What this covers
A sunroom is an addition built mostly of glass. A three-season room has single-pane or lightly insulated glass and no heat; a four-season room is insulated, heated and cooled like any other room. The work includes the foundation or deck structure, framing, the window and door system, roof, electrical, flooring and, for year-round rooms, insulation and HVAC.
When to call
- A back of the house that gets good light and a view worth sitting in.
- A wish for garden space that is usable in cool weather and rain.
- A deck or patio that could be enclosed.
What to expect
- DesignThree-season or four-season, size, roof style, glass and door choices, and how it connects to the house.
- Foundation and structureFootings or a reinforced deck, then framing and roof.
- Glass and systemsWindows and doors are installed, then electrical and, for four-season rooms, insulation and HVAC.
- FinishFlooring, trim, ceiling and paint, then a walk-through.
Get a certified company
Look up a certified company by ZIP code. Every company's license, insurance and trades are verified before it is listed, and placement is never paid.
Questions people ask
Three-season or four-season?
Three-season rooms are simpler and used in spring, summer and fall. Four-season rooms are built as real living space with insulation and heat and are used all year. The choice drives the glass, structure and permits.
Will it get too hot?
Orientation, glass coatings, shades and ventilation control heat. The design step considers which way the room faces.
Can an existing deck be used?
Sometimes, if it was built to carry the load. Often the footings need upgrading, which the company checks first.
Related: Room additions · Porcelain tile flooring · Exterior painting · All remodeling
This page describes what the service involves. The company you hire sets the scope, the schedule and the price, and your contract is with that company. We verify credentials and collect reviews from real jobs. We do not guarantee any company's workmanship. Safety steps are general guidance. When in doubt, leave the home and call 911.