One City, Eighty Years of Roofs, and No Single Right Answer

Yes. Replacing a roof covering on a home in Ontario requires a building permit through the City of Ontario Building Department, and the work is inspected. This applies to a full tear-off and generally to a tile lift-and-relay as well, since replacing the underlayment is replacing the roof system regardless of whether the tile you see is new.

The reason to care is not the fine. It is that the inspection is your only independent confirmation that the deck was repaired, the underlayment was installed to the manufacturer’s requirements, and the flashing was replaced rather than reused. It also protects you at resale, where an unpermitted re-roof discovered by a buyer’s inspector turns into a demand to open the work back up. We pull permits at the start of the project rather than partway through, which keeps the inspection schedule aligned with the construction sequence instead of stalling the job.

Not as a recommendation, and in most cases not at all. Code limits how many roof covering layers can be carried on a residential structure, and two layers is generally where that limit sits. Beyond the code question there is a practical one: layering hides the deck. Nobody, including you, knows the condition of the sheathing under two existing layers, and if there is rot down there a third layer is being fastened into compromised wood.

There is also weight. A layered composition roof adds real dead load to framing that was designed for one layer, and older Ontario homes near the historic core were not built with a margin for it. The correct scope on a two-layer roof is a complete tear-off to the deck, an inspection of the sheathing with damaged sections replaced, and a new single-layer assembly. It costs more than another overlay and it is the only version of the work that actually resets the clock.

Honest answer: the range on an Ontario home is wide enough that a number quoted before an inspection is not information. The drivers are roof area and pitch, the assembly you are going to, how many existing layers have to come off, the amount of deck repair found once it is open, and how complex the roof is at valleys, dormers and low-slope tie-ins. A single-story ranch with a simple gable and one layer of shingles is a different project from a two-story plan with tile, multiple valleys and a flat section over a patio.

California roofing costs also run above the national average because of labor rates, material costs and the state’s licensing and permitting requirements, and that applies here the same as everywhere else in San Bernardino County. What we can commit to is a free inspection and a written estimate that ties the price to a named scope, including a stated price for deck repair if rot is found, so the number does not move for reasons you were never told about. Financing is available.

The deciding question is whether the failure is local or systemic. A roof with one bad flashing detail, a cracked boot at a plumbing penetration, or storm damage over a small area is a repair, and treating it as a replacement is overselling. A roof where the covering has reached the end of its service life across the whole plane, where granule loss is general rather than localized, or where multiple leaks are appearing in unrelated places, is telling you the system is done.

Age matters as an input but not as a verdict. A twenty-year-old architectural shingle roof in good condition with sound flashing may have years left; a fifteen-year-old roof that was installed over an existing layer on a marginal deck may not. What actually settles it is looking at the flashing, the deck where it can be seen, the attic side for staining and daylight, and the pattern of where water is getting in. A free inspection will give you that, and a contractor who is willing to tell you it is a repair is worth more than one who is not.

Yes. We are a licensed and bonded California Class B General Building Contractor, CSLB License #1105333. You can verify that yourself at cslb.ca.gov, which shows the license status, classification, bond and any history attached to it. California requires a CSLB license for any construction or remodeling project valued at $500 or more, so this check applies to essentially any real roofing job in Ontario.

The Class B general building classification is worth understanding rather than just noting. It means the roof and the trades a roof project touches sit under one license: framing and deck repair, stucco at wall terminations, fascia and soffit, drywall and paint on the inside, and coordination of the licensed specialty subcontractors where a scope calls for them. For a leak that has already caused interior damage, that is the difference between one accountable contractor and a sequence of separate hires you have to project-manage yourself.

Yes, and they need attention more often than the steep-slope roof beside them. Low-slope sections over covered patios, room additions and the flat tie-ins on newer Ontario plans use a different material system than shingle or tile, and they fail in a different way. Water does not shed off a low slope; it sits, so the assembly has to be genuinely watertight rather than water-shedding, and every seam, edge and penetration has to be detailed for standing water.

The single most common failure point on an Ontario home is not the middle of the low-slope field. It is the transition where the low slope meets the steep slope, where a flashing detail has to move water from one system into the other. When that is done with sealant instead of properly lapped flashing it works for a few years and then does not. We scope the transition explicitly in the written estimate rather than leaving it inside the word roof, because it is the detail most likely to be quietly excluded from a competing bid.