A ground level deck is one of the easiest ways to turn a plain patch of yard into a space you actually use. It sits low, it usually needs no railings or stairs, and a handy homeowner can build one in a few weekends.
But low does not mean simple. The ground under a low deck stays damp, airflow is limited, and small shortcuts turn into rot within a few years. As a company that does both home inspections and general contracting in the Triangle, we see both sides: the decks we build, and the decks we flag during inspections.
This guide walks you through every step, from planning and permits to the last deck board. You will also learn the mistakes we find most often, so you can avoid them from day one.
In this guide you will learn:
- What a ground level deck is and when it makes sense
- Permit and code basics for North Carolina homeowners
- Which materials hold up best close to the ground
- A clear, step by step build process
- Real costs, timelines and common mistakes
What Is a Ground Level Deck?
A ground level deck is a low platform deck that sits close to the ground, usually less than 30 inches above grade. Many are only one step up, around 8 to 12 inches high. You may also hear them called floating decks or platform decks.
The 30 inch mark matters. In North Carolina, once the walking surface reaches 30 inches above the ground, you need guardrails at least 36 inches tall. Staying under that height keeps the build simpler and cheaper.
Floating Deck vs Attached Deck
- Floating (freestanding) deck: Stands on its own footings and is not bolted to the house. This is the most common choice for low decks and the one this guide covers.
- Attached deck: Connected to the house with a ledger board. It needs flashing, through bolts and careful work on the house band, so it almost always needs a permit and more skill.
Why Homeowners Love Low Decks
- No railings or stairs in most cases, which saves money
- Great for uneven yards, dead grass spots or soggy areas
- Easy to build in stages or add onto later
- Cooler underfoot than concrete in the summer
Before You Build: Permits, Rules and Safety
Skipping this step is the most expensive mistake you can make. A deck built without the right approval can fail a home inspection when you sell, and you may be asked to open it up or tear it down.
Do You Need a Permit in North Carolina?
The answer depends on where you live. Rules are not the same across every town:
- The Town of Cary states that the NC Residential Code requires a permit for all decks, no matter the size or location on the lot.
- The City of Raleigh deck guide also tells homeowners to get a building permit before building.
- Some counties exempt small freestanding decks under 30 inches high. Others do not.
Our advice is simple: call your local inspections office before you buy a single board. It is a free phone call, and it can save you thousands later.
Check Setbacks and HOA Rules
- Your zoning sets how close a deck can sit to property lines.
- Many HOAs in the Raleigh, Durham and Chapel Hill area want to approve size, color and materials first.
- Check for drainage easements or utility easements on your plot plan.
Call 811 Before You Dig
Even shallow footing holes can hit a gas or power line. Call 811 (NC 811) at least three working days before digging. Utility crews will mark buried lines for free.
Choosing the Right Materials
For a low deck, the frame matters more than the boards you walk on. The frame sits in the dampest air, closest to the soil, and it is the part you cannot easily replace.
Framing: Use Ground Contact Lumber
Pressure treated lumber comes in two main ratings: Above Ground and Ground Contact. Check the end tag on every board. For a low deck, buy Ground Contact rated lumber for all posts, beams and joists. It costs a little more, but it is made for damp spots with poor airflow.
Decking Options Compared
| Material | Upfront Cost | Typical Lifespan | Upkeep | Best For |
| Pressure treated pine | Lowest | 10 to 15 years | Clean and seal every 1 to 2 years | Tight budgets and DIY builds |
| Cedar | Medium | 15 to 20 years | Seal yearly to keep color | Natural wood look, dry spots |
| Composite | Highest | 25 years or more | Wash once or twice a year | Low maintenance, long term value |
| PVC decking | Highest | 25 years or more | Very little | Shady, damp yards |
Lifespans are general ranges and depend on climate, shade and care.
Tip: If you choose composite or PVC boards, read the maker’s install guide before you start. Many brands list a minimum gap between the frame and the ground for airflow, and skipping it can void the warranty.
Fasteners Matter Too
Treated lumber can eat through cheap metal. Use hot dipped galvanized or stainless steel screws, nails and joist hangers that are labeled for treated wood.
Tools and Materials Checklist
Gather everything before day one. Running to the store halfway through a frame is how mistakes happen.
