Bring back the brilliance of your property
Full-service power washing, roof soft washing, and exterior maintenance across San Ramon and the East Bay. We protect your roof, gutters, windows, pavers, and solar, so your property looks its best and lasts longer.
Everything your exterior needs
Every surface gets the right method: low-pressure soft washing for roofs and siding, controlled high pressure for hardscapes. Nothing gets damaged, everything gets clean.
Roof Soft Washing
Low-pressure soft washing kills algae, moss, and lichen at the root and protects your shingles and warranty.
Learn more →House Soft Wash
Siding, stucco, and trim cleaned gently, lifting dirt and mildew without forcing water behind your cladding.
Learn more →Paver Patio Cleaning & Sealing
Deep cleaning, re-sanding, and sealing that locks joints, resists weeds, and restores a like-new finish.
Learn more →Gutter Cleaning & Guards
We clear debris, flush downspouts, and install flexible gutter guards that outperform the rest.
Learn more →Window Cleaning
Streak-free interior and exterior windows that lift curb appeal and let natural light back in.
Learn more →Solar Panel Cleaning
Rain alone will not keep panels efficient. We safely clean them so they capture the output you paid for.
Learn more →HomeGuard Maintenance Plan
Year-round exterior care on a fixed monthly rate. Roof soft wash, gutters, windows, and driveway cleaning scheduled for you, from $69/mo.
Learn more →And more
Fence and deck cleaning, rust and oil stain removal, dryer vent cleaning, and custom maintenance add-ons. If it is on the outside of your home, we clean it.
See all services →HOA Cleaning Services
Common areas and building facades kept clean and meeting community guidelines across the Bay Area.
Learn more →Property Management
Documented, recurring maintenance for retail centers and portfolios, one crew and one point of contact.
Learn more →Senior Living Facilities
Low-disruption exterior care with slip prevention that keeps communities safe and welcoming.
Learn more →Schools & Campus Washing
Walkways, playgrounds, and building exteriors kept clean and safe for students, staff, and visitors.
Learn more →Parking Garage Cleaning
Light cleaning and housekeeping that keeps parking structures clean, safe, and tidy for your customers.
Learn more →Hospitals & Care Facilities
Advanced exterior cleaning for hospitals and skilled nursing facilities meeting the highest standards.
Learn more →And more
Retail centers, apartment complexes, warehouses, churches, and custom recurring contracts. Tell us the property and we will build the schedule.
Talk to us →Before & after, side by side
Two minutes to a written quote
Tell us what you need
Send the details and we come back with a clear, written estimate. No pressure, no obligation, no surprise add-ons.
Residential
- Roof soft wash & house wash
- Gutters, windows, solar
- Driveways, pavers, patios
- HomeGuard plans from $69/mo
Commercial & HOA
- Common areas & building washing
- Senior living, schools, hospitals
- Parking garages & storefronts
- Recurring documented contracts
- ✓ Free, no-obligation written estimate
- ✓ Backed by our $5,000 satisfaction guarantee
- ✓ CSLB licensed #1022456, bonded and insured
- ✓ Diamond Certified, 150+ five-star reviews
Why we are not like other washers
Anyone can rent a machine. Very few show up licensed, insured, uniformed, and accountable for the result.
- Often unlicensed or unverifiable
- Little or no liability insurance
- High pressure on delicate roofs, risking damage
- Random subcontractors, no accountability
- No written guarantee if something goes wrong
- CSLB #1022456, publicly verifiable
- Fully bonded and insured on every job
- Low-pressure soft washing that protects your roof
- Trained, background-checked, uniformed technicians
- $5,000 satisfaction guarantee in writing
Licensed, vetted, and proud of it
We stand behind our work and are fully licensed under CSLB #1022456, bonded, and insured. When you hire Professional Powerwashing & Maintenance, you are hiring a legitimate, verified professional, and that matters more than most companies want to admit.
