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AfterNew Construction Roofing in San Diego, CA
New construction roofing in San Diego means installing a roof system on a brand-new home, addition, or outbuilding, from bare sheathing to finished ridge. A properly installed new construction roof in coastal San Diego typically runs $7 to $12 per square foot for architectural asphalt shingles, with most full-home installs landing between $14,000 and $28,000 depending on roof complexity, pitch, and material grade. If you’re building in San Diego and need a roofing crew that shows up on schedule, badges at the door, and puts the entire price in writing before the first nail goes down, call Mercer Roofing Co San Diego at (619) 810-5520.
New construction is the cleanest version of our work at Mercer Roofing Co San Diego. There’s no tear-off, no hidden rot, and no guessing what’s under the old shingles. What there is: a blank deck, a set of plans, and a San Diego building inspector who expects the job done to code. This page covers how new construction roofing works, what it costs in San Diego, and how we approach it differently than most crews. For the full scope of what we install, see our Roof Replacement & Installation in San Diego page.
If you’re a homeowner acting as your own general contractor, or you’re working with a builder and want your own roofing crew on the job, you’ll want specifics. We give them to you. Grant Whitlock leads Mercer Roofing Co San Diego, and every new construction roof we install carries the same written guarantee and 365-Day Done Right Promise as every repair and replacement we do.
When You Need New Construction Roofing
New construction roofing isn’t just for full custom homes. In San Diego, we install new roofs on a wide range of projects. Here are the situations we see most often:
- You’re building a new home from the ground up. Whether you’re in Rancho Bernardo, Point Loma, or a hillside lot in La Mesa, the roof is one of the first weather barriers to go on after framing. Your builder may include roofing in the contract, or you may hire your own crew to keep costs and quality visible.
- You’re adding a second story or a major addition. Adding square footage in neighborhoods like North Park or Clairemont often means tying a new roof plane into the existing one. Getting the flashing and transitions right at the tie-in is where we see most failing roofs originate.
- You’re building an ADU or a detached granny flat. San Diego’s ADU boom is real, and those 400 to 1,200 square foot conversions need a roof that meets current Title 24 energy standards. We install a lot of these in Encanto, City Heights, and the College Area.
- You’re putting up a detached garage, workshop, or pool house. A new outbuilding needs a roof that matches the main house, or at least doesn’t fight it. We keep material profiles consistent so the property looks intentional, not patched together.
- Your builder’s roofing sub dropped the ball or walked off the job. It happens more than you’d think. We step in mid-build to finish a roof that was started wrong, torn off, or abandoned. Taking over mid-project is something we’re comfortable with, and we document everything we find.
- You, as the owner, want a second set of eyes on the roof spec before you sign off. We’ll review the roof section of your plans and give you a written line-item price for materials and labor, so you can compare against the builder’s number with real data in hand.
If any of these sound like your project, call (619) 810-5520. A live person answers, day or night, and we’ll talk through your timeline and plans before you commit to anything.
Our New Construction Process
Here’s exactly how a new construction roof goes with Mercer Roofing Co San Diego. Every step is in writing, and you’ll always know who is on your property before they arrive.
- Plans review and walkthrough. We look at your architectural plans, roof plan, and any structural notes. If framing is up, we walk the roof deck with you or your builder and check sheathing, pitch, valleys, and penetrations. We flag anything that will cause trouble later – before it costs money.
- Written line-item proposal. You get a written price that breaks out materials, labor, underlayment, flashing, ventilation, and any code-required upgrades. No work starts until you approve that number. If the scope changes, the price changes in writing first – never after the fact.
- Material selection and ordering. We install manufacturer-recognized shingle systems from GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. We’ll show you physical samples and explain what each grade offers for San Diego’s sun and salt air, so you’re choosing on facts, not vibes.
- Scheduling and technician notification. Before our crew arrives, you get the name and photo of the lead technician who will be on your property. Every person on the job is background-checked, identity-verified, and arrives in a clean, marked uniform with a photo ID badge. That’s the Threshold Verified standard, and it’s non-negotiable at Mercer Roofing.
- Installation. We install the full system: underlayment, ice and water shield in valleys and at eaves where San Diego code calls for it, drip edge, flashing at every penetration and wall intersection, proper nailing pattern per the manufacturer’s spec, ridge ventilation, and the shingle system itself. We keep the job site clean and secure at the end of every day.
- Final inspection and walkthrough. We walk the finished roof with you or your builder, open every question, and confirm the work matches the written proposal. Then you get your written guarantee, covering the full installation for 365 days under the Done Right Promise. If anything isn’t right within a year, we make it right, and a second visit is always free if a covered repair fails.
This process is the same whether we’re roofing a 4,000 square foot custom build in Del Cerro or a 600 square foot ADU in Normal Heights. Same written price, same badge at the door, same guarantee.
New Construction Roofing Pricing in San Diego
New construction roofing in San Diego typically costs between $7 and $12 per square foot for architectural asphalt shingles. That range covers most single-family homes and ADUs in the county, with the final number driven by roof pitch, number of planes, valleys, penetrations, and the shingle grade you choose.
