Fencing for a Half-Acre Yard
Free calculator with pre-filled dimensions • Updated March 2026
A half-acre lot perimeter (roughly 400 linear feet) needs 51 posts, 100 rails, and 800 pickets for privacy fencing.
Open calculator with these dimensions →Fencing a Half-Acre Yard
A half-acre lot (21,780 sq ft) has a perimeter of about 400 linear feet. At this scale, material choices significantly impact your total cost. Wood privacy fencing runs $4,000–$6,000 for DIY, while vinyl doubles that.
Wood vs. Vinyl Cost Comparison (400 ft)
| Wood (PT Pine) | Cedar | Vinyl | |
|---|---|---|---|
| Materials | $3,800–$5,800 | $5,200–$8,000 | $8,000–$14,000 |
| Professional install | $8,000–$14,000 | $10,000–$16,000 | $12,000–$20,000 |
| Lifespan | 15–20 years | 20–30 years | 30–50 years |
| Maintenance | Stain every 2–3 years | Stain optional | None (hose clean) |
Pro Tips
- At 400 feet, negotiate bulk pricing. Lumber yards offer 10–15% discounts on orders over $2,000. Ask for contractor pricing even as a homeowner.
- Rent a power auger ($60–$100/day). Digging 51 post holes by hand is days of brutal labor. A 2-person auger with a 6" or 8" bit does each hole in 30 seconds.
- Consider partial fencing. If budget is tight, fence the backyard only (typically 200–250 ft) and add the front/sides later. Privacy where you use the yard most is the priority.
Frequently Asked Questions
How much does it cost to fence half an acre?
DIY wood privacy fence for a 400-foot perimeter costs $3,800–$5,800 in materials. Professional installation runs $8,000–$14,000. Vinyl is roughly double the material cost but lasts 30–50 years with zero maintenance.
How many fence posts for half an acre?
With standard 8-foot spacing, a 400-foot perimeter needs about 51 posts plus gate posts. Budget 110 bags of 80-lb concrete (2 per post) for setting them.