As mentioned above after signed and sealed construction documents are submitted to the town you may have to wait up to 20 business days for the review and if any comments are made during this period modification to drawings maybe required if the building official is not satisfied. Some towns are more difficult than others. It is not a uniform process even though it should be. However once the permit is secured your contractor can commence working. The times is based on many factors so to pin down an exact time is difficult. Some items that impact the timing are:
- Size and scope of your project
- Material availability
- General Contractor and Sun-contractor availability
- Coordination and decision making.
If a contractor is hired, and is very busy, the start date will be farther than a contractor who is not as busy with work. The materials used will vary the time frame based on the degree of labor intensity. A brick house will take longer to build than a vinyl siding house; more labor intensive, the longer it will take to build. A typical residential addition on a house can take about 2-6 months to complete.
As the project progresses the General Contractor could be held up by the town since inspections are required during the process, footing inspections, framing inspections etc. You will see the framing go up very quickly and it will wow you but then it all slows downs. Most framing can take a couple of days to 1 week depending on the size of the addition/house. Installing sheathing, windows, doors, flashing, a day or two. Siding and insulation, another several days (it all depends on the size of the project. The largest time frame on a residential house is the interior. There will need to be rough plumbing, electrical, HVAC installation, which can take 1-2 weeks. There will be sheet rocking, & painting, which will take nearly 1 week. Trim work, Cabinetry, installing fixtures, tile work, wood flooring or carpets, etc. Can be another 2-3 weeks.