The local rules on a Chino Hills roof

The statewide layer

These are not specific to Chino Hills, but they apply to it, and several of them are widely got wrong — including by contractors quoting from habit rather than from the current code.

Fire classification: what is actually required, and where

Every ordinary re-roof has to meet at least a Class C fire-retardant covering. That floor applies to new roofs, to repairs and replacements, and to any existing building where over half the roof area is replaced inside a year.

Class A, the highest classification, is required where the property sits inside a fire hazard severity zone or a wildland-urban interface area, and many cities require it more widely by local ordinance. In practice, across most of south Orange County, Class A is the answer — but it comes from the fire zoning and the local ordinance rather than from a blanket statewide rule, so it is worth confirming for your address rather than assuming either way.

One citation to watch for: since 1 January 2026 the wildfire provisions are their own volume, the California Wildland-Urban Interface Code at Title 24 Part 7. It absorbed what used to be building code Chapter 7A and residential code section R337. Anyone still quoting Chapter 7A is quoting a superseded document.

Tear-off waste and where it goes

CALGreen’s 65 per cent diversion requirement for construction and demolition waste attaches to additions and alterations that increase a building’s conditioned area, volume or size. A straight re-roof does none of those, so the state mandate generally does not reach it.

Local ordinances often do, and the state code explicitly allows a city to be stricter. Several cities capture roofing work through their own construction and demolition rules by permit valuation, which can mean a deposit and a diversion report on an ordinary house. It is a question for your city, and it is worth asking before the skip arrives rather than after.

What a wildfire-zone roof actually has to include

Inside a mapped fire hazard zone the requirements go well beyond what the roof is covered with, and the extra details are exactly where a cheap job differs from a compliant one. It is embers rather than a flame front that destroy most houses in a wildfire, and every requirement below closes a gap an ember could use.

• A roof assembly meeting Class A when tested to ASTM E108 or UL 790
• On profiled tile, bird stops at the eaves and hip and ridge caps mudded in, so there is no open end for embers to enter
• Valley flashing of at least 0.019 inch (26 gauge) corrosion-resistant metal, over a mineral-surfaced cap sheet at least 36 inches wide
• Noncombustible gutters and downspouts, with an approved means of stopping leaves and debris collecting in them
• Vent screening of noncombustible corrosion-resistant mesh, no finer than 1/16 inch and no coarser than 1/8 inch

The right to cancel

The standard cancellation window on a home improvement contract is three business days, five for a senior citizen. Where the contract is to repair or restore damage from a disaster or a declared state of emergency, it is seven business days.

It exists precisely because of what happens in a neighbourhood after a storm. Nothing has to be signed on a doorstep, and if something was, the clock above is the reason to read it again tonight rather than tomorrow.

The code your roof will be built to

California re-roofs are built to Title 24, the California Building Standards Code. The 2025 edition took effect on 1 January 2026 and applies to any project whose permit application was made on or after that date. If your last roof went on before then, it was built to a different edition, and some of what was acceptable on it is not acceptable now.

That matters practically rather than academically: a contractor quoting from habit rather than from the current code will occasionally quote a detail that will not pass inspection, and the inspection is at the end of the job rather than the beginning.

Licensing, deposits and what has to be on the paperwork

Roofing is the C-39 classification with the Contractors State License Board. The minor-work exemption that lets very small jobs be done unlicensed rose to $1,000 at the start of 2025, but it does not apply to work that requires a permit — and a re-roof requires a permit. The practical rule is therefore simpler than the statute: a re-roof needs a licensed contractor, whatever it costs.

Deposits are capped by statute at $1,000 or ten per cent of the contract, whichever is smaller, unless the contractor carries a blanket performance and payment bond with the board. Going over it is a misdemeanour, and in a declared disaster area the court must impose the maximum fine — which says something about how often it is tried after a storm.

Every licensed contractor is required to put the licence number in all advertising, and in contracts, subcontracts and bids. An advertisement without one is itself a signal. The board's own register will confirm a number in under a minute, and it is worth the minute.