CSLB licensed & fully insured
Our CSLB license number is #1022456, publicly verifiable. We carry full liability insurance and bonding on every job. You are protected from the moment we arrive.
Diamond Certified & BBB rated
Diamond Certified requires a rigorous independent evaluation that fewer than 5% of companies pass. Combined with our strong BBB rating, that is third-party proof of consistent quality.
Serving the East Bay since 2014
Over a decade of exterior cleaning across San Ramon, Danville, Dublin, and Walnut Creek. 500+ local homeowners and businesses trust us with their properties year after year.
Professional uniformed technicians
Every technician is trained, background-checked, and arrives in uniform. No random subcontractors. 100% satisfaction guarantee on every job we complete.
We encourage the comparison
If you are considering other providers, take one moment to verify their CSLB license status exactly as you can verify ours. You deserve a legitimate professional, and so does your property.
BBB Rated
CSLB Licensed
Diamond CertifiedThe only $5,000 guarantee in San Ramon
If our work does not meet your expectations, we refund you up to $5,000. We are the only company in San Ramon confident enough to back our work this way. CSLB #1022456, Diamond Certified, and highly rated on BBB.
Rated excellent by East Bay homeowners
Stop paying one-off prices
Lock in year-round exterior care at a fixed monthly rate. Gutters, windows, house wash, roof soft wash, and driveway cleaning, all on a schedule, all handled for you.
✓ Scheduled visits, no reminders needed
✓ Priority booking in peak season
✓ Member-only pricing on add-ons
✓ Photo report after every visit
Plans from $69/mo
Three plan levels priced by home size. Priority booking included. 100 member spots for 2026.
Three steps to a cleaner property
01
Request your free estimate
Tell us what you need. We provide a fast, no-obligation estimate with clear, upfront pricing and no surprises.
02
Book your service
Pick a time that works for you. Our trained, insured technicians arrive on schedule, every time.
03
Enjoy the results
We restore the beauty of your property with safe, professional cleaning that lasts, and we stand behind it.
On the road across the East Bay
From estate roofs in the Danville hills to storefronts in Hayward, our crews cover the communities we call home.
Cities we cleanFull residential & commercial service, with dedicated local pages
Also serving nearbyResidential & commercial across the wider East Bay
Call (925) 633-4342 and we will confirm service to your address today.
Commercial & HOA onlyContract work for property managers, HOAs, and facilities
We take on commercial and HOA contracts beyond our residential radius. See commercial services →
Your property faces the weather every day. We make sure it wins.
Sun, rain, and time leave dirt, mould, and algae that make a property look neglected and quietly shorten the life of your roof, siding, and hardscapes. Left alone, that becomes an expensive problem.
We take it off your plate. Homeowners, businesses, and property managers across San Ramon, Danville, Alamo, Walnut Creek, and Dublin trust us to keep their exteriors clean, protected, and looking their best.
Why East Bay roofs grow moss year after year
Our Mediterranean cycle of wet winters and long, dry summers is unusually good at growing moss, algae, and lichen. Knowing the season tells you what your property is fighting, and when to treat it.
The wet season begins
First rains soak roofs after months of dry heat. Oak and sycamore leaves from mature canopy in Alamo, Danville, and Lafayette drop into gutters and hold water against fascia boards.
Peak moss growth
Heaviest rainfall lands in these months. North-facing slopes stay damp for weeks and never fully dry. Moss and lichen colonise shingles and tile grout most aggressively now.
The marine layer window
Mild 60 to 75F days plus morning marine-layer moisture through the Carquinez gap. The ideal growth range for roof organisms, and the best window to treat before summer.
Dormant, not dead
Moss looks like it died off in the dry heat. It did not. It goes dormant and rehydrates within hours of the first autumn rain, which is why a summer rinse accomplishes nothing.
