Tile Roof Costs in Simi Valley

Simi Valley is among the largest cities in the county, and a large share of its homes belong to owners who have lived with their roofs a long time. This page reads the public record and asks what it may mean for a tile roof. It is a reference only and offers no work.

The housing record

The 2020 to 2024 Census estimates count 45,290 housing units. The median year built is 1980, and 49.7 percent of homes predate 1980. Just 4.9 percent predate 1960. Owners occupy 72.9 percent of homes, a high share for the county. The median home value is about $824,000.

With half the stock built before 1980, many of these roofs may have been replaced once, and some may be original. If they are tile, they may be reaching the point where the underlayment is the weak link. A roof owner who has lived in the house for decades may not have seen what is under the tile, and a short inspection can answer that.

Possible tile

Homes of this period may carry concrete tile or clay. The records do not say which. If concrete, Fixr's February 2026 replacement range is $14,000 to $24,000, and RoofingCalc's installed range is $9.50 to $23.50 per square foot with $1.00 to $2.00 added to remove old tile. For clay, Fixr's replacement range is $14,000 to $28,000.

A wide fire share

CAL FIRE's current map places 66.3 percent of the city's area in the very high zone, about 17,630 acres, and 76.4 percent in some mapped zone. Two other cities in our set have larger very high shares. The Woolsey Fire, which CAL FIRE records as starting on November 8, 2018 and burning 96,949 acres across two counties, is part of the area's recent history.

Share is an average across the city, so a flat street and a hillside street may differ. Tile is non-combustible, and local rules in mapped zones may reach vents, underlayment and eave closures. Ask the city what applies and have a bid name each part.

Climate

The place data places Simi Valley in California climate zone 9. It holds no rain station for the city, so we give no rainfall figure and do not borrow one from elsewhere. If more than half the roof is replaced, the Energy Commission says cool roof values may apply according to zone and slope, so ask which Energy Code edition governs your permit.

Permits

This page does not quote a Simi Valley fee or re-roof rule. Please contact the division directly.

Repairs and replacement

Fixr's January 2026 leak repair guide lists minor concrete tile repair at $450 to $1,500 and clay at $500 to $1,800. Major tile repairs rise to $7,000 and $8,000. For an owner with a few loose or cracked tiles, a repair is a different job from a replacement, and the guides price them apart.

Consider the cost of waiting, too. Cracked tiles let water reach the underlayment. Fixr says the most common tile fix is replacing cracked or slipped tiles, so small attention early can postpone larger work.

Checklist for a bid

• Does it separate tile, underlayment, flashing and permit?
• Does it say what is reused and what is replaced?
• Does it name the underlayment product?
• Does it state whether the frame was checked for tile weight?
• Does the contractor's license at cslb.ca.gov show active status and roofing as a classification?

The price guide lists every range and its date.

A note on age

The median year built of 1980 is a useful marker. Roofing practice, tile weight and code requirements have all changed since then, so a roof from that year may differ from one laid today in the underlayment, the flashing and the way the tile is fixed. None of that means it is failing. It means that an inspection by someone who knows older tile work is worth the small cost, and that a bid should say plainly what it will replace and what it will keep. Fixr puts an annual roof inspection at around $430 (Jan 27, 2026).

Limits

We hold no count of tile roofs in Simi Valley, no rain record and no local price data. Permit rules are not covered here.