---
title: "Simi Valley Roofing & Roof Repair | Global Green Roofing"
description: "Roofing and roof repair in Simi Valley: online reroof permits, the zone 9 cool-roof rule in every ZIP, and Class A re-roofs in the Very High fire zone."
source: https://globalgreenroofing.com/service-areas/simi-valley-ca/
---

# Roofing and Roof Repair in Simi Valley, CA

Global Green Roofing offers roofing and roof repair in Simi Valley: leak repairs, re-roofs, tile and cool roofs.

The cool-roof rule applies across the city: every ZIP code is in Title 24 climate zone 9, where replacing more than half of a pitched roof requires a rated cool surface unless an exception applies. The Class A rule applies inside the High and Very High zones, which by our calculation cover about 72% of the city's land, to re-roofs of 50 percent or more within 12 months.

-   **Permit office:** City of Simi Valley Building & Safety, 2929 Tapo Canyon Road; reroof permits online
-   **Title 24 climate zone:** 9 in every city ZIP code (93062, 93063, 93065, 93094, 93099)
-   **Cool roof on a re-roof:** Required when more than half of a steep or low-slope roof is replaced, unless an exception applies
-   **Fire hazard map:** Ventura County Fire's 2025 map, effective July 1, 2025; about 66% of city land Very High (our calculation)
-   **Housing age:** Median year built 1980; 34% of homes built 1980 to 1999

## Getting a reroof permit in Simi Valley

Simi Valley handles reroof permits online through its Customer Self Service portal. What the city says about them:

-   "Residential reroof review is 2-3 days."
-   "If you are installing brand new roof tile please include the ICC report under the attachments."
-   A contractor pulling the permit files a Construction Permit Declaration; a homeowner pulling it for their own home files the Property Owner's Package.
-   The city lists "re-roofing of more than 10% of the total square footage of the roof or over 100 sq. ft." among the work that requires a permit.
-   Inspection requests received by 4:00 p.m. are performed the next workday.

The city has enforced the 2025 California codes since January 1, 2026 (City Ordinance No. 1366). The state rules behind the permit are in our [guide to roofing permits in California](https://globalgreenroofing.com/roofing-guides/roofing-permit-california/).

## About two-thirds of Simi Valley's land is mapped Very High fire hazard

Simi Valley's local fire hazard map was adopted by the Ventura County Fire Protection District, which approved the State Fire Marshal's 2025 recommended map by Ordinance 33 on May 20, 2025, effective July 1, 2025. Laying CAL FIRE's 2025 map data over the city boundary, we calculate about 17,600 of the city's roughly 26,600 acres as Very High (about 66%), about 6% High and about 4% Moderate. That is land area, not homes, so check your own address on the State Fire Marshal's viewer; the county applies "the highest FHSZ" to a parcel that falls in two zones.

In the High and Very High zones, California's 2025 Wildland-Urban Interface Code requires a Class A roof assembly when 50 percent or more of a roof is replaced within 12 months, along with fire-rated valleys, noncombustible gutters and ember-resistant vents; see [Class A fire-rated roofing](https://globalgreenroofing.com/roofing-guides/class-a-fire-rated-roofing/).

CAL FIRE records that the Easy Fire started on October 30, 2019 at West Easy Street and West Los Angeles Avenue, inside the city, burned 2,375 acres in three days, and destroyed one structure and damaged another.

## Zone 9: a cool roof when more than half the roof is replaced

Every Simi Valley ZIP code is in climate zone 9 on the Energy Commission's list. There, replacing more than half of a pitched roof requires a covering with an aged solar reflectance of at least 0.20 and thermal emittance of 0.75 (or an SRI of 16), and a flat or low-slope roof needs 0.63. The alternatives the code accepts for pitched roofs include R-38 ceiling insulation, a qualifying attic radiant barrier, R-2 continuous insulation at the deck, and, in zone 9, having no ducts in the attic.

Tile is not automatically exempt: the heavy-roof exception starts at 25 pounds per square foot, and standard concrete tile runs about 9 to 10. A tile re-roof here uses a cool-rated tile color or one of the alternatives. The [cool roof requirements guide](https://globalgreenroofing.com/roofing-guides/cool-roof-requirements-california/) sets out the full rule, and [cool roofing](https://globalgreenroofing.com/our-services/cool-roofing/) covers the products.

## What Simi Valley's housing age means for a re-roof

The Census Bureau's 2024 survey puts Simi Valley's median home at 1980: about half were built before 1980 and 34% from 1980 to 1999, and 73% are owner-occupied. For comparison, a 2007 National Association of Home Builders study put the life of an asphalt shingle roof at about 20 years, and the median Simi Valley home is now more than 45 years old.

The code limits what a re-roof on an older house can skip: a new covering may not go over a roof that already has two layers or is water soaked (California Residential Code R908.4), and a replacement removes every layer down to the deck (R908.3). A tear-off exposes the deck, so our [roof replacement](https://globalgreenroofing.com/our-services/roof-replacement/) proposals price any deck repair separately.

## Roofs on mobile homes in Simi Valley parks

Simi Valley points mobile home residents elsewhere: "Mobile home parks in California are largely regulated by the California Department of Housing and Community Development. While the City is not the responsible entity, it understands residents and park owners often need assistance". The state department lists among its roles "the installation, inspection, and maintenance or alteration of manufactured homes", so for a roof on a manufactured home in a park, ask the state department which permit applies before work is booked.

