The steps to build a home addition

The steps in order

1. Decide what the addition must do. A bedroom, a suite, a bigger living space, a bath.
2. Visit to your lot, survey and plans. A drawing of the addition and a site plan or survey of the lot.
3. Engineering. Structural design where the addition connects to the house.
4. Written estimate and contract.
5. HOA approval, if you have one.
6. Permits.
7. Lot preparation and foundation.
8. Framing, roof and dry-in. Walls, roof, windows and doors, so the structure is closed to the weather.
9. Rough-in and inspections. Plumbing, electrical and mechanical lines, then inspection.
10. Insulation, drywall, interior finishes and tie-in to the existing home.
11. Final inspection, punch list and walk-through.

We give no number of weeks here. An addition's schedule depends on size, design, permit review and inspections. Your written estimate should state a timeline.

Steps 1 to 4: plans, survey and engineering

Manatee County's FAQ says the "Residential" permit category requires building plans and a site plan or survey. So the drawings and the survey come first. Our guide to the site plan for a building permit explains what it shows.

Setback and lot coverage limits depend on your zoning district and your lot. They decide how big the addition can be and where it can sit. Ask the county's permitting office before you design. Do not assume a neighbor's addition tells you what your lot allows.

An addition also needs structural engineering where it connects to the house. Hildebrand's pricing page says structural engineering, permit-ready plans and every county permit are written into the scope, not billed as a surprise line later.

Spend time on the design. It is cheaper to move a wall on paper than after it is framed. Ask to see the plans in a form you can read, with room sizes marked, and walk through them room by room, imagining a normal day. Where does the door swing? Where does the furniture go? Where does the light come from? Questions like these are best answered before the permit is filed.

Steps 5 and 6: HOA and permits

If you live in an HOA, the HOA application is yours to file. The contractor can provide specs and drawings for it. Start early, because the HOA may take time to answer.

Then the permit. Manatee County's permit types include Residential, Electrical, Plumbing and Mechanical, among others. Which ones your addition needs depends on the design. If the house is inside the City of Bradenton or the City of Palmetto, those cities run their own building departments. See our guide to room addition permits in Manatee County. Hildebrand pulls every required permit.

A permit does not last forever. Manatee County says a permit expires after 180 days if no required inspections have been approved. That makes the schedule between permit and first inspection matter.

Steps 7 to 9: foundation, framing and rough-in

The ground is prepared and the foundation is placed. Then the walls are framed, the roof goes on and windows and doors go in. This is called getting the addition "dried in." After that, work inside can continue even if the weather is bad.

Next the plumbing, electrical and mechanical lines are run inside the open walls. Hildebrand's plumbing and electrical are done by licensed trade partners that Hildebrand manages and coordinates. The inspector checks the work before it is covered. Inspections are also how the permit moves forward.

Steps 10 and 11: finish and tie-in

With the rough work approved, the walls are insulated and closed with drywall. Then flooring, paint, trim, cabinets and fixtures go in. The step people forget is the tie-in: where the new space meets the old one, floors, ceilings, walls and the air conditioning have to line up. A good tie-in is invisible. A bad one shows for years.

The final inspection comes next. Manatee County's permitting page says a project is complete only after it passes final inspection, fees are paid and all conditions are met.

Flood zones and big projects

Manatee County's FAQ says any alteration to a building, grade change or fill in the floodplain requires a permit. If your home is in a flood zone, ask about the county's substantial improvement rule early. The county's floodplain page says substantial improvement uses a 50 percent figure measured against market value before the work starts. Read our guide to the Manatee County substantial improvement rule and our flood zone lookup guide to check your home.

Questions to settle before you hire

• What does my lot allow? Zoning and lot rules decide size and placement. Ask the permitting office, not a neighbor.
• Does my HOA need to approve it? If yes, file early. The homeowner files, and the contractor supplies drawings.
• Am I in a flood zone? If so, the rules get stricter. See the section above.
• How will the new space connect to the old one? Ask about floors, ceilings and walls where they meet.
• Can the existing air conditioning serve the new room? Ask the contractor. The answer may change the scope.
• How will I live in the house during construction? See living at home during a remodel.

A contractor who answers each of these in writing before you sign is showing you how the job will go.

How Hildebrand runs a home addition

Hildebrand builds room additions, bump-outs and second-story additions under one licensed contractor. The five steps are the same as on every project: a free in-home consultation, a written estimate and plan, permits and schedule, the build, and a final walk-through with a written workmanship warranty. The company pulls every required permit and meets the Florida Building Code inspections.

Hildebrand's pricing page says every project is custom and quoted in writing after a free in-home visit. See the home additions page, the process and our home addition cost guide.

Questions homeowners ask