The first thing a fence contractor learns in Chatsworth is that the ground fights back. This is sandstone country, the Chatsworth Formation, and the same boulder outcrops that made Stoney Point a climbing landmark run right under the yards along the foothill edge. A post hole here does not always mean a shovel and an auger. It often means hitting rock a foot down and switching to a coring bit or a rock drill to reach honest depth. It is the hardest digging of any town in the valley, and it is the reason we quote footings on site rather than by phone.
Chatsworth is also horse country. The equestrian and horse-keeping pockets around Twin Lakes and the foothill fringes sit on larger acreage with long rural driveways, and those properties want a different fence than a tract backyard: three-rail ranch fence for the look and the sight lines, pipe corral where a horse leans, and no-climb wire woven behind the rail to keep hooves and predators where they belong. We build that rail run to hold a straight line across uneven ground, and we set the gate posts deep enough that a wide driveway gate never sags.
Fire and wind decide the rest. Chatsworth sits in a Very High Fire Hazard Severity Zone, and the 1971 Chatsworth Fire that ran through these hills is the reason defensible space is taken seriously here. Near the structure we push homeowners toward non-combustible material, tubular steel, iron, or block, and hold the solid wood out in the yard. Then there is the wind: Santa Ana gusts funnel hard through Santa Susana Pass and carry dust with them, so posts and gates are set for gust load, not just for looks. A six foot solid fence is a sail, and it is only as good as the footing under it, which brings the whole job back to the rock.
Height follows the ground here. Nearer the Santa Susana foothills a parcel usually falls inside a designated Hillside Area, where six feet is the ceiling, while a wider lot out on the flat can take eight.