If you’ve ever started a renovation, applied for an ADU permit, or tried to refinance a property in Los Angeles, there’s a good chance someone asked you for as-built drawings. For many homeowners and property managers, that request raises an immediate question: what exactly are as-built drawings, and why do I need them?
This guide breaks it all down — what as-built drawings are, how they differ from other architectural documents, and when LADBS requires them for permits in Los Angeles.
What Are As-Built Drawings?
As-built drawings — sometimes called record drawings — are technical documents that show a building exactly as it was actually constructed, not as it was originally designed. They capture the real, physical dimensions of a structure: wall locations, room sizes, window and door placements, electrical layouts, plumbing runs, and more.
Think of as-built drawings as the “biography” of a building. Original architectural plans show what was intended to be built. As-built drawings show what was actually built, including any modifications, field changes, or upgrades made during or after construction.
What’s Typically Included in an As-Built Drawing Set?
A complete set of as-built drawings for a Los Angeles property generally includes:
- Floor plans — accurate room dimensions, wall thicknesses, and layout
- Exterior elevations — the building’s appearance from all four sides
- Roof plan — slope, materials, and drainage layout
- Section cuts — interior cross-sections showing ceiling heights and structural framing
- Site plan — the property footprint in relation to lot lines and setbacks
For more complex properties — commercial buildings, multi-family units, or ADUs — the set may also include mechanical, electrical, and plumbing (MEP) drawings.
Why Are As-Built Drawings Important in Los Angeles?
Los Angeles is one of the most heavily regulated real estate markets in California. Whether you’re pulling a permit, selling a property, or planning a remodel, accurate as-built drawings play a critical role at multiple stages.
As-Built Drawings for LADBS Permit Applications
The Los Angeles Department of Building and Safety (LADBS) frequently requires as-built drawings when homeowners apply for permits on properties where the existing conditions aren’t fully documented. This is especially common in older neighborhoods like Silver Lake, Hollywood, and Culver City, where buildings were constructed decades before digital records existed.
If you’re adding an accessory dwelling unit (ADU), converting a garage, or expanding your home’s footprint, LADBS plan checkers need to see verified existing conditions before they can approve your new work. Submitting inaccurate or hand-sketched drawings can lead to plan check rejections, costly revisions, and project delays.
Having a professionally prepared as-built drawing set from the start eliminates that friction and keeps your permit moving forward.
Remodels, Additions, and Unpermitted Work
Many Los Angeles properties especially those built before the 1980s — have unpermitted additions, converted garages, or informal room modifications. When owners want to legalize that work, sell the property, or take out a construction loan, lenders and title companies typically require documentation of the building as it currently stands.
As-built drawings provide that legal and technical foundation. They give your contractor, architect, and permit consultant a shared reference point so everyone is working from the same verified data.
How Are As-Built Drawings Created?
Traditionally, as-built drawings were created by a drafter who would walk the property with a tape measure and a notepad — a process that was slow, labor-intensive, and prone to human error.
Today, modern firms like use laser field measurement and 3D scanning technology to capture precise measurements of every surface in a building. A handheld laser device or a LiDAR scanner records thousands of data points in minutes, producing a highly accurate point cloud that drafters then convert into clean CAD or Revit drawings.
Process
Our as-built workflow for Los Angeles properties follows three core steps:
- Field measurement — Our team visits your property in Los Angeles and uses laser measurement tools or 3D scanning to capture all existing conditions. Site visits are typically completed in a few hours depending on the property size.
- CAD / Revit drafting — Measurements are converted into professional, permit-ready drawings in AutoCAD or Revit, formatted to LADBS standards.
- Review and delivery — You receive a complete drawing set ready for submission to LADBS, your architect, or your contractor.
We’ve been doing this since 1998, and we understand exactly what Los Angeles plan checkers expect to see.
As-Built Drawings vs. Original Architectural Plans
A common question we hear from Los Angeles property owners is: “I have the original blueprints — do I still need as-built drawings?”
The short answer is: often, yes. Original architectural plans show the design intent at the time of construction. Over the years, buildings change. Walls get moved, windows get added, garages get converted, and HVAC systems get replaced. None of those changes appear on the original blueprints.
If you submit original plans to LADBS for a permit and the field inspector finds that the actual building doesn’t match those drawings, your project can be put on hold while corrections are made. As-built drawings eliminate that risk by documenting what’s actually there today.
When Do You Need As-Built Drawings in Los Angeles?
Here are the most common situations where Los Angeles property owners need as-built drawings:
- Applying for an ADU permit or garage conversion
- Submitting a remodel or addition permit to LADBS
- Legalizing unpermitted work
- Refinancing or obtaining a construction loan
- Listing a property for sale where buyer’s counsel requests documentation
- Hiring an architect or contractor who needs verified existing conditions
If you’re unsure whether your project requires as-built drawings, offers free consulting — both in-person at our Los Angeles office and online — to help you figure out exactly what you need before you start spending money.
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Our team has been delivering accurate, LADBS-compliant as-built drawings for Los Angeles homeowners, contractors, and developers since 1998. Whether you have a single-family home in Culver City, a multi-unit building in Hollywood, or a commercial property in DTLA, we’ll get your drawings right the first time.
