How much does a sunroom cost in Virginia?

There is no single price for a sunroom, because the range between jobs is wide. A screened porch that gets new windows is a small project. A new insulated, heated room with its own foundation is closer to a home addition. What follows is what moves the price, so you can read quotes and compare them.

What drives the price

Enclosing a porch or building new. An existing porch saves some work, but only if its footings, floor and roof suit a room. Localities set the footing for an enclosure: Spotsylvania County requires all exterior walls enclosing a carport to sit on continuous concrete footings 18 inches deep, and Roanoke County requires 24 inches.^[2][3] A porch is not a carport, but the point holds: what must be rebuilt depends on what your locality asks for and what the inspector finds.

Three-season or four-season. A three-season room with windows and no heating needs less work than one built for year-round use. For a heated room, the contractor has to deal with insulation, windows and heating. Spotsylvania County's carport enclosure details call for a wall insulation value of R-15, a ceiling value of R-60 and windows and doors with a U-factor of 0.30.^[2] Spotsylvania County also requires living spaces to be capable of maintaining a room temperature of at least 68°F.^[2] Whether your locality applies requirements like these to a sunroom is a question for your building department.

Glazing. Windows and doors set how much glass you buy and how the room performs. A room with many large panes of high-performance glass costs more than one with a knee wall and a few windows. Ask for the U-factor of each.

Foundation, roof and structure. Piers, a slab or a new framed floor, and a roof that is either a new one or tied into the house, make up most of the labor. See what enclosing a porch involves.

Heating, cooling and wiring. Adding a ductless unit, extending ducts or running new circuits adds to the bill, and Virginia requires a master tradesman licence as a condition of licensure for electrical, plumbing and HVAC contractors.^[4]

Permit. Fees are set by the locality. When we checked on October 26, 2026, Montgomery County's fee schedule charged residential additions and alterations $0.22 per square foot, with a minimum fee of $45, and added a 2% Virginia state levy and a 2% technology fee with a $10 minimum.^[1] Other localities charge differently. See do you need a permit to enclose a porch in Virginia.

Getting a quote you can compare

Ask two or three licensed contractors to visit and quote the same scope in writing. For each quote, ask:

• what the foundation and floor will be, and whether the existing porch is reused
• the insulation values, window type and U-factor
• how the room will be heated and cooled
• who pulls the permit and whether the fee is in the price
• the schedule, warranty and what is excluded

Virginia's Board for Contractors requires a residential contract to state the total cost, the amount of the down payment and the schedule of progress payments, and the contractor's licence number and class.^[5] Read what a Virginia home improvement contract has to include before you sign.

When to call a licensed pro

For the whole job. A Class C contractor covers a single contract over $1,000 but less than $30,000, and Class B covers $30,000 or more but less than $150,000.^[4] A firm's class also depends on the total value of its work in any 12-month period,^[4] so a larger firm may hold a higher class than your job needs. Check the licence before you pay a deposit.

For comparison, see how much a home addition costs in Virginia. Loclis lists DPOR-licensed remodelers with their licence number and class. Browse remodeling services or read more remodeling answers.

To get prices for your own porch or sunroom, describe the job once and licensed local businesses quote it.