Today we’ll show how we built a simple DIY deck gate to keep our dog, Burger, from slipping off the deck. He loves lounging in the sun, but we wanted an affordable, attractive barrier to stop him from chasing squirrels. With a newborn and a toddler in the house, the gate also provides extra safety for the kids. The whole project took only a few hours and cost under $30 in materials for one gate.
We don’t have a yard fence, and Burger has been getting bolder lately—he’s even wandered into the neighbor’s yard a few times. Until now, our makeshift fix was leaning plywood boards across the opening. It worked, but it was flimsy and unattractive, so we decided to build something integrated with the deck.
Rather than buy a premade freestanding gate, we designed one that matches our deck and swings on traditional hardware. It blends better with the railing and gives a more secure, finished look.
Material & Supply List
After reviewing a few helpful tutorials and sketching a modified plan, I made a trip to the home center. Here’s what we used for each gate:
- Pressure-treated 2×4 boards
- Pressure-treated 2×2 balusters
- Gate hinge and latch set
- Miter saw (or saw for angled cuts)
- Screwdriver or drill
- 2″ deck screws
- Measuring tape
- Clamps
- Pocket hole jig (optional)
- Carpenter’s square (optional)
Buying longer 10′ boards and having them cut to fit my car saved money and reduced waste. I was building two gates, so my total material needs were double what you see in the photo.
Step 1: Measure & Cut Your Wood
Start by measuring the opening. Make each gate about 1″ narrower than the opening so there’s room for it to swing freely. The height should match your existing railing. Our gate was 44″ wide and 29″ tall. For a cleaner look, we mitered the corners, but square corners work fine too.
Use a carpenter’s square to mark 45° cuts when mitering. Cut the top and bottom boards as a pair and the two side pieces as a pair so lengths match precisely and the frame stays square. Clamping boards together while cutting keeps the pieces aligned.
Cutting matched pairs helps the gate fit together neatly and reduces the amount of trimming required when assembling the frame.
Step 2: Screw Your Gate Frame Together
I used a pocket hole jig to create two pocket holes at the ends of the vertical boards to attach the horizontals. Pocket holes provide a tight, clean joint and are easy to fill later. If you don’t have a pocket hole system, driving long screws through the sides works fine.
Assemble the frame using 2″ deck screws. Check for square as you tighten the screws, and clamp pieces to hold alignment while fastening. This gives a sturdy foundation for the balusters and hardware.
Step 3: Add Balusters To Your Gate
Attach vertical 2×2 balusters to match the look and spacing of the rest of your deck railing. Measure the spacing between existing balusters and plan how many will fit across the gate—our gate held five balusters. After cutting them to length, install the center baluster first, fastening it at the top and bottom, then work outward to maintain symmetry.
Use a simple spacer made from scrap wood to keep each baluster evenly spaced. This speeds installation and keeps the visual rhythm consistent with the rest of the railings.
Step 4: Hang Using A Gate Hardware Kit
When the gate was complete, we mounted it using an affordable hardware kit that included two T-hinges and a latch. Choose hinges that span a sensible proportion of the gate’s length—our 8″ hinges were about right for the size of our gate.
To hang the gate, prop it in place with scrap wood and mark hinge and latch positions. We fastened the hardware using the screws provided. In one corner location the top hinge hit the existing railing, so we mounted it slightly lower than centered. Once the wood is stained, that small offset will blend in.
We also installed the latch on the opposite side and tested the swing and closure. For larger or heavier gates, consider an anti-sag kit to maintain square over time, but for our relatively small gates we skipped it to keep the design clean.
One gate attached at a corner required small blocks to give the hinge a solid mounting surface because the hinge was taller than the horizontal rails. We used mitered scraps to create those blocks, which will be nearly invisible once stained.
After staining, those blocks blend into the railing and provide secure attachment points.
Step 5: Stain And/Or Seal Your Gate
Finish the gate to match your deck. Wait 2–3 weeks before staining or sealing pressure-treated wood so it can dry; sealing too soon can cause bubbling or peeling. We used the same stain and sealer previously applied to our deck so the new gates match the existing finish. Below is a photo showing one finished gate in the background.
It took roughly three hours to make both gates. Our total cost for the pair was about $53—approximately $23 for wood and $30 for hardware. The gates have been very effective at keeping Burger on the deck. He could squeeze through if he tried, but he’s not adventurous enough to do so. This solution also adds peace of mind for the kids, helping prevent accidental falls down the stairs as they grow more mobile.
Even though our children don’t play unsupervised on the deck yet, the gates provide useful protection and will become more valuable as the toddler grows and the newborn starts to walk.
Want More Deck DIY Projects?
We’ve completed many deck projects over the years. If you’re interested in learning more, look for guides on stripping and cleaning a deck, patching deck boards, staining and sealing a deck, and building a deck from scratch. These projects build on the same basic skills used to create a secure, attractive deck gate.
- How to strip and clean a deck
- How to patch a hole in a deck
- How to stain and seal a deck
- How to build a deck