## Services and guides for roofs in Simi Valley

-   [Cool Roofing](https://globalgreenroofing.com/our-services/cool-roofing/): Zone 9 re-roofs need a rated cool surface or an accepted alternative.
-   [Roof Replacement](https://globalgreenroofing.com/our-services/roof-replacement/): Class A re-roofs in the Very High zone, with the permit filed online.
-   [Tile Roofing](https://globalgreenroofing.com/our-services/tile-roofing/): Tile re-roofs, with the ICC report the city asks for when tile is new.
-   [Cool Roof Requirements in California: What Title 24 Asks of a Re-Roof](https://globalgreenroofing.com/roofing-guides/cool-roof-requirements-california/): The zone 9 values and exceptions in full.
-   [What Is a Class A Fire Rated Roof, and When Does California Require One?](https://globalgreenroofing.com/roofing-guides/class-a-fire-rated-roofing/): What a Class A re-roof includes in a Very High zone.

## Roofing in Simi Valley: common questions

### How long does a reroof permit take in Simi Valley?

The city says residential reroof review is 2 to 3 days, through its online Customer Self Service portal. New roof tile needs its ICC report attached to the application.

### Does a small roof repair in Simi Valley need a permit?

A repair below both limits on the city's list, re-roofing more than 10% of the roof's total square footage or over 100 square feet, is outside what the city lists as needing a permit; the city's wording does not say which limit governs when they differ, so check with the Building & Safety front counter at (805) 583-6723.

### Is my Simi Valley home in a Very High fire zone?

About two-thirds of the city's land is, by our calculation from CAL FIRE's 2025 map, so check the exact address on the State Fire Marshal's viewer. Where a parcel spans two zones, Ventura County Fire applies the higher one to the whole parcel.

### Who handles a roof on a mobile home in Simi Valley?

The city says mobile home parks are largely regulated by the state Department of Housing and Community Development, which lists alteration of manufactured homes among its roles. Ask the state department which permit a roof needs.

Other cities we cover are listed on our [service areas](https://globalgreenroofing.com/service-areas/) page.

## Sources for this page

1.  [City of Simi Valley, Building & Safety Division](https://www.simivalley.org/departments/environmental-services/building-safety-division)
2.  [City of Simi Valley, Online permit submittal instructions](https://www.simivalley.org/departments/environmental-services/building-safety-division/online-permit-submittal-instructions)
3.  [City of Simi Valley, Building & Safety frequently asked questions](https://www.simivalley.org/departments/environmental-services/building-safety-division/frequently-asked-questions-building-safety-violations)
4.  [City of Simi Valley, Inspection procedures](https://www.simivalley.org/departments/environmental-services/building-safety-division/inspection-procedures)
5.  [City of Simi Valley, Municipal codes and ordinances (Ordinance No. 1366)](https://www.simivalley.org/departments/environmental-services/building-safety-division/municipal-codes-and-ordinances)
6.  [City of Simi Valley, Mobile home resources](https://www.simivalley.org/departments/environmental-services/neighborhood-services-division/mobile-home-resources)
7.  [Ventura County Fire Department, Fire Hazard Severity Zone map update (Ordinance 33)](https://fire.venturacounty.gov/cal-fire-fire-hazard-severity-zone-map-update/)
8.  [CAL FIRE 2025 LRA Fire Hazard Severity Zone map (viewer); zone acreage by city calculated by us from this layer and the Census city boundary](https://experience.arcgis.com/experience/6a9cb66bb1824cd98756812af41292a0)
9.  [CAL FIRE, Easy Fire incident page](https://www.fire.ca.gov/incidents/2019/10/30/easy-fire/)
10.  [2025 California Wildland-Urban Interface Code, Chapter 5 (504.2, 507.1), via UpCodes](https://up.codes/viewer/california/ca-wuic-2025/chapter/5/special-building-construction-regulations)
11.  [California Energy Commission, Climate Zone Assignments by ZIP Code](https://www.energy.ca.gov/media/3560)
12.  [California Energy Commission, 2025 Building Energy Efficiency Standards, Section 150.2(b)1I](https://www.energy.ca.gov/sites/default/files/2025-07/CEC-400-2025-010-F_0.pdf)
13.  [Eagle Roofing, Concrete roof tile technical specifications (2026)](https://eagleroofing.com/wp-content/uploads/2026/07/EAGLE-2026_Tech_Specs-062326.pdf)
14.  [U.S. Census Bureau, ACS 2024 5-year: housing in Simi Valley (tables B25035, B25034, B25003, via Census Reporter)](https://censusreporter.org/profiles/16000US0672016/)
15.  [Office of the State Fire Marshal, Fire Hazard Severity Zones and map viewer](https://osfm.fire.ca.gov/what-we-do/community-wildfire-preparedness-and-mitigation/fire-hazard-severity-zones)

Public sources read on September 30, 2026. Climate zones and fire hazard maps are drawn by address; check yours with the tools linked above.

## Book a roof assessment in Simi Valley

We inspect, photograph what we find and send a written proposal before anything is decided.

Contact us

## Let's talk roofs

Tell us what is going on with your roof. We will schedule an on-site assessment and send a written proposal before anything is decided.

**Call**(323) 760-7835**Email**info@globalgreenroofing.com

**Serving**Los Angeles and Los Angeles, Ventura and Santa Barbara Counties

**Hours**Every day: 8 AM to 9 PM