4.) Garage Addition: This is another project that should be tackled only under the awareness that the average regain will average just above 62%. The average cost of such a project will amount to more than $58,000. Garage additions are labor intensive – They involve slab work, roofing, new siding, paint, doors, etc. Erecting a garage addition only differs from new home building in that it does not require insulated walls for HVAC purposes. Essentially, the garage addition process is no different than the building process of assembling a miniature house.

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