Structural framing repair cost
Reinforcing notched or damaged floor joists, beams, rafters, subfloor and roof decking.
Most HomeCloud structural framing jobs
$500 to $2,000
Middle job $780. Based on a statistically significant number of HomeCloud jobs, November 2024 to October 2026.
Most HomeCloud structural framing jobs cost $500 to $2,000. Most of this work is adding support, not rebuilding: a carpenter fastens a new board alongside a notched or cracked joist (called sistering), adds a beam or post, or replaces a section of rotted wood.
Framing problems often come with moisture. If water caused the damage, the source has to be fixed too, or the repair won't last. See crawl space moisture.
Completed HomeCloud structural framing jobs
| Work | Most homes | Middle price | Based on |
|---|---|---|---|
| Structural framing and support | $500 to $2,000 | $780 | Statistically significant number of HomeCloud jobs |
What customers paid on completed HomeCloud structural framing and support jobs, November 2024 to October 2026. The range is the middle half of jobs; the middle job is the median.
What our reports priced common repairs at
| Work | Most homes | Middle price | Based on |
|---|---|---|---|
| Add support to floor joists | $250 to $610 | $250 | The 7% of homes where it was priced |
| Reinforce damaged roof decking | $220 to $330 | $320 | Limited number of homes |
| Fix floor framing damage | $480 to $2,040 | $730 | Limited number of homes |
| Re-seat or shim a roof rafter | About $200 | Limited number of homes | |
| Fix rotted floor framing | $800 to $1,520 | $1,200 | Limited number of homes |
| Replace a split roof beam | $200 to $310 | $250 | Limited number of homes |
What HomeCloud reports priced this fix at in homes we evaluated Sep 2025 to Oct 2026. The range is the middle half of homes; the middle price is the median. Your price comes from a written estimate for your home.
What affects the price
- How much framing
- Sistering one joist is a small job. Several joists, a beam or a whole section of floor costs more.
- Access
- Low crawl spaces and tight attics take more time to work in.
- Rot and moisture
- Rotted wood has to come out, and the moisture behind it needs fixing too.
- Engineering
- Bigger repairs may need a structural engineer's design, and some need a permit.
- Hidden damage
- Damage inside walls or under floors may not be visible until the area is opened up, so the final scope can grow.
Common questions
What does "sistering" a joist mean?
A new board is fastened alongside the damaged or notched one, so the two carry the load together. It's a common way to strengthen framing without tearing it out.
The report says supports were added under the floor. Is that a problem?
Not always. Added supports often mean someone fixed a sag or soft spot in the past. Ask the seller what was done and why, and watch for new sagging.
More foundation and structure resources
Other foundation and structure repairs
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