Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
After
Before
AfterFast, Reliable Roof Replacement Across Hillsborough
A full roof replacement on a Hillsborough estate home typically runs $38,000 to $90,000+ depending on material choice, roof complexity, and what we find when the old roof comes off. Most projects take two to five weeks from permit approval to final inspection. That range is wider here than in neighboring flatland cities because Hillsborough design review often requires period-matching clay tile or slate rather than standard asphalt shingles.
We know Hillsborough’s streets: the winding drives off Chateau Drive, the wide lots along Crystal Springs Road, the gated entries near Carolands and Tobin Clark. Our crews work here regularly, and our dispatchers route us here from our San Francisco Bay Area coordination office. When you call (424) 766-4937, a live person answers, day or night.
Why Birchbark Roofing Is Hillsborough’s Preferred Roof Replacement Company
Hillsborough homeowners ask a different set of questions than roofers hear in Burlingame or San Mateo. They’re not asking whether we can slap on architectural shingles next week. They’re asking whether we can source clay tile profiles that stopped being manufactured in 1972, whether our crew understands how to protect a 1930s slate roof while staging materials on a 1-acre estate, and whether we’ll document every structural change in writing before framing begins. Those are the questions we’re built to answer.
Erik Lindgren, who leads our team, has spent years working on estate roofs along the Peninsula. Our customers in Hillsborough consistently mention two things in their feedback: that the written price matched the final invoice, and that the clean-up photo showed their landscaping untouched. We don’t trade on review counts. We trade on showing up with shoe covers on, drop cloths through the hallway, and a plan for the dog’s door schedule.
Flat Roof Replacement in Hillsborough
Flat Roof Replacement in Hillsborough almost always involves older custom homes from the 1950s through 1970s, where flat roof sections over garages, wings, or covered patios have outlived their original built-up roofing or early torch-down membranes. A flat roof replacement on a Hillsborough home typically runs $14,000 to $32,000 depending on square footage, insulation requirements, and drainage corrections.
The challenge with flat roofs here is what’s underneath. Many original flat sections were framed with minimal pitch, and decades of fog-cycle dampness from the town’s marine layer means decking rot is common. We inspect before we quote, and we write the allowance for decking replacement into the contract rather than discovering it mid-project and springing a change order.
Built-Up Roof Removal and Rebuild
Older flat sections often have three to five layers of built-up roofing with embedded gravel. Removing that weight properly protects the framing beneath. We calculate the tear-off load and schedule disposal before the crew arrives, keeping the driveway clear and the debris contained.
Drainage Correction on Flat Sections
Neighboring flatland cities rarely deal with the canopy of mature oaks and redwoods we see on Hillsborough lots. Leaf litter dams flat roof drains within one season. We re-slope and add oversized scuppers where needed, so water moves off the roof instead of pooling over the garage ceiling.
Roof Installation in Hillsborough
Roof Installation in Hillsborough for new construction or major additions means working with the town’s design review process from day one. A new roof on a custom Hillsborough build runs $45,000 to $110,000 or more, depending on material specification and structural engineering. Most of our Hillsborough installation work happens on 1970s to 2000s custom homes where the original roof is at end of life, or on new estate construction where the architect specified a particular tile or slate profile.
New construction in Hillsborough almost never means standard asphalt shingles. The town’s design review frequently mandates Spanish clay tile, slate, or premium wood shake to match the neighborhood’s established character. That means procurement lead times and specialty installation crews matter. We work directly with material suppliers on period-matching profiles, and we build the ordering timeline into the project schedule so permits and materials arrive in the right sequence.
New Construction Roofing Systems
Building a new estate home in Hillsborough means the roof system gets inspected in phases: framing, underlayment, and finished surface. We coordinate each inspection with the town’s building department and keep your dirt, landscaping, and masonry protected while lifts and materials move across the site.
Roof Decking Replacement During Install
When we open an older Hillsborough roof, what we find at deck level often dictates what the project actually costs. Skipped 1×6 decking, butted joints with no H-clips, and rot at valleys are common in 1920s through 1950s construction. We price decking replacement by the sheet, in writing, before tear-off begins. If we find more rot than expected, you approve the additional work in writing before we touch the framing.
Trusted Brands We Service in Hillsborough
We install and service roofing systems from GAF, CertainTeed, and Owens Corning, along with specialty clay tile and slate sourcing for period estate homes. That matters in Hillsborough because no one keeps 1930s mission tile profiles on the shelf at a supply yard. We work with specialty tile suppliers and reclamation yards that serve the Peninsula’s estate market, and we coordinate delivery windows around your property’s gate access and contractor parking. For flat sections, we stock the membrane and flashing lines we use most often across our Bay Area service area, which means faster turnaround when a section of your roof needs repair mid-project.
