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Tamko Home Additions & ADU: The Miami Owner’s Guide
If you’re planning a home addition or ADU in Miami and want Tamko roofing, siding, or waterproofing products on the project, we install them. A full addition runs $53,100 to $153,400 in this market, depending on square footage, foundation work, and finish level. Most homeowners discover they need help when their existing contractor can’t source Tamko materials, or when a previous addition starts showing water intrusion at the roofline and they want the next one done right the first time.
We’re Sawyer Remodel Miami, and we’re an independent general contractor, not a Tamko dealer or affiliate. What we do is build additions and ADUs that actually hold up to Miami’s humidity, hurricane season, and relentless sun. Luca Romano has been running jobs in South Florida long enough to know that the difference between a 10-year addition and a 30-year one usually comes down to what goes on before the drywall does.
Good work doesn’t need a sales pitch. These numbers are real, and so is the process.
Key Takeaways
- Miami home additions run $53,100 to $153,400; ADUs run $106,200 to $259,600 when built as detached units.
- Tamko products perform differently in Miami’s climate than in drier markets, underlayment and flashing details matter more than shingle brand alone.
- We write the full price before work starts. The number we quote is the number on the invoice.
- Tamko materials are ordered per project, we don’t keep them sitting in a warehouse, which means pricing is locked and nothing sits in the Miami heat for months before install.
- Every job carries our 365-Day Done Right Promise in writing.
Styles & brands we work with
Which Tamko Products We Use on Miami Additions
Tamko makes a broad line, but for Miami home additions and ADUs, the relevant products are their architectural shingles (like the Heritage series), their waterproofing membranes, and their composite decking on elevated or second-story additions. The Heritage line is what we recommend for most Miami roofs on new additions: it’s a fiberglass-asphalt architectural shingle rated for 130 mph wind when installed with Tamko’s six-nail pattern and proper starter strip.
The compatibility gotcha most Miami homeowners run into: your original house roof might be a different brand, and matching old shingles to new will not work. Color fade from Miami’s UV exposure means the deck looks mismatched within two years. If your addition roof ties into an existing roof, plan to re-roof both together or live with a visible seam. We tell every client this before they sign.
On the aftermarket vs. OEM question: there is no functional aftermarket equivalent for Tamko shingles. You either install Tamko or you install another brand. Aftermarket products exist for underlayment and flashing, and we use certain ones when they outperform OEM spec in Miami’s wet-dry-wet cycle. But the shingles themselves come from Tamko, period.
Signs Your Existing Addition Wasn’t Built for Miami’s Climate
Most of our Tamko-related work is fixing additions built by someone who didn’t account for South Florida weather. Here’s what we see on service calls before a teardown or fix:
- Water stains at the roofline corner where the addition meets the original house. This is almost always a flashing failure. The joint where two roofs meet is the weakest point, and in Miami’s rain, a bad flashing job shows itself within two rainy seasons.
- Shingle granules collecting in your gutters. Miami’s UV accelerates granule loss on any asphalt shingle, but early, heavy loss on a roof under 10 years old usually means the shingles were installed over a bad deck or without proper ventilation.
- Swelling or bubbling on interior drywall at the addition’s exterior walls. That’s moisture wicking behind the siding or stucco. It means the water-resistant barrier failed. Once you see it inside, the rot outside is already there.
- Windows or doors in the addition that stick after rain. Miami humidity plus poor structural drainage means the framing is moving. This is more than an annoyance, it signals an envelope problem.
- Attic heat that feels like a sauna even in January. No ridge vent, no soffit airflow. In Miami, an unvented addition attic will cook your HVAC and shorten shingle life dramatically.
If you’re seeing any of these on an addition that’s under a year old, call us at (850) 801-8046. That’s a construction defect, and it shouldn’t be your problem to live with.
See the difference
Before
After
Before
After
Before
AfterWhat a Miami Home Addition or ADU Costs, Installed
| Project Type | Installed Price Range (Miami) |
|---|---|
| Home Addition (bedroom, family room, etc.) | $53,100 – $153,400 |
| ADU Construction (detached) | $106,200 – $259,600 |
| Garage Conversion to Living Space | $35,400 – $94,400 |
For the home addition range, the drivers are square footage, foundation type, whether you’re matching an existing roof or doing a standalone structure, and the finish package inside. A simple 400-square-foot ground-floor bedroom addition on a slab with a new Tamko Heritage roof over it starts near $53,000 when you keep the interior at builder grade. A second-story addition with structural reinforcement, a new HVAC zone, and a full bathroom pushes toward $153,000 and beyond.
Every quote includes line-item parts and labor. You see what the Tamko materials cost, what the framing costs, what the finishes cost. There’s no mystery allowance line. The price you approve is the price you pay, and our 365-Day Done Right Promise covers the work for a full year after we close the permit.
Can You DIY a Miami Home Addition? No. And That’s the Best Advice You’ll Get Today.
We’re not going to pretend there’s a homeowner-safe version of building an addition. There isn’t. This is structural framing, roof tie-ins, window and door flashing, electrical, plumbing, and Miami-Dade hurricane codes. A mistake on a shingle nail pattern might leak in five years. A mistake on a load path can fail in the next storm. Luca went to trade school for this and runs jobs under Miami’s permitting regime for a reason.
What you can do before you call: pull your property survey, check your zoning for ADU allowances, and decide on a rough square footage. That’s real homework that saves time. After that, let us handle the rest. Call (850) 801-8046 and we’ll walk the site, lay out the numbers, and give you a written price. No deposit, no pressure, just a plan.
FAQs
Tamko Heritage shingles carry a 30-year limited warranty, but in Miami’s UV and storm conditions, realistic life is 18 to 22 years with proper ventilation and installation. Poor attic ventilation cuts that to 12 to 15 years. Call (850) 801-8046 if you want us to assess what’s on your existing roof before you build.
Yes, if the framing is sound. Most failures are flashing, waterproofing, or ventilation problems, and those are correctable without tearing down the structure. We’ll tell you honestly if repair is the right move or if you’re throwing money at a bad frame. Call (850) 801-8046 for a free on-site assessment.
Plan on 4 to 8 months for a ground-floor addition and 6 to 12 for a full ADU or second-story project. The permitting timeline in Miami-Dade and Coral Gables varies by municipality, and we pull permits on every job. We’ll give you a schedule with the quote, and we update you throughout against The Relay Standard: live arrival times, photo updates, and a written price before any work begins.
No, and we’d be suspicious of anyone who tells you they do. Tamko roofing and waterproofing products are ordered per project and shipped fresh. Materials stored in un-air-conditioned Miami warehouses for months degrade. We order for your job, it arrives within days of install, and it goes on the structure immediately. We also work with KraftMaid, Cambria, and Silestone on the interior side of additions.
Get a Written Price Before You Commit
If you’re planning a Tamko addition or ADU in Miami, the first step is a free estimate. Call (850) 801-8046 to schedule a site walk with Luca and the crew. You’ll get a line-item price, a schedule, and a straight answer on what your project will actually cost.
Written by Luca Romano, Owner & Lead Contractor, Sawyer Remodel Miami at Sawyer Remodel Miami, serving Miami and nearby areas.
