What cripple wall means
A cripple wall is a short framed wall between the top of the foundation and the first floor, enclosing a crawl space.
Also called pony wall.
Where it matters on a carpentry job
Unbraced cripple walls are a known weak spot in earthquakes, and bracing them is a common retrofit in seismic areas. Sheathing and anchor bolts are the core of the job.
What the model code says
- The code defines a cripple wall as a framed wall from the top of the foundation to the underside of the first story floor framing. (IRC 2021, Chapter 2)
- Cripple walls taller than 4 feet are framed with studs sized as for an additional story. (IRC 2021, Chapter 6)
Check which code edition your building department enforces for cripple wall before you quote.
What it costs
Koira's earthquake retrofit cost guide puts a typical job at $6,550, with most between $4,250 to $9,350. The guide shows its sources and what moves the price.
Work it out
- Cost guide: Earthquake retrofit cost
- Tools, templates and guides: Free carpentry resources
Sources: 2021 International Residential Code, Chapter 2, Definitions (ICC); 2021 International Residential Code, Chapter 6, Wall Construction (ICC). Checked October 9, 2026.