With parking spaces at a premium, Nationwide estimates that building a garage can add as much as 11 per cent to the value of your property. This value will be dependent on where you live and could be even more in busy towns and cities. Everyone likes having a guaranteed space for the car and supplies. For this reason, detached or attached garage models that complement the exterior design of newly built houses are always necessary. For existing homes, if you want to have a garage in your home, you must have space on the property and then choose from many different models and material options..