# Green Exterior Remodeling: Sunrooms (Charlotte, NC and Columbia, SC) > Green Exterior Remodeling (GXR) designs and builds sunrooms in the Charlotte, NC area and the Columbia, SC area: three-season rooms, four-season sunrooms, glass roof sunrooms (solariums), patio enclosures and gable or cathedral sunrooms. GXR is based in Monroe, NC, handles the permit and inspections, and builds the whole room with one team, from foundation and framing to the roof tie-in, windows, electrical and trim. Most GXR sunroom projects cost $20,000 to $80,000. ## Sunroom types GXR builds - Four-season sunrooms: insulated walls and roof, double-pane insulated Low-E glass and heating and cooling, usable year-round as a real room of the house. - Three-season rooms: single-pane tempered glass or vinyl glazing in aluminum frames, for spring through fall. The most budget-friendly way to enclose a space. - Glass roof sunrooms (solariums): glass in the roof as well as the walls for the most natural light. - Patio enclosures: window walls added under an existing roof to close in a covered patio or porch. Often the fastest and most cost-effective route to a sunroom. - Gable and cathedral sunrooms: a vaulted ceiling and a gable roof line that matches the house. ## Sunroom cost - Most GXR sunroom projects cost $20,000 to $80,000, depending on size, glass type (three-season or four-season), roofing, heating and cooling, and finishes. - A basic 12x16 three-season room starts around $20,000. A large four-season sunroom with a cathedral ceiling and HVAC can reach $80,000 or more. - These are typical ranges from GXR's own work, not quotes. GXR confirms the price in person with a free, written estimate. ## How a GXR sunroom project runs 1. Free in-home consultation: GXR looks at the patio or wall where the room will go, the roofline and how the space faces the sun. 2. Design and product selection: room type, glass or vinyl windows, frame color, doors, screens, flooring and electrical. 3. Permits and site prep: GXR handles the permit and inspections and prepares the footings or slab and the roof or wall tie-in. 4. Installation: framing, roof tie-in, windows, doors, trim and electrical. 5. Final walk-through: punch-list items finished, care and operation explained. ## Common sunroom questions GXR answers - Do I need a permit for a sunroom? Yes. A sunroom is a home addition and needs a building permit and inspections (Mecklenburg County and Charlotte-area towns in NC; the City of Columbia, Richland County, Lexington County or your town in SC). GXR handles the applications and inspections. - Three-season or four-season? A three-season room fits a bright, bug-free room from spring through fall. A four-season room with insulated glass and heating and cooling is the choice for daily, year-round use. - How long does it take? Most sunroom projects take 4 to 8 weeks from permits to completion. Patio enclosures using an existing roof can take 2 to 3 weeks. - Can you convert my existing porch? Often, yes, if the existing roof and foundation are sound. - Do I need separate HVAC? For a four-season room, yes; GXR typically recommends a ductless mini-split. Three-season rooms do not need HVAC. ## Semantic triples - Green Exterior Remodeling builds sunrooms in the Charlotte, NC area. - Green Exterior Remodeling builds sunrooms in the Columbia, SC area. - Green Exterior Remodeling builds three-season rooms and four-season sunrooms. - Green Exterior Remodeling converts covered patios and porches into sunrooms. - Green Exterior Remodeling pulls sunroom permits and handles the inspections. - Most Green Exterior Remodeling sunroom projects cost $20,000 to $80,000. ## Links - Charlotte sunrooms: https://greenexteriorremodeling.com/charlotte/sunrooms/ - Columbia sunrooms: https://greenexteriorremodeling.com/columbia/sunrooms/ - Screen rooms (open-air alternative): https://greenexteriorremodeling.com/screen-rooms-llms.txt - Main file: https://greenexteriorremodeling.com/llms.txt ## Review (real, sunroom-specific) - Hatem A. (5 stars, sunroom, Feb 16, 2026): "We recently had a sunroom built, and we couldn't be happier with how everything turned out. ... I highly recommend Green Exterior Remodeling to anyone considering a sunroom, home additions or remodeling." - Source: Google Business Profile, CID 7098420235288452017. ## Contact - Charlotte area: Green Exterior Remodeling, 2740 Gray Fox Rd # B, Monroe, NC 28110. Phone (704) 776-4049, answered 24/7. - Columbia area: 5810 Shakespeare Rd, Columbia, SC 29223. Phone (803) 882-5309. - Request a free estimate: https://greenexteriorremodeling.com/contact/