New Construction in Thousand Oaks, CA

New Construction in Thousand Oaks, CA

New construction roofing in Thousand Oaks means installing a roof on a brand-new home build, an addition, or a detached structure like a garage or ADU. We handle new-construction roofing from bare decking to finished ridge cap, and a typical Thousand Oaks new-construction roof runs between $11,000 and $28,000 depending on size, pitch, and shingle choice. If you’re mid-build or planning one, call us at (805) 309-3314 and we’ll give you a written price before any work starts.

This page covers what new-construction roofing involves, what it costs in Thousand Oaks, and why Mercer Roofing Co Thousand Oaks is set up differently from other roofers when it comes to who shows up at your door. If you’re also weighing a full roof replacement on an existing home, our Roof Replacement & Installation guide walks through that separately.

Key Takeaways

• New construction roofing in Thousand Oaks typically costs $11,000 to $28,000 for a standard single-family home.
• We install GAF, CertainTeed, Owens Corning, and Atlas shingle systems, plus tile where the build calls for it.
• Every new-construction roof gets a written guarantee for 365 days under the Done Right Promise.
• You’ll know your technician’s name and see their photo before they arrive. They badge in with photo ID at the door.
• Call (805) 309-3314 for a free estimate and a written price before any work begins.

When You Need New Construction

New construction roofing isn’t a repair job. It’s a from-scratch install on a structure that has never had a roof before. In Thousand Oaks, we see it most often in these situations:

• You’re building a new home. The framing is up, the decking is on, and you need a full roofing system installed before the building can be weatherproofed. This is the classic new-construction roof in developments around Newbury Park, Westlake, and the Conejo Valley.
• You’re adding a room or second story. An addition means tying a new roof plane into the existing one. We see this a lot in older Thousand Oaks neighborhoods like Wildwood and Lynn Ranch, where homes built in the 1960s and 1970s get expanded rather than replaced.
• You’re building a detached ADU or garage. Thousand Oaks zoning allows accessory dwelling units in most residential zones, and every ADU needs a roof. These are smaller jobs, usually 300 to 800 square feet, but they still need proper underlayment, flashing, and ventilation done right.
• You’re replacing a roof down to the decking. Sometimes a re-roof reveals decking that’s too far gone to reuse. At that point it’s functionally a new-construction roof: new decking, new underlayment, new shingles, new flashing. In Thousand Oaks, where summer heat bakes decking and winter rains test every seam, we recommend full deck replacement more often than homeowners expect.
• You’re a builder or general contractor who needs a roofing sub. We work with GCs on spec homes and custom builds throughout the 91360 and 91362 zip codes, and we hit the timelines you set.

Our New Construction Process

Here’s how a new-construction roof goes with Mercer Roofing Co Thousand Oaks, step by step.

1. Site walk and measurements. We come out, measure the decking, check the pitch, and look at the plans if you have them. We note any details that affect the roof: valleys, dormers, skylight openings, chimney chases, and where the roof meets stucco or siding.
2. Written price. Before any work starts, you get a written price with the full scope: decking, underlayment, shingles or tile, flashing, ridge vent, drip edge, and any custom metal work. No verbal estimates. No surprises on the invoice later.
3. Decking inspection and prep. If the framers installed the decking, we check it for gaps, raised nails, and any boards that need replacing or re-nailing. We want the decking tight and flat before the underlayment goes down.
4. Underlayment and flashing. We install a synthetic or felt underlayment over the full deck, then flash every penetration: vents, pipes, skylights, and any wall intersections. Flashing is where most roofs fail, and in Thousand Oaks, where Santa Ana winds drive rain sideways into every seam, we over-flash rather than under-flash.
5. Shingle or tile installation. We install the roofing material you chose, from GAF Timberline HDZ architectural shingles to CertainTeed Landmark, Owens Corning Duration, or Atlas Pinnacle. For tile roofs, we work with Boral concrete and clay tile. Every course is nailed to manufacturer spec so the warranty stays valid.
6. Ridge cap and final inspection. We cap the ridges and hips, install the ridge vent, and walk the whole roof twice: once for installation quality, once for cleanliness and water-tightness. We photograph everything and walk you through it before we call the job done.

New Construction Pricing in Thousand Oaks

New construction roofing in Thousand Oaks costs more than a simple re-roof because you’re paying for the full system from the deck up, not just a shingle overlay. Here’s what you can expect in this market:

Project	Typical Cost in Thousand Oaks
ADU or detached garage roof (300 – 800 sq ft)	$4,500 – $9,500
Standard single-family home (1,800 – 2,800 sq ft)	$11,000 – $19,000
Larger or complex home (3,000+ sq ft, steep pitch, multiple valleys)	$19,000 – $28,000+
Tile roof (Boral concrete or clay) on a standard home	$24,000 – $42,000

What moves the number:

• Roof pitch. Steep roofs, common in Thousand Oaks hillside builds around Sunset Hills and the North Ranch area, take longer and require more fall protection. That adds labor cost.
• Decking condition. If the framers put down decking, we may need to correct it. If we supply and install decking, that’s a separate line item, usually $2.50 to $4.00 per square foot in this area.
• Underlayment type. Standard synthetic underlayment is included. If your build requires a self-adhered ice-and-water shield for critical areas, or if you want a premium high-temp underlayment for better attic performance in Thousand Oaks summers, that adds to the quote.
• Shingle vs. tile. Architectural shingles are the value choice. Concrete tile adds weight, requires specific decking and engineering, and runs two to three times the shingle price.
• Flashing complexity. A simple gable roof needs basic flashing. A roof with dormers, skylights, crickets, and wall intersections needs custom metal work. Every penetration is a labor hour and a potential leak point if done wrong.

