How Much Fence for a 100×120 Yard?
A 100 by 120 foot yard (12,000 sq ft) needs 440 feet of fence to enclose all four sides, or 340 feet if your house covers one 100-foot side.
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Posts
46
Concrete
92
Pickets
1088
Rails
129
Est. Cost
$5,100–$8,500
Fence Footage for a 100×120 Yard
The perimeter of a rectangle is 2 × (width + depth). For 100 × 120, that is 2 × 220 = 440 feet. Most backyard fences only run three sides because the house closes off the fourth: one 100-foot back line plus two 120-foot sides, or 340 feet. If your fence returns to the house partway along the side, measure that actual run instead.
For a wood privacy fence on three sides you'd buy about 46 posts, 92 bags of concrete, 129 rails, and 1,088 pickets. Enclosing all four sides raises that to 58 posts and 1,408 pickets.
Cost to Fence a 100×120 Yard by Type
| Fence type | Posts (3 sides) | 3 sides (340 ft) | 4 sides (440 ft) |
|---|---|---|---|
| Wood Privacy | 46 | $5,100–$8,500 | $6,600–$11,000 |
| Vinyl | 46 | $6,800–$11,900 | $8,800–$15,400 |
| Chain Link | 37 | $2,720–$5,100 | $3,520–$6,600 |
| Picket | 46 | $3,400–$6,120 | $4,400–$7,920 |
| Split Rail | 46 | $3,400–$6,120 | $4,400–$7,920 |
Material estimates with one walk gate. Professional installation typically adds $5–$15 per foot.
Other Yard Sizes
Recommended Materials
Pressure-Treated Fence Post 4×4×8
Ground-contact rated, ideal for all fence types.
$12 – $18
Cedar Dog-Ear Picket 1×6×6
Naturally rot-resistant, smooth on one side.
$3 – $6
Quikrete 60 lb Fast-Setting Concrete
Sets in 20-40 minutes. No mixing required.
$5 – $7
Post Hole Digger – Fiberglass Handle
Heavy-duty clamshell digger for clean holes.
$35 – $55
Simpson Strong-Tie Fence Bracket
Galvanized L-bracket for rail-to-post connections.
$4 – $8
Decorative Post Cap 4×4
Copper-top cap, fits standard 4×4 posts.
$5 – $12