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Large estate home with a dark slate-style roof behind mature gardens in Hillsborough

Roofing Contractor in Hillsborough, CA

Hillsborough is within our service area, a 38-minute run of 21 miles from Webster Street on a clear day, with bridge traffic adding time at peak hours. The town has no commercial zoning and no businesses inside its limits, so every roof is a residence, school or park building, and most are large. A reroof here is an exterior change as well as a building permit item, and the Town's own roofing sheet sets a Class A covering requirement. Slate and tile are specialty trades, and we tell owners plainly where our experience ends.
  • 4.9 stars from 60 Google reviews
  • Free written estimates
  • Photo updates by text and email
  • Office on Webster St, Alameda

An estate town with no commercial district

Hillsborough has no commercial zoning, so there is no shop roof, strip mall or office building here. Zoning requires at least a 2,500 square foot house on a half-acre lot, which means big roofs with many planes, valleys, chimneys and skylights. Each of those is a place where water can enter.

We inspect penetrations first. A single failed flashing can ruin plaster inside an expensive house, and a repair at that point costs a fraction of a reroof. Where the roof is worn across the field, we say so and quote replacement.

Roofer inspecting a slate roof section and copper flashing on an estate home in Hillsborough
A roofer inspects slate shingles and copper flashing on a large estate roof.

Weight matters on these roofs. Slate and clay tile are far heavier than composition shingle, which is why the Town's roofing sheet asks for an engineer's report on heavier materials. If you plan to switch materials, ask the engineer to check the framing before the price is set, and ask the Town whether the new look needs Design Review before you order. Keep every approval with your contract papers.

What we do on Hillsborough roofs

  • Roof Repair

    Targeted repair of flashing, valleys and a few failed pieces can protect an expensive roof without disturbing the whole surface, and the estimate says whether the Town should be asked about the scope first.

  • Roof Replacement

    A reroof needs a permit, design review and a Class A covering, so the estimate lays out those steps, names who files, and notes the engineer report heavier materials may require.

  • Skylights

    Large estate roofs carry skylights, and resealing flashing can beat replacement when the glazing is sound, which keeps new curb work and plaster damage out of the quote.

  • Emergency Roof Repair

    An active leak over finished interiors needs fast protection and photographs for the file, with a slate or tile specialist brought in if the material demands one.

  • Roof Inspection

    Owners of half-acre estates with many planes get a documented condition report with photos, useful before choosing between repair, partial replacement and design review for a full reroof.

  • Roof Flashing Repair

    Tall chimneys and long valley runs mean copper or galvanized flashing joints that can fail quietly above plaster ceilings, so the flashing is checked before the field of the roof.

  • Historic Home Roofing

    Houses from the Carolands era onward have original rooflines, chimneys and materials that design review treats carefully, so matching pitch, ridge detail and look is part of the plan.

Permits, Design Review and the Class A sheet

The Town of Hillsborough lists re-roofing as work needing a building permit and also treats it as an exterior change subject to Design Review. Applications are filed electronically through the Town's permit portal. The Town's roofing sheet calls for a Class A fire-retardant covering and notes an engineer's report for heavier materials. The estimate says who applies; the Building Division can verify it.

Skylight curb and flashing on a large tile roof of a Hillsborough estate
A skylight curb and flashing sit within a large tile roof field.

Carolands, the Uplands and Hillsborough's landmarks

Hillsborough's best-known roofs belong to its mansions. The Carolands, built by Harriet Pullman Carolan at about 65,000 square feet, is on the National Register of Historic Places, and the Uplands estate, designed by Willis Polk and opened in 1912, has housed Crystal Springs Uplands School since the 1950s (Wikipedia). Those are public landmarks and not houses we have worked on. They show the scale of roofing the town was built around.

Tall chimneys and a long slate-style roofline on a Hillsborough estate behind mature trees
Tall chimneys and long valleys give an estate roof many joints to flash and inspect.

Because the town has only residences, schools, government buildings, a golf course, a country club and small parks inside its limits, there are no shop or office roofs to compare yours with, and a change to your roof's look is an exterior change that the Town reviews.

Slate, tile and where our experience ends

Ask for the written scope before any work starts. The Town's roofing sheet calls for two inspections on roofs smaller than 75 squares, so confirm the inspection count for your roof's size when you talk to the Building Division.

Large slate and tile roofs from the Carolands era onward are a specialty field. If your roof is slate or clay tile, we will inspect and document the issue and tell you honestly whether we are the right company or a specialist is.

From customers on the island next door

4.9 stars from 60 Google reviews, as of May 2026. Read more reviews

“charles, service coordinator, did an excellent job helping me work with my insurance company on replacing my wind-damaged roof and repairing ceiling and wall areas affected by roof leaks.”
Y. M. · Google review · 2026
“I had an ongoing issue with leaking skylights after a past roof replacement done by another roofer.”
Emilia K. · Google review · 2026

Roofing in Hillsborough: common questions

Does a Hillsborough reroof need Design Review?

Likely, yes. The Town's pages treat re-roofing as an exterior change subject to Design Review, either by the Architecture and Design Review Board or by Planning staff for minor projects. Ask the Town before you choose a material or color, and keep its approval with your contract papers.

Can you repair slate or clay tile?

Ask us on the first call. Slate and clay tile are specialty materials, and a repair done wrong can crack neighboring pieces. We inspect and document the problem and tell you honestly whether we should take the job or whether a slate specialist is the better call. We will not stretch past what we have done.

Which fire rating does Hillsborough require on a new roof?

The Town's roofing requirements sheet calls for a Class A fire-retardant covering. Heavier materials may need an engineer's report, and inspections are requested at least 48 hours ahead. Confirm the current sheet with the Building Division before you order materials, because requirements change with code cycles.

Request a written estimate in Hillsborough

The phone is the fast way. If the water is coming in now, call first and use the form later.

  • 4.9 stars from 60 Google reviews
  • Free written estimates
  • Photo updates by text and email
  • Office on Webster St, Alameda

Call about your Hillsborough roof

Tell us the address and what you are seeing, and we will tell you straight whether we can get there.

Apex Shield Roofing · 1910 Webster St, Alameda, CA 94501 · +1 (209) 563-1278

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