Everything You Need to Know About Condo Conversion in San Francisco
San Francisco has some of the most complex condo conversion rules in the country. If you own a multi-unit building — or are thinking about buying one — understanding how this works could mean the difference between a significant equity event and years of waiting. Here's the full picture.
Why Condo Conversion Is So Restricted
The restrictions go back to 80’s and they exist for a reason. A wave of large building conversions displaced a significant number of long-term tenants. The city's response was to create one of the tightest conversion frameworks in the country.
Today, the rules are simple on the surface: buildings with more than 6 residential units cannot convert. Commercial and industrial properties are exempt, and newly constructed buildings or units don't fall under these rules. But for existing apartment buildings, there are really only two paths forward.
The Two Paths to Conversion
Path 1: The Duplex Bypass (Automatic Qualification)
This is the faster, cleaner route — and it applies exclusively to two-unit buildings.
To qualify automatically, both units must be owner-occupied by separate owners. Each owner needs to hold at least 25% of the building and use their unit as their primary residence for at least one year. Vacant units don't count. Mixed-use buildings also qualify for automatic conversion if they have no more than two residential units, even if the total number of resulting condominiums exceeds two.
One important catch: if there's any evidence of an illegal in-law or third unit in city records, conversion under the two-unit bypass can become extremely complicated — or impossible. The city creates a catch-22 situation where legalizing the third unit disqualifies you from the two-unit rules, but removing it requires permits that are often impossible to obtain under housing preservation policies. An ADU may offer a workaround, but city policy on this remains inconsistent.
Path 2: The Conversion Lottery
Buildings that don't qualify for the bypass have to wait for the annual conversion lottery — which has been suspended and is expected to return in the near future (2026-2027). Only 2–4 unit buildings may enter. Buildings with five or more residential units are not eligible.
To enter the lottery in a given year, all but one of the units must have been owner-occupied for the three years immediately preceding the entry deadline (typically mid-January). Each qualifying owner must hold at least 10% of the building.
The lottery converts up to 200 units per year — roughly 55–70 buildings depending on unit count. It's divided into two pools: Pool A for buildings that have lost at least three times (designed to guarantee an eventual win for persistent applicants), and Pool B, open to all, selected randomly.
How Evictions and Buyouts Affect Eligibility
This is where things get complicated — and where a lot of owners get caught off guard.
No-fault evictions (meaning the tenant didn't do anything wrong — the owner wants to occupy, renovate, or withdraw the unit from rental use) can seriously damage your eligibility:
Evicting an elderly tenant (60+, residing in the building for 10+ years) or a disabled or ill person generally disqualifies the building entirely.
Two or more no-fault evictions of any tenants extends all owner-occupancy requirements to 10 years.
A building generally cannot enter the lottery until eight years after its most recent no-fault eviction.
Tenant buyouts — where a tenant agrees to leave voluntarily in exchange for money — are treated similarly. Since March 2015, all buyouts must be reported to the SF Rent Board. Buyouts involving protected tenants (elderly, disabled, catastrophically ill) can permanently disqualify a building from the lottery. Two or more buyouts of non-protected tenants extends the owner-occupancy requirement to 10 years.
The Inspection Process
Once a building qualifies, it goes through a physical inspection and application process. The timeline varies but has historically averaged 6–12 months.
Inspectors look at three main categories:
Unpermitted work — renovations, decks, in-law units completed without permits
Safety hazards — fire egress, electrical issues
Energy and water conservation — any code violations in that category
Buildings do not need to meet current building codes, be seismically upgraded, or have parking to convert.
Tenant Rights After Conversion
Tenants don't lose their footing when a building converts. All renters get the right to purchase their unit after conversion — even if the owner has no intention of selling. (The owner can set the price wherever they want, which effectively discourages purchase in practice.)
Disabled and senior tenants (over 62) receive lifetime rent-controlled leases. Other tenants receive one-year rent-controlled leases. And here's something most people don't realize: converted units are not exempt from most rent control restrictions until they've been sold following conversion.
What Does It Actually Cost?
Conversion costs — application fees, attorney fees, surveying — typically run $20,000–$25,000 depending on building size. That excludes the cost of any required building repairs uncovered during inspection, which can vary widely.
For most owners, this is a modest number relative to the equity upside of selling individual units at retail condo prices rather than as a single investor building.
The Bottom Line
Condo conversion in SF is a long game. The rules are strict, the timelines are real, and the tenant protections are significant. But for the right building — particularly a two-unit owner-occupied duplex — it can be a meaningful wealth event.
If you're a multi-unit owner in San Francisco and wondering whether your building qualifies, or what the path looks like, I'm happy to talk through it.
Sources: SF Planning Department, Andy Sirkin's "Summary of San Francisco Condominium Conversion Rules" (5/31/22). This post is for informational purposes only and does not constitute legal advice. Always consult a qualified real estate attorney for guidance specific to your building and situation.
