Detached garages typically cost more than attached garages, though the price difference depends on several factors. A detached structure requires its own foundation, roof, walls, and electrical systems, which increases material and labor costs compared to an attached garage that shares a wall and foundation with the main house. Additionally, detached garages often need their own driveway approach and may require separate permits or inspections depending on local building codes.
The cost premium varies by region and situation. In some areas, adding a detached garage costs 20-40% more than an attached garage of similar size. However, a detached garage can offer advantages that may justify the expense: it doesn't reduce usable living space in the home, it eliminates direct access between living areas and vehicles (which some homeowners prefer for climate or pollution control), and it may be easier to expand or modify without affecting the main structure.
Detached garages also present trade-offs in convenience—you'll need to walk outside in bad weather to reach your vehicle. Building codes sometimes make detached garages easier to construct, as they face fewer restrictions on placement and setbacks compared to additions to the main house.
When considering cost, factor in the square footage, local labor rates, materials, site conditions, and whether you're building new or renovating. Getting quotes from local contractors will provide the most accurate pricing for your specific situation.