Here’s how the numbers break down for a typical San Diego new construction project:
- Architectural asphalt shingles (the workhorse): $7 to $10 per square foot installed. This is the most common choice for new builds across San Diego, from Otay Mesa to Mira Mesa.
- Designer or high-definition asphalt shingles: $9 to $12 per square foot installed. Heavier, more dimensional profiles and extended warranties push the price toward the upper end.
- Underlayment and weather barrier: Included in the per-square-foot price above, but worth knowing: we use synthetic underlayment as standard, not builder-grade felt. In San Diego’s coastal zones, we add ice and water shield at eaves and valleys where code or manufacturer spec requires it.
- Flashing and penetrations: Included. Every pipe boot, skylight curb, chimney, and wall intersection gets flashed with galvanized or powder-coated metal, never caulk-and-hope.
- Ventilation: Included. Ridge vent or box vents sized to the attic volume, so the roof doesn’t cook itself in an East County summer.
- ADU or small detached structure roof: $4,500 to $9,000 total for most 400 to 800 square foot ADUs in San Diego.
What makes a new construction roof cost more or less in San Diego? Roof pitch is the biggest driver. A 3:12 walkable roof in Chula Vista is faster and safer to work on than a 7:12 cut-up roof in a hillside development in Scripps Ranch. Number of penetrations matters too. Every plumbing vent, skylight, and exhaust fan opening is a flashing detail and a potential leak point if done wrong. Valleys, hips, and dormers add material and labor. And the shingle grade itself can swing the price by 30 to 40 percent.
We give a written price before any work starts, every time. If you want to know exactly what your project will cost, call (619) 810-5520. We’ll review your plans, walk the structure if it’s up, and hand you a line-item proposal you can hold us to. The estimate is free.
FAQs – New Construction Roofing in San Diego
How much does new construction roofing cost in San Diego?
New construction roofing in San Diego typically costs $7 to $12 per square foot for architectural asphalt shingles, so a 2,000 square foot roof runs roughly $14,000 to $24,000. Your actual price depends on roof pitch, the number of valleys and penetrations, and the shingle brand and grade you pick. Call (619) 810-5520 for a written, line-item quote on your specific plans – free, no obligation.
What’s the best roofing material for new construction in San Diego’s climate?
Architectural asphalt shingles are the smart default for most San Diego new construction because they handle sun, salt air, and the occasional heavy rain without the weight or cost of tile. Within that category, brands like Owens Corning, IKO, and Atlas all offer high-wind-rated profiles that work well in San Diego’s coastal and inland microclimates. We’ll show you physical samples and explain the trade-offs before you choose.
Can you take over a new construction roof that another crew started?
Yes, we take over mid-build roofing projects in San Diego regularly. We inspect what’s already installed, document the condition, and give you a written price to complete or correct the work to code. If the previous crew left underlayment exposed, flashing missing, or nailing patterns wrong, we fix it before we build on top of it. Call (619) 810-5520 and we’ll schedule a walkthrough.
Do you work directly with homeowners or only with general contractors?
We work with both. Many San Diego homeowners acting as their own GC hire us directly for the roof portion of a new build or addition. We also work under general contractors who want a roofing crew that shows up with a written scope and badged technicians. Either way, you get the same written price, the same Threshold Verified technician standard, and the same 365-Day Done Right Promise.
Why San Diego Homeowners Choose Mercer Roofing for New Construction
Most roofing companies treat new construction as commodity work: show up, nail shingles, leave. We don’t. A new construction roof is the only chance to get the weather barrier right from day one, and the details that protect a home for 30 years are the ones most crews rush through. Flashings, underlayment overlap, nail placement, ventilation – these are the unglamorous parts of roofing that determine whether your new home stays dry in a January Pineapple Express or a rare San Diego gully washer.
We also understand something that matters deeply to a lot of San Diego homeowners: letting strangers onto your property is a real concern. If you’re home alone during the build, if you’ve got young kids in the house, or if you simply want proof of who is walking up your driveway, Mercer Roofing Co San Diego gives it to you. Every technician is background-checked and identity-verified under the Threshold Verified standard. Before our crew arrives, you get the lead technician’s name and photo. They badge in with a photo ID at the door. That’s not a marketing line; that’s the operating standard Grant Whitlock holds this location to, backed by the Threshold Group’s contractual quality framework, which Mercer Roofing Co San Diego has been part of since the company was founded in 2000.
Your new construction roof should feel like the least stressful part of the build. That’s the bar we aim for. Written price before work starts, written guarantee on every installation, 365 days of coverage under the Done Right Promise, and a real person answering the phone at (619) 810-5520 whenever you call.
Get a Written Quote for Your San Diego New Construction Roof
If you’re building in San Diego, you want a roofing number you can trust before the framing even goes up. Call Mercer Roofing Co San Diego at (619) 810-5520. We’ll talk through your project, review your plans if you have them, and give you a written price that covers everything – materials, labor, flashing, ventilation, and the guarantee. No surprises on the invoice, ever. And when our crew shows up, you’ll already know exactly who is coming to the door.
Written by Grant Whitlock, Owner at Mercer Roofing Co San Diego, serving San Diego.