Leg training at home suffers from a reputation problem - people assume bodyweight squats can't build real leg mass. They're right that easy bodyweight squats don't. But progressed properly - through pistol squats, jump squats, Bulgarian split squats, and Nordic hamstring curls - bodyweight lower body training produces serious results. The legs contain the largest muscles in the body and respond well to high-rep, high-tension work when gym equipment isn't available.
Quadriceps: Bulgarian split squats (rear foot elevated on a chair, front foot forward) create a deep stretch and significant load on the quads. Progress from bodyweight to holding dumbbells or a loaded backpack. Jump squats develop power and increase metabolic demand. Pistol squat progressions (from box squats to full pistols) build impressive unilateral quad strength.
Hamstrings: Nordic hamstring curls (kneel, anchor feet under a sofa, lower yourself forward controlling the fall) are one of the most effective hamstring exercises in existence - used by professional footballers worldwide. Romanian deadlifts with a loaded backpack or dumbbells if available build the posterior chain. Glutes: hip thrusts using a sofa as a bench develop the glutes through their full range of motion. Combine these movements into 3-4 sets each, train legs twice per week, and you'll build genuine lower body strength and size without any gym equipment.