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Before
AfterFull Roof Replacement in Woodland Hills, CA
A full roof replacement in Woodland Hills typically costs between $13,000 and $28,000 for an average home, takes 3 to 5 days to complete, and involves tearing off the existing roof down to the decking before installing new underlayment, flashing, and shingles. That’s the honest answer up front, because you should know what you’re getting into before anyone climbs a ladder. At Mercer Roofing Co Woodland Hills, every full replacement starts with a written price and ends with a 365-Day Done Right Promise in writing. Call (341) 217-2677 and a live person answers, 24/7.
Full replacement is the bigger commitment compared to repair. Where a repair addresses one failed area, a full replacement means removing every layer of the existing roof, inspecting the wood decking underneath, and building the roof back up component by component. If you’re deciding between patching and replacing, our Roof Replacement & Installation page walks through both options in detail. But if you’ve been told your roof is near the end of its life, the math usually points one direction.
When You Need Full Roof Replacement
Not every leak means the whole roof has to go. But in Woodland Hills, where summer temperatures routinely pass 100 degrees and the sun beats down on asphalt shingles for months at a stretch, roofs age differently than they do at the coast. UV exposure breaks down shingles faster here, especially on south- and west-facing slopes. Here are the signs that point to full replacement rather than another repair:
- Your roof is 20 to 25 years old. Most asphalt shingle roofs in the San Fernando Valley last two decades under normal conditions. If your home was built or reroofed in the early 2000s, you’re in the replacement window now.
- Shingle granules are showing up in your gutters. Those granules are the UV shield. When they start washing away, the asphalt beneath dries out and cracks. This is common in neighborhoods like Walnut Acres and Vista de Oro, where mature tree coverage offers no protection on exposed roof planes.
- You see curling, cupping, or missing shingles. Flat-looking sections that start lifting at the edges are past the point of repair. You’ll often see this first on the side of the house that faces the afternoon sun.
- Daylight is visible in the attic. If you can see light streaming through the roof boards from inside your attic, water can get in too. Small spots can sometimes be repaired, but widespread light penetration means the roof system as a whole is failing.
- Leaks in multiple places. One leak is usually a flash or shingle failure. Three leaks in three different rooms usually means the underlayment and decking have been compromised in multiple areas, and no single repair will hold.
- Water damage on interior ceilings with no storm event. In Woodland Hills, the rain comes in bursts. If you’re getting interior staining after routine winter rains, not a freak storm, the roof’s waterproofing layer is gone in at least one section.
A trained eye can tell the difference between end-of-life shingles and localized damage in about twenty minutes. We’ll tell you straight whether repair will get you through another few seasons or whether replacement is the better use of your money.
Our Full Roof Replacement Process
Before you agree to anything, you’ll know exactly what we’re going to do, what it costs, and who will be on your property. Here’s how a full replacement with Mercer Roofing Co Woodland Hills works:
- Inspection and honest assessment. We get on the roof, check the shingles, flashing, underlayment, and attic ventilation, and give you a straight answer about whether the roof needs replacing or can be repaired. If repair is the right call, we say so. Grant Whitlock built this business on giving homeowners the real answer, not the more expensive one.
- Written estimate with line-item pricing. You get a written price before any work starts. That includes tear-off, dump fees, underlayment, shingles, flashing, vents, and everything else. No surprises on the invoice because the invoice matches the estimate.
- You choose the shingle. We work with manufacturer-recognized brands including GAF, Atlas, and Boral. Each has different looks, warranties, and price points. We’ll show you samples and explain the trade-offs in plain English so you can pick based on your budget and what the roof actually needs, not a sales pitch.
- You meet the technician before they arrive. This is the part most roofers skip. We send you the name and photo of the technician handling your project before they come to your door. When they arrive, they’re in a clean, marked uniform and they show you a photo ID badge. This is the Threshold Verified standard, and every Mercer location is contractually held to it. If someone can’t show you an ID, they don’t belong on your property.
- Tear-off and deck inspection. The old roof comes off down to the decking. We inspect every sheet of plywood or OSB and replace any section that’s rotted, delaminated, or water-damaged. This is the step that separates a good replacement from a cheap one, because the decking is what your new roof attaches to.
- New underlayment, flashing, and shingles. We install the new roof in layers: synthetic underlayment as the secondary water barrier, new flashing at every penetration (chimneys, vents, skylights, valley lines), then the shingles themselves. Every layer is installed per manufacturer specs, which is required to keep the shingle warranty valid.
- Cleanup and final walkthrough. We remove all debris, run a magnetic sweeper over the ground for loose nails, and walk you through the finished roof. You get a written guarantee covering the work for 365 days. If something’s not right within that year, we make it right, no charge.
