Top-Rated Pressure Washing & Exterior Cleaning in San Mateo, CA
San Mateo's closer-set lots mean the driveway and front walkway make up much of what people see from the street, so hardscape cleaning matters here as much as the house itself.
Peninsula Exterior Care is a 5-star rated, fully insured professional exterior cleaning company based in Atherton, serving San Mateo and the surrounding Peninsula. We hold a 5.0 rating across 26 Google reviews, we are insured, and we match the cleaning method to each surface rather than running one pressure setting across an entire property.
Peninsula Exterior Care provides pressure washing, house washing and soft washing, roof cleaning, window cleaning, gutter cleaning, solar panel cleaning, and driveway and concrete cleaning throughout San Mateo. We are based in Atherton and match the method to the surface rather than running one setting across an entire property.
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Exterior cleaning services in San Mateo
Every surface outside a home wants a different method. Here is how we approach each one, and what it usually involves on a San Mateo property.
Pressure Washing in San Mateo
Pressure washing is the right tool for hard, structurally sound flatwork — concrete driveways, walkways, steps and paver surfaces. It removes material by force, which is exactly what a slab needs and exactly what siding does not. On a San Mateo property we set the pressure to the surface rather than running one setting across the whole job, and we use rotary surface cleaners on open flatwork so the finish is even instead of striped.
House Washing & Soft Washing in San Mateo
Exterior house cleaning here covers stucco, vinyl siding, painted wood and fiber cement, and each behaves differently under water. Stucco is porous and absorbs; vinyl has overlapping panels that trap water forced behind them; painted wood splinters and loses finish. That is why house washing in San Mateo is a soft wash — low pressure plus the right detergent, with dwell time doing the actual work on algae, mould and mildew.
Roof Cleaning & Organic Growth Removal in San Mateo
Roof washing in San Mateo is worth doing before the growth becomes structural rather than cosmetic. Lichen in particular anchors into the shingle surface and is far harder to remove once established. Everything we do on a roof is low pressure — no wand, no blasting, no walking on tile anywhere weight should not go.
Window Cleaning in San Mateo
Window cleaning in San Mateo covers interior and exterior glass, frames, sills, tracks and screens. Tracks and screens are the part most often skipped, and skipping them is why glass looks hazy again within a week. Irrigation overspray is the other common issue: sprinklers hitting ground-floor glass leave mineral deposits that ordinary glass cleaner will not remove and that need a specific hard-water treatment.
Gutter Cleaning in San Mateo
A clogged gutter is not just an overflow problem. Packed wet debris is heavy enough to pull fasteners loose and sag the run, and standing water keeps the fascia and roof edge permanently damp. On San Mateo properties, especially those under mature trees, twice a year is the baseline — once before the wet season and once after it.
Solar Panel Cleaning in San Mateo
The best time for solar panel washing in San Mateo is late summer through early autumn — after a full dry season of accumulation, and before shorter winter days when every bit of light counts. We clean with soft brushes and deionised or filtered water so the glass dries without spotting, and we clear debris from the array edge and adjacent roof valley at the same time.
Driveway Cleaning in San Mateo
Driveway cleaning in San Mateo deals with oil staining, tyre marks, algae in the shaded sections and general traffic film. We use rotary surface cleaners rather than a handheld wand, which is what produces an even finish instead of the striped, arc-patterned look a wand leaves. Oil and rust need targeted pre-treatment before the main clean rather than the same approach as everything else.
Concrete & Sidewalk Cleaning in San Mateo
Walkways, sidewalks, entry steps, pool surrounds and garage aprons all fall under concrete cleaning. On San Mateo properties we pre-treat organic growth so it is killed at the root, surface clean the field of the slab for even coverage, then detail edges, joints and steps by hand where a surface cleaner cannot reach.
Patio & Deck Cleaning in San Mateo
If you are planning to stain or seal a deck in San Mateo, clean first and let it dry fully — usually a couple of days. Sealing over a damp or dirty deck traps the problem underneath and causes hazing, which is a callback nobody wants.
Commercial Exterior Cleaning in San Mateo
Commercial exterior cleaning in San Mateo covers storefronts, office buildings, walkways, entryways, parking areas, dumpster pads and awnings. Most of it is better done outside business hours, so early morning, evening and weekend scheduling is normal — the goal is that customers see the result and never see the work.
What we commonly see on San Mateo properties
San Mateo has one of the more varied housing stocks on the Peninsula: Spanish revival and Tudor homes in San Mateo Park and Baywood, mid-century tracts in the Highlands and Sunnybrae, and denser development near downtown and the Hillsdale corridor. The older neighbourhoods have stucco and tile roofs, both of which need careful low-pressure work, while the flatter eastern neighbourhoods run toward stucco with composition roofs. Because lots are smaller than further south, driveways and front walkways are a large share of what is visible from the street.
Common exterior cleaning problems in San Mateo
Most of what makes a San Mateo exterior look tired is biological rather than dirt. Algae, mildew, moss and lichen grow where shade and moisture last longest, and they have root structure in whatever they are growing on — which is why rinsing removes the colour for a few weeks and then it comes back. Not every property has all of these — but most have two or three.
- Traffic film and general dulling. Airborne dust and pollen that builds through the dry season and flattens the colour of a whole elevation.
- Algae, mould and mildew on siding. Usually worst on north-facing elevations and anywhere under tree cover, where surfaces stay damp longest.
- Roof streaking, moss and lichen. Dark streaks on asphalt shingle are typically algae; moss and lichen establish in valleys and along shingle edges where debris holds water.
- Black staining on shaded concrete. Organic film on walkways and driveway edges. It is also slippery when wet, which makes shaded flatwork a safety issue as well as an appearance one.
