usable documentation follows a structured, step-by-step methodology:

Step 1: Continuous Field Redlining

Field contractors maintain working drawing sets, marking all deviations in red ink as construction progresses. Every moved pipe, shifted electrical panel, or altered door opening is logged immediately.

Step 2: Reality Capture and Site Surveying

Survey technicians conduct thorough site surveys using 3D laser scanners and LiDAR equipment. These tools capture millions of precise spatial data points across the facility, recording real-world geometry with millimeter-level accuracy.

Step 3: Data Processing and Point Cloud Compilation

Raw laser scan data is processed into a unified 3D point cloud, providing a digital representation of existing facility conditions.

Step 4: CAD Drafting and BIM Modeling

Drafters import point cloud data and field redlines into design platforms like AutoCAD or Revit. The original design files are updated to reflect exact as-built conditions.

Step 5: Quality Assurance and Closeout Approval

Design teams, project managers, and facility owners cross-reference the compiled drawings against change orders, RFIs, and punch-list inspection notes to confirm absolute accuracy before final sign-off.

Looking for As-Built Drawings of Your Facility?

StorX Solutions combines LiDAR scanning, engineer-drafted CAD drawings, a 3D digital twin, and racking design in one service, so a project moves from a measured scan to a build-ready record without ever changing hands.

At StorX, we support teams documenting aging or acquired buildings, planning layout changes, or preparing permit and bid packages for sites where the original drawings have long stopped matching the floor.

Our engineers connect that setup to the detail a real layout needs, keeping scanning, drafting, and storage design inside one team so nothing is lost between the field data and the final drawing set.

Turn missing records into a build-ready as-built set, from the first scan to the final drawing. Schedule a consultation.

FAQs

What’s the difference between as-built and record drawings?

As-built drawings are compiled by contractors during construction to document field changes and actual conditions. Record drawings are the final, official plans prepared or approved by the lead architect or engineer after project completion, incorporating verified contractor redlines for long-term archives.

What if as-built drawings are inaccurate?

Inaccurate as-builts cause design clashes, safety risks, and costly construction rework. They can also lead to severe legal disputes, financial claims, and litigation between building owners, contractors, and design teams. Today, however, thanks to laser/LiDAR scanning technology, inaccuracies are significantly reduced.

What is an as-built?

An as-built drawing (or plan) is a revised final blueprint or digital 3D model that documents a structure exactly as completed. It details all field modifications, exact dimensional changes, material substitutions, and utility shifts made from the original design plans during construction.

How much do as-built drawings cost?

As-built drawings typically cost $0.40 to $3.00 per square foot for standard 2D architectural layouts. Complex mechanical, electrical, and plumbing (MEP) data or 3D Scan-to-BIM modeling can drive prices up to $5.00 to $10.00+ per square foot. For smaller properties, drafting firms may bypass the square-foot metric and charge a flat minimum project fee.

Are as-built drawings required by law?

Legal requirements vary by local jurisdiction and municipality. Many building departments and government agencies mandate updated as-built drawings to grant building or occupancy permits, verify code compliance, and maintain official city records.

Matt Parkerson

Matt Parkerson is the President of StorX Solutions, a Flowery Branch, Georgia company that designs, supplies, and installs turnkey warehouse storage and automation systems. He focuses on material handling, systems integration, and warehouse optimization, helping distribution centers, 3PLs, and manufacturers get more capacity and efficiency out of their facilities.