How to Build a Budget Wood Fence & Gate

My sister and I decided to give our dad a surprise backyard makeover, and building a DIY wood fence was step number one! We needed a clean way to section off the yard so we could grow new grass without our super messy dog making a mess in the rest of the backyard.

We designed and built this backyard wood fence from scratch. Along the way, we learned a ton, using Tinkercad was a game-changer because it helped us calculate the exact number of pickets before cutting a single piece of wood. If you want to learn how to build a wood fence the easy way (and save yourself a lot of time unlike us!), we made this guide so you can learn from our process and silly mistakes.

What this build includes:

1. A custom built-in gate
2. A clever board-spacer trick for perfect gaps
3. A weatherproof oil finish to make it last

Here is everything you need to build a wood fence with basic tools and a bit of teamwork!

Before you start cutting any wood, make sure you gather all your supplies. Learn from our mistake: buy everything in one trip, or you’ll end up driving back and forth to the hardware store three times in a single afternoon like we did!

Wood:

1. 28 Vertical wood boards (Pickets): 1x3x40 pine board for the main fence body. (Actual size: 0.75" x 2.75" x 40" / 2cm x 7cm x 100cm).
2. 2 Long Horizontal Rails: 1x4x8 pine boards to support the vertical wood boards. (Actual size: 0.6" x 3.5" x 96" / 1.5cm x 9cm x 245cm).
3. 2 Short Horizontal Rails: 1x4x4.75 pine boards to support the vertical wood boards. (Actual size: 0.6" x 3.5" x 57" / 1.5cm x 9cm x 145cm).
4. 3 Wall Posts: 2x4 pine posts, 40” long. These will be anchored directly into the concrete/brick walls. (Actual size: 1.2" x 3.5" x 40" / 3cm x 9cm x 100cm).
5. 1 Ground Post: 2x4 pine post, 55” long. This one will be buried in the ground for central gate support. (Actual size: 1.2" x 3.5" x 55" / 3cm x 9cm x 140cm).

Hardware & Finish:

1. Exterior Wood Screws: Galvanized or exterior-grade so they don't rust outdoors.
2. Heavy-Duty Masonry Anchors / Screws: To firmly secure the posts to the side walls.
3. Gate Hardware: 3 heavy-duty hinges and 1 gate latch/lock.
4. Weatherproof Wood Oil or Finish: To seal and protect the pine wood from rain and sun.

Tools:

1. Drill & Driver Bits (Essential for assembling panels and mounting posts)
2. Hand saw (Quite a workout so you can also use Circular Saw or Miter Saw)
3. Tape Measure & Pencil
4. Spirit Level (Your best friend to make sure nothing looks crooked)
5. Sander or Sandpaper (120 to 180 grit to smooth rough edges)
6. Paintbrush or Rag (To apply the wood oil)
7. Safety Gear: Glasses and a dust mask

Pro-Tip: Buy one extra wood board than you think you need! You'll use this extra board as a moving "spacer tool" later on to get perfectly equal gaps between every single slat without measuring each one.

Every backyard is different, so before buying a single piece of wood, you need to measure your space!

Our Backyard Specs:

1. Total Length to cover: 400cm (approx 13.1 ft)
2. Fence Height: 100cm (approx 3.3ft)

We wanted a fence height of around 1 meter (100cm) to keep our dog in check while still keeping the yard looking open and friendly. Based on our 400cm total span, we calculated that we needed 28 vertical pickets, 4 horizontal rails, and 4 posts.

How to adapt this to YOUR space:

If your backyard is longer or shorter, don't worry! This design is 100% scalable. Just measure your total gap length, decide how tall you want your pickets to be, and adjust the amount of wood accordingly.

Modeling in 3D (Tinkercad):

To avoid buying too much or too little wood, we created a quick 3D sketch in Tinkercad (Autodesk) before heading to the store. It took us less than 10 minutes, and it allowed us to visualize the gate placement, test the picket spacing, and get an accurate headcount for all the wood!

https://www.tinkercad.com/things/dy9Z1TZ1rYK-wood-fence?sharecode=6O4Ff1jMGosLkPCgRLPKl7dihd9GEZ1OU1S_GHunVAU

Once you have your materials and plan ready, it’s time to make your cuts! Getting all your pieces measured and cut upfront makes the actual assembly go so much faster—it feels like assembling a giant wooden puzzle.

The Cuts You'll Need:

1. 28 Vertical Pickets: Trim all 28 pickets to an equal height of 100 cm (40”).
2. Horizontal Rails: Cut 2 long rails to 245cm (8’) for the fixed panel, and 2 short rails to 145cm (4.75’) for the gate section.
3. Wall Posts: Cut 3 posts to 100cm (40”). These will be mounted directly to the side walls.
4. Ground Post: Cut 1 longer post to 140cm (55”). Keep this one longer because part of it will be buried in the ground to anchor the gate center!

If you're using a miter saw or worktable clamp a wood block at the 100cm mark. That way, you can just slide each picket up to the block and cut without having to measure each of the 28 boards individually as we did.

Quick Pre-Prep: Before moving on, give any rough cut edges a quick pass with sandpaper (120 grit). Trust us, it’s a lot easier to smooth out splintery edges now than after the fence is built!

Now comes the fun part: turning those individual boards into actual fence panels! Building the panels flat on the ground is WAY easier than trying to hold boards straight in mid-air.

Setting Up the Frame:

1. Lay two horizontal rails parallel to each other on the ground, spaced about 60cm apart.
2. Place your very first vertical picket at the edge of the rails.
3. Check with a spirit level to make sure everything is square, then secure the picket using 2 exterior screws per rail (4 screws total). If you want it extra secure you can add more screws.

