Drywalling a basement room is where a basement stops being storage and starts being living space. It is also a project where the materials list is longer than “some sheets” — compound, tape, screws, and corner bead all add up. This guide works out the full list and the total for a typical finished-basement room.
The assumptions: a rectangular room 12 ft by 16 ft with an 8 ft ceiling, framed and ready, with both the walls and the ceiling being drywalled. There is one standard door opening and no windows (common below grade). Framing, insulation, and electrical are already done and are not in this budget — this is the board-and-finishing stage only.
The headline numbers: 20 sheets of 4 × 8 ft drywall (or 13 sheets of 4 × 12), and roughly $310–$470 of materials all-in.
How many sheets this room needs
- Wall area: the perimeter is (12 + 16) × 2 = 56 ft, times 8 ft high = 448 sq ft.
- Ceiling: 12 × 16 = 192 sq ft.
- Total: 448 + 192 = 640 sq ft. Subtract the door opening (about 21 sq ft) and you have 619 sq ft to cover.
- In 4 × 8 ft sheets (32 sq ft each): 619 ÷ 32 = 19.3, rounded up to 20 sheets.
- In 4 × 12 ft sheets (48 sq ft each): 619 ÷ 48 = 12.9, rounded up to 13 sheets.
Materials list and cost
Priced for the 4 × 8 ft route. Typical US prices, checked November 2026 — the same figures used on our Drywall Calculator page. Materials only.
| Item | Quantity | Typical cost |
|---|---|---|
| Drywall sheet, 4 × 8 ft, 1/2 in | 20 sheets | $240–$360 ($12–$18 per sheet) |
| Joint compound, 4.5 gal bucket | 2 buckets | $30–$44 ($15–$22 each) |
| Drywall screws, 1 lb box | 3 boxes | $18–$27 ($6–$9 each) |
| Joint tape | 2 rolls | $6–$12 ($3–$6 each) |
| Corner bead, 8 ft | 4 pieces | $12–$24 ($3–$6 each) |
The finishing quantities follow common rules of thumb: about one 4.5 gal bucket of compound per 300 sq ft of board for taping plus two finish coats, and roughly a pound of screws per 200 sq ft. The 4 × 12 ft route prices out about the same — 13 sheets at $18–$28 is $234–$364 of board — so choose the size based on your stairwell, not the budget.
Total cost
Everything on the list comes to about $310–$470. Add one or two spare sheets if your supplier makes returns awkward — basement stairs are hard on drywall corners.
Hiring it out instead: professional hanging and finishing typically runs $1.50–$3.50 per sq ft of board area, which for this room’s 619 sq ft works out to roughly $950–$2,150, materials included. Drywall finishing is the stage where experience shows most, so that gap buys real quality, not just saved effort.
Calculate your own project
Our Drywall Calculator turns any wall-and-ceiling area into a sheet count for both sheet sizes. If you are still at the “how big is my room” stage, the Drywall Sheet Chart by Room Size gives sheet counts for common room sizes at a glance.
The job in six steps
- Solve moisture first. Never board over an active leak or chronically damp wall — fix water issues and confirm the basement stays dry, or the new walls will grow mold behind the paint.
- Check the framing: studs straight and on plane, blocking added where cabinets or a handrail will mount, rough-ins inspected if your area requires it.
- Hang the ceiling first, then the walls, sheets horizontal with staggered joints, using a lift or a helper — ceiling sheets are the two-person part of this job.
- Screw to the manufacturer’s pattern, dimpling each screw just below the paper without tearing it.
- Tape and first coat: embed tape in compound on every joint and corner, and let it dry completely.
- Finish coats and primer: two to three progressively wider coats, sand smooth, then seal everything with a drywall primer before paint — bare compound and paper absorb paint differently and will flash through without it.
FAQ
How many sheets if I skip the ceiling?
Walls only, minus the door, is 427 sq ft: 14 sheets of 4 × 8, or 9 sheets of 4 × 12. If the ceiling stays, check that what is up there now meets your local code for a finished room.
Does subtracting the door opening actually matter?
Sometimes. Without the subtraction, this room’s 640 sq ft still needs 20 sheets of 4 × 8 — but it needs 14 sheets of 4 × 12 instead of 13. On long sheets, one opening is the difference.
4 × 8 or 4 × 12 sheets for a basement?
The stairwell usually decides. A 4 × 12 sheet is about 75 lb and needs a generous turn at the landing; a 4 × 8 is about 50 lb and far easier to get below grade. Fewer seams is a real benefit, but only if the sheets arrive in one piece.
Should I use moisture- or mold-resistant board in a basement?
It is worth considering anywhere below grade, especially on exterior walls. It costs more per sheet but the sheet count is exactly the same — run the count here, then price the board type you choose.
Why two buckets of compound?
Taping plus two finish coats uses roughly one 4.5 gal bucket per 300 sq ft of board. At 619 sq ft that is a little over two buckets’ worth of work — buy the second bucket rather than stretching the first; running out mid-coat is how ridges happen.
What comes next
Finished drywall leads straight to primer and paint — our Cost to Paint a 12×12 Bedroom: Materials & Cost guide shows how that stage is budgeted for a smaller room. More step-by-step project budgets are collected in our Project Guides.
Estimates only: quantities come from the standard formulas shown on this page and prices are typical US ranges checked November 2026; your costs vary by region, store, and product. Confirm measurements and prices before buying. This page estimates materials for common DIY projects; it does not cover structural, load-bearing, electrical, gas, or plumbing design — for safety-critical work, hire a licensed professional.