What is the largest deck without a permit in Alpharetta, GA?

May 30th, 2025 by Office Marketer

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If you're thinking about building a new deck or replacing an old one in Alpharetta, Georgia, it's important to understand the local regulations before you get started. Whether it’s a cozy space for morning coffee or a large area for entertaining, decks are a valuable addition to any home—but they must comply with city and county building codes.

Here’s a simple breakdown of what you need to know about deck permits, material guidelines, and construction requirements in Alpharetta and Fulton County.

Do You Need a Permit for Your Deck?

In most cases, yes. Here’s when a permit is typically required:

If your deck is attached to your home
If it’s elevated more than 30 inches above ground level
If the deck’s total area exceeds 200 square feet

Even for smaller or ground-level decks, it's a good idea to check with the local building department to confirm requirements.

Deck Material Guidelines

Using the right materials—and installing them correctly—is key to a safe and durable deck. Here are a few important standards:

Decking materials like wood and wood-plastic composites must be installed according to the manufacturer’s instructions.
For wood decking, you’ll typically use either:
- 2x6 boards, or
- 5/4-inch (five-quarter) decking

Design & Structural Requirements

Alpharetta and Fulton County follow specific design standards to ensure deck safety. Some key guidelines include:

1. Deck Dimensions and Shape

For decks attached to the house, the length-to-width ratio should not exceed 2:1. This keeps the deck structurally stable.

2. Overhangs

Beams can overhang each end by up to one-fourth of the beam’s span. This provides flexibility in design while maintaining support.

3. Stair Requirements

Stair handrails must be between 34" and 38" high
Stairways must be at least 36 inches wide, ensuring safe passage

4. Footings

Deck footings must be placed at least 12 inches below the ground surface to help prevent movement during freeze/thaw cycles and provide adequate support.

Why These Rules Matter

These regulations are designed to protect your safety, maintain property value, and ensure that your deck will last for years to come. Following them also helps avoid costly delays or corrections if a structure is found to be non-compliant during inspection.

Need Help with Your Deck Project?

Navigating permits and construction codes can be a challenge—but you don’t have to do it alone. At Housworth Construction, we specialize in designing and building code-compliant decks across the Alpharetta area. From permits to finishing touches, we handle it all.

Ready to start your deck project? Contact us today for a free consultation! https://www.housworthconstruction.com/exterior-remodeling/decks.html