For three years we had a sliding glass door that opened onto nothing. Just a three-foot drop into the yard. Every time guests came over I saw them hesitate at the door, confused about whether they were supposed to step out into thin air. My wife wanted a deck. I wanted to stop being embarrassed. So last summer I built one.
I am not a contractor. I am a guy who owns a drill and a circular saw and has watched enough YouTube to be dangerous. This was by far the biggest project I have ever tackled. It took me two full weekends and about $2,400 in materials for a 12-by-16 foot deck at ground level. If I had hired it out I would have paid $6,000 minimum. Here is the whole story.
The Planning Phase Nobody Talks About
Before swinging a hammer I spent two evenings on planning. I measured my yard, sketched the deck on graph paper, and marked where every post would go. I called 811 to get utilities marked — it is free and took three days for them to come spray the grass. One of my gas line markers ran exactly where I had planned a post hole. I shifted the layout two feet and avoided a very bad day.
I also visited the city building department. Ground-level decks under 30 inches technically did not need a permit in my town, but I checked anyway. The clerk was actually helpful — she handed me a one-page handout with the local requirements for joist spacing, railing height, and post depth. Worth the 20-minute visit.
What I Bought and Where the Money Went
The lumber yard trip was humbling. I had budgeted $1,500 in my head and reality laughed at me. Here is the actual breakdown.
Pressure-treated lumber for the frame — posts, beams, joists, ledger board — ran about $700. I used four 4×4 posts, two doubled 2×8 beams, 2×8 joists spaced 16 inches on center, and a 2×10 ledger board to attach to the house. Decking boards were the next big chunk. I went with pressure-treated pine at about $1.50 per linear foot. For 192 square feet of deck surface, the boards cost around $400. Composite would have been $1,200 or more, and I just was not ready to spend that.
Concrete was surprisingly cheap. I bought fourteen 80-pound bags of Quikrete at $6 each — $84 total. Gravel for the footing bases was $40 for a half-yard delivered. Hardware adds up fast: joist hangers, post anchors, and the right screws cost about $130. I used Simpson Strong-Tie post bases and joist hangers, and bought two boxes of 3-inch deck screws plus one box of 1-5/8 inch screws for the decking.
The railing was $350 for a pressure-treated kit with balusters. Stain and sealant added another $60. I borrowed a post-hole auger from my neighbor, which saved me $50 on rental. Tools I already owned: circular saw, drill, level, speed square, chalk line, hammer, wheelbarrow, shovel, string line, stakes, and safety gear. If you are starting with nothing, add $200 to $400 for tools. Total materials: about $2,400.
The Build Itself, Warts and All
Weekend one was all about the foundation. Saturday morning I laid out the perimeter with stakes and string, measured diagonals to square the corners, and marked my four post locations. Then I started digging.
Digging post holes by hand is the worst part of building a deck. Each hole was 12 inches wide and 24 inches deep. The soil in my yard is clay mixed with rocks the size of softballs. The first hole took 45 minutes. By hole three I was questioning every life choice that led me to this moment. If you can rent a power auger for $80, do it. I was too stubborn and my back paid the price.
I dumped 4 inches of gravel in each hole for drainage, set the post anchors, placed the 4×4 posts, and used braces to hold them plumb. Mixing concrete in a wheelbarrow is a workout. I did two bags at a time, poured them into the hole around the post, tamped with a stick to remove air pockets, and checked plumb one more time before the concrete started to kick. All four posts were set by Saturday evening. I let them cure until the following Saturday.
Weekend two started with the ledger board. This is the board that bolts to your house and it is the most critical connection in the whole deck. I held a 2×10 against the house at the right height, drilled pilot holes into the rim joist of the house every 16 inches, and secured it with 4-inch lag screws. Then I installed flashing tape over the top edge — a strip of adhesive membrane that keeps water from seeping behind the board and rotting your house. Do not skip flashing. Water behind a ledger board is how decks pull away from houses.
Beams went on top of the posts using metal post caps. I used doubled 2x8s nailed together every 12 inches. Joists followed, running from the ledger to the beam, hung with joist hangers at both ends. Sixteen inches on center, every single one leveled and squared. This took most of Saturday.
Sunday was decking day. I started at the house side and worked outward, leaving an eighth-inch gap between boards using a framing nail as a spacer. Two screws per board at every joist. I staggered the end joints so they did not all line up in a row — it looks better and is stronger. Once all the boards were down I snapped a chalk line at the outer edge and ran the circular saw to trim the overhang flush. That clean cut line is surprisingly satisfying.
The railing took another half day the following weekend. Posts bolted to the rim joist, top and bottom rails screwed in, balusters spaced 4 inches apart. Stairs were simpler than I expected — I cut three stringers from a 2×12 using a framing square, attached them to the deck frame with metal brackets, and screwed down two 2×6 treads per step.
I waited three weeks before staining to let the pressure-treated wood dry out. Used a Behr semi-transparent stain in cedar tone, rolled on with a paint roller and back-brushed. One coat, done in three hours.
What I Would Do Differently
I should have rented the auger. No question. Four holes by hand in clay soil cost me a full day and a very sore back. Eighty bucks for a powered auger would have been the best money I never spent.
I also underestimated how many screws I would need. I made two extra trips to Home Depot mid-project. Buy more than you think — screws do not go bad and extra trips kill momentum. For a 12×16 deck you want at least 10 pounds of 3-inch deck screws and 5 pounds of 1-5/8 inch.
The ledger flashing gave me trouble because I did it after the board was already bolted up. Flashing is way easier to install if you stick it to the top edge of the board before you bolt it. Learn from my contortions and do it on the ground.
All that said, this deck is solid. I have had friends over who assumed I hired it out. Is it perfect? No — there is a board near the far corner that curves slightly upward because I did not notice the crown before screwing it down. But it is mine, I built it, and every time I walk out that sliding door onto something instead of nothing I feel pretty good about the two weekends I spent.
