Get an INSTANT estimate of the cost to Install an Exterior Door! Our free calculator uses recent, trusted data to estimate costs for your Exterior Door Installation project. For a basic 1 door project in zip code 47474, the benchmark cost to Install an Exterior Door ranges between $354.83 - $603.45 per door.To estimate costs for your project: 1.or a basic 1 door project in zip code 47474, the benchmark cost to Install an Exterior Door ranges between $354.83 - $603.45 per door.