3 Top Options for Deck Footings Without Digging and When to Use Them

Whether you’re building a new deck or adding to your current setup, you may wonder if you can create deck footings without digging. While most methods of anchoring a deck involve digging, you can use deck blocks, post anchors with base plates, or a helical pile system. The type of footing you should use depends on your climate and local building code. Learn about deck footings without digging and how to choose the right option for your situation.

Can You Build Deck Footings Without Digging?

Yes, you can secure deck footings with deck blocks, post anchors with base plates, or ground screws, also called a helical pile system. The deck footing type must meet your local building code, which depends on your area's soil and weather conditions. No matter your municipality's guidelines, a taller or larger deck may require digging for your footings.

Deck Footings Without Digging: 3 Solid Options

How do you build a deck without digging footings? By using one of these three alternative types of deck footings: deck blocks, post anchors with base plates, or a helical pile system. Always check your local code to ensure you meet building requirements for your location and climate. There may be specific guidelines for footing depth based on the size and height of your deck. If you live in a cold climate or an area that experiences earthquakes and high winds, you may need to use deck footings that are below ground.

Deck Blocks

Photo: Adam Nowak / Wirestock / Adobe Stock

Deck blocks are precast concrete blocks with an indented area on top to hold a wooden beam or post. To install deck blocks, you or a pro can place the blocks on a level surface, such as a concrete pad. Then, you’ll attach the posts to the deck blocks with heavy-duty hardware to create a secure foundation. 

Deck blocks are a solid DIY option and best for ground-level decks not attached to a house. Check if deck blocks meet local codes in your area and climate.

Pros

• Easy to install

• Relatively affordable

• No digging required

• Can be moved 

• Unaffected by frost and protects deck posts from rotting

• Great for decks low to the ground

Cons

• May not be stable enough for large or tall decks

• May require more posts for stability

• Not compatible with unpredictable soil conditions

• Cannot hold heavy loads

• May not meet local building code

• Unstable in high winds and earthquakes

• Should not be attached to a home

• Requires a concrete slab or level area of compacted gravel

Post Anchors

A post anchor with a base plate is a metal bracket that holds a deck post and has flanges that reach deep into the ground. You or a pro can pound the base plate into the soil using a jackhammer. Then, you’ll insert the post into the bracket and screw it in place. 

Post anchors with base plates are DIY-friendly and a relatively affordable option. But make sure they can support the size and height of your deck. You’ll also need to see if they are permitted in your area and climate. 

Pros

• Easy to install

• Protects deck posts from rotting

• No digging required

• Easier to build upon than deck blocks

• Ties into the ground for extra stability

• Can support decks up to 8 feet tall

Cons

• May require more posts for stability 

• Unstable in high winds and earthquakes

• Should not be attached to the home

• Requires use of a jackhammer to ensure proper soil compaction

Ground Screw or Helical Pile System

A ground screw or helical pile system involves screwing a steel shaft into the ground with a hydraulic motor or machine. The deep screw system anchors the deck’s foundation into the ground. With the right machinery, these footings are incredibly sturdy and quick to install. They require a professional and are more expensive than other deck footing options.

Pros

• No drying or curing time

• Works well with most soil types and climates

• Extremely durable and reliable

• No digging required

Cons

• High installation and material costs

• Requires professional installation

How to Choose the Right Deck Footing

Digging holes for deck posts is arduous but might be required depending on your deck's size, height, and local building requirements. When choosing deck footings, consider a few key factors to ensure your deck meets the code and stands the test of time. 

Local Building Codes and Weather Conditions 

Check your local building guidelines before starting the project to see what’s allowed in your area. If your location is prone to hurricanes, earthquakes, high winds, or other severe weather conditions, you may only have one or two options for deck footings.

Soil Type

Wet or sandy soil is less stable than dry ground. Rocky mountain soil is more challenging to dig into. Consider the soil type on your property and consult a deck building pro if you’re unsure what type of footing to use.

Slope of Your Property

If you’re on a steep slope, you must create a level and solid footing to provide a stable deck foundation.

Attached vs. Freestanding

You can't use deck blocks or post anchors if you attach the deck to your home. But if it's a freestanding deck, ensure your foundation is solid and not prone to shifting in weather conditions. 

Deck Size and Height

A large deck requires a stronger foundation than a small one. A tall deck also requires stable footings, often ones that require digging.

DIY vs. Hiring a Pro

You can build a deck yourself if you have carpentry and concrete experience and the right tools. However, hiring a local deck builder can save you several days or weeks of labor-intensive work and ensure you meet local building codes (not to mention a pro can give you a rock-solid deck that lasts for decades). Building a deck can be strenuous work, so hiring a pro can reduce your risk of injury, too. The cost to build a deck falls around $8,100 on average but ranges from $4,400 to $12,400.