Are Building Permits Public Record in LA County? How to Pull a Permit History

Yes, Permits Are Public Record — But Your Address Decides Where You Search

Yes — building permits are free public record in Los Angeles, and the paper trail goes back further than most homeowners expect. The Los Angeles Department of Building and Safety makes public records of commercial and residential buildings available for viewing and copying, with permit records reaching all the way back to 1905. There's one exception: blueprints are withheld unless you provide a copy of the current owner's grant deed plus written authorization from the owner or the architect or engineer of record.

But before you start searching, there's a critical question for Altadena homeowners: which agency actually holds your property's records? Los Angeles is a patchwork of jurisdictions, and the answer depends entirely on where your lot sits.

• LA City properties fall under LADBS, which offers an online building records search, email record requests, and in-person appointments at its Metro or Van Nuys offices.
• Unincorporated LA County — including all of Altadena — runs through a completely separate system called EPIC-LA, the county's online portal for managing permits and inspections from application through final sign-off.
• Incorporated cities like Pasadena maintain their own building departments entirely, so an Altadena address and a Pasadena address just blocks apart can have records in different systems.

This distinction trips up a lot of homeowners. Most of the detailed "how to pull permit history" guides online — including practical advice from licensed brokers — walk through the LADBS system, which doesn't apply to unincorporated county parcels like Altadena's. And while EPIC-LA is well documented for filing new applications and tracking inspections, the county's process for researching historical permit records isn't as clearly laid out, so expect a phone call or counter visit for anything older.

The good news: the search itself costs nothing. As one founding broker puts it, "the tools are free, the information is public, and it only takes a few minutes" — a dramatic change from the days when checking permits meant physically visiting a building department and waiting in line.

Why does this matter so much for Altadena specifically? Because permit history is the foundation of any ADU or garage conversion project. Garage conversions, ADU conversions, and kitchen remodels all require permits in unincorporated LA County, and knowing what was — or wasn't — legally built on your lot shapes what's possible next. With Altadena homeownership at 74% and a median home price of $879,600, per Altadena Heritage, most owners here are sitting on significant equity worth protecting with proper due diligence.

At Altadena ADU Builder, we always recommend pulling a property's permit history before sketching ADU plans — it's the fastest way to surface unpermitted additions, missing sign-offs, or surprises that could complicate a feasibility consultation.

What a Permit History Reveals — and Why It Matters Before an ADU Project

Every property has a story, and your permit history is the written record of it. As one licensed real estate broker puts it, permits "tell a story" — revealing what work was done, when, and whether the city signed off on it. Before you design an ADU, you need to know that story.

What's actually in the file? Depending on the jurisdiction, a property's records can include building permits going back to 1905, certificates of occupancy from 1940 onward, range files documenting violations, plot plans, geology and soils reports, and approved building plans, according to the LADBS records system. The oldest permit is typically the original construction permit, letting you trace every major change since — room additions, remodels, re-roofing, earthquake repairs.

For homeowners weighing a garage conversion, the permit history matters because the county requires permits for exactly the kind of work you're planning. Per LA County's EPIC-LA permitting system, permits are triggered by:

• Garage conversions and ADU conversions
• Decks, patios, and retaining walls
• Kitchen remodels and window/door changeouts
• Electrical, plumbing, and mechanical work
• Any change of occupancy or use

Here's where surprises get expensive. If a previous owner converted the garage without permits, or pulled a permit but never got final sign-off, that unfinished or unpermitted work becomes your problem the moment you apply for an ADU. Unpermitted ADUs are common enough that LADBS now runs a streamlined amnesty program for units built before January 1, 2020 — evidence that discovering an undocumented unit mid-project is a real scenario, not a hypothetical.

A missing certificate of occupancy is another red flag. Without one, major additions are technically incomplete in the eyes of the building department, which can stall a new ADU application until the old work is resolved.

For Altadena homeowners, the stakes are meaningful. Altadena Heritage reports 458 ADUs were approved locally between 2017 and 2022, and the CalHFA grant program offers up to $40,000 toward pre-development costs including permits. Knowing your property's permit story before design begins protects that investment. Altadena ADU Builder covers this due diligence in our feasibility consultations, and JMB Builders LLC (CSLB #1103479), our featured builder, routinely encounters permit-history issues on Altadena garage conversions. Pull the records first — it's free, it's public, and it takes minutes.

How to Pull a Permit History: Step-by-Step for LA City and Unincorporated LA County

Pulling a permit history takes minutes once you know which system your property actually falls under — and that's the first trap for Altadena homeowners. Because Altadena sits in unincorporated LA County, it does not use LADBS, even though most of the detailed how-to guidance online covers LA City.

If your property is in LA City, the LADBS online building records system offers three access routes: a free online search with downloadable PDFs, an email request using the Records Research Request Form sent to [email protected], or an in-person appointment at the Metro Office (201 N. Figueroa St.) or Van Nuys Office (6262 Van Nuys Blvd.). Note that the Records Section only produces documents not already available as PDFs online, so start with the web search.

A licensed broker who walks buyers through this process regularly shares a few practical tips that make the difference between a clean result and a dead end (Clear Way Real Estate):

• Drop the street-type suffix. Search "Lake" not "Lake Street" — including "Street," "Avenue," or "Boulevard" is the most common mistake that throws off results.
• Check directional prefixes. Try East, West, North, and South variations if your first search comes up empty.
• Review every page of results and hover over each entry — permits don't always surface on page one.
• Trace forward from the original construction permit, which is typically the oldest record on file. Every earthquake repair, re-roof, room addition, and remodel should follow from there.