The Magic "Spacer Board" Trick:

Measuring a gap for every single one of those 28 pickets would take forever (and drive anyone crazy). Here is how we got perfectly uniform spacing in half the time:

1. Take a spare vertical picket and place it flat right next to the board you just screwed down. This acts as your moving spacer!
2. Place your next picket snug against the spacer board.
3. Drive two screws into the top rail and two into the bottom rail to lock it in place.
4. Lift your spacer board out, slide it to the right of the newly attached picket, and repeat!

Just keep moving your spacer along as you go. Before you know it, you’ll have a clean, perfectly spaced fence panel without using a tape measure even once!

A fence is only as strong as its posts! For our 400cm (13.1’) opening, we used a smart 4-post system that made leveling the gate 100 times easier:

The 4-Post Layout:

1. Fixed Fence Side Wall Post: Mounted directly to Wall A.
2. Center Ground Post: Buried 40cm into the ground in the middle to anchor the end of the fixed fence panel.
3. Gate Side Wall Post: Mounted directly to Wall B on the opposite side.
4. Gate Frame Post: Attached directly to the gate panel itself, which hinges directly off the Gate Side Wall Post!

How to Mount the Wall Posts:

1. Hold your post against the wall and use a spirit level to make sure it’s 100% plumb.
2. Mark your hole locations on the wall through the wood.
3. Drill pilot holes into the masonry using a masonry bit, insert heavy-duty wall anchors, and drive in your exterior lag screws.

Installing the Fixed Panel:

Lift your pre-assembled main fence panel into place, level it, and screw the horizontal rails directly into the Wall A post and the middle Ground Post.

Tip: Don't skip the spirit level here! If your posts are even slightly crooked, your gate won't close smoothly later on.

Now that your structural posts are anchored, it's time to lift and mount the main fixed panel you assembled in Step 4!

1. Position and Level:

1. Lift your pre-assembled 245cm main panel into position between Wall Post A and the middle Ground Post.
2. Use small wood shims underneath to elevate the panel slightly (about 2–3 cm off the ground) so it doesn't absorb moisture directly from the soil.
3. Place your spirit level on top of the horizontal rails to ensure the panel is 100% level.

2. Securing the Panel:

1. Drive 3-4 heavy-duty exterior screws through the end of each horizontal rail directly into Wall Post A.
2. On the opposite end, drive screws through the rails directly into the Center Ground Post.
3. Double-check that all connections are rock-solid and the panel doesn't wobble.

Tip: Having two people for this step is essential—one person holds the panel firmly against the level while the other drives the screws!

Now for the star of the show: the gate! Instead of trying to level heavy hinges in mid-air or screw them into a thin board edge, we used our Double-Post Hinge Trick to make hanging the gate completely foolproof.

Building the Gate Panel:

1. Assemble the Panel: Assemble your gate panel using the remaining pickets and short 145cm (4.75’) horizontal rails, just like you did in Step 4.
2. Attach the Gate Post: On the hinge side of the gate panel, attach a full 2x4 vertical post directly to the end of the horizontal rails. This gives your gate its own solid structural edge!

Hanging the Gate:

1. Mount Hinges to the Wall Post: Screw your heavy-duty hinges onto Wall Post B (the post already anchored to the wall from Step 5). Attaching them to the fixed wall post first gives you a stable baseline!
2. Prop and Align the Gate: Place a few scrap pieces of wood on the floor to prop up your gate panel about 2–3cm off the ground. Slide the gate into position so its dedicated post sits flush against Wall Post B at a 90-degree angle.
3. Secure Hinges to the Gate: With the gate resting level on the scrap wood, drive your screws through the open hinge leaves directly into the gate panel’s post. Remove the scrap wood underneath—and voilà!

The Result: When the gate closes, the two posts sit flush against each other for a super sturdy "double-post" look

Adding the Latch: Finish by attaching your gate latch between the middle ground post and the closing edge of your new gate.

Now that your fence is fully built and installed, it’s time to give it a clean, polished look and protect it from the elements! Since pine is a soft wood, sealing it properly is essential so it doesn't warp, split, or rot when exposed to rain and sun.

1. A Quick Final Sanding:

If you want a more profesional finish give the entire fence a quick pass with 120 to 180-grit sandpaper (or an orbital sander if you have one). Focus on rounding off sharp edges and smoothing out any pencil marks, smudges, or minor splinters left over from assembly.

2. Applying the Protective Wood Oil:

1. Wipe away all sanding dust using a dry cloth or brush.
2. Apply a generous coat of weatherproof wood oil using a paintbrush or clean rag.
3. Work the oil into the wood grain, making sure to get into the narrow gaps between the pickets and around all the screw heads.
4. Let it absorb for a few minutes, then wipe off any excess drips with a cloth for a smooth, uniform finish.

Tip: Pay extra attention to the bottom end-grain of the vertical pickets near the ground! End-grain acts like a sponge for ground moisture, so giving those bottom edges an extra coat of oil will keep your fence rot-free for years.

And that’s a wrap! What started as an empty, messy space is now a defined, functional backyard with a built-in gate. Our dog now has a designated spot, and we can finally grow fresh grass without any muddy paws destroying it!

Best of all? Our dad was completely blown away by the surprise! Seeing his reaction made every single minute of work 100% worth it.

Top Lessons Learned (So You Don't Make Our Mistakes):

1. Make a checklist BEFORE heading to the store: We ended up making 3 separate trips to Home Depot because we kept forgetting screws, wall anchors, and extra drill bits. Save your gas money!
2. Don't skip the 3D model: Using Tinkercad beforehand allowed us to buy exact lumber lengths and minimize wood waste.
3. Invest in good hardware: Using exterior-grade screws and heavy-duty hinges will save you from sagging gates and rusty hardware down the road.

Thank you for reading! If you enjoyed this build or have any questions about making your own fence, let us know.