Paint, carpet and a sofa can make almost any basement look finished. Whether it counts as living space, to a building inspector, an appraiser or the next buyer, is decided by things that are much harder to change afterwards. Three of them are worth checking before any money goes into design: a way out, enough headroom, and a dry structure. If a basement passes all three, the rest of the project is a matter of taste and budget. If it fails one, that problem becomes the project.
Check one: a second way out
A finished basement, and above all a basement bedroom, needs an emergency escape route that does not depend on the interior stairs. In practice that means a door to the outside or a window large and low enough for a person to climb through, opening onto a window well that a person can also climb out of. The residential building code sets the minimum opening size, the maximum sill height and the dimensions of the well.
Walk around the outside of the house and look at each basement window from the yard.
- Is there already a walk-out door or a full-size window? If so, the hardest part may be done.
- If the windows are small and high, is there a wall where a larger opening could be cut without running into a deck, a stoop, a gas meter or the neighbor's side yard?
- Which way does the ground slope at that wall? A new window well has to drain, or it becomes a bucket against the foundation.
Cutting a new opening in a foundation wall is structural work. It needs an engineer's or experienced contractor's input and it needs a permit. It is also frequently the single item that turns a storage basement into a legal bedroom, which is why it belongs at the top of the list.
Check two: headroom under everything
Ceiling height is measured to the finished surfaces, and the code allows less clearance under beams and ducts than it requires for the room as a whole. So the question is never only "how tall is the basement?" It is "how tall will it be once there is flooring down and drywall up, and what is hanging below that?"
Take a tape measure and record three numbers: slab to the underside of the joists, slab to the lowest beam, and slab to the lowest duct or pipe. Note where the low points fall on the plan. A duct trunk running down the middle of the future family room is a design problem. The same trunk running along a wall can disappear into a soffit above built-in shelving.
Ducts and pipes can sometimes be rerouted, and that is far cheaper to do before framing than after. Lowering a slab to gain height is possible too, but it is a major structural undertaking and seldom the first choice.
Check three: is it dry, and has it stayed dry?
Finishing materials hide moisture and are damaged by it, a poor combination. Before covering anything, establish how the basement behaves through a full range of weather.
- Look for a tide line of white mineral deposits on the walls or staining at the base.
- Check the corners and the joint where the wall meets the floor after heavy rain.
- Outside, see where the downspouts discharge and whether the soil slopes away from the house.
- Ask previous owners or neighbors, if you can, whether water has ever come in.
Most dampness starts with roof water and grading, and those are fixed outdoors. A sump, an interior drain or a dehumidifier may still be part of the answer, but they should be chosen after the outside has been put right. Whatever is needed, it comes before framing.
What these three checks do to the budget
Two basements of the same size can produce very different estimates, and these checks explain most of the gap. One has a walk-out door, a high ceiling and a dry slab, so the money goes into rooms and finishes. The other needs an egress window cut, a duct trunk moved and drainage corrected before the first stud goes up. For a fuller account of how those factors and the layout decisions that follow feed into the price, read What Finishing an Alexandria Basement Involves: Cost Factors, Planning and Layout Ideas.
The same thinking applies to other under-used parts of a house. An earlier article here looks at turning an attic into living space, where headroom and escape routes matter just as much, and another covers selecting building materials for a renovation, which is especially relevant below grade.
Permits for a finished basement
Fairfax County, which covers Franconia, Rose Hill and the other Alexandria-addressed communities southwest of the city, lists finished basements among the interior alterations that need a permit. New or relocated electrical and plumbing fixtures are on the same list. Applications are made to Land Development Services through the county's PLUS system. Properties inside the City of Alexandria use the city's APEX permitting system. The plan reviewer in either office is the authority on the exact egress and ceiling requirements for a particular house, and asking early costs nothing.
Who can assess all three at once
Egress involves structure and excavation, headroom involves mechanical work, and moisture involves drainage inside and out. A firm that designs and builds can look at all three in one visit and say how they interact. Vale Construction, based in Alexandria, is a licensed and insured design-build remodeling contractor whose specialties include basement remodeling as well as kitchens, bathrooms and home additions. It holds a Virginia Class A contractor license and has been licensed in the state since 2007.
Driving from Franconia Elementary School to Vale Construction
Franconia Elementary School on Beulah Street makes a handy landmark for the Franconia side of this area. The map runs from the school to the Vale Construction office on Alexander Avenue.
Vale Construction
6020 Alexander Ave
Alexandria, VA 22310
(571) 474-1920
Basement questions people ask first
Does a basement family room need an egress window, or only a bedroom?
Requirements differ by how the space is used and by what exits already exist. Put the question to the plan reviewer with a sketch of your layout before finalizing the design.
My basement has never flooded. Do I still need to worry about moisture?
Flooding and dampness are different problems. A basement can stay free of standing water and still be humid enough to damage finishes, so check both.
Can I finish part of the basement and leave the rest?
Yes, and it is often sensible. Leaving the mechanical area and some storage unfinished keeps equipment accessible and concentrates the budget where people will spend time.