Some homes are built up off the ground instead of directly on a slab. This type of base is called a raised foundation. It uses supports such as piers, piles, or stilts to hold the structure above the ground. These supports are usually installed deep into the soil to create a strong base.
You might also see this type of foundation along coastlines or in areas with poor soil conditions. It is a common solution for keeping homes level and safe in tough spots.
When is a Raised Foundation Needed?
Homes Near Water or Flood Zones
Raised foundations are often used near rivers, lakes, or oceans. These areas are prone to flooding, so lifting the home helps protect it from water damage.
Key areas that benefit from raised foundations:
- Coastal regions with rising tides
- Low-lying land near creeks or streams
- Flood-prone neighborhoods
Sloped or Uneven Ground
If the land has a steep grade, it is hard to pour a flat concrete slab. In these cases, a raised foundation allows us to level the home using support piers.
How is a Raised Foundation Built?
The Basic Structure
To build a raised foundation, we use piles or piers driven deep into the soil. In some cases, these supports reach bedrock. This creates a stable base that will not shift over time.
Once the piers or stilts are installed, we frame the floor of the house above them. That floor then holds the rest of the home.
Common Materials Used
- Steel pilings: Strong and used when deep support is needed
- Concrete piers: A good choice for medium-depth support
- Wood posts: Often used for lighter structures or coastal homes
Pro Tip: The best type of support depends on your soil, elevation, and flood risk. Always get a soil test before choosing a foundation type.
Need expert help with a raised foundation? Contact Olson for a free consultation. Our team will assess your lot, explain your best foundation options, and provide a detailed quote. No pressure, just answers.
What are the Benefits of a Raised Foundation?
Better Protection from Moisture
By lifting the home off the ground, a raised foundation helps prevent water from seeping into the structure. This is key for areas with high water tables or frequent rain.
Easier Access for Repairs
Raised homes usually have a crawl space underneath. This makes it easier to reach plumbing, electrical, or HVAC systems if something needs fixing.
Added Ventilation
The space under a raised home allows air to flow, which can help reduce moisture and mold problems under the house.
How Much Does a Raised Foundation Cost?
The cost of a raised foundation depends on a few factors:
- Type of support (steel piles cost more than wood posts)
- Depth needed to reach stable soil or bedrock
- Size and layout of the home
- Site prep and soil conditions
Average cost range: 10,000 to 40,000 dollars or more, depending on the project
Key Takeaway: A raised foundation costs more upfront than a basic slab but often saves money long term by protecting the home from water and soil issues.
Raised Foundation vs Slab Foundation
What is the Difference?
- Slab foundations sit directly on the ground
- Raised foundations lift the house above the ground using support piers or stilts
When to Choose Raised Over Slab
Choose a raised foundation if:
- The site is near water
- The ground is soft, uneven, or unstable
- You need crawl space access
In Summary
A raised foundation lifts the home above the ground using strong supports like steel or concrete piers. This design is useful in areas near water, on sloped land, or where the soil is not ideal. It adds protection from moisture and allows easy access to utilities.
Contact Olson today to schedule your raised foundation inspection or get a free quote. We are here to help you build smart from the ground up.
