How much does a home addition cost in Virginia?

We do not quote a dollars-per-square-foot figure here, because no Virginia primary source publishes a dated one we could verify. What can be sourced is how the permit is priced and how to get a quote that is fair to compare.

What drives the price

Size and shape. More floor area costs more, but a simple rectangle on a slab costs far less per square foot than a two-storey addition with a complicated roof.

Foundation and site. A sloping lot, poor soil or buried utilities add excavation and structural work. A crawlspace, a slab and a basement are different jobs.

Tying into the house. Opening an exterior wall, matching the roof, siding and windows, and rerouting wiring and ducts all add labor in the existing house.

What is inside. A bedroom is the cheapest use of space. Kitchens and bathrooms add plumbing, cabinets, tile and fixtures, and they usually dominate the budget. See what building a home addition involves for the full sequence.

Heating and cooling. If the existing system cannot carry the new rooms, equipment or a separate system is added to the price.

Finishes and design. Window size, ceiling height, flooring, trim and exterior materials move the total more than most owners expect.

Permit fees are set locally

Each locality publishes its own schedule. Montgomery County, for example, lists residential construction, including additions, at $0.22 per sq. ft. with a minimum fee of $45 when we checked on October 26, 2026.^[1] The county says fees are based on Gross Building Area, the total square footage of each floor including the basement and all exterior structures,^[1] and it also lists a technology fee of 2% of fees.^[1] Trade permits for electrical, plumbing and mechanical work are priced separately. Other counties and cities charge differently, so ask your own building department, and ask each contractor whether permits are in their price.

Getting quotes you can compare

Ask every contractor to price the same plans, and ask for a written proposal that lists the work included and excluded, the materials and the schedule. Virginia's Board for Contractors requires a residential contract to include a statement of the total cost of the project, the amounts and schedule for progress payments including a specific statement on the amount of the down payment, and the contractor's licence number and class.^[2]

Check these items in each quote:

• who draws the plans and whether that fee is included
• permits, inspections and engineering
• allowances for items you have not chosen yet, such as tile, fixtures and appliances, with the allowance amount
• demolition, debris removal and temporary protection of the rest of the house
• electrical, plumbing and heating and cooling work for the new space
• insulation, drywall, painting and flooring
• how change orders are priced and approved

DPOR's consumer guide says to make sure clearly worded and signed change orders reflect all changes to the original, signed contract,^[3] and gives a rule of thumb of an initial deposit of no more than 10% of the total price or $1,000, whichever is less, unless the job requires custom-made items or special orders.^[3] Be cautious of a contractor who asks for far more up front.

When to call a licensed pro

For the whole job. Virginia licenses contractors by contract size: Class A contractors handle a single contract of $150,000 or more, Class B $30,000 or more but less than $150,000, and Class C over $1,000 but less than $30,000.^[4] Check the licence with DPOR before signing; how to check a contractor's licence walks through it. If you are deciding who draws the plans, read do you need an architect for a home addition in Virginia.

Browse remodeling services or more remodeling answers, then describe your addition once and licensed local businesses will quote it.