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Most garage demolition projects take one to three days to complete. Detached garages require one to two days total—one day for demolition and another for cleanup and waste removal. Attached garages take at least three days due to the additional care needed to protect the connected home structure. 

Factors affecting the timeline include garage size, construction materials, site accessibility, and weather conditions. Professional crews can complete projects much more quickly than DIY approaches.

Clear everything from your garage well before the scheduled demolition date. For temporary storage, consider renting a portable storage container, using a self-storage facility, or designating space elsewhere on your property. Remember that demolition contractors won't handle personal belongings, and leaving items behind can delay your project and potentially incur additional charges.

The impact on your home's value depends on your plans for the space after demolition. Removing an old, dilapidated garage to build a modern replacement often increases property value. However, eliminating garage space without replacement could decrease value in neighborhoods where garages are standard features. Before proceeding, research comparable properties in your area and possibly consult with a real estate professional to understand the potential impact on your specific market.

Start by obtaining multiple quotes from licensed and insured demolition contractors. Ask for references from previous clients with similar projects and verify their credentials through your local building department. Reputable demolition contractors will provide detailed written estimates, explain the demolition process, discuss permit requirements, and outline their waste disposal methods.