DIY vs professional pressure washing
Updated 2026-10-18
- Best for a driveway
- DIY is realisticFlat, at ground level and forgiving if you keep the tip moving. A surface cleaner makes the finish even; a bare wand leaves stripes.
- Best for the house
- DIY one storey, hire above itSiding is a soft-wash job. Ground-floor walls are fine with a soap tip; ladders plus a wand is where it stops being a saving.
- Best for the roof
- Hire a soft-wash pro, every timeNo pressure on asphalt shingles at all, and the shingle makers recommend trained professionals for the work.
Run your own numbers
DIY or hire it out
Hiring it out, planning band
$200 - $400
Concrete flatwork / Moderate
Doing it yourself
$125 cash / $245 with your time
Counting your time, DIY costs as much as the low end of hiring it out on this job. The pro also carries the insurance if something goes wrong.
Pre-filled with example inputs, not prices: replace the rental, chemical and hours with your own quotes. The pro band is this site’s working band per square foot, built from the homewyse anchor in its pricing notes.
The pro side uses the same bands as the pressure washing cost calculator, so the two never disagree. For the full method behind them, read pressure washing prices.
The difference in one table
| Spec | Do it yourself | Hire a pro |
|---|---|---|
| What you pay | Rental or machine wear, chemical, your time | The job, usually with a call-out minimum |
| Machine | Homeowner class, often under 3 GPM | Contractor class, 4 GPM and up |
| Surface cleaner | Rarely, and usually undersized for the flow | Sized to the machine |
| Siding and roofs | Soap tip on the ground floor only | Soft wash at the right strength, any height |
| If something is damaged | You pay | Their general liability policy |
| Wash water | Your responsibility | Theirs, if the contract says so |
The tinted column is not a verdict on every job. On a small, flat, ground-level job the left column wins on cost; the table shows what the right column is charging for.
What a professional costs
The one published survey figure this site uses is homewyse’s: $0.42–$0.52 per square foot for basic pressure washing, with a two-hour minimum labour charge. Contractors price each surface differently because the method differs, so the bands below are this site’s own working bands built from that anchor — planning numbers, not quotes.
| Job | $ per sq ft | 1,000 sq ft |
|---|---|---|
| Concrete flatwork | 0.20–0.40 | $200–$400 |
| Vinyl or fibre-cement siding | 0.20–0.45 | $200–$450 |
| Wood deck or fence | 0.35–0.60 | $350–$600 |
| Asphalt shingle roof | 0.40–0.75 | $400–$750 |
Below a few hundred square feet the call-out floor sets the price, which is why a single patio rarely costs much less than a driveway. Price your own house in the house washing cost calculator or the driveway cleaning cost calculator.
Where DIY goes wrong
Most homeowners who get a bad result had enough pressure. The trouble is the wrong pressure on the wrong surface, and the PSI chart by surface is the quickest way to avoid it.
- Siding. Spraying upward drives water behind the lapped courses and into the wall. Siding is cleaned with a mix and a soap tip, as the vinyl siding guide explains, not with force.
- Roofs. Asphalt shingles take no pressure at all, and the shingle makers’ association recommends trained professionals for the work. The roof soft washing guide shows what the pro does instead.
- Concrete and wood. A 15-degree tip held close can etch concrete in lines that never wash out; too much pressure furs softwood decking. Both read as damage the day they dry.
- Brick. The Brick Industry Association caps it at 400 PSI at the tip. A homeowner machine at full pressure is far above that.
- You. A jet that breaks the skin often needs urgent surgery, and working a wand from a ladder is the riskiest way to use one. Keep both feet on the ground.
- Older paint. On a house built before 1978 the paint may contain lead. A paid contractor disturbing it must be certified under EPA’s lead rule, and the runoff carrying chips has to be contained.
Wash water is yours too
Renting or buying? A homeowner machine usually gives under 3 GPM, and a 15-inch surface cleaner wants about 3. The 2000 vs 3000 PSI comparison covers which class does which job, and pressure washing vs power washing explains what the rental counter means by “power washer”.
If you hire it out
Hiring checklist
- Ask for a certificate of general liability insurance before the job, not after. The insurance guide explains what it covers.
- Ask how each surface will be cleaned. “Soft wash” for siding and roofs is the right answer; a pressure number for the roof is the wrong one.
- Get the scope in writing, with what happens to oxidised siding, loose paint or etched concrete they find. A service agreement covers this.
- Ask where the wash water goes.
Is it cheaper to pressure wash my own driveway?
Usually, if you already own a machine and value your time low. Once you add a rental, chemical and a lost Saturday, the gap to a pro's call-out minimum is often small.
Can I soft wash my house myself?
The ground floor, yes, with a soap tip and the right mix. Above one storey the ladder work is where most of the risk sits, and that is where hiring it out earns its price.
Should I pressure wash my roof myself?
No. Asphalt shingles get no pressure at all, and the shingle makers recommend trained professionals for roof cleaning.
What should a pro's quote include?
The surfaces, the method for each, the price, what happens to pre-existing damage they find, and proof of general liability insurance.