The timeline for a home addition depends on the project’s complexity and size. Generally, a typical home addition takes about 4 to 6 months to complete. Smaller projects might be finished in as little as 3 months, while larger or more complex additions can take up to 9 months or more. This timeline includes the design phase, obtaining permits, construction, and final inspections. Delays can occur due to weather, material availability, or unexpected structural issues.