Asphalt shingles cover about 80% of American homes, and for good reason: they’re affordable, come in many styles, and last for decades. If you’re planning a new shingle roof, this guide explains what shapes the cost, how installation works, and how to choose the right shingle.
A shingle roof’s price isn’t one flat number. It’s built from your shingle grade, your roof’s size and shape, whether the old roof is torn off, and your local labor and code rules. That’s why two homes on the same street can get very different quotes. Understanding these pieces helps you read an estimate and plan with no surprises.
Below, we break down what drives the cost, how a pro installs a shingle roof, the 3-tab vs. architectural choice, and how long shingle roofs last.
What affects the cost of a shingle roof?
The biggest cost drivers are the shingle grade, roof size, roof pitch and shape, tear-off, and your location. Each one moves the total up or down. Here’s how.
- Shingle grade. Basic 3-tab costs the least. Architectural shingles sit in the middle. Luxury shingles cost the most. Moving up a grade raises the price but adds years of life.
- Roof size. More square footage means more material and more labor hours.
- Pitch and shape. Steep roofs and roofs with many valleys, dormers, and skylights take more time and skill, which raises labor.
- Tear-off. Removing the old roof adds to the cost. Most LA homes allow only two layers before a full tear-off is required.
- Location. Labor and material prices run higher in big metros like Los Angeles.
- Permits and code. LA requires a permit for a re-roof, plus the energy and fire rules covered below.
| Cost driver | Why it changes your price |
|---|---|
| Shingle grade | Higher grades cost more but last longer |
| Roof size | More area means more material and labor |
| Pitch & complexity | Steep or cut-up roofs take more time |
| Tear-off | Removing old layers adds labor and disposal |
| Location & code | LA labor rates and code rules add cost |
Because every roof differs, the only accurate number comes from a written quote. To weigh a new roof against a repair, see our guide on when to repair or replace your roof.
How is a shingle roof priced by the square?
Roofers price and measure your roof in “squares.” A square means 100 square feet of roof, not a single square foot. Your estimate will list the number of squares, so it helps to know the term.
Shingles are also sold in bundles. About three bundles cover one square, and each bundle covers roughly 33 square feet. When you compare quotes, check that each one counts the same number of squares and the same shingle grade. That’s how you compare fairly.
For example, if two quotes look far apart, one may be pricing 3-tab and the other architectural, or one may include tear-off while the other doesn’t. Reading by the square shows you why.
How is a shingle roof installed?
A professional shingle install follows a clear order. Each step protects the one after it, which is why proper installation matters more than the shingle brand.
- Inspect and measure the roof in squares, and pull the permit.
- Protect the property with tarps over landscaping and walls.
- Tear off the old shingles down to the wood deck.
- Inspect the deck and replace any rotted or soft wood.
- Install drip edge and underlayment, plus a waterproof layer in valleys and around edges.
- Lay shingles from the bottom up, starting with a starter strip, and add flashing around the chimney, vents, and valleys.
- Install ridge vents and ridge caps along the peak.
- Clean up with a magnetic nail sweep, then pass the final city inspection.
Some homeowners search how to do this themselves. A DIY shingle roof can work on a small shed, but a full home roof is steep, heavy, and risky, and a mistake can void your warranty or fail inspection. See the full project flow in our step-by-step roof replacement guide.
3-tab vs. architectural shingles: which is better?
This is the main choice you’ll make, and it also affects your cost. Architectural shingles are the better pick for most homes, and 3-tab makes sense mainly for rentals or a home you’ll sell soon.
- 3-tab shingles are a single flat layer with a uniform look. They cost the least, resist wind up to 60 mph, and last 15 to 20 years.
- Architectural shingles are thicker, laminated layers with a rich, dimensional look. They resist wind up to 110 to 130 mph and last 25 to 30 years.
| Feature | 3-tab | Architectural |
|---|---|---|
| Look | Flat, uniform | Layered, dimensional |
| Wind rating | Up to 60 mph | Up to 110 to 130 mph |
| Lifespan | 15 to 20 years | 25 to 30 years |
| Relative cost | Lowest | Modestly higher |
| Best for | Rentals, quick resale | Most homes |
Architectural shingles cost a little more but last far longer and stand up to LA’s Santa Ana winds better. For most homeowners, they’re the smarter long-term value.
How long do shingle roofs last?
A shingle roof lasts 15 to 30 years, depending on the grade. 3-tab shingles last about 15 to 20 years. Architectural shingles last about 25 to 30 years. Luxury shingles can reach 50 years.
Real lifespan also depends on climate and install quality. In Los Angeles, strong sun and heat age shingles faster than in mild climates, so good attic ventilation and quality installation matter. A poorly vented roof can wear out years early.
What should LA homeowners know about shingle roofs?
Los Angeles adds a few local rules that affect your shingle roof and its cost. A good contractor handles all of them.
- You need a permit. Most re-roofs in the City of LA require an LADBS permit.
- Cool-roof rules may apply. Replacing more than half your roof can trigger California’s Title 24 “cool roof” rule, which asks for sun-reflecting, rated shingles. Many shingle brands now offer cool-roof-rated colors.
- Fire rating matters. Homes in wildfire zones need Class A fire-rated roofing. Most quality asphalt shingle systems meet Class A when installed correctly.
- Heat and wind. LA sun ages shingles faster, and Santa Ana winds test wind ratings, so architectural shingles are often the safer choice here.
Get a shingle roof quote
The only way to know your exact price is a look at your actual roof. Green Star Remodeling is a licensed, bonded, and insured Los Angeles contractor (CA Lic #1088206). Our roofing services cover shingle roof installation, replacement, and repair across the San Fernando Valley, with permit, tear-off, install, cleanup, and code compliance included.
Frequently Asked Questions
What affects the cost of a shingle roof?
The main drivers are the shingle grade, your roof’s size, its pitch and shape, whether the old roof is torn off, and local labor and code rules. Higher grades and steeper, more complex roofs cost more. Los Angeles labor rates and code requirements also add to the total.
How is a shingle roof measured and priced?
Roofers measure in “squares,” where one square equals 100 square feet of roof. Your estimate lists the number of squares and the shingle grade. Shingles come in bundles, and about three bundles cover one square. Comparing quotes by the square helps you compare them fairly.
How do you install shingles on a roof?
Pros tear off the old roof, inspect and repair the deck, add drip edge and underlayment, then lay shingles from the bottom up with flashing around chimneys and valleys. They finish with ridge caps, a magnetic nail cleanup, and a final inspection. Full-home installs are steep and risky, so most homeowners hire a licensed roofer.
Are architectural shingles worth it over 3-tab?
Yes, for most homes. Architectural shingles cost a bit more than 3-tab but last 5 to 15 years longer and resist much higher winds. That makes them a better long-term value, especially in windy, sunny areas like Los Angeles. 3-tab mainly suits rentals or a home you’ll sell soon.
How long does an asphalt shingle roof last?
3-tab shingles last about 15 to 20 years, architectural shingles last 25 to 30 years, and luxury shingles can last up to 50 years. Climate, attic ventilation, and install quality all affect the real lifespan. In Los Angeles, strong sun and heat can shorten it, so good ventilation is key.