Expect some rough reading on older records: permits from the early 1900s through the 1990s were scanned from microfilm. Records run deep — building permits go back to 1905, and Certificates of Occupancy to 1940.

If your property is in unincorporated LA County — including all of Altadena — permitting runs through EPIC-LA, the county's online system for managing permits and inspections. EPIC-LA is well documented for the application side: online submittals, document uploads, fee payments, and status tracking. What's less clear from available sources is the county's process for pulling historical records on an existing property — we won't pretend otherwise. The practical path for Altadena homeowners is to start at the county portal and, if the online lookup doesn't surface what you need, visit the county's public records counter in person.

This matters before any ADU project. Garage conversions, ADU conversions, and kitchen remodels all require permits, so knowing what prior work was permitted — and what wasn't — shapes your feasibility picture. If your research turns up a possible unpermitted unit, note that LADBS now offers a streamlined amnesty path under AB 2533 for ADUs built before January 1, 2020.

At Altadena ADU Builder, we recommend pulling your permit history before any feasibility work begins. Our free ADU feasibility consultation — including a cost-quiz concept render — starts from exactly this kind of ground truth, and featured builder JMB Builders LLC (CSLB #1103479) works with Altadena's county permitting process regularly.

Red Flags to Look For — Including the Unpermitted ADU Problem

A permit history can look clean at first glance and still hide problems that cost buyers tens of thousands of dollars to fix. Knowing exactly which red flags to scan for turns a routine records search into genuine due diligence.

The first red flag is a major addition or converted space with no certificate of occupancy. As one licensed broker's guide to permit searches puts it, without that certificate the work is "technically not complete in the eyes of the city." Certificates of occupancy are only on file from 1940 onward, so older homes need extra scrutiny on any later additions.

The second red flag is a permit that was filed but never received final sign-off — a sign of abandoned or unfinished work. The third is the most common of all: work done with no permit whatsoever. In unincorporated LA County, permits are required for garage conversions, ADU conversions, kitchen remodels, decks, retaining walls, and even fences over 6 feet, according to the county's permitting portal.

The unpermitted ADU problem is real enough that the state built an amnesty path for it. Under AB 2533, LADBS now offers a streamlined permitting program for unpermitted ADUs and JADUs built before January 1, 2020, featuring simplified plan submittals, optional third-party inspections, and impact fee exemptions. That cutoff date matters: it means many garage conversions sitting behind Altadena's older homes — including detached garages quietly converted decades ago — may qualify for legalization rather than demolition.

• Missing certificate of occupancy on any addition or converted living space
• Permits filed without a final inspection sign-off
• Visible work — a garage conversion, added bathroom, enclosed patio — with no permit record at all
• An unpermitted ADU built before January 1, 2020, which may qualify for the AB 2533 amnesty path

For Altadena homeowners, discovering an illegal garage conversion on your own property isn't the end of the road — it's the start of a legalization decision. Altadena ADU Builder helps homeowners in exactly this situation understand their options, from amnesty eligibility to whether legalizing the unit or building fresh makes more financial sense. And if you're weighing a new ADU project, the CalHFA grant program offers up to $40,000 toward pre-development costs, including permits. Book a free ADU feasibility consultation to get a cost-quiz concept render and a clear-eyed read on what your property can support.

Your Next Move: Clean Permit History to ADU Feasibility

A clean permit history is more than paperwork — it's the foundation your ADU project stands on. Before you draw a single plan, you need to know exactly what the county already has on file for your property.

Start by verifying that prior work was permitted. Garage conversions, ADU conversions, kitchen remodels, decks, retaining walls, and even fences over 6 feet all require permits under LA County rules, so an older garage conversion or addition on your lot may already be in the system. If prior work was permitted and finaled, your ADU plans start from solid ground; if it wasn't, resolving it now avoids surprises mid-project.

Because Altadena sits in unincorporated LA County, your ADU plans need approval from both Regional Planning and the Department of Building & Safety, according to Altadena Heritage's ADU guide. That dual review is exactly why front-loading your permit research matters — the county will examine your property's history as part of any new application. Altadena homeowners have been navigating this path in growing numbers: 458 ADUs were approved locally between 2017 and 2022, so the process is well-trodden even if it involves two departments.

Your pre-development checklist should cover:

• Confirm prior conversions, additions, and major repairs appear in the county's permit records with final sign-off
• Identify any unpermitted structures or open permits that need resolving before ADU plans are submitted
• Budget for pre-development costs — permits, plans, and studies — which can run higher than expected

On the budget front, there's real help available. The CalHFA grant program offers up to $40,000 toward pre-development costs, explicitly including permits, per the same Altadena Heritage report. For a county where the median home price sits at $879,600 and 74% of residents own their homes, that grant can meaningfully offset the early, out-of-pocket phase of an ADU project.

If you'd like help reading your property's permit history and mapping what's feasible on your lot, Altadena ADU Builder offers a free ADU feasibility consultation — including a cost quiz and concept render — so you can see real costs, real permits, and a realistic path forward before committing to anything. Disclosure: this guide features JMB Builders LLC, an Altadena-based licensed general contractor (CSLB #1103479) building custom homes, ADUs, and whole-home remodels, including Eaton Fire rebuilds; JMB is a paid featured builder, and no permit outcomes or timelines are guaranteed.