Stairway Replacement Cost Calculator

Stair replacement is moderate-cost project but high-impact for safety and aesthetics.

Step count

Per step cost

Railing linear ft

Per railing LF

Permit fee

Total cost

$7,850

Steps cost

$4,500

Railing cost

$3,000

How the math works

Total = (steps × $/step) + (railing × $/LF) + permit.

15 × $300 + 20 × $150 + $350 = $4,500 + $3,000 + $350 = $7,850 stairway replacement.

How to Use

Enter step count.
Enter per step cost.
Enter railing linear ft.
Enter per railing lf.
Enter permit fee.
Read total cost.

Frequently Asked Questions

Stairway cost benchmarks?

Carpet on existing stair: $300–1,500. Hardwood treads on existing: $1,000–4,500. Full replacement (15-step interior): $2,500–8,000 basic, $8,000–25,000+ premium with custom rail. Spiral or floating stairs: $5,000–25,000+. Exterior wood: $2,000–8,000 for 12 steps. Concrete or stone: $3,000–15,000. Code: 7.75" max riser, 10" min tread, 36" rail height. Permit: $150–800. Engineer: $500–2,500 for non-stock design. Spiral stairs: 5" radius minimum, code-restricted.

How accurate is this estimate?

Material and labor estimates are accurate to ±15% with reasonable inputs but local market conditions vary. Major markets cost 30–60% more than rural. Labor rates regional (union vs non-union, prevailing wage). Material prices fluctuate with commodity cycles. Get 3 contractor bids for any work over $5k. This calculator is a sanity check, not a substitute for actual quotes.

DIY vs contractor?

DIY savings: 40–70% of contractor cost on labor. Realistic skill threshold: painting, basic plumbing, simple electrical, drywall, flooring. Pro required: structural, gas, complex electrical, HVAC, roofing (warranty + insurance), permits. Permitted work without license risks insurance and resale. Time: hobby DIYers 3–5x slower than pro. Tools and learning curve real.

Permit and code compliance?

Permits required for: structural changes, additions, electrical service changes, plumbing rough-in, HVAC replacement, roof replacement (varies), fence (varies). Cost: $50–2,000+ depending on scope. Skipping permit risks: stop work order, fines, forced removal, insurance denial, resale title issues. Always pull permit; cost is small relative to compliance friction.