What Does Soft Washing a Golden Hill Craftsman Involve?
Soft washing a Golden Hill Craftsman runs $350 to $600 for a two-story home with original wood trim, using a 100 to 150 PSI wash, a 2 to 3 percent sodium hypochlorite mix, and a 10 to 15 minute dwell before rinsing. Canyon-adjacent lots need extra attention since shaded walls hold algae longer.
Last updated: August 2026
We took a job in June on a 1912 Craftsman two blocks off 25th Street, backing up to the Switzer Canyon slope. The north-facing wall had a green-black streak pattern running down from the eaves that the homeowner assumed was mold. It wasn't. It was gloeocapsa magma, the same algae that streaks roofs, just growing sideways on painted wood siding that never fully dries out in the shade.
Why pressure alone would have failed here
The original wood trim on a house this old is soft in places. A pressure washer at anything over 300 PSI will lift paint off wood that's been through more than a hundred San Diego summers. We dropped to 120 PSI on the trim and let the chemistry do the work instead of the water.
Golden Hill sits in a historic district overlay in parts of the neighborhood, and homeowners here are often careful about anything that could damage original material. Soft washing is the only method we'd use on a house like this one.
How Long Does the Clean Last on a Canyon Lot?
Six to nine months on canyon-adjacent walls, compared to 12 to 18 months on sun-exposed sides of the same house. The marine layer that sits in Switzer Canyon overnight keeps the north wall damp well into the morning most of the year, which is exactly what algae needs to come back faster.
| Wall exposure | Typical regrowth time | Recommended cycle |
|---|---|---|
| Canyon-facing, shaded | 6 to 9 months | Twice a year |
| Street-facing, sun-exposed | 12 to 18 months | Annual |
The job itself took just under three hours. An hour of that was staging, since the house sits on a narrow lot with no truck access past the front curb, so we ran 150 feet of hose down the side yard.
Full details on method and pricing are on our soft washing page, and the Golden Hill pressure washing page covers driveways and hardscape on the same properties.
