Estimate Desk
Basement finishing cost estimate
Rec room, rec room with a bath, or a suite. Contingency is higher on a pre-1978 house. The band is a Kitsap planning range, about ±15%, not a contract price.
Default scenario
700 sf rec room, no egress window yet
$52,000 – $70,000
Rooms, surfaces, and fixtures. Many need a permit only when plumbing, circuits, or structure move.
Planning band
$52,000 – $70,000
About 26 working days on site. Not a bid.
Line items, notes and what is not in the band are below the form.
Planning bandLine items and notes
$52,000 – $70,000
Point total about $61,000 · about 26 working days on site
Material and labor of the unit-priced lines: Material $25,830 · Labor $31,570
Default scenario: 700 sf rec room, no egress window yet. Not a contract price. The band is the point total plus or minus 15%, a planning allowance we set for early estimates, not a measured accuracy. Prices include materials, labor, JKM overhead and fee, and 9.3% Washington sales tax. Working days on site are crew days. Design, permits and material lead times add calendar time before and between them.
| Item | Qty | Total |
|---|---|---|
| Rec-room finish | 700 sf | $57,400 |
| Permit allowance | 1 ls | $900 |
| Contingency (5%) | 1 ls | $2,915 |
Notes
- A 5% contingency is inside the point total. Hold more if the basement has never been dry.
- Egress, ceiling height under 7 feet, and a new drain line are the usual reasons this leaves the band.
Not in this band
- Hazardous-material abatement. Asbestos and lead are common on pre-1978 houses and are separately licensed work.
- Structural repair discovered after demolition.
- A new electrical panel, water service, or septic, unless that line is on this estimate.
- Design fees, except where a drawing line is shown.
- Financing and temporary housing. (Washington sales tax, 9.3%, is included in these prices.)
- Sump, French drain, and bulkhead stairs are not in this band.
Planning band for Kitsap County. Not a bid. A site visit sets the number.
What the basement estimate covers
The basement estimate prices the work of finishing a basement that already exists: framing, insulation, drywall, flooring, lighting and trim, plus the extra systems a bath or kitchenette brings. You enter the floor area and pick one of three scopes. A rec room is the simplest. A rec room with a bath adds plumbing and a fixture set. A suite with a kitchenette adds the equipment and finishes of a small living space.
The default is a rec room of modest size with no new egress window, so the first number you see is the plainest version of the job.
What moves the number
Area moves the price in a straight line. Scope moves it in steps, because adding a bath or a kitchenette changes the trades involved as well as the materials. The egress window is a switch of its own because cutting a new opening in a foundation wall is a separate piece of work, and whether you need one depends on how the space will be used and on the code.
The age of the house changes the contingency. The desk holds a smaller percentage on a newer house and a larger one on a house built before 1978, and it puts the line inside the point total instead of leaving it as advice.
Moisture comes first
A basement is only as good as its dryness. In a region with long wet winters, the first question is whether the space has ever been damp, and the estimate says so: a contingency is included, and you should hold more if the basement has never been dry. A sump, a French drain and bulkhead stairs are not in the band, because each depends on what the site visit finds.
What is not in the band
Beyond moisture work, the band leaves out hazardous-material abatement, structural repair found once walls are open, a new electrical panel or water service unless shown, design fees and financing. Washington sales tax is already included in the prices. Low ceiling height and a new drain line are the other common reasons a real basement estimate leaves the band, which is why we want to see the space before we commit to a figure.
Permits for basement work depend on the scope and on the office that covers your address. Our permit guides explain which of the Kitsap authorities issues yours.
Scope ladder
Basement finishing: three scopes compared
Each row is the Estimate Desk engine run on the inputs listed, so these numbers move whenever the desk does. They are planning bands, about ±15%, not bids.
| Scope and what was priced | Planning band |
|---|---|
Rec roomDesk defaultFinish the existing space as a rec room, with no new egress window and no bath.
| $52,000 – $70,000Point total about $61,000About 26 working days |
Rec room and a bathThe same space finished as a rec room with a bathroom added, still without a new egress window.
| $67,000 – $91,000Point total about $79,000About 26 working days |
Suite with a kitchenetteThe space finished as a suite with a kitchenette, including a new egress window.
| $90,000 – $122,000Point total about $106,000About 33 working days |
Questions
Basement finishing estimates: common questions
What does the basement estimate assume before I change anything?
The starting band, $52,000 – $70,000, is the default scenario (700 sf rec room, no egress window yet). It includes the finish work, a permit allowance and a contingency line that sits inside the point total.
Why is the basement contingency higher on a pre-1978 house?
Because moisture, wiring and finishes are often a surprise in an older house. The desk raises the contingency line when you mark the house as built before 1978, and the line shows its percentage so you can see what is being held.
What usually pushes a basement past the planning band?
A new egress window, a ceiling height under 7 feet and a new drain line are the usual reasons. A sump, a French drain and bulkhead stairs are not in the band at all.
Is a basement suite priced the same as a rec room?
No. The desk offers three scopes, a rec room, a rec room with a bath and a suite with a kitchenette, and it prices the suite with a longer schedule per square foot of floor area.
A site visit sets the number
Bring your result to the walk. We measure, check what is behind the walls, and replace the planning band with a written estimate.