Tools
- Tape measure, framing square and chalk line
- Circular saw (a miter saw helps a lot)
- Drill and impact driver
- 2 foot and 4 foot levels
- Shovel, rake and hand tamper
- Post hole digger or rented auger
- String line, wooden stakes and marking paint
- Safety glasses, gloves, ear protection and a dust mask
Materials
- Ground Contact pressure treated lumber for beams, rim joists and joists
- Decking boards of your choice
- Concrete mix and tube forms, or precast deck blocks
- Post bases, joist hangers and corner brackets
- Exterior rated deck screws and structural screws
- Landscape fabric and 3/4 inch crushed gravel
- Joist tape (optional, but it helps the frame last longer)
- Deck stain or sealer
Helpful hint: Plan your deck size around standard board lengths like 8, 10, 12 or 16 feet. You will waste less wood and make fewer cuts.
How to Build a Ground Level Deck: Step by Step?
The steps below are for a simple freestanding deck about one step off the ground. Always follow your approved plan and local code if they say something different.
Step 1: Choose the Spot and Draw a Plan
Pick a spot that drains well and gets the sun you want. Then sketch your deck on paper with the size, beam lines, joist spacing and footing spots.
- Keep the deck at least 1 inch away from the house if it sits close, so water is not trapped against the siding.
- Make sure doors can still swing open over the deck height.
- A 10 x 12 or 12 x 12 foot deck fits a table and four chairs with room to walk.
Step 2: Lay Out and Square the Deck
- Drive stakes a little past each corner and set up batter boards.
- Run string lines to mark the outside edges of the deck.
- Check that the corners are square with the 3 4 5 method: mark 3 feet on one string and 4 feet on the other. The distance between the marks should be exactly 5 feet.
- Measure both diagonals. When they match, your layout is square.
- Spray paint the footing spots on the ground.
Step 3: Prepare the Ground
This is the step most DIY guides rush, and it is the one that decides how long your deck lasts.
- Remove grass and roots inside the layout, about 3 to 4 inches deep.
- Grade the soil so it slopes gently away from the house.
- Lay landscape fabric to stop weeds.
- Spread 2 to 4 inches of crushed gravel and tamp it firm. Gravel drains fast and keeps the frame drier.
Step 4: Set the Footings
Your footings carry the whole deck, so do not guess here.
- Concrete piers: Dig into firm, undisturbed soil. The City of Raleigh guide asks for the bottom of each footing to sit at least 12 inches below grade, and each post must rest on a concrete footing.
- Deck blocks: Precast blocks are common on small floating decks. Set them on a tamped gravel base. Ask your inspector first, since not every town accepts them.
- Space footings to match your beam size in your plan. Many low decks use footings every 4 to 6 feet along each beam.
- Use a long straight board and level to make sure all footings sit at the right height.
Step 5: Install the Beams
Set your beams on post bases or directly in the deck block slots. Check that each beam is level along its length and from one beam to the next. Shim with composite shims or adjust the footings, never with scrap wood.
Step 6: Build the Frame
- Attach the rim joists to form the outside box.
- Mark joist spots every 16 inches on center. Use 12 inches on center if you plan to run boards at an angle or use some composite brands.
- Fasten joist hangers to the rim joists.
- Set each joist with the crown (the slight curve) facing up.
- Measure the diagonals again and square the frame before final fastening.
For reference, the Raleigh guide lists these spans for #2 Southern Yellow Pine joists at 16 inches on center: a 2×6 joist spans up to 9 feet 4 inches, and a 2×8 spans up to 11 feet 10 inches.
Step 7: Protect the Frame
Run joist tape along the top of every joist and beam. It keeps water from sitting where screws enter the wood, which is where rot usually starts. On a low deck where airflow is weak, this small step pays off.
Step 8: Install the Deck Boards
- Start with a perfectly straight board along the most visible edge.
- Leave about a 1/8 inch gap between wood boards for drainage. For composite, follow the maker’s spacing.
- Drive two screws into each joist, about 3/4 to 1 inch from the board edges.
- Pre drill near board ends to stop splitting.
- Stagger the end joints so they always land on a joist.
- Let the boards run long, then snap a chalk line and trim them all at once for a clean edge.
Step 9: Finish the Edges
Add fascia boards to hide the frame for a clean look. If you add skirting around the sides, use lattice or leave vent gaps so air can still move under the deck.
