Finish a Basement: calculators, shopping list & budget
Finishing a basement adds living space at a fraction of an addition's cost. The budget is mostly framing, insulation and drywall, with flooring and paint on top.
Work through the calculators in build order, then use the template to track spending per phase.
Finish a Basement budget & shopping list template
- • Printable PDF checklist with quantities, estimated prices and an "Actual" column
- • Editable Excel or Google Sheets budget that calculates totals automatically, including contingency and remaining funds
- • Step-by-step plan and notes page
Which calculators do I need for this project?
Step 1
Wall Stud Calculator
Estimate studs and plates for any framed wall.
Step 2
Insulation Calculator
Estimate insulation bags or batts by R-value.
Step 3
Drywall Calculator
Estimate sheets, screws, mud and tape for any drywall job.
Step 4
Paint Calculator
Estimate gallons of paint for any room — doors and windows subtracted.
Step 5
Vinyl Plank Flooring Calculator
Estimate LVP flooring in square feet and boxes.
Step 6
Baseboard Calculator
Estimate baseboard linear feet and sticks to buy.
Step 7
BTU Calculator
Estimate BTU for heating or cooling any room in your home.
Step 8
Wire Gauge Calculator
Estimate AWG wire size for any run and load.
How much does it cost?
400 sq ft basement, 80 linear ft of exterior wall, one partition wall. Estimated total: $4,326, or $4,758 with a 10% contingency.
| Item | Qty | Est. cost |
|---|---|---|
| 2x4 studs, 8 ft | 85 each | $383 |
| PT bottom plates, 2x4 8 ft | 12 each | $84 |
| Rigid foam board 2 in, 4x8 | 20 sheets | $760 |
| Drywall 1/2 in, 4x8 | 45 sheets | $720 |
| Joint compound & tape | 1 lot | $70 |
| Drywall screws, 5 lb | 2 boxes | $56 |
| Waterproof vinyl plank | 440 sq ft | $1,232 |
| Primer & paint, gallon | 8 gal | $280 |
| Baseboard, 8 ft | 14 each | $196 |
| Electrical boxes, wire & outlets | 1 lot | $250 |
| Drywall lift rental | 1 day | $45 |
| Permit & inspections | 1 each | $250 |
Want this as a printable checklist and a self-totaling spreadsheet? Get the template.
What are the steps?
- Fix moisture issues and get a permit.
- Insulate exterior walls with rigid foam.
- Frame walls and soffits.
- Rough-in electrical; pass inspection.
- Hang, tape and finish drywall.
- Paint, install flooring and trim.
Material guides for this project
How much does it cost to finish a 400 sq ft basement DIY?
Materials usually total $5,000 to $9,000 before bathroom or kitchen work, roughly $12-22 per sq ft.
What insulation is best for basement walls?
Rigid foam board against the concrete stops condensation; fill stud cavities with mineral wool if more R-value is needed.
Do I need a permit to finish a basement?
Most US towns require one, especially for electrical, egress windows and bedrooms.
More project guides
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Build a Fence
Posts, concrete, rails, pickets and hardware for 100 ft of 6 ft privacy fence.
Raised Garden Beds & Landscaping
Soil, mulch, edging and plants for four 4 x 8 ft raised beds and surrounding paths.