Why SB-9 Projects Fail After Approval in Santa Clara County

Most owners think the hard part of an SB-9 project is getting the city to say yes. Getting approved is the part that makes people feel safe. It is also where a surprising number of Santa Clara County projects quietly lose money, because the approval only confirms what you are allowed to build. It says nothing about what it will cost in time, utilities, and financing to actually finish and sell or rent the units.

Here are six ways approved SB-9 projects fail after the permit is in hand. Every one is a pattern we have watched play out on real South Bay parcels.

1. PG&E sets the meter on its own clock, not yours

A finished rear unit can wait month after month for PG&E to energize it when the neighborhood transformer is at capacity and a new one has to be planned and installed. PG&E's own target is about 6 months, its maximum window is 12 months, and it has been missing that target close to half the time. A unit that cannot get a meter cannot be rented or sold while the construction loan keeps accruing. A year of carry on a 400,000 dollar loan at 10 percent is roughly 40,000 dollars, spent waiting on a utility.

2. An easement runs straight through the new lot

After the lot split is recorded, an owner can learn that a PG&E or sanitary easement crosses the buildable area of the new parcel, or that shared-driveway access was never properly granted, which can leave the rear lot with no legal access. Fixing title and easement problems after recordation commonly adds 2 to 5 months plus survey and legal cost.

3. The condo map turns into its own project

An owner who wants to sell units separately can underestimate the HOA formation, the CC&Rs, and the Final Map process. The build finishes and the sale stalls because the map is not recorded. A condo map can add 4 to 9 months over a simple lot split.

4. Splitting the utilities costs more than planned

A sellable second unit on a separate SB-9 lot usually needs its own water, sewer, and electric, and the fee exemptions that protect small ADUs do not apply to a new fee-simple parcel. A separate electric service runs 2,000 to 5,000 dollars or more, a separate sewer lateral 5,000 to 25,000 dollars, plus water and trenching, so the total commonly lands at 25,000 to 60,000 dollars that never appeared in the first budget.

5. The lender walks after the split

Financing lined up against the original single parcel can fall apart once the split changes the collateral. Two smaller lots sometimes appraise lower combined than the one larger lot did, and the owner-occupancy affidavit can conflict with the loan terms. The owner ends up approved to build and unable to fund it.

6. The upside was modeled, the carry was not

The most common failure is the quietest one. An owner models four units of upside and never models the 18 to 30 months of carry, the property tax reassessment on the new construction, the builder's risk insurance, and the gap between finishing and the first rent check. Carry can consume 10 to 20 percent of total project cost.

What these six have in common

None of them show up in a zoning lookup, and none are visible at approval. They live in the sequence after the city says yes, which is the part most owners have never done before and most feasibility tools skip. The unit count tells you the ceiling. These six tell you whether you ever reach it.