Bay Area Home Purchase Due Diligence Checklist
A guide to identifying red flags and conducting thorough due diligence when purchasing a home in San Francisco, Berkeley, or Oakland.
Buying a home is one of the largest decisions you'll make, and the disclosures, permits, and reports involved can be dense. This checklist is meant to make that process concrete: what to look for, what's specific to your city, and when to bring in a specialist.
Universal Red Flags (All Bay Area Cities)
These warning signs apply across San Francisco, Berkeley, and Oakland, and should be investigated carefully before closing on any property.
Disclosure issues: Inconsistent disclosures (SPQ, TDS, inspection reports) or blank/"unknown" answers on seller documents.
Structural damage: Past or present water damage, mold, or foundation cracks.
Pest problems: Termite, rodent, or pest infestations, including incomplete remediation from a prior treatment.
Permit violations: Unpermitted additions or remodels; always verify permit history against city records rather than taking a listing description at face value.
Legal and Financial Red Flags
Legal issues: Outstanding liens, HOA litigation, or legal disputes tied to the property.
Neighbor disputes: Property line disagreements, noise complaints, parking conflicts, or easement issues.
Use restrictions: Limits on ADUs, short-term rentals, pets, or operating a home business, depending on zoning and HOA rules.
Safety and mechanical systems : Major issues with the roof, electrical, plumbing, or seismic retrofitting.
Natural hazard zones: Flood, wildfire, or earthquake risk, and what that means for your insurance options and premiums.
Tenant-Occupied and Environmental Considerations
Tenant-occupied property: If the home has existing tenants, review the lease terms, tenant rights, and any applicable rent control rules before you assume you can move in on your timeline.
Environmental hazards: Lead paint and asbestos are common concerns in homes built before 1978; underground storage tanks are another item worth confirming, especially in older neighborhoods.
These factors can directly affect your ability to occupy the property on the timeline you expect, and may require specialized inspections or remediation.
San Francisco-Specific Due Diligence
San Francisco has its own set of regulatory requirements and disclosure obligations worth reviewing closely:
Review the 3R Report for permit history, including any expired or unfinalized permits through the Department of Building Inspection (DBI)
Confirm compliance with the city's water and energy conservation ordinances
Check for Underground Storage Tank (UST) inspections and any history of contamination
Verify historic status and zoning restrictions that could limit remodeling or usage
Check the status of soft-story seismic retrofits, including any outstanding compliance orders
Berkeley-Specific Due Diligence
Berkeley's tenant protections, seismic requirements, and evolving zoning create their own due diligence checklist:
Verify seismic retrofit status, including foundation bolting and cripple wall reinforcement
Review rent control status and tenant rights through the Berkeley Rent Board
Assess how the city's newer middle-housing zoning affects lot splits and ADU potential for the property
Confirm energy and water efficiency compliance required at resale
Check permit records for all repairs or additions through the Berkeley Permit Center
Oakland-Specific Due Diligence
Oakland due diligence includes some infrastructure requirements that are easy to overlook:
Confirm a valid sewer lateral compliance certificate, including its expiration date and any recent repair history
Confirm a sidewalk compliance certificate and recent repair history
Verify permitted work, zoning compliance, and check for any outstanding city violations
Review rent control status, tenant protections, and existing lease documents if applicable
Review natural hazard disclosures for flood, fire, and earthquake zones
Check for any fair housing or accessibility-related issues tied to the property
How to Review Disclosures Effectively
Thorough disclosure review is your first line of defense against costly surprises after closing.
Cross-check documents. Compare all seller-provided disclosures against each other for consistency, and note any omissions.
Follow up on every flag. Any item marked "unknown" or flagged in a disclosure deserves a follow-up request for documentation or a dedicated inspection don't let a vague answer stand in for a real one.
Verify with the city directly. Use official city portals to confirm permits, zoning designations, and compliance records rather than relying solely on what's disclosed.
When to Bring in Specialists
Some findings are worth a professional opinion beyond a standard home inspection, structural engineers, real estate attorneys, or environmental consultants, depending on what turns up. It's also worth researching neighborhood-level conditions that could affect long-term value or habitability, not just what's happening inside the four walls of the home.
The cost of bringing in a specialist is almost always small compared to the risk of buying a property with a hidden structural, legal, or environmental problem.
Your Due Diligence Action Plan
Review all disclosures: especially the SPQ, TDS, inspection report, and any other seller-provided documents, watching for red flags or inconsistencies.
Verify city records: confirm permits, zoning, and compliance history through official city portals rather than assuming the listing is complete.
Conduct inspections: bring in qualified professionals for structural, pest, and environmental assessments before your contingency period closes.
Address red flags directly: negotiate repairs or credits, or be willing to walk away if what you find is more than you're comfortable taking on.
Thorough due diligence protects your investment and helps you make an informed decision about one of the largest purchases of your life.
Have a specific property or situation you're trying to evaluate? Let's talk it through.
Fontaine Schaber, REALTOR® DRE 02198398 The Fitzpatrick Team | Compass 510.479.4061 | fontaine.schaber@compass.com