The Fire Is When the City Finds Out
Unpermitted units exist across San Francisco and they are concentrated here. Converted garages, divided ground floors, rear structures brought into residential use, most created long ago and many providing genuinely needed housing.
A serious fire brings inspectors into the building, and what was informal becomes documented. Section 37.9(a)(11) governs a temporary eviction for capital improvement work, and where that work will exceed 3 months a Petition for Extension of Time must be filed with the Rent Board before the notice is served. That is not automatically a disaster, and handled properly it need not become one. Handled badly, it becomes the most expensive thing on the file. The rules layer is on our page covering units, tenants and demolition control.
What Actually Happens When an Unpermitted Unit Is Discovered After a Fire?
Disclose It, Every Time
Bayview housing spans the 1900s through the 1960s with later infill. Planning Code Section 317 treats unauthorised units alongside legal ones for the purposes of removal, and Building Code Section 103A.3 imposes a 5 year restriction on construction permits following an unlawful residential demolition. A covered tenant must be offered their unit back within 30 days of repairs completing.
This is the strongest advice on this page and it is worth stating without qualification.
An unpermitted unit is a valuation issue. A concealed one, on an application carrying a sworn declaration, is a different order of problem entirely. Tell us, tell any buyer, and tell whoever prepares any application. Buyers in this market expect unauthorised units in Bayview and they price them. What they cannot price is one they were not told about.
Will Disclosing It Kill the Sale?
We publish no guidance on whether a particular space can be legalised. That depends on the building, on the code requirements the space can or cannot be brought to, and on the Planning Department's view. It is a question with a real answer and it materially changes what the property is worth.
The Occupant's Position Is Separate
The second thing owners conflate. Whether a unit was permitted and whether the person living in it held a tenancy are different questions with different answers.
Where the Rent Ordinance covered the tenancy, a displaced occupant may have a right to return once repairs are complete, regardless of the unit's permit status. That is a lawyer's question and it is worth asking before soliciting offers, because it changes what a buyer is acquiring.
What Is My Burned Bayview Building Actually Worth?
What the Rest of the File Looks Like
Beyond the unit question, Bayview stock is mixed: single-family houses, small multi-unit buildings, and a range of construction ages and types. Lots are generally more generous than the dense northern neighbourhoods, which makes access and clearance more practical where that route is available and lawful.
That last qualifier matters. Practical and permitted are different things here, and section 317 governs the second.
Bayview in Context
The other area where in-law units are common, though generally in a more formalised state, is covered on our page about a district of two and three unit flats. Where tenancy length rather than permit status dominates the file, see our page for a neighbourhood of older flats.
Bayview Questions
Should I Mention the Converted Garage?
Yes, to everyone. Buyers here expect it and price it. Concealment on an application carrying a sworn declaration is a materially worse problem than the unit itself.
Can the Unit Be Legalised?
Sometimes, depending on the space and what code requirements it can be brought to. It is a Planning Department question with a real answer, and the answer changes the property's value.
Will You Buy a Building With Unpermitted Space?
Yes, and we would rather hear about it in the first conversation than the third. It affects the figure honestly rather than fatally.