Labor costs, based on last year's Iowa Farm Custom Rate Survey, added up to $15.05/hour for woven wire fencing and $16.25 for barbed wire. A straight quarter-mile stretch of new woven wire fencing will cost $2,553.31, or just shy of $2 per linear foot.t's a little less expensive than a woven-wire fence to build and has about the same average lifespan of around 20 years, Edwards says. The estimated $1,947.75/quarter mile cost of a 5-wire barbed-wire fence takes into account the following: 1  4 8-inch wood posts ($28 apiece).