Why the East Bay is harder on roofs than most of California. Our Mediterranean cycle of wet winters and long dry summers is unusually favourable to biological growth. Add the mature tree canopy across Alamo, Danville, Moraga, and Lafayette, the shaded north-facing slopes common in the hills, and pollen drifting in from Las Trampas, and you get roofs that grow moss and lichen year after year. Asphalt shingles are engineered to last 20 to 40 years. Many East Bay roofs are replaced far sooner, not because the product failed, but because biological growth was left alone.
We match the method to the material
There is no single setting that safely cleans a cedar shake roof and a concrete driveway. Using one is how roofs get damaged and warranties get voided.
Asphalt & composite shingle
The most common roof across San Ramon, Dublin, and Pleasanton. Black streaking is gloeocapsa magma, a cyanobacteria that feeds on limestone filler in the shingle. High pressure strips the protective granules and voids most manufacturer warranties.
Our method: low-pressure soft wash with a biodegradable solution that kills growth at the root.
Concrete & clay tile
Common through Danville, Alamo, and newer San Ramon developments. Lichen is the real threat here. It anchors into tile with root-like rhizines that crack grout and degrade the surface over years.
Our method: soft wash reaches into those structures. Pressure washing only breaks the surface off and leaves the roots behind.
Cedar shake & wood shingle
Found on older estate properties in Alamo, Moraga, and the Lafayette hills, often under heavy oak canopy. Untreated for three or four seasons, shake accumulates moss, lichen, and black algae that accelerates rot with every wet winter.
Our method: gentle algaecide treatment, never pressure, to protect the wood grain.
Stucco, siding & hardscape
Stucco and painted siding hold mould and algae inside the texture. It looks like discolouration but will not rinse off without proper chemical treatment. Driveways and pavers take controlled high pressure with the correct surface-cleaner attachment.
Our method: matched to the material, never one setting for everything.
Soft washing (delicate surfaces)
Roofs, siding, stucco, and wood. Low pressure plus a biodegradable cleaning solution that kills the organism at the root. It is the method roofing manufacturers actually recommend, and the only one that stops regrowth rather than blasting spores loose to spread.
Controlled pressure (hardscape only)
Driveways, walkways, patios, and concrete. We use a surface-cleaner attachment, not a wand, for even results without streaking or etching, and we pre-treat oil-stained areas with a degreaser first.
The benefits of regular power washing
Maintain property value
Routine cleaning keeps mould, mildew, and grime from taking hold, protecting how your property looks and what it is worth.
Prevent costly repairs
We remove the fungus, lichen, and gloeocapsa magma that erode roofs and surfaces over time, helping you avoid expensive repairs.
Preserve curb appeal
Regular washing keeps dirt and dust from dulling your exterior, so your home or business always makes a strong first impression.
The details most companies skip
The difference between a good exterior clean and an expensive mistake is in the parts nobody advertises. These are standard on every job we do.
We protect what grows
Plant protection is not optional, it is part of the job. We pre-wet and shield landscaping, then rinse thoroughly and neutralise the solution before it ever reaches your garden beds, lawn, or hardscape.
Photos of every section
You get before and after photos section by section, not one wide-angle shot. That gives you a real record for your HOA, your insurer, or future sale documentation.
Adjusted to the job
What works on a concrete tile roof in July is not the mix we use on a shake roof in November after a wet season. Solution strength and dwell time are set for the material and the conditions.
Serving San Ramon and beyond
Questions, answered
Will pressure washing damage my roof?+
How often should I have my exterior cleaned?+
Are you licensed and insured?+
What is the HomeGuard maintenance membership?+
Do you work with property managers and HOAs?+
What are the black streaks on my roof?+
Why does moss keep coming back on the north side of my roof?+
When is the best time of year to have my roof cleaned?+
Will the cleaning solution harm my plants, pets, or lawn?+
Does roof cleaning affect my home insurance?+
How much does exterior cleaning cost in the East Bay?+
How long does the work take, and do I need to be home?+
Ready for a perfectly clean property?
Keep your home or workplace protected and looking its best. Free estimate, no obligation, backed by our $5,000 guarantee.