How much does a support beam / header replacement cost in San Francisco?

A support beam / header replacement in San Francisco typically costs $1,983-$19,828, 32% above the $6,500 national average.

What is the cost per linear ft for a support beam / header replacement in San Francisco?

Support Beam / Header Replacement in San Francisco typically costs $397-$1586 per linear ft.

How long does a support beam / header replacement take?

A support beam / header replacement typically takes 2-5 days. The minimum timeline is 1 day, and complex projects can run 3-4 weeks.

Can I DIY a support beam / header replacement?

DIY feasibility for a support beam / header replacement is rated Very Low - Structural beam replacement requires licensed contractors in virtually every jurisdiction. Improper shoring or beam sizing can lead to partial structural collapse..

Cost to Support Beam / Header Replacement in San Francisco, CA (2026)

If you’re budgeting a support beam / header replacement in San Francisco, most projects run $1,983-$19,828, 32% above the $6,500 national average. What moves that number most is usually one thing: Beam Size and Span. On its own it can swing the cost by $500 - $15,000, so that’s the decision to slow down on before you sweat the smaller stuff.

Easiest place to save: Use LVL instead of steel whenever span and load requirements allow - LVL is substantially cheaper to purchase and install than steel beams.

$1,983-$19,828 in San Francisco

32% above the national average · 1.32x cost multiplier

Expect to pay $1,983-$19,828 for a support beam / header replacement in San Francisco, about 32% above the national benchmark. The West Coast region's contractor market and material costs account for most of this difference. The detailed breakdown below shows how budget, mid-range, and premium projects compare at San Francisco prices.

Cost Breakdown in San Francisco

Line Item	Low	Mid	High
Cost per linear ft	$397	$925	$1586
Materials	$765	$3,188	$7,650
Labor	$1,912	$6,146	$13,658
Permits	$383	$1,020	$1,912
Total	$3,060+33% vs. national avg	$11,246+32% vs. national avg	$26,408+32% vs. national avg

Budget

Single door or window header replacement, 4-6 feet, wood LVL beam, temporary shoring only for the span above.

Mid-Range

Main carrying beam replacement in basement or crawl space, 12-16 feet, steel or LVL beam, engineer plan, temporary jacking and shoring.

Premium

Multiple beams or long-span ridge beam/header, steel I-beam installation, full structural engineering, crane rental, complete restoration of finished surfaces.

Material Options

Material prices below are national averages; availability in San Francisco may shift costs slightly.

Material	Cost/Unit	Pros	Cons	Best For
Dimensional Lumber (2x or 3-ply)	$10-$20 per linear ft materials only	Lowest cost, widely available, easy to work with, no special equipment needed	Limited span capability, susceptible to moisture and decay, not appropriate for long spans	Short window and door headers under 6 feet in non-critical applicationsLowest cost, widely available, easy to work with, no special equipment needed
LVL (Laminated Veneer Lumber)	$25-$50 per linear ft materials only	Stronger than dimensional lumber, stable and consistent, handles longer spans, available in standard sizes	More expensive than dimensional lumber, must stay dry, not attractive for exposed applications	Standard window and door headers, floor beams, and most residential beam replacementsStronger than dimensional lumber, stable and consistent, handles longer spans, available in standard sizes
Glulam (Glued Laminated Timber)	$30-$60 per linear ft materials only	Excellent strength-to-weight ratio, attractive natural wood appearance, available in very long spans	Requires protective finish if exposed, longer lead times for custom sizes, higher cost than LVL	Exposed beams in living spaces, long spans in open-concept designs, architectural applicationsExcellent strength-to-weight ratio, attractive natural wood appearance, available in very long spans
Steel I-Beam (W-Shape or Wide Flange)	$50-$150 per linear ft materials only	Maximum strength for span, does not rot or warp, slim profile for long spans, permanent solution	Requires skilled welders or bolted connections, heavy equipment often needed for placement, more expensive	Long basement spans, load-bearing wall removal projects, or where headroom is very limitedMaximum strength for span, does not rot or warp, slim profile for long spans, permanent solution
Parallel Strand Lumber (PSL)	$35-$65 per linear ft materials only	Very high density and strength, handles heavy point loads, consistent performance	More expensive than LVL, less common and fewer contractor familiarity	Column and post replacements, heavy point-load applicationsVery high density and strength, handles heavy point loads, consistent performance

Other Projects in San Francisco

Full Kitchen Remodel

Full Bathroom Remodel

Hardwood Floor Installation

Back to national average for Support Beam / Header Replacement

San Francisco Estimate

Typical Range

$1,983-$19,828

vs. National Average

32% above national

Cost Multiplier

1.32x

Cost Per linear ft

$397-$1586

This 1.32x estimate prices San Francisco labor from BLS Occupational Employment and Wage Statistics (May 2025) and applies a lighter regional adjustment to materials and permits, which vary less by metro than labor does. Actual bids vary by contractor, project scope, and timing.

See national average costs →