Alpharetta

Helical piles in Alpharetta, Georgia

Alpharetta sits on the Piedmont, where homes rest on red clay and saprolite, the decomposed rock the New Georgia Encyclopedia says covers much of the region. Saprolite can vary sharply over short distances, and fill placed during grading can settle, which leads to uneven movement.

Helical piers carry loads past soft fill or weak clay to firmer material, and their small footprint suits wooded lots and finished landscapes. The Georgia Residential Code requires exterior footings at least 12 inches below undisturbed ground, but frost rarely controls here. A soil report or test pile shows how deep firm bearing is on a given lot.

Helical pile companies serving Alpharetta

One company serving the area is listed.

• Atlas Piers of Atlanta: offers underpinning, helical piers, shoring and retaining wall repair for homes and commercial sites around metro Atlanta.

Costs and what to ask

According to HomeGuide, helical piers commonly cost $2,000 to $4,000 each installed across the country. Georgia projects shift within that range based on depth to firm soil and access. Read our helical pier cost guide for what a quote should include.

Questions to put to any installer:

• Will a licensed engineer design the piles for variable saprolite and fill, and can you see the calculations?
• What installation torque will be logged for each pile, and will you receive the torque records?
• What shaft diameter and wall thickness are proposed, and is the steel galvanized in red clay?
• Who pulls the permit with the City of Alpharetta, and what does the written warranty cover?

For the wider picture, see our page on Georgia helical pile installers.