Step 10: Seal or Stain
New pressure treated wood is often still wet. Sprinkle a few drops of water on the boards. If the water soaks in, the wood is ready for stain or sealer. If it beads up, wait a few more weeks.
7 Mistakes Home Inspectors Find on Low Decks
During home inspections, low decks often look fine from the top. The trouble shows up when we look underneath. Here is what we find most often:
- Wood touching soil. Joists or beams resting on dirt will rot, even when treated. Keep the frame on footings and gravel.
- Wrong lumber rating. Above Ground lumber used where Ground Contact is needed is one of the most common causes of early decay.
- No drainage plan. Water pooling under the deck keeps the frame wet for days after every rain.
- Toenailed joists with no hangers. Joists only nailed at an angle can loosen and sag over time.
- Cheap fasteners. Plain steel screws and nails rust out fast in treated lumber.
- Footings on loose fill. Footings set on soft or freshly dug soil sink unevenly, and the deck starts to rock or tilt.
- Deck pressed against the house. A deck touching the siding traps water and can lead to hidden damage on the house itself.
The good news is that every one of these problems is easy to avoid when you plan for it at the start.
How Much Does a Ground Level Deck Cost?
Cost depends on size, materials and whether you do the work yourself. Here are rough national ranges to help you plan:
- DIY with pressure treated wood: About $15 to $20 per square foot for materials, according to Angi.
- Hiring a pro: Most deck projects run about $30 to $60 per square foot, including materials and labor.
- Composite decking: Expect the board cost to be noticeably higher than wood, but with less upkeep over the years.
- Extras: Permit fees, tool rentals, stain, lighting and outlets add to the total.
Prices in your area may be different, so get a few local quotes before you decide.
How Long Does It Take?
- A 10 x 12 foot deck usually takes two people about two to four weekends.
- Site prep and footings take the most time.
- Waiting for permits or inspections can add one to two weeks.
- A professional crew can often finish a simple low deck in a few days.
Should You DIY or Hire a Pro?
A simple, square, freestanding deck is a great DIY project if you have basic carpentry skills and a helper. It gets harder when your project has any of these:
- A sloped yard where one side rises close to 30 inches
- A deck attached to the house
- Built in benches, planters, steps or lighting
- Soft, wet or clay heavy soil
- A tight schedule or an HOA that wants drawings
Where Enteck Can Help
At Enteck, our team is both a licensed home inspector and a general contractor. That means we build with an inspector’s eye for code, structure and long term safety. Homeowners in Raleigh, Durham and Chapel Hill call us for full deck builds and for a second opinion on plans they want to build themselves.
If you would like a quote or a quick look at your deck plan, you can learn more about our general contracting services or contact our team.
Frequently Asked Questions
Can I build a deck directly on the ground?
You should not lay the frame right on the dirt. Set it on footings or deck blocks over a gravel base, so air can move and water can drain away.
What do you put under a ground level deck?
The best setup is landscape fabric covered with 2 to 4 inches of crushed gravel. It blocks weeds, drains fast and keeps the area under the deck drier.
Do I need a permit for a ground level deck in NC?
It depends on your town or county. Some places require a permit for every deck, while others exempt small freestanding decks under 30 inches high. Call your local inspections office before you start.
Do I need concrete footings for a floating deck?
Not always. Many small floating decks use precast deck blocks. Larger decks, or decks in towns that require permits, often need poured concrete footings set into firm, undisturbed soil.
How far apart should joists be on a low deck?
Most decks use joists every 16 inches on center. Use 12 inches on center if you plan to install boards at an angle or if your composite brand asks for it.
What is the best wood for a ground level deck?
Ground Contact rated pressure treated lumber is the best value for the frame. For the walking surface, you can use treated wood, cedar, composite or PVC based on your budget.
How long will a ground level deck last?
A well built treated wood deck can last 10 to 15 years or more with regular care. Composite boards often last 25 years or more, but the wood frame below still needs to be protected.
Final Thoughts
Building a ground level deck is very doable when you take your time with the parts nobody sees. Check your permit rules, prep the ground well, use Ground Contact lumber and give the frame room to breathe. Do those things right, and the deck boards on top are the easy part.
If you are planning a deck in the Raleigh, Durham or Chapel Hill area and want it built right the first time, the team at Enteck is happy to help you plan it, build it or check your work.
Written by the Enteck team, licensed home inspectors and general contractors serving Raleigh, Durham and Chapel Hill, NC.
