Metal roofing
Architectural shingles
Tile roofing
GAF
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Roofers in Simi Valley, CA
Roofers in Simi Valley work on homes that face a particular combination of intense summer sun, Santa Ana-adjacent wind patterns, and aging original materials from the city’s 1960s-to-2000 building boom. Mercer Roofing handles repair, installation, and full roofing services here with written pricing before any work starts and a 365-day guarantee on every repair. You’ll see a lot of concrete tile and composition shingle in these neighborhoods, and a lot of underlayment that has quietly deteriorated beneath seemingly intact tile. Call (805) 309-3314 when you want a roofer who documents everything in writing before the first nail goes in.
Why Simi Valley Homes Are Different
Simi Valley sits in a bowl between the Santa Susana Mountains and the Simi Hills, which means wind exposure changes noticeably from one block to the next. Homes on the eastern edge near the 118 corridor often catch stronger gusts than those tucked into the central valley, and that wind-driven abrasion is one reason we see shingle granule loss concentrated on certain roof faces rather than evenly distributed. The original lightweight concrete tiles common in older tracts east of the freeway were never designed for four decades of inland sun; they crack, and the underlayment beneath them breaks down into dust long before the tile itself looks failed. That’s the roofing reality in Simi Valley: a roof can look serviceable from the curb while the waterproof layer beneath it is gone.
Most of the housing stock here is single-story ranch or two-story Mediterranean-style built between 1960 and 2000. That means a typical Simi Valley roofing job either involves rescuing an end-of-life original roof or replacing one that was installed during the 1980s and 1990s and has simply aged out. Foothill neighborhoods carry a different concern entirely: elevated wildfire risk. In those areas we regularly recommend Class A fire-rated shingles and ember-resistant venting, because the ember exposure in a wind-driven brush fire is a bigger threat to a Simi Valley roof than direct flame. Permitting runs through the City of Simi Valley, and some HOA-governed communities in the hills have architectural review requirements for material changes, so we confirm that before recommending a roof color or profile change.
Styles & brands we work with
Our Main Simi Valley Services
Most Simi Valley homeowners reach out to us for one of two reasons: something is actively leaking, or they know their roof is near the end and want a straight answer about replacement. Below are the three services we provide here, each with its own detailed page.
Roof Repair in Simi Valley
Simi Valley roof repairs often start small and end up revealing a larger problem once we lift the tile or shingle. A cracked tile near a valley, a lifted flashing joint at a chimney, or a soft spot over a patio are the typical calls. The heat here accelerates sealant failure at penetrations, and once water gets past the underlayment it travels, so a ceiling stain is rarely directly under the actual breach. Every repair we do in Simi Valley includes a written guarantee and a free second visit if the repair fails within 365 days. See Roof Repair in Simi Valley for the full breakdown.
Roofing Company in Simi Valley
When you need to know who is actually walking your property, we send a technician’s name and photo to you before the visit, and that technician badges in with a photo ID at your door. That’s the Mercer standard, and it matters in a city where homeowners tell us they’ve opened the door to people they couldn’t verify. Our Simi Valley work includes troubleshooting, maintenance, repairs, and full roof assessments with written pricing. We carry GAF, CertainTeed, and Owens Corning materials routinely, and we document every condition we find with photos so you can see exactly what we’re seeing. Learn more on our Roofing Company in Simi Valley page.
Roof Installation in Simi Valley
Full roof installation in Simi Valley usually means tear-off down to the decking, because the underlayment on older tile roofs here is rarely salvageable. We inspect the sheathing as we go and replace rotted sections before laying new underlayment and your chosen material. Simi Valley homeowners often weigh tile against composition shingle against newer Class A options; our written quote shows the cost difference line by line before you commit. The Roof Installation in Simi Valley page walks through materials, timelines, and what to expect during the job.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Simi Valley
We work on and install GAF, Atlas, and Tamko roofing systems across Simi Valley, with the other major brands available by order when a homeowner wants a specific match. Common shingle stock is carried in our local supply rotation, so the typical repair doesn’t wait on a special order. See our brands for the full list of what we’re factory- and distributor-aligned to install and service.
See the difference
Before
After
Before
After
Before
AfterPricing for Roofers in Simi Valley, CA
| Service | Typical range in Simi Valley |
|---|---|
| Minor shingle or tile repair | $350 – $800 |
| Flashing repair or replacement | $450 – $1,100 |
| Gutter cleaning and roof inspection | $200 – $450 |
| Roof leak investigation | $250 – $600 |
| Tile underlayment spot repair | $600 – $1,400 |
| Skylight reflashing | $500 – $1,200 |
| Chimney flashing and counterflashing | $650 – $1,500 |
| Full tear-off and re-roof (composition) | $12,000 – $24,000 |
| Full tear-off and re-roof (concrete tile) | $18,000 – $38,000 |
What pushes a Simi Valley quote toward the top of these ranges is usually decking replacement beneath old tile, HOA material requirements in foothill communities, and steep-pitch access on the hillside lots. Whatever the number is, you get it in writing before any work starts, and the price on that sheet is the price on the invoice.
Neighborhoods We Serve in Simi Valley
We cover the full Simi Valley area, from the older tracts east of the 118 to the newer developments and the foothill communities. Our typical scheduling in the city runs one to three business days for a roof assessment, with repairs scheduled as soon as the written quote is approved.
- Central Simi Valley
- East Simi Valley (near the 118 corridor)
- Wood Ranch
- Big Sky / Bridle Path area
- Kathryn Estates and the foothill lots
Service Area – Cities Near Simi Valley
Along with Simi Valley, our crews cover the surrounding Ventura County corridor. We handle roofing work in Moorpark, CA, Oak Park, CA, Thousand Oaks, CA, and Westlake Village, CA. If you’re just across the city line and wondering whether we cover your street, call (805) 309-3314 and ask.
Serving Simi Valley, CA - Our Local Coverage Area
We’re based in the Simi Valley 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 Roofers in Simi Valley
Yes. The City of Simi Valley requires a building permit for full roof tear-off and re-roof, and we pull that permit and schedule the inspection as part of the job. HOA communities in the foothills may have an additional architectural review step, which we help you navigate from the first estimate.
We typically schedule roof assessments in Simi Valley within one to three business days. If you’re dealing with an active leak, tell the person who answers when you call (805) 309-3314 so we can prioritize your visit.
Our written price is fixed before any work begins, and it includes the decking replacement we can see during the estimate. If we uncover hidden rot after tear-off, we stop, show you photos, and get a signed change order before proceeding. You’ll never find a surprise line item on the invoice.
If you’re in Simi Valley and want a roofer who sends a named, photo-badged technician to your door and puts every price in writing first, call (805) 309-3314 to schedule your free estimate.
What happens when you call
- 1A real person answersNo phone trees - talk to a local roofing pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Simi Valley Customers Say
"The whole crew was vetted, which mattered to us with the kids home. Respectful, quiet, and left the place cleaner than they found it."
- Marie C."Detailed written quote with the shingle line and warranty spelled out. No surprises at the end."
- Laura B."Roofer showed his ID and gave me the crew lead's name before anyone climbed the ladder. Replaced a patch of missing shingles and resealed two vent boots. Written estimate matched the final bill."
- Brian J.