Soft-Story Buildings:
Due Diligence Checklist for Buyers and Sellers in the Bay Area

If you’re buying or selling a wood-frame apartment building in the Bay, “soft-story” is no longer a side note. It affects safety, financing, insurance, and resale. This checklist walks you through the work you should do before you sign.

1. Confirm If It’s a Soft-Story / Subject Building

For typical Bay Area programs, a building is likely soft-story if:

• Wood-frame construction
• Built or permitted before ~1990
• 3+ units, 2+ stories
• Ground story or crawl space with big openings, parking, or tall skinny walls/posts

If you see tuck-under parking with apartments above, assume “soft-story risk” until proven otherwise.

2. Pull the Paper Trail

Whether you’re buyer or seller, start with documents:

• City permits

• Search by address. Look for “soft story,” “seismic retrofit,” “structural upgrade,” or “wood-frame target story.”

• Approved plans

• Get the stamped structural drawings for any seismic work.
• Confirm they match your address, APN, and building layout.

• Final inspections / compliance letters

• Check that soft-story permits were finaled, not just issued.
• In some cities, verify program status in public databases (e.g., SF’s soft-story compliance list).

If there’s no trace of real seismic work, treat it as non-retrofitted in your risk and pricing.

3. Check Reality vs Paper

Next, see if the building matches the drawings:

• Frames & walls

• Plans: locations and sizes of new steel frames or shear walls.
• Field: do those frames/walls actually exist where shown?

• Connections

• Plans: hold-downs, anchors, straps at specific points.
• Field: visible hardware at posts, beams, and wall ends, not just bare old lumber.

• Foundations

• Plans: new or enlarged footings/grade beams under new elements.
• Field: fresh concrete where detailed, not crumbling or missing.

If the plans look robust but the building looks untouched, you’ve got a paper retrofit, not a real one.

4. Evaluate Current Risk & Future Costs

For buyers:

• Assume a non-retrofitted soft-story will require six-figure work for many multifamily buildings.
• Use a range, not a single guess, until a contractor and engineer have walked it.
• Factor in:
  • Permit timelines
  • Tenant disruption
  • Insurance and lender expectations

For sellers:

• If work is not done, expect buyers and lenders to discount for both cost and hassle.
• If work is done, good documentation and photos can support a better price and smoother escrow.

5. Insurance, Lending, and Disclosure

• Insurance

• Some carriers price or restrict coverage for known soft-story risk.
• A documented retrofit can improve insurability and pricing.

• Lenders

• May require proof of compliance with local soft-story ordinances.
• May want a plan and budget for future work if not yet done.

• Disclosures

• Sellers should disclose:

• Known soft-story risk or city notices
• Past seismic work (with permits and plans)
• Any known structural issues or foundation movement

Being upfront builds trust and cuts down on last-minute deal blowups.

6. When to Bring in Pros

You don’t need to become an expert. You need the right people in the right order:

• Seismic-savvy contractor

• Walks the building, documents existing conditions, compares to permits/plans.

• Structural engineer

• Interprets risk level, program compliance, and needed work.

• Real estate / legal

• Structures deal terms to share cost and timing of required retrofits.