Support Beam Replacement Cost Calculator
Estimate the cost to replace a structural support beam or header based on span, material, and your location.
A support beam / header replacement costs $1,500 to $15,000, with a national average of $6,500. Use the calculator below to estimate your cost by size, quality tier, and location.
Last updated: March 25, 2026
Support Beam Replacement Cost Calculator
Estimate the cost to replace a structural support beam or header based on span, material, and your location.
Estimated Total
$6,500
Itemized Breakdown
This calculator provides estimates based on national averages adjusted for your region. Actual costs may vary significantly based on specific project conditions, contractor availability, material prices, and local market factors. Always get at least 3 quotes from licensed, insured contractors before starting your project.
Want the full picture?
Read our complete Support Beam / Header Replacement cost guide with material comparisons, contractor tips, savings strategies, and regional pricing data.
Quick Cost Reference
Cost by Tier
Single door or window header replacement, 4-6 feet, wood LVL beam, temporary shoring only for the span above.
Main carrying beam replacement in basement or crawl space, 12-16 feet, steel or LVL beam, engineer plan, temporary jacking and shoring.
Multiple beams or long-span ridge beam/header, steel I-beam installation, full structural engineering, crane rental, complete restoration of finished surfaces.
How This Calculator Works
This support beam replacement cost calculator estimates your total project cost from four inputs: project size, quality tier, the options you select, and your location. It combines material and labor rates for your chosen tier, adds typical permit costs, then applies a regional cost multiplier so the estimate reflects pricing in your state.
Estimates use 2026 cost data cross-referenced from multiple industry sources. Treat the result as a planning range, not a quote. Your final price depends on your specific scope, material choices, and local contractor availability, so collect at least three itemized bids before you set a budget.
What Affects Your Support Beam / Header Replacement Cost
Beam Size and Span
$500 - $15,000A standard door header spanning 4-6 feet costs $800-$2,500 to replace. A basement carrying beam spanning 12-16 feet runs $4,000-$10,000. A long-span ridge beam or open-concept header spanning 20-30 feet can cost $8,000-$20,000. Longer spans require deeper, heavier beams that cost more in material and are harder to handle, often requiring special equipment.
Beam Material
$200 - $8,000 differenceDimensional lumber headers cost $10-$20 per linear foot for materials. LVL (Laminated Veneer Lumber) costs $25-$50 per linear foot and is the standard for most replacements. Glulam beams cost $30-$60 per linear foot and are used for long spans and exposed applications. Steel I-beams cost $50-$150 per linear foot for the beam alone, plus significantly higher labor for placement.
Temporary Shoring Requirements
$500 - $5,000Before any load-bearing beam can be removed, the loads it carries must be transferred to temporary posts and beams. Simple shoring for a short header might cost $300-$700 in labor. Shoring a full-length basement beam supporting multiple floors with a full load runs $1,500-$4,000. The complexity of the shoring plan is often what separates a straightforward job from a complicated one.
Access and Finished Surface Restoration
$500 - $10,000A basement beam with open joists above and concrete below is the easiest access scenario. Beams concealed in finished walls or ceilings require drywall removal, patching, and repainting on both sides - adding $1,500-$5,000. Beams above finished floors may require temporary protection or partial floor removal. Exterior headers behind brick veneer add $2,000-$5,000 for masonry work.
Engineering and Permitting
$500 - $4,000Many jurisdictions require a building permit for structural beam replacement. Simple header replacements may not require engineered drawings, but any beam change that alters the load path requires stamped engineer drawings at $500-$1,500. Permits add $300-$800 in fees. Skip this step and you face disclosure problems at resale, insurance issues, and potential safety risks.
Frequently Asked Questions
How much does a support beam / header replacement cost?
A support beam / header replacement costs $1,500 to $15,000 for a typical project, with a national average of $6,500. Budget projects start around $800, and premium work can reach $30,000. Use the calculator above for an estimate matched to your size, quality tier, and state.
How does this support beam / header replacement cost calculator work?
It combines 2026 material and labor rates for your selected quality tier, adds typical permit costs and any options you choose, then applies a cost multiplier for your state. Adjust the inputs to see your estimate update instantly.
Is this calculator free to use?
Yes. This support beam / header replacement cost calculator is free, requires no signup, and returns instant estimates.
Does the estimate include labor and permits?
Yes. Each estimate combines material and labor costs for your chosen quality tier plus typical permit fees. Your final price still depends on your specific scope and local contractor rates, so collect itemized quotes before budgeting.
How can I lower my support beam / header replacement cost?
Use LVL instead of steel whenever span and load requirements allow - LVL is substantially cheaper to purchase and install than steel beams. Combine beam replacement with related open-concept work (wall removal, post installation) to share mobilization and permit costs.
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