Soft washing costs in Ontario typically range from $300–$800 for a standard house washing, $400–$900 for roof cleaning, and $200–$500 for targeted siding or fence treatment. Exact pricing depends on the home's size, degree of biological growth, number of storeys, and the surfaces being treated. This guide walks through typical pricing in the Kitchener-Waterloo and Cambridge area so you know what a fair quote looks like.
Typical Soft Washing Prices in Ontario (2026)
| Service | Typical Range | Notes |
|---|---|---|
| Full house exterior soft wash | $350–$750 | All siding surfaces, one-storey bungalow to two-storey |
| Roof soft washing | $400–$900 | Asphalt shingles; price varies by roof area and pitch |
| Siding only (one side) | $150–$300 | For spot treatment of heavily affected walls |
| Fence soft washing | $150–$350 | Depends on linear footage and material |
| Deck soft washing | $200–$450 | Wood or composite; combined with brightener treatment if wood |
| Commercial building exterior | $600–$2,500+ | Based on square footage and access requirements |
What Affects Soft Washing Cost
Home size and storey count: A 1,500 sq ft bungalow costs significantly less to soft wash than a 3,000 sq ft two-storey home. More surface area means more solution, more time, and more equipment reach required. Two-storey homes often require extension equipment or boom sprayers, which adds to labour cost.
Degree of growth and staining: A home with light green algae discolouration is faster to treat than one covered in heavy black streaks, thick lichen colonies, or multi-year moss buildup. Heavier growth requires higher-concentration solutions, longer dwell times, and sometimes multiple passes — all of which add to cost.
Surface type: Standard vinyl siding is the easiest and fastest to soft wash. Cedar, stucco, EIFS/dryvit, and painted wood require more careful application, lower concentrations, and more rinsing — typically adding 15–25% to standard pricing. Roofs are priced separately because of safety requirements and the specific chemistry needed for shingles.
Access: Homes surrounded by dense landscaping, narrow side yards, or decorative elements that require extra care to protect add time and therefore cost. Steep lots, pools, or areas requiring extensive plant protection take additional setup time.
Combination Savings: Bundling house washing with roof cleaning or deck treatment typically saves 15–25% compared to booking each service separately. If multiple exterior surfaces need attention, booking them together almost always offers the best value.
Soft Washing vs. Pressure Washing Cost Comparison
Pressure washing for a similar home exterior typically runs $200–$500 — less than soft washing upfront. However, pressure washing results last 3–6 months on surfaces with biological growth, while soft washing results last 3–5 years. Over a five-year period, the total cost of repeated pressure washing often exceeds a single professional soft wash, particularly when you factor in the risk of surface damage from repeated high-pressure treatment.
DIY Soft Washing vs. Hiring a Pro
Soft washing solution (sodium hypochlorite at working concentrations) requires careful handling and appropriate equipment. Improper application can damage plants, strip surface coatings, or cause respiratory irritation. DIY soft washing kits are available at hardware stores but rarely achieve the solution concentrations and dwell times that produce lasting results. For siding and horizontal surfaces, an experienced DIYer with proper equipment can get reasonable results. For roofs, we strongly recommend professional application.
Getting an Accurate Quote
Soft washing prices should be based on an actual assessment of your property — not just square footage. A professional quote should specify which surfaces are included, the product concentration being used, whether pre-wetting and post-rinsing of landscaping is included, and how long results are expected to last.
D&D Home Services provides free on-site soft washing estimates across Kitchener-Waterloo, Cambridge, and Guelph. Contact us to book a free assessment and get an itemized quote for your specific home.
Key Takeaways
- ✓ Professional service saves time and delivers better results than DIY
- ✓ Regular maintenance protects your home's value and curb appeal
- ✓ D&D Home Services proudly serves Kitchener-Waterloo and surrounding areas
- ✓ Get a free no-obligation quote — call or book online anytime
Sources & References
- City of Kitchener — Property Maintenance Standards
- Ontario Building Code — Exterior Maintenance Guidelines
- D&D Home Services field experience across 500+ homes in KW Region