- Tree-related buildup. Sap, leaf litter, seed pods and needles feeding growth on roofs, in gutters and across hardscape.
- Oil and tyre staining on driveways. Oil soaks into porous concrete rather than sitting on it, so it needs a degreaser and dwell time, not just pressure.
How we clean different exterior surfaces
Pressure washing and soft washing are different tools for different materials. This is the short version of which gets used where.
| Surface | Method we use |
|---|---|
| Stucco | Porous and absorbent. Soft wash only — pressure can drive water behind the surface and open hairline cracking. |
| Vinyl siding | Low-pressure soft wash, worked top-down. Panels overlap, and water forced behind them does not drain or dry well. |
| Painted & wood siding | The gentlest setting we use. Pressure furs the grain and lifts paint unevenly. |
| Fiber cement | Tolerates more than wood but still gets a soft wash rather than pressure. |
| Asphalt shingle roof | Low-pressure soft wash. Pressure strips the protective granules and typically voids the manufacturer warranty. |
| Concrete & clay tile roof | Low pressure, deliberate foot placement on the structural high points of the tile profile. |
| Concrete flatwork | Genuine pressure with a rotary surface cleaner for an even finish, plus pre-treatment on organic growth. |
| Pavers | Controlled pressure to protect joint sand, with fresh sand afterward where it is worth doing. |
| Wood & composite decking | Low pressure with the grain. Composite has a manufacturer pressure ceiling worth respecting. |
| Glass, screens & solar | No pressure. Soft brushes and filtered water so the glass dries without mineral spotting. |
Read the full explanation: pressure washing vs soft washing →
Recent work across the Peninsula
Real photographs from our own jobs — full frames, before and after, nothing cropped to make the angles line up.
Why San Mateo homeowners choose Peninsula Exterior Care
Peninsula Exterior Care is professional and based in Atherton, so the person quoting your San Mateo job is the person doing it. We would rather set a realistic expectation up front than surprise you at the end.
Habib did a great job on our deck roof ! He came on time, helped us move planters/ chairs etc out of the way and did a great job.
He was courteous, patient, thorough and respectful of our things / property . And he is reasonably priced too !
It was a pleasure to work with Habib. We will surely use his services for all our external washing needs !
Absolutely thrilled with the service! My solar panels are spotless, all the built-up dust, pollen, and grime is completely gone. You can already see the difference. Professional, thorough, and great attention to detail. Will definitely be booking again and highly recommend to anyone looking to get the most out of their solar system! Thank you for your help and great work.
Exterior cleaning FAQs — San Mateo
Can you clean solar panels without damaging them?
Yes, with the right method. Panel glass scratches permanently, so nothing abrasive and no harsh chemicals go near it. We use soft brushes and filtered or deionised water, which also means the glass dries without leaving mineral spotting.
Do you clean second-storey homes?
Yes. Two and three-storey elevations, upper windows, skylights and roof work are normal parts of the job, and we bring the access equipment for it rather than skipping what is hard to reach.
Do you provide commercial pressure washing in San Mateo?
Yes — storefronts, offices, walkways, entryways, parking areas and building exteriors, for property managers, retail, restaurants and HOA common areas. Most commercial work is scheduled outside business hours.
Do you remove algae, moss and mildew?
That is the majority of what we do. All three are living organic growth, which is why we soft wash with a solution and dwell time rather than relying on pressure. Killing it at the root is the difference between results that last a year and results that last a month.
How soon can you get out to San Mateo?
Usually within a few days of booking. Autumn gutter season and spring are our busiest stretches, so book earlier in those windows if you need a specific week.
Do I need to be home during the work?
Not usually, as long as we have access to the areas being cleaned and an outdoor water spigot. Plenty of jobs happen while the homeowner is at work.
Is soft washing safe for my landscaping?
Yes. Plants near the work area are pre-wet before we start and rinsed thoroughly afterward, and anything particularly sensitive gets covered. Tell us about it when we walk the property.
How much does pressure washing cost in San Mateo?
It depends on the property rather than the city — square footage, number of storeys, the surfaces involved, how long it has been since the last clean, and access. We do not price by city, and we do not quote a range sight-unseen. Send a few photos or book a walkthrough and you will get a real number, usually the same day.
Is pressure washing safe for stucco?
High pressure is not. Stucco is porous, and pressure can force water into and behind the surface and open up hairline cracking. Stucco gets a soft wash: low pressure plus a detergent that breaks down algae and mildew chemically, with dwell time doing the work.
Areas we serve near San Mateo
Why homeowners choose us
What makes Peninsula Exterior Care a top-rated exterior cleaning company in San Mateo?
We hold a 5.0 rating across 26 Google reviews, we are a professional exterior cleaning company based in Atherton, and we are fully insured. Every quote is walked with you before work starts, and we match the cleaning method to each surface — soft washing for siding, stucco and roofs, controlled pressure only where a surface can safely take it.
Are you a professional and insured exterior cleaning company?
Yes. Peninsula Exterior Care is insured and we are happy to provide current documentation before work begins. We are an established local company serving the Peninsula, and we bring the same crew and the same standards to every property we work on.
How do I choose a reliable pressure washing company in San Mateo?
Look for three things: verifiable reviews rather than claims, a company that explains which method it will use on each surface, and honesty about what will not fully come out. Old oil in concrete, long-set hard water etching and efflorescence all improve rather than disappear — any company promising complete removal is overpromising.
Do you serve San Mateo regularly, or only occasionally?
We work in San Mateo regularly. We are based in Atherton and cover the Peninsula, South Bay and San Francisco, so this is an area we are in rather than travel to occasionally.
Free quote for your San Mateo property
Send a few details — or a couple of photos — and we'll come back with a price, usually the same day.