Yes, to build muscle tissue effectively, you generally need to be in a calorie surplus. This means consuming more calories than your body burns in a day. The extra calories provide the energy necessary for muscle repair and growth after strength training.
However, it's important to balance your calorie intake to avoid excessive fat gain. Aim for a moderate surplus of about 250-500 calories per day and focus on consuming nutrient-dense foods rich in protein, healthy fats, and complex carbohydrates