Finishing a basement costs $15,000 to $75,000 for most homes, or $30 to $50 per square foot.2 Angi’s average project is $32,000, while basic partial finishes start near $3,500.1 Full remodels of already-finished basements run higher: $27,000 to $81,000 (Fixr).3 Prices below are national averages* for 2026.
*National averages, not local quotes. Your price depends on basement size, room count, bathroom additions, waterproofing needs, and local labor rates.
$32,000
average finish, Angi
$30 – $50
per sq. ft., HomeGuide
$3,500 – $11,500
500 sq. ft., Angi
20 – 40%
labor share, HomeGuide
Quick math: the same 1,000 sq. ft. basement prices at $7,000 to $23,000 (Angi, basic finish), $30,000 to $50,000 (HomeGuide, full finish), and $30,000 to $90,000 (Fixr, full remodel) — a 4x spread, our arithmetic from each source’s per-foot band.123 The difference is scope, not markup: basic finishing is drywall, floor, and paint; a remodel adds rooms, bathrooms, and built-ins. Nail down which scope a quote covers before comparing numbers.
Cost by size
| Basement size | Angi (basic finish, $7–$23/sf) | HomeGuide ($30–$50/sf) | Fixr (remodel, $30–$90/sf) |
|---|---|---|---|
| 500 sq. ft. | $3,500 – $11,500 | $15,000 – $25,000 | $15,000 – $45,000 |
| 1,000 sq. ft. | $7,000 – $23,000 | $30,000 – $50,000 | $30,000 – $90,000 |
| 1,500 sq. ft. | $10,500 – $34,500 | $45,000 – $75,000 | — |
| 2,000 sq. ft. | $14,000 – $46,000 | $60,000 – $100,000 | — |
Each table matches its own per-foot band exactly — 1,000 sq. ft. × $7 to $23 = $7,000 to $23,000 (Angi), our arithmetic.1 Open floor plans cost less than subdivided layouts (HomeGuide).2
Cost by scope
| Scope | Cost | Source |
|---|---|---|
| Partial finish | $2,500 – $20,000 | HomeGuide |
| Basic finish (whole basement) | $7 – $23 per sq. ft. | Angi |
| Full finish (rooms, bath rough-in) | $30 – $50 per sq. ft. | HomeGuide |
| Partial remodel (already finished) | $10,000 – $30,000 | Fixr |
| Full remodel (already finished) | $27,000 – $81,000 | Fixr |
| Bathroom addition | $10,000 – $25,000 | HomeGuide |
| Bedroom addition | $3,000 – $12,000 | HomeGuide |
| Kitchenette | $5,000 – $20,000 | HomeGuide |
Fixr’s $50,000 national average describes a complete remodel of a previously finished 900 sq. ft. basement — a different project from Angi’s $32,000 average finish of an unfinished one.13 Fixr separates the two: finishing (first time) runs $15,000 to $30,000, remodeling $27,000 to $81,000.3
Line items and add-ons
| Item | Cost | Source |
|---|---|---|
| Waterproofing | $4,400 average ($5 – $10/sf); HG $1,900 – $6,300 | Angi, HomeGuide |
| Framing | $7 – $16 per sq. ft.; HG $1,100 – $4,500 total | Angi, HomeGuide |
| Drywall | $1.50 – $3 per sq. ft. | Angi |
| Ceiling | $9 – $13 per sq. ft. | Angi |
| Insulation | $0.30 – $6.75 per sq. ft. | Angi |
| Flooring | $1,500 – $4,500 | Angi |
| Egress window | $200 – $950 (Angi); $2,000 – $5,000 (HG) | Angi, HomeGuide |
| Electrical | $2,000 – $13,500 | HomeGuide |
| HVAC | $2,000 – $3,000 (Angi); $5,000 – $11,000 (HG) | Angi, HomeGuide |
| Sump pump | ~$575 installed | Angi |
Egress windows show a real disagreement: Angi prices the window and installation at $200 to $950, while HomeGuide’s $2,000 to $5,000 includes excavation and permits — again, scope.12 Labor runs 20% (Angi) to 20–40% (HomeGuide) of the total; materials account for the rest.12
Worked examples
Example 1 — 1,000 sq. ft., basic finish. Angi’s band: $7,000 to $23,000 = 1,000 × $7 to $23, our arithmetic.1 That covers framing, drywall, ceiling, insulation, and basic flooring — no bathroom, no extra rooms.
Example 2 — same 1,000 sq. ft., full finish with a bathroom. HomeGuide: $30,000 to $50,000 for the finish2 + $10,000 to $25,000 for the bathroom addition2 = $40,000 to $75,000 total, our arithmetic. The bathroom alone doubles the budget.
Example 3 — labor share on the average job. On Angi’s $32,000 average, labor at 20 to 40% is $6,400 to $12,800, our arithmetic.12 Angi notes contractors fold labor into the quote rather than billing hourly, so the split is worth asking for when comparing bids.1
FAQ
Why do per-foot prices differ 4x between sources? Scope. Angi’s $7 to $23 is basic finishing; HomeGuide’s $30 to $50 is a full finish; Fixr’s $30 to $90 is remodeling an already-finished space.123
Should I waterproof first? Yes — waterproofing costs $4,400 on average (Angi) and protects everything after it. Finishing over a moisture problem ruins the new materials.12
Do bedrooms need an egress window? Yes, code requires one in any basement bedroom. Budget $200 to $950 for the window itself, or $2,000 to $5,000 with excavation and permits.12
What adds the most value? Open living space and a bathroom. A bathroom addition runs $10,000 to $25,000 (HomeGuide) but transforms how the space is used.2
How long does it take? A basic finish is typically a few weeks; full remodels with bathrooms and rooms run one to three months, our estimate — permits and inspections drive the schedule more than the work itself.
DIY shopping: a basement dehumidifier keeps new drywall and flooring dry year-round (plain link, no affiliate relationship).
Sources
- Angi, How Much Does It Cost to Finish a Basement? (2026 data).
- HomeGuide, How Much Does It Cost to Finish a Basement? (2026).
- Fixr, How Much Does It Cost to Remodel a Basement? (2026 data).
Related guides
Basement Waterproofing Cost
Sump Pump Installation Cost
Crawl Space Encapsulation Cost
Bathroom Remodel Cost
All cost guides
Home Addition Cost Guide