What a Roof Replacement Costs in Alpharetta in 2026
Alpharetta roofs are expensive to replace for a reason that has nothing to do with the roofer's margins: they are big, they are steep, and they are cut up. A 3,200 sq ft two-story off Webb Bridge Road with a 10/12 pitch, four valleys, two dormers and a chimney has 40 squares of roof and takes a crew twice as long as a 40-square ranch in Cumming would. Here are the 2026 numbers, and the reasons behind them.
The per-square price
Architectural shingle replacement in Alpharetta runs $450–$800 per square installed (a square is 100 sq ft of roof surface). That includes tear-off and disposal, decking inspection, synthetic underlayment, ice-and-water membrane at eaves, valleys and penetrations, new flashing and pipe boots, ridge vent, six-nail installation, and cleanup with a magnet sweep. Because most roofs here are over 8/12 and heavily cut up, the majority of Alpharetta jobs land in the $600–$800 part of that range. A simple, walkable gable roof lands at the bottom.
By house size
| House | Roof size | Architectural shingle | Designer shingle | Standing seam metal |
|---|---|---|---|---|
| 2,000 sq ft ranch, simple roof | 22–26 sq | $10,000–$15,500 | $13,500–$22,000 | $27,000–$52,000 |
| 2,500 sq ft two-story | 28–34 sq | $13,000–$23,000 | $18,000–$30,000 | $34,000–$68,000 |
| 3,500 sq ft two-story, cut-up | 38–48 sq | $18,000–$34,000 | $25,000–$44,000 | $46,000–$96,000 |
| 5,000 sq ft Milton/Johns Creek custom | 55–70 sq | $26,000–$49,000 | $35,000–$65,000 | $66,000–$140,000 |
The roof replacement cost Alpharetta homeowners most often pay is $18,000–$30,000, because the 3,000–3,500 sq ft two-story is the city's most common house. These are typical ranges, not a quote; your roof gets a written price after we walk it.
What moves the number
Pitch. Below 8/12 a crew walks the roof. Above it they need staging, roof jacks and harness anchors, and everything slows down. Most Alpharetta subdivisions built after 1990 are 9/12 to 12/12. Figure 10–20% over a walkable roof.
Complexity. Every valley needs membrane and careful weaving or a metal liner. Every dormer has two sidewalls to step-flash. Every chimney needs new step flashing, counter-flashing cut into the mortar and, if it's wider than 30 inches, a cricket behind it. A Country Club of the South roof with three chimneys and six dormers has more flashing work than shingle work.
Decking. OSB that has been under a slow valley leak for five years is mush. Replacement is $90–$150 per 4x8 sheet. A well-kept roof needs zero to two sheets; a neglected one can need eight or ten. Any quote should show a per-sheet allowance, not "as needed."
Shingle line. The heavyweight architectural lines (GAF Timberline UHDZ, Owens Corning Duration Designer, CertainTeed Landmark Premium) add $50–$120 per square. The luxury lines that mimic slate and shake (Grand Manor, Presidential Shake, Grand Sequoia, Berkshire) add $150–$300 per square and more labor, since they're heavier and slower to lay. North Fulton buys a lot of these, and on the right house they earn it.
Metal accents. A standing-seam porch or bay-window accent installed during the replacement adds $2,500–$7,000 in Kynar steel; copper is more. See metal roofing.
Ventilation fixes. Cutting in a ridge vent and clearing soffit vents is usually included. Adding soffit vents to a house that has none, or replacing blocked gable vents, is $400–$1,200 extra and worth every dollar in an attic that hits 130 degrees.
Access. Gated communities, long gravel drives on Milton acreage, pool decks, and back slopes with no truck access all add time.
HOA submittal. Preparing the ARC package for a color or profile change is included in our price. The time it takes the committee to approve it is not something anyone controls.
What a quote should list
If you're comparing quotes from a few roofing contractors Alpharetta homeowners recommend, line them up on these items, not the bottom line:
- Full tear-off, not a roof-over
- Synthetic underlayment (not 15-lb felt)
- Ice-and-water membrane — and where: valleys, eaves, penetrations
- The named shingle product and its wind rating
- Six nails per shingle
- Decking allowance per sheet
- New flashing, boots and drip edge — nothing reused
- Ridge vent and soffit ventilation
- Who handles the HOA submittal and any permit
- Manufacturer warranty and workmanship warranty, in years
A quote $4,000 under the others is usually missing two or three of these. The most common omissions are the membrane at the eaves, the decking allowance, and new counter-flashing at the chimney (the cheap quote reuses the old, which is why the chimney leaks two years later).
Paying for it
Insurance pays for sudden storm damage, not age; see the storm damage page for how Georgia claims work. For a roof you're buying outright, roof financing Alpharetta roofers offer runs through manufacturer-backed lenders at 12–60 months. On a $25,000 roof, a home equity line is often cheaper. Either way, get the roof price in writing first and the financing separately, so you can see what each costs.
For how to decide whether you need a new roof at all, read repair versus replacement. For the full breakdown of what's included, see roof replacement.
Need roof work in Alpharetta?
Call for a free estimate. Mon–Sat 7am–7pm.