We give you a written price before any work starts. That’s our standing policy on every job, new construction included. Call (805) 309-3314 and we’ll come out, measure, and hand you a written number. The estimate is free and there’s no obligation.

Why Mercer Roofing for New Construction in Thousand Oaks

There are plenty of roofers in the Conejo Valley. Here’s what we do differently, and what we think you should look for in any roofer on a new build.

You’ll know who’s at your door before they knock

Before your technician arrives, we send you their name and photo. When they show up, they’re in a clean, marked uniform and they’ll show you a photo ID badge at the door. That’s the Threshold Verified standard, and every Mercer technician is background-checked and identity-verified before they ever step onto your property. If you’re managing a build while you’re at work, or if you’re home alone with young kids, this matters. You should never have to guess who’s walking up your driveway.

Written price, written guarantee

Every new-construction roof we install comes with a written price before work starts and a written guarantee when it’s done. Under the 365-Day Done Right Promise, if anything isn’t right within the first year, we come back and make it right. No fine print about what “right” means. If a repair fails, the second visit is free.

We use the shingle brands Thousand Oaks builders spec

We install GAF, CertainTeed, Owens Corning, and Atlas shingle systems, and Boral tile for the Spanish and Mediterranean builds common around Thousand Oaks. When you choose one of these, we install to manufacturer spec so your warranty is enforceable, not voided by shortcut nailing.

A live person answers, 24/7

Building schedules shift. Rain comes in. You need to reach someone at 7 a.m. on a Saturday. When you call (805) 309-3314, a real person answers. Not a voicemail. Not a call-back form. A person who can help.

New Construction Roofing and Thousand Oaks Building Code

Thousand Oaks enforces California Building Code Title 24, which includes specific requirements for roofing underlayment, ventilation, and fire resistance. The city lies in a Wildland-Urban Interface zone in many hillside neighborhoods, which means some new builds in areas like Lang Ranch and North Ranch require Class A fire-rated roof assemblies. That affects shingle choice and sometimes underlayment specs. We know what the local inspectors look for because we’ve passed their inspections on homes across the Conejo Valley. If your build has WUI requirements, we’ll tell you at the estimate stage, not after the inspector flags it.

FAQs – New Construction

How much does a new construction roof cost in Thousand Oaks?

A new construction roof in Thousand Oaks typically costs between $11,000 and $28,000 for a standard single-family home, with ADU and garage roofs running $4,500 to $9,500. Tile roofs run higher. The final number depends on square footage, pitch, underlayment spec, and flashing complexity. Call (805) 309-3314 for a free estimate and a written price.

How long does a new construction roof take?

Most standard new-construction roofs in Thousand Oaks take 3 to 7 working days from decking prep to final inspection. Tile roofs take longer, usually 7 to 12 days. Weather can stretch that, especially in January and February when rain interrupts work. We’ll give you a start date and a realistic completion window in your written estimate.

Do you work with general contractors on new builds?

Yes. We work with GCs and custom home builders across Thousand Oaks, including projects in Newbury Park, Westlake Village, and the Santa Rosa Valley. We hit the timelines in your build schedule, and we carry the documentation your project needs: written scope, written price, and a written guarantee on completion.

Is it cheaper to do new construction roofing myself or hire a roofer?

Roofing a new build yourself is almost never cheaper when you account for materials at retail price, tooling, fall-protection gear, and the cost of redoing what goes wrong. It’s also genuinely dangerous. Steep-pitch and two-story work kills experienced roofers every year; a homeowner working without proper tie-off is taking a risk that isn’t worth a few thousand dollars. We recommend a licensed, insured roofer for any new-construction roofing. Call (805) 309-3314 and we’ll give you a written price so you can compare real numbers.

Does Mercer Roofing offer a warranty on new construction roofs?

Yes. Every new-construction roof we install is covered by our 365-Day Done Right Promise in writing. If anything isn’t right within the first year, we come back and make it right. If a repair fails, the second visit is free. Shingle manufacturers also carry their own material warranties, which stay valid because we install to their specs.

Get a Written Price for Your New Construction Roof in Thousand Oaks

If you’re building in Thousand Oaks, Newbury Park, Westlake, or anywhere in the Conejo Valley, we’ll come out, measure the roof, and give you a written price before any work starts. You’ll know exactly what it costs, what we’re installing, and who will be on your roof. Call (805) 309-3314 now, or reach out through our home page to schedule a site walk. A live person answers, 24/7.

Written by Grant Whitlock, Owner at Mercer Roofing Co Thousand Oaks, serving Thousand Oaks.