Roofing Los Gatos

Every Los Gatos roof is Class A, and the hills and old districts ask more

The Town of Los Gatos tells re-roof applicants that every roof in town must be Class A fire rated, whether or not the house sits in a mapped fire hazard zone. Uphill, lots on the Hillside Area Map add a second limit: roof materials may not exceed a light reflectivity value of 30 and should be a dark earth tone. Both ZIP codes, 95030 and 95032, are in Energy Code Climate Zone 4, where large re-roofs face cool-roof rules.

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  • Rules on this page checked against 10 public sources, October 2026
The La Cañada Building in downtown Los Gatos
The La Cañada Building in downtown Los Gatos. Photo: Ramkumar Menon, CC BY-SA 4.0, via Wikimedia Commons.

How roofing work goes in Los Gatos

The Town rules a Los Gatos roof has to clear

  1. All roofs Class A, applied for online

    The Building Division's residential reroof page states that all roofs in Los Gatos must be Class A fire rated, a rule that reaches past the mapped fire zones to the whole town. Applications go through the Town's citizen portal: the applicant registers an account first, and the application itself takes about 20 minutes once the required information is gathered. Staff can return comments, marked-up plans or a request for resubmission through the portal when something is missing or wrong.

    Source: Town of Los Gatos Building Division (permits.losgatosca.gov)

  2. Ordinance 2380 and the reach of the WUI code

    The Town Council approved local amendments to the 2025 California codes on December 2, 2025, in Ordinance 2380, to take effect on January 1, 2026 once state agencies approve them. Among them is clarifying language on the Wildland-Urban Interface code: it covers the materials and assemblies used on the exterior of new buildings and of additions or alterations to existing buildings located in a WUI area. The fire hazard map that draws those areas was approved by Ordinance 2374 on June 17, 2025.

    Source: Town of Los Gatos Building Division (losgatosca.gov)

  3. Hillside Development Standards and Guidelines

    They apply to the areas on the Hillside Area Map: all HR and RC zoning, plus some R-1 lots included for steep slopes or a hillside setting. Their fire standards call for a Class A roof covering or assembly, eaves and soffits protected underneath, noncombustible gutters and downspouts, and attic vents covered with corrosion-resistant mesh. On form, roofs are broken into smaller components, the main roof slope generally runs with the natural slope, and large gable ends on downhill elevations should be avoided.

    Source: Town of Los Gatos Community Development (losgatosca.gov)

  4. Section 29.80.227 and advice on roofing

    The Historic Preservation Committee advises the Planning Commission and approves minor exterior alterations on properties with the historic overlay. Under Town Code Section 29.80.227 it may also, when an owner asks, advise on proposed work on a historic structure, a landmark site or a district property, whether or not a Town permit is needed, and roofing is one of the examples the code names. That advice places no regulation on the property. The Planning Director can also send a pending building permit to the committee when it is unclear whether the work meets the pre-1941 guidelines.

    Source: Town of Los Gatos Planning Division (losgatosca.gov)

State license for this work: C-39 Roofing, B General Building. Look up a contractor's license on the CSLB website (cslb.ca.gov).

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Free to request, and you agree the scope and price with the person you hire before work starts. In California, a job over $1,000 in labor and materials, or one that needs a building permit, must be done by a contractor licensed by the CSLB in the right class. Ask for the license number and check it at cslb.ca.gov.

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The work

What a Los Gatos roof replacement usually has to settle

  • Shakes coming off a house built before 1941

    The Residential Design Guidelines say composition shingles may be acceptable in place of wood shakes, provided the shingle has a texture like the other houses in the neighborhood. They also ask that roof materials suit the traditional style of the house, naming concrete tile on a Craftsman as the example to avoid. In a historic district, minor repair with materials replaced in kind needs only a building permit, while a residential exterior modification goes through a Minor Development application that the Historic Preservation Committee reviews. Whatever goes on still has to be Class A.

  • A hillside roof that has to stay dark

    On lots under the hillside standards, roof materials are measured on their own rather than averaged with the walls, and may not exceed a light reflectivity value of 30. The roof should be a dark earth tone, in a variety of shades of that color, and exposed metal is painted to complement what sits beside it, anodized dark, or left to develop a patina. The state's Climate Zone 4 re-roof rule pulls the other way, asking a steep roof to reflect sunlight unless an equivalent applies, so the product has to satisfy two different measurements.

  • Copper, flashing and the gutter line

    The design guidelines single out architectural copper because runoff from it can carry pollution into surface waters and the Bay, and they name roofs, gutters and copper-treated composite shingles as its main uses on houses. Their alternatives are another material of similar look, such as coated steel or pre-patinated copper, a clear coating over the copper, and no chemicals brushed on during construction to hurry the patina. Flashing and vents are painted to match the roof color. On hillside lots, gutters and downspouts must also be noncombustible.

  • Skylights and solar panels while the roof is open

    The hillside standards require roof skylights to be tempered or multi-layered glazing, with glass chosen to cut glare at night, and they discourage large domed units. Town-wide, the design guidelines suggest a dormer or clerestory before a skylight, prefer flat-profile skylights to domed ones, and ask that solar panels follow the slope of the roof under them instead of tilting at a different angle. Roofing that is itself the solar array is treated differently by the Energy Code: building-integrated photovoltaic area is exempt from the reflectance requirement.

Roofers installing cedar shingles near the ridge while a telehandler lifts bundles onto the roof
Roofers installing cedar shingles near the ridge while a telehandler lifts bundles onto the roof. Photo: NPS photo, Public domain, via Wikimedia Commons.

