Roofing in Unincorporated LA County: Permits Explained

Is your home actually in unincorporated LA County?

Many San Gabriel Valley homeowners are surprised to learn they live in a census-designated place rather than a city. The ZIP code and the city name printed on mail were set by the postal service, and they often spill across jurisdiction lines.

• Check your property tax bill. The tax rate area and the listed city, or the absence of one, show who governs the parcel.
• The LA County Assessor's online parcel map also shows whether a lot sits inside any city's boundary.
• Ask who collects your trash and patrols the street. County service often means county permits too.
• Call the city building counter you think applies. If they say the address is not theirs, it belongs to the county.

Unincorporated pockets in our area include East San Gabriel, South San Gabriel, Altadena, East Los Angeles, Hacienda Heights and Rowland Heights. Some contract cities also route permits through a county office, which adds to the confusion.

Who issues the permit: city, contract city or county

Permit fees and county review times shift with scope and over time, so you will not see us promise either. When we prepare your written quote, the permit appears as its own line, and we pull it once you approve the job.

Which roof jobs need a county permit?

As a rule of thumb, replacing the roof covering, replacing sheathing or changing the structure calls for a permit. Swapping a handful of broken tiles or a cracked pipe boot usually does not. The county's own rules decide the edge cases, so we confirm the scope with Building & Safety when a job sits close to the line.

• Full tear-off and re-roofing of a shingle, tile or flat roof.
• Overlaying new shingles on an existing layer, where the code still allows it.
• Replacing roof decking or rafters damaged by rot, fire or a fallen tree.
• Adding skylights, solar mounting, or changing the roof's shape on an addition.

California law also ties permits to licensing. Any job that needs a building permit must be done by a licensed contractor, and roof work falls under the C-39 Roofing classification. You can look up any roofer's license and workers' comp record on the CSLB website before signing.

What a county reroof inspection looks at

Inspections usually happen in stages. The inspector may want to see the bare deck after tear-off, the underlayment and flashing before the finish layer covers them, and the completed roof at the end. We schedule each visit and keep the permit card on site.

1. Deck condition: solid sheathing, correct nailing, and any replaced boards called out on the permit.
2. Underlayment and flashing: valleys, walls, chimneys and drip edge installed before shingles or tile.
3. Ventilation: intake and exhaust openings that match the attic, with screened vents.
4. Energy code paperwork: on steep-slope reroofs of 50% or more, Title 24 cool-roof rules can apply in Climate Zone 9, so the product's CRRC label or a listed exception matters.
5. Final: finished roof, cleaned gutters, and the job card signed off.

How does a county reroof move from quote to final sign-off?

LA County handles its building permits through EPIC-LA, the Public Works online portal where applications are submitted, inspections are requested and case status is tracked. On a typical unincorporated reroof, the sequence runs like this from our side.

1. Confirm the parcel's jurisdiction and fire zone status, then measure the roof and count the layers at the eave.
2. Write the line-by-line quote with the permit, tear-off, any deck sheets and the roof covering as separate items, so you can see what the county fee covers and what it does not.
3. Apply through EPIC-LA once you approve, listing the roof area, the old and new materials and, on a steep-slope roof, the cool-roof product or the exception that applies.
4. Tear off and stop at the deck stage when the inspector wants to see it, with the roof dried in under underlayment or a tarp while we wait.
5. Install flashing, underlayment and the finish covering, then request the final inspection through the portal.
6. Hand you the signed-off permit record with the photo set, which is what a buyer's inspector or your insurer will ask for later.

Altadena and other fire-zone parcels have extra rules

CAL FIRE maps Fire Hazard Severity Zones, and foothill parts of Altadena fall in Very High zones. On those parcels, Chapter 7A of the California Building Code (R337 in the Residential Code) calls for a Class A rated roof assembly, plus vents that resist embers using 1/16- to 1/8-inch mesh. After the Eaton Fire in January 2025, those rules shape every rebuild and reroof in the burn area.

Our fire-resistant roofing work covers Class A assemblies and vent upgrades for foothill homes.

For Eaton Fire properties, the county also runs a one-stop permit center in Altadena, where Public Works Building & Safety and other agencies meet owners by appointment. Reroofing a damaged but standing house is a smaller case than a full rebuild, so ask there which path your parcel takes before materials are ordered.

What our crews notice on county permit jobs

Across East San Gabriel, South San Gabriel and the Altadena flats, a few patterns come up again and again on unincorporated parcels.

• Homeowners who assumed a city permit applied because of their mailing address, and called the wrong counter first.
• Post-war houses carrying two layers of shingles, which usually means a full tear-off rather than another overlay.
• Patio covers and garage roofs added years ago with no permit history, which can complicate a sale later.
• Old spaced board sheathing under shingles that needs a plywood layer before the new roof goes on.

None of these stop a project. They just change the scope, so we photograph them during the inspection and list each one on the quote.

Trade-offs worth settling before the inspector arrives

Permit work forces a few decisions that are easier to make before tear-off than halfway through it.

• Legalizing an old patio cover while the main roof is under permit means extra plan work now. Leaving it off the record can stall an escrow later. We price both paths and let you pick.
• A deck-stage inspection protects you, because rot gets recorded and fixed on the permit, but it can leave the roof open an extra day. In the rainy months we tear off one slope at a time so only part of the house is exposed.
• A CRRC-rated cool shingle clears Title 24 with no argument at final. A darker color may still work through a listed exception such as R-38 ceiling insulation or a radiant barrier, but you need to show that exception on paper.
• Most tile homes fall under the 25 lb/ft² exception. Switching a tile house to shingles removes it, so the lighter new roof then has to meet the cool-roof numbers.

Getting your county reroof started

Three questions settle most of the planning: which office owns the parcel, whether the state fire map flags it, and how many layers sit on the roof today. Once those are answered, the scope, the material list and the inspection schedule follow from them.

Confirm your jurisdiction, check the fire map if you live near the foothills, and ask any roofer you talk to how they handle the county permit and inspections. Call (725) 745-8803 when you are ready for a photo-documented roof assessment and a written quote that lists the permit on its own line.