If we’re not mistaken [which we were, see UPDATE], 124 Lily is a Topetcher Architecture design built on a lot split from 229 Oak behind. Single-family new construction in Hayes Valley with four bedrooms, three and one-half baths, and two car parking (albeit tandem).
Asking $1,895,000 for its 2,650 square feet ($715 per new construction square foot).
UPDATE: Some tandem parking color from a plugged-in reader:
The tandem parking is kind of neat, actually. It is side by side, but because the garage door is big enough for only one car, they have a platform onto which you drive a car. There is a control panel on the wall which slides the platform over (via belts in tracks, I believe) so that another car can be parked in that place.
UPDATE (1/9): Well, we were mistaken. While Kennerly Architecture & Planning was retained during construction to refine details and materials, Mark Topetcher of Topetcher Architecture is the architect of record. Our appologies for the confusion.