Full Roof Replacement Pricing in Woodland Hills
Roof replacement pricing depends on roof size, pitch, shingle choice, decking condition, and access. A small single-story home with a simple gable roof will land at the lower end. A two-story home with a steep pitch, multiple valleys, and old decking that needs replacing will run higher. Here’s a realistic range for Woodland Hills as of 2025:
| Line Item | Typical Range in Woodland Hills |
|---|---|
| Tear-off and disposal of existing roof | $1,800 – $3,500 |
| Synthetic underlayment | $800 – $1,600 |
| Architectural asphalt shingles (material only) | $4,500 – $9,000 |
| Decking replacement (per sheet, if needed) | $75 – $125 per sheet |
| Flashing replacement (chimney, valleys, drip edge) | $700 – $2,200 |
| Labor and installation | $5,000 – $11,000 |
| Total for average Woodland Hills home | $13,000 – $28,000 |
What pushes the price up:
- Roof size. A 1,200-square-foot home in the flats around Oxnard Street costs less than a 2,800-square-foot home in the hills south of Ventura Boulevard. More roof equals more material and more labor.
- Pitch. Steep roofs mean slower, more careful work and more safety equipment. A 6/12 pitch is standard. A 9/12 or higher adds to the labor cost.
- Decking condition. If the plywood under your shingles has been getting wet for years, expect to replace a portion of it. We won’t know how much until the old roof comes off, and the estimate will tell you exactly what each replacement sheet costs.
- Shingle brand and line. Atlas and GAF offer excellent architectural shingles in the mid-price range. Boral offers stone-coated steel and tile profiles that cost more up front but last longer and hold up better under Woodland Hills sun exposure.
- Permit fees. The City of Los Angeles requires a building permit for full roof replacement in Woodland Hills. We handle the permit process, and the fee is included as a line item on your written estimate.
Every full replacement estimate from Mercer Roofing Co Woodland Hills is free. You get a written price before any work starts. If the number changes, we tell you why before you commit, not after the invoice arrives.
FAQs – Full Roof Replacement
How much does a full roof replacement cost in Woodland Hills?
A full roof replacement in Woodland Hills typically costs between $13,000 and $28,000 for homes with asphalt shingle roofs, with the final number driven by roof size, pitch, shingle brand, and decking condition. Call (341) 217-2677 for a free written estimate with line-item pricing specific to your home.
How long does a full roof replacement take?
Most full roof replacements in Woodland Hills take 3 to 5 days from tear-off to final cleanup, barring weather delays or significant decking replacement. We’ll give you a day-by-day schedule in writing before work begins, and we show up on the days we say we will.
Is it cheaper to repair or replace my roof?
Repair is always cheaper in the short term, but if your roof is past 20 years old with failing shingles in multiple areas, replacement costs less per year of service life. A $1,500 repair on a roof that needs $18,000 of replacement inside two years is money spent twice. We’ll give you an honest recommendation either way.
Can you replace my roof the same week?
We schedule most full replacements within 7 to 10 days of the signed estimate, and we’ll lock in your dates in writing. Call (341) 217-2677 and a live person will tell you the soonest available start date. No voicemail, no callback form.
Do you match contractor estimates?
We don’t match estimates, because price matching means cutting a corner somewhere. What we do instead is give you a written, line-item price and honor it. The estimate you approve is the price you pay.
Why Woodland Hills Homeowners Choose Mercer Roofing Co
What makes a roofer trustworthy isn’t just the work. It’s the moment you open your front door to a stranger and wonder if you made the right call. That’s the problem we solve before it ever happens. Before a Mercer technician sets foot on your property, you receive their name and photo. When they arrive, they’re in a clean, marked uniform, and they present a photo ID badge before they do anything else. That’s the Threshold Verified standard, and it’s the reason homeowners who feel uneasy about strangers on their property call us first.
The work itself is backed by the 365-Day Done Right Promise. If the installation is not right within a year, we make it right. In writing, on every job. No arguing about who was at fault. No chasing down a subcontractor. You call (341) 217-2677, a live person answers, and we schedule the fix.
We were founded in 2000 as part of the Threshold Group family of home-service companies. Every Mercer location is independently owned and operated, and every one is held to the same Threshold Verified requirements: background-checked, identity-verified technicians in uniform with photo ID. The name on the truck matches the person at your door, and the person at your door is someone we’d trust at our own homes.
For homeowners in Woodland Hills, from the flats of Warner Center to the hill streets above Topanga Canyon Boulevard, a new roof is a major investment. Knowing the exact price, the exact schedule, and the exact person doing the work makes that investment feel like what it should: protection, not a gamble.
Get a Free Full Roof Replacement Estimate
If your roof is at the end of its life, or if you’ve been told it is and want a second opinion you can trust, call (341) 217-2677. You’ll get a live person, a free inspection, and a written price with every line item listed. No surprises, no pressure, and no work starts until you say go.
Written by Grant Whitlock, Owner at Mercer Roofing Co Woodland Hills, serving Woodland Hills.