Common Roof Replacement Problems We See in Hillsborough Homes
Here’s what we actually run into on Hillsborough roofs:
- Original low-fired clay tile cracking during tear-off. Clay tile from the 1920s through 1950s was fired at lower temperatures than modern machine-pressed tile. It’s brittle now, and careless removal destroys pieces that can’t be replaced off the shelf. We hand-remove and palletize salvageable tile for reuse on the same roof.
- Skipped or undersized decking discovered after tile removal. Many original estate roofs used 1×6 boards with gaps, not solid plywood sheathing. The gaps allow moisture and heat to move, but they also hide rot at valleys and penetrations. We price decking replacement by the sheet, in writing, before tear-off starts.
- Failed waterproofing at valleys and flashing penetrations. On older Hillsborough roofs, the tile lasts but the underlayment beneath it fails. Once water gets past the underlayment at a valley or chimney flashing, it rots the sheathing for years before it shows on the ceiling. We replace the entire waterproofing plane when we re-roof, not just the spots that look wet.
- Heavy moss and lichen on north-facing clay tile sections. The fog and dense canopy on Hillsborough’s estate lots keep roof surfaces damp far longer than in flatland cities. Moss colonies wedge into tile overlaps and crack them. We use soft-wash treatment appropriate to the biology, never high-pressure washing, and we handle tile replacement after the moss is gone.
Pricing for Roof Replacement in Hillsborough, CA
We Also Serve Cities Near Hillsborough
Our crews work throughout the Bay Area and beyond. If you own property in Los Angeles, San Diego, San Jose, or San Francisco, we can coordinate a roof assessment there as well. While the design review process in Hillsborough is its own world, the same crews and the same written-price guarantee apply. You can learn more about our Roof Replacement process or see how we approach projects across Hillsborough on our local pages.
Serving Hillsborough, CA - Our Local Coverage Area
We’re based in the Hillsborough area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Roof Replacement in Hillsborough
Does Hillsborough require a permit for a like-for-like roof replacement?
Yes. Hillsborough’s building department requires permits even when you’re replacing a roof with the same material in the same configuration. Design review may also require you to match original material profiles, which means we handle permit submittal, material documentation, and inspection scheduling as part of the job. Call (424) 766-4937 and we’ll walk you through what your specific roof triggers.
What happens if you find outdated wiring or damaged framing when you open up my Hillsborough roof?
The answer to this one is in the contract before we start. We inspect the roof before we quote, and we write an allowance into the job for decking replacement and structural repair by the sheet or by the linear foot. If we open the roof and find more rot than the allowance covers, you get a written change order with a dollar amount before we touch the framing. You approve it or we stop and discuss options. No one frames your roof without your signature.
Why can’t I just use standard asphalt shingles on my Hillsborough estate home?
Because Hillsborough’s design review process frequently requires reroofing projects to match the original materials of the home’s construction era. Many estate homes built between the 1920s and 1950s have Spanish clay tile or slate that design review treats as part of the property’s architectural character. Substituting standard asphalt shingles is often not permitted, and even where it is, the roof’s structure and drainage were designed around tile weight and profile. We handle the sourcing and documentation for you.
How do you handle moss and lichen on original clay tile roofs without cracking them?
We use biologically appropriate soft-wash treatments, not pressure washing. Original low-fired clay tiles crack under the force of a pressure washer, and once they crack, they’re difficult to source. After the moss is treated and removed, we hand-lift and inspect tile sections for damage, then replace broken pieces with period-matching profiles sourced through specialty suppliers. The treatment schedule is written into your job timeline.
What should I ask to compare two roof replacement bids in Hillsborough?
Ask each contractor: Does your price include permit submittal and design review documentation? How do you handle decking replacement if you find rot, and is that price in writing before tear-off? Will you source period-matching tile or slate if my roof requires it? What does your warranty cover, and who stands behind it in five years? Then call (424) 766-4937 and ask us the same questions. We’ll answer in writing.
Call Birchbark Roofing for Your Hillsborough Roof Replacement
If your Hillsborough roof is showing its age, or if design review has already told you what you’ll need to match, we’d like to walk the property with you. Erik Lindgren and the Birchbark team will inspect the roof, talk through what we see, and hand you a written price in dollars before any work begins. Shoe covers at the door, drop cloths through the hallway, and a clean-up photo before the crew leaves. Call (424) 766-4937 to schedule your free estimate.
Written by Erik Lindgren, Owner at Birchbark Roofing, serving Hillsborough estate homes with period-appropriate roofing systems.