Integrity Pro Washers Team
Professional pressure washing and soft washing specialists serving San Diego County.
Last updated: 2026-04-09
Last updated: April 2026
How Much Does It Cost to Soft Wash a House in San Diego?
Soft washing a single-family home in San Diego typically costs $300-$650, depending on square footage, number of stories, and stucco condition. Two-story homes with heavy algae buildup run $500-$800. Most of our residential soft wash jobs in neighborhoods like Hillcrest, North Park, and Mission Hills fall in the $350-$550 range for a standard 1,200-1,800 sq ft home.
We get asked about pricing on almost every call. And the honest answer is that soft washing costs more than a basic pressure wash, but it protects surfaces that high pressure would destroy.
Stucco. Painted wood. Vinyl siding. Tile roofs. These materials cannot handle 3,000 PSI. They need a chemical clean at low pressure -- that is soft washing.
What Drives the Price Up or Down?
Square footage is the starting point. But it is not the whole picture.
A 1,500 sq ft single-story home in Clairemont with light dust takes us about 90 minutes and runs $300-$400. That same square footage in a two-story Hillcrest Victorian with black algae streaks on every north-facing wall takes three hours and costs $500-$650. The difference is access, severity, and chemical volume.
Here is what factors into our quotes:
- Home size: Under 1,500 sq ft ($250-$400), 1,500-2,500 sq ft ($400-$600), over 2,500 sq ft ($550-$800)
- Number of stories: Second-story work adds $100-$200 for ladder and extended reach setup
- Stucco condition: Heavy algae or mildew requires stronger SH concentration and longer dwell time
- Roof inclusion: Adding a roof soft wash typically adds $200-$350 to the total
- Landscaping protection: Homes with dense plantings close to walls need pre-soak and rinse work to protect roots
Soft Washing vs Pressure Washing Cost: What Is the Difference?
| Factor | Soft Washing | Pressure Washing |
|---|---|---|
| Typical cost (1,500 sq ft home) | $350-$550 | $200-$350 |
| PSI used | 100-500 PSI | 2,000-3,500 PSI |
| Best for | Stucco, painted surfaces, roofs, wood | Concrete, brick, stone |
| Chemical cost | Higher (SH blend, surfactant) | Lower or none |
| Time on site | 2-4 hours | 1-3 hours |
| Results last | 12-18 months | 6-12 months |
| Surface damage risk | Very low | Moderate if misapplied |
The soft wash costs more upfront because the chemical blend is the cleaning agent, not water pressure. We mix sodium hypochlorite with a surfactant that lets it cling to vertical surfaces. That surfactant is not cheap. But it kills algae and mildew at the root, which means your walls stay clean longer.
Pressure washing is the right call for driveways, sidewalks, and bare concrete. We use both methods on most full-house jobs -- soft wash the walls and roof, pressure wash the hardscape.
Why Do San Diego Homes Need Soft Washing?
San Diego's coastal moisture creates a perfect environment for algae. Even in neighborhoods 10 miles from the beach, morning fog deposits enough moisture to feed growth on shaded walls.
We see the worst buildup on north-facing stucco in neighborhoods with mature trees. North Park, South Park, and Normal Heights homes are repeat customers because the tree canopy keeps those walls damp well into the afternoon.
Most San Diego homes are stucco over wood frame. Stucco is porous. Pressure washing it at high PSI drives water behind the surface and can crack the finish coat. We stopped pressure washing stucco three years ago after seeing too many hairline cracks develop weeks after cleaning. Soft washing is the only method we use on stucco now.
What Does the Average Soft Wash Job Look Like?
A typical residential soft wash for us starts with a full walkthrough. We check for cracked stucco, exposed wood, damaged window seals, and landscaping proximity. Then we pre-soak all plants and grass within six feet of the house.
We apply our SH blend with a 12V pump system at about 60-80 PSI. The solution sits on the surface for 10-15 minutes. You can watch the algae die in real time -- the black streaks turn white, then rinse off clean.
After the dwell time, we rinse everything with fresh water at low pressure. The whole process takes 2-3 hours for a single-story home. Two stories, add another hour.
One job last month in Mission Hills stands out. A 2,200 sq ft two-story with dark green algae covering the entire west wall. The homeowner thought the stucco was permanently stained. Three hours later, it looked like the day it was painted. Cost was $575.
Should You DIY Soft Washing?
You can buy sodium hypochlorite at a pool supply store. Some homeowners do. But the concentration matters -- too strong and you bleach paint, kill plants, and damage seals around windows. Too weak and the algae comes back in weeks.
We mix at specific ratios depending on the surface material and severity. A light dust coat on smooth stucco gets a different mix than heavy algae on textured Spanish stucco. Getting this wrong is expensive to fix.
And two-story work without proper equipment is genuinely dangerous. Ladders on uneven ground, chemical spray drifting back toward your face. We wear respirators and eye protection on every soft wash job. That should tell you something about the chemicals involved.
For a single-story home with light buildup, a careful DIY attempt is reasonable. Anything beyond that, call a professional. The cost difference between a $400 soft wash and repainting damaged stucco at $3,000-$5,000 is not worth the gamble.
If your San Diego home has algae, mildew, or black streaks on the walls, reach out for a free quote. We will tell you whether it needs soft washing or if a standard pressure wash will do the job. No upsell, just an honest answer.
