How much does crawl space beam repair cost?

Beam repair in a crawl space can range from localized reinforcement to full replacement of a major load-bearing member. Angi's 2026 crawl-space repair guide lists beam replacement around $1,500 to $5,000 as a typical planning range, but difficult access, large beams, temporary shoring and related moisture damage can push the project higher.

What can make the price rise

• Beam size and length: larger structural members require more material and handling.
• Temporary shoring: the structure may need support while damaged material is removed.
• Access: low clearance, plumbing, ductwork or tight entry can increase labor.
• Moisture or rot: the repair may expand if nearby joists, sill plates or posts are also damaged.
• Support changes: additional posts, footings or piers may be needed if inadequate support caused the failure.

Repair versus replacement

Not every damaged beam requires complete replacement. Depending on the material, damage and engineering requirements, a professional may discuss reinforcement, sistering, partial replacement or a new beam. The right method depends on the load, condition and cause of damage.

Moisture must be part of the conversation

If rot or mold developed because the crawl space stays damp, replacing the beam without correcting the moisture source can leave the new material exposed to the same conditions. Ask whether drainage, vapor control, encapsulation or dehumidification is part of the scope. Our crawl space moisture repair cost guide separates those costs from the structural work.

How this relates to sagging floors

A damaged beam can allow floors above to dip, bounce or become uneven, but joists, posts and foundation supports can create similar symptoms. See our sagging floor repair cost guide for the broader set of causes.

Questions to ask a contractor

• Is the beam being repaired, reinforced or fully replaced?
• What caused the damage?
• Is temporary shoring included?
• Are posts, footings or joists also part of the repair?
• What moisture correction is needed to protect the new work?
• Are permits or engineering included in the quoted price?

2026 source notes

Angi's current crawl-space cost guide lists beam replacement in the low-thousands and notes that moisture, hidden deterioration and difficult access can significantly increase total project cost.

Angi crawl space repair cost guide · HomeAdvisor crawl space repair cost guide

This article is educational. Structural beam work should be scoped on site by an appropriate qualified professional.