Rancho Cucamonga is the biggest city in this set, with a well-written roofing policy you can actually read. That is great news for anyone planning a tile roof job. Let us go through it together.
Who lives here and what they own
The Census Bureau counts about 60,900 homes. The median year built is 1988. About 4.4 percent were built before 1960 and 29 percent before 1980. Roughly 62 percent of homes are owner-occupied, and the median home value is $740,200 (ACS 2020-2024).
With a median build year in the late 1980s, many roofs here are decades old. Homes from that period may have tile, which was common across Southern California housing, but each house is different. An older tile roof with an original underlayment may be due for a look.
The city's reroof policy, in plain English
Here is a real plus: the city published a roofing policy sheet (Revision D, dated August 11, 2020). Please check with the city for any newer version, since it refers to the 2019 codes.
- Under 400 square feet on a home: a Roof Repair Permit.
- Over 400 square feet, or a lift and relay over 400 square feet: a Reroof Permit.
- A repair covering more than 50 percent of a detached home's roof: also a Reroof Permit.
- Roofs go back with the material that was originally approved. Switching, for example from tile to shingle, needs Planning approval.
- Tile heads are nailed, eave tiles are clipped, and ridge, hip and rake tiles are set in mastic.
- Tile weighs more than 6 pounds per square foot? A structural evaluation from a licensed design professional is required.
- Class B roofing is the minimum, and Class A in very high fire zones.
- Inspections include tear-off, sheathing if it is new, and a final.
The sheet also notes that tear-off must expose the sheathing, and that damaged wood must be replaced. That is good to know when you compare bids: ask who pays for rotten boards found under the old roof.
Questions on materials can go to the Planning Department at 909.477.2750, per that sheet. The city's Building and Safety page lists (909) 477-2710.
Fire zones
CAL FIRE maps put about 30 percent of the city in the very high zone and about 37 percent in any mapped zone (our estimate from jurisdiction acres, around 8,900 in the very high zone). The policy's Class A rule for those areas is the part to remember. It is a map-based rule, so ask the city which side your address falls on.
Weather and heat
A NOAA station about 3 kilometers away averages roughly 17 inches of rain a year (1991 to 2020). That extra rain makes underlayment and flashing worth a careful look. The city is in California climate zone 10.The city's sheet cites the older 2019 energy values for shingles and other products, so confirm which edition applies today.
What it may cost
These are national estimates. No Rancho Cucamonga price guide is published.
- A typical full tile roof: about $8,200 to $24,600, or around $16,000 on average (This Old House, April 2026).
- A 1,500 square foot roof: $19,000 to $35,000 typical (Fixr, January 2025).
- Removing an old roof: $0.50 to $1.50 per square foot (Fixr).
Open the cost guide for a full table.
Lift and relay under this policy
The city's sheet treats a lift and relay over 400 square feet like a re-roof, which means the same permit. That is helpful to know, because some owners assume that keeping their own tile means skipping the paperwork. Under this policy, it does not for larger jobs.
It also means your bid should spell out the scope in square feet. Ask the roofer how big the area is, and whether the work stays under or goes over the 400 square foot line. Since the sheet separates repairs from re-roofs, a clear number protects you.
Get ready to call
Before you hire, decide whether you want to keep the tile or replace it. Ask each roofer to say how many square feet they count, what underlayment they use and whether a permit is included. Then confirm each license at cslb.ca.gov. With the city's policy in hand, you will be a step ahead.
Where the numbers come from
- City of Rancho Cucamonga, Re-roofing and Policy Implementation for Roof Repair (Revision D, August 11, 2020)
- U.S. Census Bureau, ACS 2020-2024 5-year, place table (housing age, owner share, home value)
- CAL FIRE Fire Hazard Severity Zones (current map), jurisdiction acres, our place data (estimate)
- NOAA 1991-2020 climate normals, station US1CASR0034, about 3 km away
- This Old House, Tile Roof Cost (updated April 10, 2026)
- Fixr, Tile Roof Installation Cost (updated January 31, 2025)