The houses here

Protected rooflines downtown, roofs judged against the hills above

Two sets of Town design rules divide the housing. Near downtown, the residential historic districts of Almond Grove, Broadway, Fairview Plaza and University-Edelen were laid out from 1880 onward and keep many Victorian and Craftsman houses. For a historic building, the Residential Design Guidelines adopted in October 2008 list roof lines, eaves and overhangs, shingles and tiles among its protected exterior elements, and any house built before 1941 is reviewed by staff for historic merit when an application to remodel it comes in. Uphill, the Hillside Development Standards and Guidelines govern every lot zoned HR or RC and some R-1 lots on the Hillside Area Map. They aim to keep buildings from contrasting with the natural setting, including glare seen from the valley floor, so the roof's shape and color are part of the review.

Part by part

Two parts of town where the roof answers to design rules

  • Almond Grove, Broadway, Fairview Plaza and University-Edelen

    The residential historic districts. The Town's approval process separates minor repair with materials replaced in kind, which needs only a building permit, from a residential exterior modification, which needs a Minor Development in an Historic District application that staff check against the Town Code before the Historic Preservation Committee reviews it. Moving from shakes to shingles, or from tile to anything else, is the kind of change to raise with Planning before ordering.

  • HR and RC hillside zones

    Lots zoned Hillside Residential or Resource Conservation, plus the R-1 lots the Hillside Area Map adds. Here the roof has to be Class A under the hillside standards as well as under the Town-wide rule, its materials are held to a light reflectivity value of 30 on their own, and gutters and downspouts must be noncombustible.

Before you hire

Questions to put to a Los Gatos roofer before the bid is signed

  • Does the shingle, tile or shake you are bidding reach Class A as installed, and which listing will go in with the permit application?
  • Is our lot on the Hillside Area Map, and what light reflectivity value does the roofing you propose carry?
  • On a pre-1941 house, is this a repair in kind or an exterior change, and will you check with Planning before materials are ordered?
  • Which Climate Zone 4 path does the bid take: a reflective product, R-38 in the attic, a radiant barrier, or no ducts in the attic?
  • Confirm the C-39 Roofing license is active on cslb.ca.gov and ask for proof of workers' compensation coverage before anyone climbs up.

Free, no obligation. Next, add your details in the request form.

Questions

Los Gatos roof questions, with the Town's answers

Our Los Gatos house is nowhere near the hills. Does the new roof still need a Class A rating?

Yes. The Building Division's reroof page says all roofs in Los Gatos must be Class A fire rated, and it does not limit that to the mapped fire hazard zones. Ask the roofer for the listing that shows the chosen product reaches Class A as it will be installed, since some products earn the rating only as part of a tested roof assembly.

Can composition shingles replace the wood shakes on our pre-1941 Los Gatos house?

They can. The Residential Design Guidelines say composition shingles may be acceptable in lieu of wood shakes when their texture is similar to other houses in the neighborhood. In a historic district a change of material goes beyond repair in kind, so expect a Minor Development application and Historic Preservation Committee review. Outside the districts, staff review a pre-1941 house for its historic merit, starting from the Town's 1991 Historical Resources Survey.

How can a hillside roof here be dark and still meet the state's cool-roof rule?

The hillside standards cap roof materials at a light reflectivity value of 30 and ask for a dark earth tone. The Climate Zone 4 rule, triggered when more than half of a steep roof is replaced, asks for an aged solar reflectance of at least 0.20 with emittance of 0.75, or an SRI of 16. It is satisfied another way if the ceiling has R-38 insulation, the attic has a qualifying radiant barrier or no ducts, or the deck carries R-2 continuous insulation. Roofing of 25 pounds per square foot or more is exempt.

Can we ask the Historic Preservation Committee about a new roof before we apply?

Yes. Town Code Section 29.80.227 lets the committee, at the owner's request, advise on proposed work on a historic structure, a landmark site or a property in a historic district, and it lists roofing among the examples. The advice is guided by the Town's preservation standards but places no regulation on the property, so it is a way to test a material or color before an application goes in.

Do copper gutters suit a Los Gatos hillside house?

Copper is noncombustible, which the hillside standards ask of gutters and downspouts, but the Town's design guidelines are wary of architectural copper because runoff from it can carry pollution into surface waters and the Bay. Their suggestions are a material of similar look such as coated steel or pre-patinated copper, a clear coating over the copper, and no chemicals applied on site to speed up the patina.

Where these facts come from

Checked against these public sources in October 2026. Rules and programs change: confirm permit requirements with the city before work starts, and a contractor's license on the CSLB website.

  • permits.losgatosca.gov: Apply for a Residential Reroof (permits.losgatosca.gov)
  • losgatosca.gov: Current Adopted Codes (losgatosca.gov)
  • losgatosca.gov: Local Responsibility Fire Hazard Severit (losgatosca.gov)
  • losgatosca.gov: Hillside Development Standards and Guidelines Full (losgatosca.gov)
  • losgatosca.gov: 985 (losgatosca.gov)
  • losgatosca.gov: Historic Preservation Town Code (losgatosca.gov)
  • losgatosca.gov: Historic Districts (losgatosca.gov)
  • energy.ca.gov: CEC 400 2025 010 F (energy.ca.gov)
  • energy.ca.gov: BuildingClimateZonesByZIPCode ada (energy.ca.gov)
  • cslb.ca.gov: Licensing Classifications Detail (cslb.ca.gov)

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